diff --git a/Makerules b/Makerules
index 2736db7..85cab98 100644
--- a/Makerules
+++ b/Makerules
@@ -1161,9 +1161,6 @@ lib := nonlib
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 endif
 
-# The include magic above causes those files to use this variable for flags.
-CPPFLAGS-nonlib = -DNOT_IN_libc=1
-
 
 ifeq ($(build-shared),yes)
 # Generate normalized lists of symbols, versions, and data sizes.
diff --git a/bits/stdio-lock.h b/bits/stdio-lock.h
index 198cb67..f68b13e 100644
--- a/bits/stdio-lock.h
+++ b/bits/stdio-lock.h
@@ -44,7 +44,7 @@ __libc_lock_define_recursive (typedef, _IO_lock_t)
 #define _IO_cleanup_region_end(_doit) \
   __libc_cleanup_region_end (_doit)
 
-#if defined _LIBC && !defined NOT_IN_libc
+#if defined _LIBC && IS_IN (libc)
 # define _IO_acquire_lock(_fp) \
   _IO_cleanup_region_start ((void (*) (void *)) _IO_funlockfile, (_fp));      \
   _IO_flockfile (_fp)
diff --git a/elf/Makefile b/elf/Makefile
index b739a97..925eeb5 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -97,7 +97,6 @@ install-others += $(inst_auditdir)/sotruss-lib.so
 install-bin-script += sotruss
 generated += sotruss
 libof-sotruss-lib = extramodules
-CPPFLAGS-sotruss-lib = -DNOT_IN_libc
 $(objpfx)sotruss-lib.so: $(objpfx)sotruss-lib.os
 	$(build-module-asneeded)
 $(objpfx)sotruss-lib.so: $(common-objpfx)libc.so $(objpfx)ld.so \
@@ -356,8 +355,7 @@ $(objpfx)ld.so: $(objpfx)librtld.os $(ld-map)
 
 # interp.c exists just to get this string into the libraries.
 libof-interp = extramodules
-CFLAGS-interp.c = -D'RUNTIME_LINKER="$(rtlddir)/$(rtld-installed-name)"' \
-		  -DNOT_IN_libc=1
+CFLAGS-interp.c = -D'RUNTIME_LINKER="$(rtlddir)/$(rtld-installed-name)"'
 $(objpfx)interp.os: $(common-objpfx)config.make
 
 ifneq (ld.so,$(rtld-installed-name))
@@ -432,15 +430,12 @@ $(objpfx)ldconfig: $(ldconfig-modules:%=$(objpfx)%.o)
 
 SYSCONF-FLAGS := -D'SYSCONFDIR="$(sysconfdir)"'
 CFLAGS-ldconfig.c = $(SYSCONF-FLAGS) -D'LIBDIR="$(libdir)"' \
-		    -D'SLIBDIR="$(slibdir)"' -DNOT_IN_libc
+		    -D'SLIBDIR="$(slibdir)"'
 libof-ldconfig = ldconfig
 CFLAGS-dl-cache.c = $(SYSCONF-FLAGS)
 CFLAGS-cache.c = $(SYSCONF-FLAGS)
 CFLAGS-rtld.c = $(SYSCONF-FLAGS)
 
-CPPFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
-		     -DNOT_IN_libc=1)
-
 cpp-srcs-left := $(all-rtld-routines:=.os)
 lib := rtld
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
diff --git a/elf/rtld-Rules b/elf/rtld-Rules
index 4e7c9ef..d2dc606 100644
--- a/elf/rtld-Rules
+++ b/elf/rtld-Rules
@@ -138,12 +138,10 @@ ifdef rtld-depfiles
 -include $(rtld-depfiles)
 endif
 
+# This here is the whole point of all the shenanigans.
 # Set libof-* for each routine.
 cpp-srcs-left := $(subst .os,,$(rtld-modules))
 lib := rtld
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 
-# This here is the whole point of all the shenanigans.
-rtld-CPPFLAGS := -DNOT_IN_libc=1
-
 endif
diff --git a/extra-lib.mk b/extra-lib.mk
index 7cdf823..b10748d 100644
--- a/extra-lib.mk
+++ b/extra-lib.mk
@@ -105,5 +105,3 @@ cpp-srcs-left := $($(lib)-routines) $($(lib)-sysdep_routines)
 ifneq (,$(cpp-srcs-left))
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 endif
-
-CPPFLAGS-$(lib) := -DNOT_IN_libc=1
diff --git a/extra-modules.mk b/extra-modules.mk
index 9c2e4d2..5f8e693 100644
--- a/extra-modules.mk
+++ b/extra-modules.mk
@@ -7,4 +7,3 @@ module := $(firstword $(extra-modules-left))
 extra-modules-left := $(filter-out $(module),$(extra-modules-left))
 
 libof-$(notdir $(module)) := extramodules
-CPPFLAGS-$(module).c += -DNOT_IN_libc
diff --git a/iconv/Makefile b/iconv/Makefile
index 8031a88..d1a9011 100644
--- a/iconv/Makefile
+++ b/iconv/Makefile
@@ -52,8 +52,6 @@ CFLAGS-gconv_cache.c += -DGCONV_DIR='"$(gconvdir)"'
 CFLAGS-gconv_conf.c = -DGCONV_PATH='"$(gconvdir)"'
 CFLAGS-iconvconfig.c = -DGCONV_PATH='"$(gconvdir)"' -DGCONV_DIR='"$(gconvdir)"'
 
-CPPFLAGS-iconvprogs = -DNOT_IN_libc
-
 # Set libof-* for each routine.
 cpp-srcs-left := $(iconv_prog-modules) $(iconvconfig-modules)
 lib := iconvprogs
diff --git a/iconvdata/Makefile b/iconvdata/Makefile
index 63ed612..3012c00 100644
--- a/iconvdata/Makefile
+++ b/iconvdata/Makefile
@@ -75,9 +75,6 @@ endif
 test-srcs := tst-table-from tst-table-to
 endif
 
-# No code here is in libc.so.
-CPPFLAGS += -DNOT_IN_libc
-
 libJIS-routines := jis0201 jis0208 jis0212
 libKSC-routines := ksc5601
 libGB-routines := gb2312
@@ -275,7 +272,9 @@ endif
 include ../Rules
 
 # Set libof-* for each routine.
-cpp-srcs-left := $(modules) $(generated-modules)
+cpp-srcs-left := $(modules) $(generated-modules) $(libJIS-routines) \
+		 $(libKSC-routines) $(libGB-routines) $(libCNS-routines) \
+		 $(libISOIR165-routines) $(libJISX0213-routines)
 lib := iconvdata
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 
diff --git a/include/assert.h b/include/assert.h
index abe182f..c452667 100644
--- a/include/assert.h
+++ b/include/assert.h
@@ -20,7 +20,7 @@ extern void __assert_fail_base (const char *fmt, const char *assertion,
 				const char *function)
      __THROW  __attribute__ ((__noreturn__));
 
-# if !defined NOT_IN_libc || IS_IN (rtld)
+# if IS_IN (libc) || IS_IN (rtld)
 hidden_proto (__assert_fail)
 hidden_proto (__assert_perror_fail)
 # endif
diff --git a/include/ctype.h b/include/ctype.h
index 6a18039..8eaa3be 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -7,7 +7,7 @@ libc_hidden_proto (__ctype_init)
 
 extern int __isctype (int __c, int __mask);
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 
 /* These accessors are used by the optimized macros to find the
    thread-local cache of ctype information from the current thread's
@@ -46,13 +46,13 @@ __ctype_tolower_loc (void)
   return __libc_tsd_address (const int32_t *, CTYPE_TOLOWER);
 }
 
-# endif	/* Not NOT_IN_libc.  */
+# endif	/* IS_IN (libc).  */
 #endif
 
 #include <ctype/ctype.h>
 
 #ifndef _ISOMAC
-# if !defined __NO_CTYPE && !defined NOT_IN_libc
+# if !defined __NO_CTYPE && IS_IN (libc)
 /* The spec says that isdigit must only match the decimal digits.  We
    can check this without a memory access.  */
 #  undef isdigit
diff --git a/include/errno.h b/include/errno.h
index d650a15..7df41df 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -22,19 +22,19 @@
 #  define errno rtld_errno
 extern int rtld_errno attribute_hidden;
 
-# elif !defined NOT_IN_libc || IS_IN_LIB
+# elif IS_IN_LIB
 
 #  include <tls.h>
 
 #  undef  errno
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define errno __libc_errno
 #  else
 #   define errno errno		/* For #ifndef errno tests.  */
 #  endif
 extern __thread int errno attribute_tls_model_ie;
 
-# endif	/* !NOT_IN_libc || IS_IN_LIB */
+# endif	/* IS_IN_LIB */
 
 # define __set_errno(val) (errno = (val))
 
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 34702a7..5eb9e83 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -567,7 +567,7 @@ for linking")
 # define hidden_nolink(name, lib, version)
 #endif
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 # define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
 # define libc_hidden_tls_proto(name, attrs...) hidden_tls_proto (name, ##attrs)
 # define libc_hidden_def(name) hidden_def (name)
diff --git a/include/math.h b/include/math.h
index b10bfa0..42bb55e 100644
--- a/include/math.h
+++ b/include/math.h
@@ -6,7 +6,7 @@
 /* Now define the internal interfaces.  */
 extern int __matherr (struct exception *__exc);
 
-# if !defined NOT_IN_libc || IS_IN (libm)
+# if IS_IN (libc) || IS_IN (libm)
 hidden_proto (__finite)
 hidden_proto (__isinf)
 hidden_proto (__isnan)
diff --git a/include/netdb.h b/include/netdb.h
index eccdbe6..9e64a15 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -4,15 +4,15 @@
 
 #ifndef _ISOMAC
 /* Macros for accessing h_errno from inside libc.  */
-# if !defined NOT_IN_libc || IS_IN_LIB
+# if IS_IN_LIB
 #  undef  h_errno
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define h_errno __libc_h_errno
 #  else
 #   define h_errno h_errno	/* For #ifndef h_errno tests.  */
 #  endif
 extern __thread int h_errno attribute_tls_model_ie;
-# endif /* !NOT_IN_libc || IS_IN_LIB */
+# endif /* IS_IN_LIB */
 # define __set_h_errno(x) (h_errno = (x))
 
 libc_hidden_proto (hstrerror)
diff --git a/include/resolv.h b/include/resolv.h
index 3904cb7..4c61476 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -13,7 +13,7 @@
 
 #ifdef _RESOLV_H_
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define __resp __libc_resp
 # endif
 extern __thread struct __res_state *__resp attribute_tls_model_ie;
diff --git a/include/stdio.h b/include/stdio.h
index 9f2ea31..53a2c58 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -117,7 +117,7 @@ extern const char *const _sys_errlist_internal[] attribute_hidden;
 extern int _sys_nerr_internal attribute_hidden;
 
 libc_hidden_proto (__asprintf)
-#  if !defined NOT_IN_libc
+#  if IS_IN (libc)
 extern _IO_FILE *_IO_new_fopen (const char*, const char*);
 #   define fopen(fname, mode) _IO_new_fopen (fname, mode)
 extern _IO_FILE *_IO_new_fdopen (int, const char*);
diff --git a/include/stdlib.h b/include/stdlib.h
index e50985a..734f251 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -226,7 +226,7 @@ extern int __qfcvt_r (long double __value, int __ndigit,
 		      int *__restrict __decpt, int *__restrict __sign,
 		      char *__restrict __buf, size_t __len);
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  undef MB_CUR_MAX
 #  define MB_CUR_MAX (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MB_CUR_MAX))
 
diff --git a/include/string.h b/include/string.h
index 8323412..0d40682 100644
--- a/include/string.h
+++ b/include/string.h
@@ -57,7 +57,7 @@ extern __typeof (strcasecmp_l) __strcasecmp_l;
 extern __typeof (strncasecmp_l) __strncasecmp_l;
 
 /* Alternative version which doesn't pollute glibc's namespace.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # undef strndupa
 # define strndupa(s, n)							      \
   (__extension__							      \
diff --git a/include/sys/stat.h b/include/sys/stat.h
index a44fbec..873562a 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -12,7 +12,7 @@ extern __mode_t __umask (__mode_t __mask);
 extern int __mkdir (const char *__path, __mode_t __mode);
 extern int __mknod (const char *__path,
 		    __mode_t __mode, __dev_t __dev);
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 hidden_proto (__fxstat)
 hidden_proto (__fxstat64)
 hidden_proto (__lxstat)
diff --git a/include/wctype.h b/include/wctype.h
index a2ee9ff..bacd719 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -89,7 +89,7 @@ libc_hidden_proto (__towupper_l)
 
 /* The spec says that isdigit must only match the decimal digits.  We
    can check this without a memory access.  */
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  undef iswdigit
 #  define iswdigit(c) ({ wint_t __c = (c); __c >= L'0' && __c <= L'9'; })
 #  undef iswdigit_l
diff --git a/intl/l10nflist.c b/intl/l10nflist.c
index 428a3f1..ca04ad3 100644
--- a/intl/l10nflist.c
+++ b/intl/l10nflist.c
@@ -324,7 +324,7 @@ _nl_normalize_codeset (codeset, name_len)
   char *retval;
   char *wp;
   size_t cnt;
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
   locale_t locale = newlocale (0, "C", NULL);
 #else
 # define locale _nl_C_locobj_ptr
diff --git a/libidn/idn-stub.c b/libidn/idn-stub.c
index 9361b25..afd93ca 100644
--- a/libidn/idn-stub.c
+++ b/libidn/idn-stub.c
@@ -130,7 +130,7 @@ __idna_to_ascii_lz (const char *input, char **output, int flags)
 }
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 libc_freeres_fn (unload_libidn)
 {
   if (h != NULL && h != (void *) 1l)
diff --git a/libio/libioP.h b/libio/libioP.h
index bd94041..08b77ca 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -902,7 +902,7 @@ _IO_acquire_lock_clear_flags2_fct (_IO_FILE **p)
     _IO_funlockfile (fp);
 }
 
-#if !defined _IO_MTSAFE_IO && !defined NOT_IN_libc
+#if !defined _IO_MTSAFE_IO && IS_IN (libc)
 # define _IO_acquire_lock(_fp)						      \
   do {									      \
     _IO_FILE *_IO_acquire_lock_file = NULL
diff --git a/locale/Makefile b/locale/Makefile
index 4c22c74..2b2cdde 100644
--- a/locale/Makefile
+++ b/locale/Makefile
@@ -88,14 +88,13 @@ locale-CPPFLAGS = -DLOCALEDIR='"$(localedir)"' \
 CPPFLAGS-locale_programs = -DLOCALE_PATH='$(localepath)' \
 			   -DCHARMAP_PATH='"$(i18ndir)/charmaps"' \
 			   -DREPERTOIREMAP_PATH='"$(i18ndir)/repertoiremaps"' \
-			   -DLOCSRCDIR='"$(i18ndir)/locales"' \
-			   -DNOT_IN_libc
+			   -DLOCSRCDIR='"$(i18ndir)/locales"'
 
 CFLAGS-charmap.c = -Wno-write-strings -Wno-char-subscripts
 CFLAGS-locfile.c = -Wno-write-strings -Wno-char-subscripts
 CFLAGS-charmap-dir.c = -Wno-write-strings
 
-# This makes sure -DNOT_IN_libc et al are passed for all these modules.
+# Set libof-* for each routine.
 cpp-srcs-left := $(localedef-modules) $(localedef-aux) $(locale-modules) \
 		 $(lib-modules)
 lib := locale_programs
diff --git a/malloc/Makefile b/malloc/Makefile
index 10a53f6..7d8d5a5 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -48,8 +48,6 @@ extra-objs = mcheck-init.o libmcheck.a
 # Include the cleanup handler.
 aux := set-freeres thread-freeres
 
-CPPFLAGS-memusagestat = -DNOT_IN_libc
-
 # The Perl script to analyze the output of the mtrace functions.
 ifneq ($(PERL),no)
 install-bin-script = mtrace
diff --git a/nptl/libc_multiple_threads.c b/nptl/libc_multiple_threads.c
index acf3594..0361f6c 100644
--- a/nptl/libc_multiple_threads.c
+++ b/nptl/libc_multiple_threads.c
@@ -18,7 +18,7 @@
 
 #include <pthreadP.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifndef TLS_MULTIPLE_THREADS_IN_TCB
 /* Variable set to a nonzero value either if more than one thread runs or ran,
    or if a single-threaded process is trying to cancel itself.  See
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index d75aeac..a8d5fb4 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -286,7 +286,7 @@ __do_cancel (void)
 #define CANCEL_RESET(oldtype) \
   __pthread_disable_asynccancel (oldtype)
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 # define LIBC_CANCEL_ASYNC() \
   __libc_enable_asynccancel ()
diff --git a/nscd/Makefile b/nscd/Makefile
index 40e99aa..8e03e9e 100644
--- a/nscd/Makefile
+++ b/nscd/Makefile
@@ -79,7 +79,7 @@ CFLAGS-nscd_gethst_r.c = -fexceptions
 CFLAGS-nscd_getai.c = -fexceptions
 CFLAGS-nscd_initgroups.c = -fexceptions
 
-CPPFLAGS-nscd += -D_FORTIFY_SOURCE=2 -DNOT_IN_libc
+CPPFLAGS-nscd += -D_FORTIFY_SOURCE=2
 
 ifeq (yesyes,$(have-fpie)$(build-shared))
 CFLAGS-nscd += $(pie-ccflag)
diff --git a/nss/Makefile b/nss/Makefile
index 41d685c..7dcb68b 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -116,7 +116,6 @@ $(inst_vardbdir)/Makefile: db-Makefile $(+force)
 	$(do-install)
 
 libof-nss_test1 = extramodules
-CPPFLAGS-nss_test1 = -DNOT_IN_libc=1
 $(objpfx)/libnss_test1.so: $(objpfx)nss_test1.os $(link-libc-deps)
 	$(build-module)
 ifdef libnss_test1.so-version
diff --git a/posix/regex_internal.h b/posix/regex_internal.h
index 4bbf6a8..58f7766 100644
--- a/posix/regex_internal.h
+++ b/posix/regex_internal.h
@@ -382,7 +382,7 @@ typedef struct re_dfa_t re_dfa_t;
 # endif
 #endif
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 static reg_errcode_t re_string_realloc_buffers (re_string_t *pstr,
 						int new_buf_len)
      internal_function;
@@ -732,7 +732,7 @@ re_string_wchar_at (const re_string_t *pstr, int idx)
   return (wint_t) pstr->wcs[idx];
 }
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 static int
 internal_function __attribute__ ((pure, unused))
 re_string_elem_size_at (const re_string_t *pstr, int idx)
diff --git a/resolv/res_hconf.c b/resolv/res_hconf.c
index b4c8622..cde0229 100644
--- a/resolv/res_hconf.c
+++ b/resolv/res_hconf.c
@@ -358,7 +358,7 @@ _res_hconf_init (void)
 }
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # if defined SIOCGIFCONF && defined SIOCGIFNETMASK
 /* List of known interfaces.  */
 libc_freeres_ptr (
diff --git a/stdlib/Makefile b/stdlib/Makefile
index da6e076..76b7ca7 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -146,7 +146,6 @@ LDFLAGS-tst-putenv = $(no-as-needed)
 $(objpfx)tst-putenvmod.so: $(objpfx)tst-putenvmod.os $(link-libc-deps)
 	$(build-module)
 libof-tst-putenvmod = extramodules
-CFLAGS-tst-putenvmod.c = -DNOT_IN_libc=1
 
 $(objpfx)bug-getcontext: $(libm)
 $(objpfx)tst-strtod-round: $(libm)
diff --git a/stdlib/isomac.c b/stdlib/isomac.c
index 13accb5..6fc97cd 100644
--- a/stdlib/isomac.c
+++ b/stdlib/isomac.c
@@ -176,7 +176,8 @@ static char *macros[] =
 /* Format string to build command to invoke compiler.  */
 static const char fmt[] = "\
 echo \"#include <%s>\" |\
-%s -E -dM -ansi -pedantic %s -D_LIBC -D_ISOMAC -DNOT_IN_libc -I. \
+%s -E -dM -ansi -pedantic %s -D_LIBC -D_ISOMAC \
+-DIN_MODULE=MODULE_extramodules -I. \
 -isystem `%s --print-prog-name=include` - 2> /dev/null > %s";
 
 
@@ -305,7 +306,7 @@ get_null_defines (void)
 	;
       result[result_len] = xstrndup (start, end - start);
 
-      if (strcmp (result[result_len], "NOT_IN_libc") != 0)
+      if (strcmp (result[result_len], "IN_MODULE") != 0)
 	{
 	  if (first)
 	    {
diff --git a/sunrpc/Makefile b/sunrpc/Makefile
index f64a554..636ee9d 100644
--- a/sunrpc/Makefile
+++ b/sunrpc/Makefile
@@ -170,7 +170,7 @@ $(cross-rpcgen-objs): $(objpfx)cross-%.o: %.c $(before-compile)
 $(objpfx)cross-rpcgen: $(cross-rpcgen-objs)
 	$(BUILD_CC) $^ $(BUILD_LDFLAGS) -o $@
 
-# This makes sure -DNOT_IN_libc is passed for all these modules.
+# This makes sure -DIN_MODULE is passed for all these modules.
 cpp-srcs-left := $(rpcgen-objs:.o=.c)
 lib := nonlib
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
diff --git a/sysdeps/arm/armv7/multiarch/memcpy.S b/sysdeps/arm/armv7/multiarch/memcpy.S
index c4f4e80..3439cb7 100644
--- a/sysdeps/arm/armv7/multiarch/memcpy.S
+++ b/sysdeps/arm/armv7/multiarch/memcpy.S
@@ -22,7 +22,7 @@
 #include <sysdep.h>
 #include <rtld-global-offsets.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 /* Under __ARM_NEON__, memcpy_neon.S defines the name memcpy.  */
 # ifndef __ARM_NEON__
 	.text
diff --git a/sysdeps/arm/memmove.S b/sysdeps/arm/memmove.S
index 04aa7db..488e156 100644
--- a/sysdeps/arm/memmove.S
+++ b/sysdeps/arm/memmove.S
@@ -69,7 +69,7 @@ ENTRY(memmove)
 
 		subs	ip, r0, r1
 		cmphi	r2, ip
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 		bls	memcpy
 #else
 		bls	HIDDEN_JUMPTARGET(memcpy)
diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h
index ebd6411..db09ed0 100644
--- a/sysdeps/arm/sysdep.h
+++ b/sysdeps/arm/sysdep.h
@@ -293,7 +293,7 @@
 
 /* Pointer mangling support.  */
 #if (IS_IN (rtld) || \
-     (!defined SHARED && (!defined NOT_IN_libc || IS_IN (libpthread))))
+     (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
 # ifdef __ASSEMBLER__
 #  define PTR_MANGLE_LOAD(guard, tmp)					\
   LDST_PCREL(ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local));
diff --git a/sysdeps/generic/_itoa.h b/sysdeps/generic/_itoa.h
index 8360baf..ed84e56 100644
--- a/sysdeps/generic/_itoa.h
+++ b/sysdeps/generic/_itoa.h
@@ -46,12 +46,12 @@ extern char *_itoa (unsigned long long int value, char *buflim,
 
 extern const char _itoa_upper_digits[];
 extern const char _itoa_lower_digits[];
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 hidden_proto (_itoa_upper_digits)
 hidden_proto (_itoa_lower_digits)
 #endif
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 extern char *_itoa_word (_ITOA_WORD_TYPE value, char *buflim,
 			 unsigned int base, int upper_case);
 #else
diff --git a/sysdeps/generic/symbol-hacks.h b/sysdeps/generic/symbol-hacks.h
index 6bec24b..ce576c9 100644
--- a/sysdeps/generic/symbol-hacks.h
+++ b/sysdeps/generic/symbol-hacks.h
@@ -1,6 +1,6 @@
 /* Some compiler optimizations may transform loops into memset/memmove
    calls and without proper declaration it may generate PLT calls.  */
-#if !defined __ASSEMBLER__ && !defined NOT_IN_libc && defined SHARED
+#if !defined __ASSEMBLER__ && IS_IN (libc) && defined SHARED
 asm ("memmove = __GI_memmove");
 asm ("memset = __GI_memset");
 asm ("memcpy = __GI_memcpy");
diff --git a/sysdeps/gnu/Makefile b/sysdeps/gnu/Makefile
index b5b2cf0..ba495ed 100644
--- a/sysdeps/gnu/Makefile
+++ b/sysdeps/gnu/Makefile
@@ -40,7 +40,7 @@ $(objpfx)errlist-compat.c: $(errlist-c) $(..)sysdeps/gnu/errlist-compat.awk \
 endif
 	$(make-target-directory)
 	$(AWK) -v maxerr=`\
-	  $(CC) -S $(CPPFLAGS) $(CFLAGS) -DNOT_IN_libc -DEMIT_ERR_MAX $< -o - \
+	  $(CC) -S $(CPPFLAGS) $(CFLAGS) -DEMIT_ERR_MAX $< -o - \
 	  | sed -n 's/^.*@@@[^0-9]*\([0-9]*\)[^0-9]*@@@.*$$/\1/p'` \
 	       -f $(..)sysdeps/gnu/errlist-compat.awk \
 	       $(wildcard $(sysdirs:=/Versions)) > $@T
diff --git a/sysdeps/gnu/errlist.awk b/sysdeps/gnu/errlist.awk
index 7fa5305..6da844a 100644
--- a/sysdeps/gnu/errlist.awk
+++ b/sysdeps/gnu/errlist.awk
@@ -110,7 +110,7 @@ END {
   print "  (sizeof _sys_errlist_internal / sizeof _sys_errlist_internal [0])";
   print "const int _sys_nerr_internal = NERR;"
   print "";
-  print "#if !defined NOT_IN_libc && !defined ERRLIST_NO_COMPAT";
+  print "#if IS_IN (libc) && !defined ERRLIST_NO_COMPAT";
   print "# include <errlist-compat.c>";
   print "#endif";
   print "";
diff --git a/sysdeps/gnu/errlist.c b/sysdeps/gnu/errlist.c
index 8381434..a9a5960 100644
--- a/sysdeps/gnu/errlist.c
+++ b/sysdeps/gnu/errlist.c
@@ -1480,7 +1480,7 @@ TRANS error; @pxref{Cancel AIO Operations}. */
   (sizeof _sys_errlist_internal / sizeof _sys_errlist_internal [0])
 const int _sys_nerr_internal = NERR;
 
-#if !defined NOT_IN_libc && !defined ERRLIST_NO_COMPAT
+#if IS_IN (libc) && !defined ERRLIST_NO_COMPAT
 # include <errlist-compat.c>
 #endif
 
diff --git a/sysdeps/i386/i586/memcpy.S b/sysdeps/i386/i586/memcpy.S
index edd9f08..6e0cc4c 100644
--- a/sysdeps/i386/i586/memcpy.S
+++ b/sysdeps/i386/i586/memcpy.S
@@ -32,7 +32,7 @@
 #define LEN	SRC+4
 
         .text
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && IS_IN (libc)
 ENTRY (__memcpy_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i586/memset.S b/sysdeps/i386/i586/memset.S
index 910d7bb..50b498b 100644
--- a/sysdeps/i386/i586/memset.S
+++ b/sysdeps/i386/i586/memset.S
@@ -35,7 +35,7 @@
 #endif
 
         .text
-#if defined PIC && !defined NOT_IN_libc && !BZERO_P
+#if defined PIC && IS_IN (libc) && !BZERO_P
 ENTRY (__memset_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/memcpy.S b/sysdeps/i386/i686/memcpy.S
index 17e815e..6a15004 100644
--- a/sysdeps/i386/i686/memcpy.S
+++ b/sysdeps/i386/i686/memcpy.S
@@ -28,7 +28,7 @@
 #define LEN	SRC+4
 
 	.text
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && IS_IN (libc)
 ENTRY_CHK (__memcpy_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/memmove.S b/sysdeps/i386/i686/memmove.S
index 4b8785f..561f2fc 100644
--- a/sysdeps/i386/i686/memmove.S
+++ b/sysdeps/i386/i686/memmove.S
@@ -35,7 +35,7 @@
 # define SRC	DEST+4
 # define LEN	SRC+4
 
-# if defined PIC && !defined NOT_IN_libc
+# if defined PIC && IS_IN (libc)
 ENTRY_CHK (__memmove_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/mempcpy.S b/sysdeps/i386/i686/mempcpy.S
index ec4b42b..8e51a13 100644
--- a/sysdeps/i386/i686/mempcpy.S
+++ b/sysdeps/i386/i686/mempcpy.S
@@ -28,7 +28,7 @@
 #define LEN	SRC+4
 
 	.text
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && IS_IN (libc)
 ENTRY_CHK (__mempcpy_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/memset.S b/sysdeps/i386/i686/memset.S
index 72d21fa..877bdda 100644
--- a/sysdeps/i386/i686/memset.S
+++ b/sysdeps/i386/i686/memset.S
@@ -36,7 +36,7 @@
 #endif
 
         .text
-#if defined PIC && !defined NOT_IN_libc && !BZERO_P
+#if defined PIC && IS_IN (libc) && !BZERO_P
 ENTRY_CHK (__memset_chk)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
@@ -99,7 +99,7 @@ ENTRY (memset)
 END (memset)
 libc_hidden_builtin_def (memset)
 
-#if defined PIC && !defined NOT_IN_libc && !BZERO_P
+#if defined PIC && IS_IN (libc) && !BZERO_P
 strong_alias (__memset_chk, __memset_zero_constant_len_parameter)
 	.section .gnu.warning.__memset_zero_constant_len_parameter
 	.string "memset used with constant zero length parameter; this could be due to transposed parameters"
diff --git a/sysdeps/i386/i686/multiarch/bcopy.S b/sysdeps/i386/i686/multiarch/bcopy.S
index 4f50035..a0fca88 100644
--- a/sysdeps/i386/i686/multiarch/bcopy.S
+++ b/sysdeps/i386/i686/multiarch/bcopy.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(bcopy)
diff --git a/sysdeps/i386/i686/multiarch/bzero.S b/sysdeps/i386/i686/multiarch/bzero.S
index cd59940..2dc1d8a 100644
--- a/sysdeps/i386/i686/multiarch/bzero.S
+++ b/sysdeps/i386/i686/multiarch/bzero.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__bzero)
diff --git a/sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S b/sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S
index 8f5ccca..a0083a3 100644
--- a/sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S
+++ b/sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/memchr-sse2.S b/sysdeps/i386/i686/multiarch/memchr-sse2.S
index 8d2c159..59a8a7c 100644
--- a/sysdeps/i386/i686/multiarch/memchr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/memchr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/memchr.S b/sysdeps/i386/i686/multiarch/memchr.S
index 1bdf0e7..b2a22f3 100644
--- a/sysdeps/i386/i686/multiarch/memchr.S
+++ b/sysdeps/i386/i686/multiarch/memchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 # define CFI_POP(REG) \
 	cfi_adjust_cfa_offset (-4); \
 	cfi_restore (REG)
diff --git a/sysdeps/i386/i686/multiarch/memcmp-sse4.S b/sysdeps/i386/i686/multiarch/memcmp-sse4.S
index a238615..570fec0 100644
--- a/sysdeps/i386/i686/multiarch/memcmp-sse4.S
+++ b/sysdeps/i386/i686/multiarch/memcmp-sse4.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/memcmp-ssse3.S b/sysdeps/i386/i686/multiarch/memcmp-ssse3.S
index 4a0bd67..5463428 100644
--- a/sysdeps/i386/i686/multiarch/memcmp-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/memcmp-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/memcmp.S b/sysdeps/i386/i686/multiarch/memcmp.S
index e4d56fa..1c5e30c 100644
--- a/sysdeps/i386/i686/multiarch/memcmp.S
+++ b/sysdeps/i386/i686/multiarch/memcmp.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(memcmp)
diff --git a/sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S b/sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S
index c4cdcfd..a7a8f98 100644
--- a/sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S
+++ b/sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S
@@ -19,7 +19,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc \
+#if IS_IN (libc) \
     && (defined SHARED \
 	|| defined USE_AS_MEMMOVE \
 	|| !defined USE_MULTIARCH)
diff --git a/sysdeps/i386/i686/multiarch/memcpy-ssse3.S b/sysdeps/i386/i686/multiarch/memcpy-ssse3.S
index c0d718b..d190ba0 100644
--- a/sysdeps/i386/i686/multiarch/memcpy-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/memcpy-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if !defined NOT_IN_libc \
+#if IS_IN (libc) \
     && (defined SHARED \
 	|| defined USE_AS_MEMMOVE \
 	|| !defined USE_MULTIARCH)
diff --git a/sysdeps/i386/i686/multiarch/memcpy.S b/sysdeps/i386/i686/multiarch/memcpy.S
index f583482..76195a5 100644
--- a/sysdeps/i386/i686/multiarch/memcpy.S
+++ b/sysdeps/i386/i686/multiarch/memcpy.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need memcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 	.text
 ENTRY(memcpy)
 	.type	memcpy, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/memcpy_chk.S b/sysdeps/i386/i686/multiarch/memcpy_chk.S
index bf93b68..c67968e 100644
--- a/sysdeps/i386/i686/multiarch/memcpy_chk.S
+++ b/sysdeps/i386/i686/multiarch/memcpy_chk.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  There are no multiarch memcpy functions for static binaries.
  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__memcpy_chk)
diff --git a/sysdeps/i386/i686/multiarch/memmove.S b/sysdeps/i386/i686/multiarch/memmove.S
index 90cf167..d8de7c6 100644
--- a/sysdeps/i386/i686/multiarch/memmove.S
+++ b/sysdeps/i386/i686/multiarch/memmove.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(memmove)
diff --git a/sysdeps/i386/i686/multiarch/memmove_chk.S b/sysdeps/i386/i686/multiarch/memmove_chk.S
index 182aeb3..3442ce1 100644
--- a/sysdeps/i386/i686/multiarch/memmove_chk.S
+++ b/sysdeps/i386/i686/multiarch/memmove_chk.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__memmove_chk)
diff --git a/sysdeps/i386/i686/multiarch/mempcpy.S b/sysdeps/i386/i686/multiarch/mempcpy.S
index 56b50bb..3aab63d 100644
--- a/sysdeps/i386/i686/multiarch/mempcpy.S
+++ b/sysdeps/i386/i686/multiarch/mempcpy.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need mempcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 	.text
 ENTRY(__mempcpy)
 	.type	__mempcpy, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/mempcpy_chk.S b/sysdeps/i386/i686/multiarch/mempcpy_chk.S
index a76341c..5d81f4e 100644
--- a/sysdeps/i386/i686/multiarch/mempcpy_chk.S
+++ b/sysdeps/i386/i686/multiarch/mempcpy_chk.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  There are no multiarch mempcpy functions for static binaries.
  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__mempcpy_chk)
diff --git a/sysdeps/i386/i686/multiarch/memrchr-c.c b/sysdeps/i386/i686/multiarch/memrchr-c.c
index 44ec1a6..ef7bbbe 100644
--- a/sysdeps/i386/i686/multiarch/memrchr-c.c
+++ b/sysdeps/i386/i686/multiarch/memrchr-c.c
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define MEMRCHR  __memrchr_ia32
 # include <string.h>
 extern void *__memrchr_ia32 (const void *, int, size_t);
diff --git a/sysdeps/i386/i686/multiarch/memrchr-sse2-bsf.S b/sysdeps/i386/i686/multiarch/memrchr-sse2-bsf.S
index 303ef9d..bc62775 100644
--- a/sysdeps/i386/i686/multiarch/memrchr-sse2-bsf.S
+++ b/sysdeps/i386/i686/multiarch/memrchr-sse2-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/memrchr-sse2.S b/sysdeps/i386/i686/multiarch/memrchr-sse2.S
index 90ba738..ef605d1 100644
--- a/sysdeps/i386/i686/multiarch/memrchr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/memrchr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 # define CFI_PUSH(REG)	\
diff --git a/sysdeps/i386/i686/multiarch/memrchr.S b/sysdeps/i386/i686/multiarch/memrchr.S
index 0dff8b6..5ffcc26 100644
--- a/sysdeps/i386/i686/multiarch/memrchr.S
+++ b/sysdeps/i386/i686/multiarch/memrchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 # define CFI_POP(REG) \
 	cfi_adjust_cfa_offset (-4); \
 	cfi_restore (REG)
diff --git a/sysdeps/i386/i686/multiarch/memset-sse2-rep.S b/sysdeps/i386/i686/multiarch/memset-sse2-rep.S
index 8655a8c..2a064a1 100644
--- a/sysdeps/i386/i686/multiarch/memset-sse2-rep.S
+++ b/sysdeps/i386/i686/multiarch/memset-sse2-rep.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #include <sysdep.h>
 #include "asm-syntax.h"
@@ -79,7 +79,7 @@
 #endif
 
 	.section .text.sse2,"ax",@progbits
-#if defined SHARED && !defined NOT_IN_libc && !defined USE_AS_BZERO
+#if defined SHARED && IS_IN (libc) && !defined USE_AS_BZERO
 ENTRY (__memset_chk_sse2_rep)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/multiarch/memset-sse2.S b/sysdeps/i386/i686/multiarch/memset-sse2.S
index cd94e4e..a48f9fa 100644
--- a/sysdeps/i386/i686/multiarch/memset-sse2.S
+++ b/sysdeps/i386/i686/multiarch/memset-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #include <sysdep.h>
 #include "asm-syntax.h"
@@ -79,7 +79,7 @@
 #endif
 
 	.section .text.sse2,"ax",@progbits
-#if defined SHARED && !defined NOT_IN_libc && !defined USE_AS_BZERO
+#if defined SHARED && IS_IN (libc) && !defined USE_AS_BZERO
 ENTRY (__memset_chk_sse2)
 	movl	12(%esp), %eax
 	cmpl	%eax, 16(%esp)
diff --git a/sysdeps/i386/i686/multiarch/memset.S b/sysdeps/i386/i686/multiarch/memset.S
index ecec1ea..c818002 100644
--- a/sysdeps/i386/i686/multiarch/memset.S
+++ b/sysdeps/i386/i686/multiarch/memset.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(memset)
diff --git a/sysdeps/i386/i686/multiarch/memset_chk.S b/sysdeps/i386/i686/multiarch/memset_chk.S
index 92c6099..f980520 100644
--- a/sysdeps/i386/i686/multiarch/memset_chk.S
+++ b/sysdeps/i386/i686/multiarch/memset_chk.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__memset_chk)
diff --git a/sysdeps/i386/i686/multiarch/rawmemchr.S b/sysdeps/i386/i686/multiarch/rawmemchr.S
index 01850cf..db4d461 100644
--- a/sysdeps/i386/i686/multiarch/rawmemchr.S
+++ b/sysdeps/i386/i686/multiarch/rawmemchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 # define CFI_POP(REG) \
 	cfi_adjust_cfa_offset (-4); \
 	cfi_restore (REG)
diff --git a/sysdeps/i386/i686/multiarch/strcat-sse2.S b/sysdeps/i386/i686/multiarch/strcat-sse2.S
index efd3f67..ae82e9a 100644
--- a/sysdeps/i386/i686/multiarch/strcat-sse2.S
+++ b/sysdeps/i386/i686/multiarch/strcat-sse2.S
@@ -18,7 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strcat-ssse3.S b/sysdeps/i386/i686/multiarch/strcat-ssse3.S
index 8527166..0c506c1 100644
--- a/sysdeps/i386/i686/multiarch/strcat-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/strcat-ssse3.S
@@ -18,7 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strcat.S b/sysdeps/i386/i686/multiarch/strcat.S
index 598c3f0..267ad13 100644
--- a/sysdeps/i386/i686/multiarch/strcat.S
+++ b/sysdeps/i386/i686/multiarch/strcat.S
@@ -43,7 +43,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strncat in static library since we
    need strncat before the initialization happened.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # ifdef SHARED
 	.text
diff --git a/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S b/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S
index 3357f53..9ab6c82 100644
--- a/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S
+++ b/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strchr-sse2.S b/sysdeps/i386/i686/multiarch/strchr-sse2.S
index e0f3a2e..37867af 100644
--- a/sysdeps/i386/i686/multiarch/strchr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/strchr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strchr.S b/sysdeps/i386/i686/multiarch/strchr.S
index 0fc4d8c..cc0ab9d 100644
--- a/sysdeps/i386/i686/multiarch/strchr.S
+++ b/sysdeps/i386/i686/multiarch/strchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(strchr)
 	.type	strchr, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/strcmp-sse4.S b/sysdeps/i386/i686/multiarch/strcmp-sse4.S
index 42d308a..ad15aa8 100644
--- a/sysdeps/i386/i686/multiarch/strcmp-sse4.S
+++ b/sysdeps/i386/i686/multiarch/strcmp-sse4.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #include <sysdep.h>
 #include "asm-syntax.h"
diff --git a/sysdeps/i386/i686/multiarch/strcmp-ssse3.S b/sysdeps/i386/i686/multiarch/strcmp-ssse3.S
index c3107e5..1b32a8d 100644
--- a/sysdeps/i386/i686/multiarch/strcmp-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/strcmp-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #include <sysdep.h>
 #include "asm-syntax.h"
diff --git a/sysdeps/i386/i686/multiarch/strcmp.S b/sysdeps/i386/i686/multiarch/strcmp.S
index 2ad6bf4..6449202 100644
--- a/sysdeps/i386/i686/multiarch/strcmp.S
+++ b/sysdeps/i386/i686/multiarch/strcmp.S
@@ -50,7 +50,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strncmp in static library since we
    need strncmp before the initialization happened.  */
-#if (defined SHARED || !defined USE_AS_STRNCMP) && !defined NOT_IN_libc
+#if (defined SHARED || !defined USE_AS_STRNCMP) && IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(STRCMP)
diff --git a/sysdeps/i386/i686/multiarch/strcpy-sse2.S b/sysdeps/i386/i686/multiarch/strcpy-sse2.S
index cbe040c..640fd06 100644
--- a/sysdeps/i386/i686/multiarch/strcpy-sse2.S
+++ b/sysdeps/i386/i686/multiarch/strcpy-sse2.S
@@ -18,7 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strcpy-ssse3.S b/sysdeps/i386/i686/multiarch/strcpy-ssse3.S
index 2d67994..ad3f7fa 100644
--- a/sysdeps/i386/i686/multiarch/strcpy-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/strcpy-ssse3.S
@@ -18,7 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # ifndef USE_AS_STRCAT
 #  include <sysdep.h>
diff --git a/sysdeps/i386/i686/multiarch/strcpy.S b/sysdeps/i386/i686/multiarch/strcpy.S
index f44ddf7..54e5b24 100644
--- a/sysdeps/i386/i686/multiarch/strcpy.S
+++ b/sysdeps/i386/i686/multiarch/strcpy.S
@@ -59,7 +59,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strncpy in static library since we
    need strncpy before the initialization happened.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # ifdef SHARED
 	.text
diff --git a/sysdeps/i386/i686/multiarch/strcspn.S b/sysdeps/i386/i686/multiarch/strcspn.S
index c35f4bf..d60874b 100644
--- a/sysdeps/i386/i686/multiarch/strcspn.S
+++ b/sysdeps/i386/i686/multiarch/strcspn.S
@@ -41,7 +41,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strpbrk in static library since we
    need strpbrk before the initialization happened.  */
-#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc
+#if (defined SHARED || !defined USE_AS_STRPBRK) && IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(STRCSPN)
diff --git a/sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S b/sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S
index 8f9b149..7617946 100644
--- a/sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S
+++ b/sysdeps/i386/i686/multiarch/strlen-sse2-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 
 #include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strlen-sse2.S b/sysdeps/i386/i686/multiarch/strlen-sse2.S
index 20e82a6..b2f8973 100644
--- a/sysdeps/i386/i686/multiarch/strlen-sse2.S
+++ b/sysdeps/i386/i686/multiarch/strlen-sse2.S
@@ -19,7 +19,7 @@
 
 /* for strlen only SHARED version is optimized, for strcat, strncat, strnlen both STATIC and SHARED are optimized */
 
-#if (defined USE_AS_STRNLEN || defined USE_AS_STRCAT || defined SHARED) && !defined NOT_IN_libc
+#if (defined USE_AS_STRNLEN || defined USE_AS_STRCAT || defined SHARED) && IS_IN (libc)
 
 # ifndef USE_AS_STRCAT
 
diff --git a/sysdeps/i386/i686/multiarch/strlen.S b/sysdeps/i386/i686/multiarch/strlen.S
index 5b262a2..6d4eb68 100644
--- a/sysdeps/i386/i686/multiarch/strlen.S
+++ b/sysdeps/i386/i686/multiarch/strlen.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in libc and for the
    DSO.  In static binaries, we need strlen before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 	.text
 ENTRY(strlen)
 	.type	strlen, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/strnlen.S b/sysdeps/i386/i686/multiarch/strnlen.S
index 63357d7..73854d5 100644
--- a/sysdeps/i386/i686/multiarch/strnlen.S
+++ b/sysdeps/i386/i686/multiarch/strnlen.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(__strnlen)
 	.type	__strnlen, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/strrchr-sse2-bsf.S b/sysdeps/i386/i686/multiarch/strrchr-sse2-bsf.S
index 622b9f2..09724b5 100644
--- a/sysdeps/i386/i686/multiarch/strrchr-sse2-bsf.S
+++ b/sysdeps/i386/i686/multiarch/strrchr-sse2-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strrchr-sse2.S b/sysdeps/i386/i686/multiarch/strrchr-sse2.S
index 1644d5d..6cfb9a3 100644
--- a/sysdeps/i386/i686/multiarch/strrchr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/strrchr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/strrchr.S b/sysdeps/i386/i686/multiarch/strrchr.S
index 323f3f4..24c0493 100644
--- a/sysdeps/i386/i686/multiarch/strrchr.S
+++ b/sysdeps/i386/i686/multiarch/strrchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(strrchr)
 	.type	strrchr, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/strspn.S b/sysdeps/i386/i686/multiarch/strspn.S
index 703fc17..e55e224 100644
--- a/sysdeps/i386/i686/multiarch/strspn.S
+++ b/sysdeps/i386/i686/multiarch/strspn.S
@@ -26,7 +26,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(strspn)
diff --git a/sysdeps/i386/i686/multiarch/wcschr-c.c b/sysdeps/i386/i686/multiarch/wcschr-c.c
index c23af26..4c5f0f6 100644
--- a/sysdeps/i386/i686/multiarch/wcschr-c.c
+++ b/sysdeps/i386/i686/multiarch/wcschr-c.c
@@ -1,6 +1,6 @@
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 #  undef libc_hidden_def
 #  define libc_hidden_def(name) \
diff --git a/sysdeps/i386/i686/multiarch/wcschr-sse2.S b/sysdeps/i386/i686/multiarch/wcschr-sse2.S
index 332bdb0..f0294bc 100644
--- a/sysdeps/i386/i686/multiarch/wcschr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/wcschr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <sysdep.h>
 
 # define CFI_PUSH(REG)	\
diff --git a/sysdeps/i386/i686/multiarch/wcschr.S b/sysdeps/i386/i686/multiarch/wcschr.S
index 7622085..9a80a33 100644
--- a/sysdeps/i386/i686/multiarch/wcschr.S
+++ b/sysdeps/i386/i686/multiarch/wcschr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wcschr)
 	.type	wcschr, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/wcscmp-sse2.S b/sysdeps/i386/i686/multiarch/wcscmp-sse2.S
index 926bdcf..6e273d2 100644
--- a/sysdeps/i386/i686/multiarch/wcscmp-sse2.S
+++ b/sysdeps/i386/i686/multiarch/wcscmp-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/i386/i686/multiarch/wcscmp.S b/sysdeps/i386/i686/multiarch/wcscmp.S
index 37dd07f..ed36d6b 100644
--- a/sysdeps/i386/i686/multiarch/wcscmp.S
+++ b/sysdeps/i386/i686/multiarch/wcscmp.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in libc and for the
    DSO.  In static binaries, we need wcscmp before the initialization
    happened.  */
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wcscmp)
 	.type	wcscmp, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/wcscpy-c.c b/sysdeps/i386/i686/multiarch/wcscpy-c.c
index a3c4024..fb30003 100644
--- a/sysdeps/i386/i686/multiarch/wcscpy-c.c
+++ b/sysdeps/i386/i686/multiarch/wcscpy-c.c
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define wcscpy  __wcscpy_ia32
 #endif
 
diff --git a/sysdeps/i386/i686/multiarch/wcscpy-ssse3.S b/sysdeps/i386/i686/multiarch/wcscpy-ssse3.S
index f404252..8b2f910 100644
--- a/sysdeps/i386/i686/multiarch/wcscpy-ssse3.S
+++ b/sysdeps/i386/i686/multiarch/wcscpy-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <sysdep.h>
 
 # define CFI_PUSH(REG)	\
diff --git a/sysdeps/i386/i686/multiarch/wcscpy.S b/sysdeps/i386/i686/multiarch/wcscpy.S
index 54a4325..b87500c 100644
--- a/sysdeps/i386/i686/multiarch/wcscpy.S
+++ b/sysdeps/i386/i686/multiarch/wcscpy.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wcscpy)
 	.type	wcscpy, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/wcslen-c.c b/sysdeps/i386/i686/multiarch/wcslen-c.c
index 8cebfea..a335dc0 100644
--- a/sysdeps/i386/i686/multiarch/wcslen-c.c
+++ b/sysdeps/i386/i686/multiarch/wcslen-c.c
@@ -1,6 +1,6 @@
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define WCSLEN  __wcslen_ia32
 #endif
 
diff --git a/sysdeps/i386/i686/multiarch/wcslen-sse2.S b/sysdeps/i386/i686/multiarch/wcslen-sse2.S
index 8e94545..70b73b4 100644
--- a/sysdeps/i386/i686/multiarch/wcslen-sse2.S
+++ b/sysdeps/i386/i686/multiarch/wcslen-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <sysdep.h>
 # define STR	4
 
diff --git a/sysdeps/i386/i686/multiarch/wcslen.S b/sysdeps/i386/i686/multiarch/wcslen.S
index ba97cc4..d42a419 100644
--- a/sysdeps/i386/i686/multiarch/wcslen.S
+++ b/sysdeps/i386/i686/multiarch/wcslen.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(__wcslen)
 	.type	__wcslen, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/wcsrchr-c.c b/sysdeps/i386/i686/multiarch/wcsrchr-c.c
index c7444ce..8d8a335 100644
--- a/sysdeps/i386/i686/multiarch/wcsrchr-c.c
+++ b/sysdeps/i386/i686/multiarch/wcsrchr-c.c
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define wcsrchr  __wcsrchr_ia32
 #endif
 
diff --git a/sysdeps/i386/i686/multiarch/wcsrchr-sse2.S b/sysdeps/i386/i686/multiarch/wcsrchr-sse2.S
index f6abd6b..0e1b291 100644
--- a/sysdeps/i386/i686/multiarch/wcsrchr-sse2.S
+++ b/sysdeps/i386/i686/multiarch/wcsrchr-sse2.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <sysdep.h>
 # define CFI_PUSH(REG)	\
 	cfi_adjust_cfa_offset (4);	\
diff --git a/sysdeps/i386/i686/multiarch/wcsrchr.S b/sysdeps/i386/i686/multiarch/wcsrchr.S
index 4d80b54..3ab1735 100644
--- a/sysdeps/i386/i686/multiarch/wcsrchr.S
+++ b/sysdeps/i386/i686/multiarch/wcsrchr.S
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 #include <init-arch.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wcsrchr)
 	.type	wcsrchr, @gnu_indirect_function
diff --git a/sysdeps/i386/i686/multiarch/wmemcmp-c.c b/sysdeps/i386/i686/multiarch/wmemcmp-c.c
index bd37660..75ab4b9 100644
--- a/sysdeps/i386/i686/multiarch/wmemcmp-c.c
+++ b/sysdeps/i386/i686/multiarch/wmemcmp-c.c
@@ -1,6 +1,6 @@
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define WMEMCMP  __wmemcmp_ia32
 #endif
 
diff --git a/sysdeps/i386/i686/multiarch/wmemcmp.S b/sysdeps/i386/i686/multiarch/wmemcmp.S
index 1b5a211..6790fa4 100644
--- a/sysdeps/i386/i686/multiarch/wmemcmp.S
+++ b/sysdeps/i386/i686/multiarch/wmemcmp.S
@@ -23,7 +23,7 @@
 
 /* Define multiple versions only for the definition in libc. */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wmemcmp)
 	.type	wmemcmp, @gnu_indirect_function
diff --git a/sysdeps/ia64/fpu/libm-symbols.h b/sysdeps/ia64/fpu/libm-symbols.h
index 0df8076..3cbc6c4 100644
--- a/sysdeps/ia64/fpu/libm-symbols.h
+++ b/sysdeps/ia64/fpu/libm-symbols.h
@@ -53,6 +53,6 @@
  ASM_SIZE_DIRECTIVE(__ieee754_##name);			\
  .type __ieee754_##name, @function
 
-#if defined ASSEMBLER && !defined NOT_IN_libc
+#if defined ASSEMBLER && IS_IN (libc)
 # define __libm_error_support	HIDDEN_JUMPTARGET(__libm_error_support)
 #endif
diff --git a/sysdeps/nptl/bits/libc-lock.h b/sysdeps/nptl/bits/libc-lock.h
index b782b98..7500790 100644
--- a/sysdeps/nptl/bits/libc-lock.h
+++ b/sysdeps/nptl/bits/libc-lock.h
@@ -26,7 +26,7 @@
 
 /* Mutex type.  */
 #if defined _LIBC || defined _IO_MTSAFE_IO
-# if (defined NOT_IN_libc && !IS_IN (libpthread)) || !defined _LIBC
+# if (!IS_IN (libc) && !IS_IN (libpthread)) || !defined _LIBC
 typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t;
 # else
 typedef struct { int lock; int cnt; void *owner; } __libc_lock_recursive_t;
@@ -47,7 +47,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 
 /* Define an initialized recursive lock variable NAME with storage
    class CLASS.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 # define __libc_lock_define_initialized_recursive(CLASS, NAME) \
   CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
 # define _LIBC_LOCK_RECURSIVE_INITIALIZER \
@@ -60,7 +60,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 #endif
 
 /* Initialize a recursive mutex.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 # define __libc_lock_init_recursive(NAME) \
   ((NAME) = (__libc_lock_recursive_t) _LIBC_LOCK_RECURSIVE_INITIALIZER, 0)
 #else
@@ -78,7 +78,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 #endif
 
 /* Finalize recursive named lock.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 # define __libc_lock_fini_recursive(NAME) ((void) 0)
 #else
 # define __libc_lock_fini_recursive(NAME) \
@@ -86,7 +86,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 #endif
 
 /* Lock the recursive named lock variable.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 # define __libc_lock_lock_recursive(NAME) \
   do {									      \
     void *self = THREAD_SELF;						      \
@@ -103,7 +103,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 #endif
 
 /* Try to lock the recursive named lock variable.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 # define __libc_lock_trylock_recursive(NAME) \
   ({									      \
     int result = 0;							      \
@@ -128,7 +128,7 @@ typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
 #endif
 
 /* Unlock the recursive named lock variable.  */
-#if defined _LIBC && (!defined NOT_IN_libc || IS_IN (libpthread))
+#if defined _LIBC && (IS_IN (libc) || IS_IN (libpthread))
 /* We do no error checking here.  */
 # define __libc_lock_unlock_recursive(NAME) \
   do {									      \
diff --git a/sysdeps/nptl/bits/libc-lockP.h b/sysdeps/nptl/bits/libc-lockP.h
index c84e778..f6495b6 100644
--- a/sysdeps/nptl/bits/libc-lockP.h
+++ b/sysdeps/nptl/bits/libc-lockP.h
@@ -35,7 +35,7 @@
 #include <pthread-functions.h>
 
 /* Mutex type.  */
-#if defined NOT_IN_libc && !IS_IN (libpthread)
+#if !IS_IN (libc) && !IS_IN (libpthread)
 typedef pthread_mutex_t __libc_lock_t;
 #else
 typedef int __libc_lock_t;
@@ -69,7 +69,7 @@ typedef pthread_key_t __libc_key_t;
    initialized locks must be set to one due to the lack of normal
    atomic operations.) */
 
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # if LLL_LOCK_INITIALIZER == 0
 #  define __libc_lock_define_initialized(CLASS,NAME) \
   CLASS __libc_lock_t NAME;
@@ -108,7 +108,7 @@ typedef pthread_key_t __libc_key_t;
 #endif
 
 /* Call thread functions through the function pointer table.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # define PTFAVAIL(NAME) __libc_pthread_functions_init
 # define __libc_ptf_call(FUNC, ARGS, ELSE) \
   (__libc_pthread_functions_init ? PTHFCT_CALL (ptr_##FUNC, ARGS) : ELSE)
@@ -125,13 +125,13 @@ typedef pthread_key_t __libc_key_t;
 
 /* Initialize the named lock variable, leaving it in a consistent, unlocked
    state.  */
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # define __libc_lock_init(NAME) ((NAME) = LLL_LOCK_INITIALIZER, 0)
 #else
 # define __libc_lock_init(NAME) \
   __libc_maybe_call (__pthread_mutex_init, (&(NAME), NULL), 0)
 #endif
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* ((NAME) = (__libc_rwlock_t) PTHREAD_RWLOCK_INITIALIZER, 0) is
    inefficient.  */
 # define __libc_rwlock_init(NAME) \
@@ -144,13 +144,13 @@ typedef pthread_key_t __libc_key_t;
 /* Finalize the named lock variable, which must be locked.  It cannot be
    used again until __libc_lock_init is called again on it.  This must be
    called on a lock variable before the containing storage is reused.  */
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # define __libc_lock_fini(NAME) ((void) 0)
 #else
 # define __libc_lock_fini(NAME) \
   __libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0)
 #endif
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # define __libc_rwlock_fini(NAME) ((void) 0)
 #else
 # define __libc_rwlock_fini(NAME) \
@@ -158,7 +158,7 @@ typedef pthread_key_t __libc_key_t;
 #endif
 
 /* Lock the named lock variable.  */
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # ifndef __libc_lock_lock
 #  define __libc_lock_lock(NAME) \
   ({ lll_lock (NAME, LLL_PRIVATE); 0; })
@@ -174,7 +174,7 @@ typedef pthread_key_t __libc_key_t;
   __libc_ptf_call (__pthread_rwlock_wrlock, (&(NAME)), 0)
 
 /* Try to lock the named lock variable.  */
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # ifndef __libc_lock_trylock
 #  define __libc_lock_trylock(NAME) \
   lll_trylock (NAME)
@@ -193,7 +193,7 @@ typedef pthread_key_t __libc_key_t;
   __libc_maybe_call (__pthread_mutex_trylock, (&(NAME).mutex), 0)
 
 /* Unlock the named lock variable.  */
-#if !defined NOT_IN_libc || IS_IN (libpthread)
+#if IS_IN (libc) || IS_IN (libpthread)
 # define __libc_lock_unlock(NAME) \
   lll_unlock (NAME, LLL_PRIVATE)
 #else
diff --git a/sysdeps/nptl/bits/stdio-lock.h b/sysdeps/nptl/bits/stdio-lock.h
index e2678cc..da392ed 100644
--- a/sysdeps/nptl/bits/stdio-lock.h
+++ b/sysdeps/nptl/bits/stdio-lock.h
@@ -84,7 +84,7 @@ typedef struct { int lock; int cnt; void *owner; } _IO_lock_t;
 #define _IO_cleanup_region_end(_doit) \
   __libc_cleanup_region_end (_doit)
 
-#if defined _LIBC && !defined NOT_IN_libc
+#if defined _LIBC && IS_IN (libc)
 
 # ifdef __EXCEPTIONS
 #  define _IO_acquire_lock(_fp) \
diff --git a/sysdeps/posix/closedir.c b/sysdeps/posix/closedir.c
index 24ba1a5..0b57a0d 100644
--- a/sysdeps/posix/closedir.c
+++ b/sysdeps/posix/closedir.c
@@ -43,7 +43,7 @@ __closedir (DIR *dirp)
 
   fd = dirp->fd;
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_fini (dirp->lock);
 #endif
 
diff --git a/sysdeps/posix/opendir.c b/sysdeps/posix/opendir.c
index be234bd..1ae5c0d 100644
--- a/sysdeps/posix/opendir.c
+++ b/sysdeps/posix/opendir.c
@@ -224,7 +224,7 @@ __alloc_dir (int fd, bool close_fd, int flags, const struct stat64 *statp)
     }
 
   dirp->fd = fd;
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_init (dirp->lock);
 #endif
   dirp->allocation = allocation;
diff --git a/sysdeps/posix/readdir.c b/sysdeps/posix/readdir.c
index 7bb956a..84d7f6a 100644
--- a/sysdeps/posix/readdir.c
+++ b/sysdeps/posix/readdir.c
@@ -40,7 +40,7 @@ __READDIR (DIR *dirp)
   DIRENT_TYPE *dp;
   int saved_errno = errno;
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_lock (dirp->lock);
 #endif
 
@@ -110,7 +110,7 @@ __READDIR (DIR *dirp)
       /* Skip deleted files.  */
     } while (dp->d_ino == 0);
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_unlock (dirp->lock);
 #endif
 
diff --git a/sysdeps/posix/rewinddir.c b/sysdeps/posix/rewinddir.c
index 5a4a715..a86c4cc 100644
--- a/sysdeps/posix/rewinddir.c
+++ b/sysdeps/posix/rewinddir.c
@@ -26,7 +26,7 @@ void
 rewinddir (dirp)
      DIR *dirp;
 {
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_lock (dirp->lock);
 #endif
   (void) __lseek (dirp->fd, (off_t) 0, SEEK_SET);
@@ -34,7 +34,7 @@ rewinddir (dirp)
   dirp->offset = 0;
   dirp->size = 0;
   dirp->errcode = 0;
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
   __libc_lock_unlock (dirp->lock);
 #endif
 }
diff --git a/sysdeps/powerpc/novmx-sigjmp.c b/sysdeps/powerpc/novmx-sigjmp.c
index c651f42..1f370bf 100644
--- a/sysdeps/powerpc/novmx-sigjmp.c
+++ b/sysdeps/powerpc/novmx-sigjmp.c
@@ -20,7 +20,7 @@
 
 #include <bits/wordsize.h>
 #include <shlib-compat.h>
-#if !defined NOT_IN_libc && defined SHARED
+#if IS_IN (libc) && defined SHARED
 # if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4)
 #  include <stddef.h>
 #  include <novmxsetjmp.h>
@@ -41,4 +41,4 @@ __novmx__sigjmp_save (__novmx__sigjmp_buf env, int savemask)
 }
 
 # endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4) */
-#endif /* !NOT_IN_libc && SHARED  */
+#endif /* IS_IN (libc) && SHARED  */
diff --git a/sysdeps/powerpc/powerpc32/__longjmp.S b/sysdeps/powerpc/powerpc32/__longjmp.S
index 3371176..9a83369 100644
--- a/sysdeps/powerpc/powerpc32/__longjmp.S
+++ b/sysdeps/powerpc/powerpc32/__longjmp.S
@@ -19,12 +19,12 @@
 #include <libc-symbols.h>
 #include <shlib-compat.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # define __longjmp_symbol __longjmp
 # include "__longjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 strong_alias (__vmx__longjmp, __longjmp);
 # define __longjmp_symbol  __vmx__longjmp
 # include "__longjmp-common.S"
@@ -36,4 +36,4 @@ strong_alias (__vmx__longjmp, __longjmp);
 #  define __longjmp_symbol  __novmx__longjmp
 #  include "__longjmp-common.S"
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc32/bsd-_setjmp.S b/sysdeps/powerpc/powerpc32/bsd-_setjmp.S
index 71b6c71..b952170 100644
--- a/sysdeps/powerpc/powerpc32/bsd-_setjmp.S
+++ b/sysdeps/powerpc/powerpc32/bsd-_setjmp.S
@@ -19,7 +19,7 @@
 #include <libc-symbols.h>
 #include <sysdep.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 ENTRY (_setjmp)
 	li r4,0			/* Set second argument to 0.  */
@@ -53,4 +53,4 @@ ENTRY (__vmx_setjmp)
 	b __vmx__sigsetjmp@local
 END (__vmx_setjmp)
 libc_hidden_def (__vmx_setjmp)
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc32/fpu/__longjmp.S b/sysdeps/powerpc/powerpc32/fpu/__longjmp.S
index 08bdd54..e68eb73 100644
--- a/sysdeps/powerpc/powerpc32/fpu/__longjmp.S
+++ b/sysdeps/powerpc/powerpc32/fpu/__longjmp.S
@@ -20,12 +20,12 @@
 #include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # define __longjmp_symbol __longjmp
 # include "__longjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 /* Build a versioned object for libc.  */
 versioned_symbol (libc, __vmx__longjmp, __longjmp, GLIBC_2_3_4);
 # define __longjmp_symbol  __vmx__longjmp
@@ -39,4 +39,4 @@ compat_symbol (libc, __novmx__longjmp, __longjmp, GLIBC_2_0);
 #  define __longjmp_symbol  __novmx__longjmp
 #  include "__longjmp-common.S"
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc32/fpu/setjmp.S b/sysdeps/powerpc/powerpc32/fpu/setjmp.S
index 333f707..169704f 100644
--- a/sysdeps/powerpc/powerpc32/fpu/setjmp.S
+++ b/sysdeps/powerpc/powerpc32/fpu/setjmp.S
@@ -20,13 +20,13 @@
 #include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # define __sigsetjmp_symbol __sigsetjmp
 # define __sigjmp_save_symbol __sigjmp_save
 # include "setjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 /* Build a versioned object for libc.  */
 versioned_symbol (libc, __vmx__sigsetjmp, __sigsetjmp, GLIBC_2_3_4)
 # define __sigsetjmp_symbol __vmx__sigsetjmp
@@ -43,4 +43,4 @@ compat_symbol (libc, __novmx__sigsetjmp, __sigsetjmp, GLIBC_2_0)
 #  define __sigjmp_save_symbol __novmx__sigjmp_save
 #  include "setjmp-common.S"
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c b/sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c
index baaa6b4..2b54622 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/bzero.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <strings.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c
index 94c22ef..d8c6d4d 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # undef memcpy
 /* Redefine memchr so that the compiler won't make the weak_alias point
    to internal hidden definition (__GI_memchr), since PPC32 does not
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S
index 3b473a3..03c7226 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .globl C_SYMBOL_NAME(__memcmp_ppc);				\
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c
index 79fec67..04ed027 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy-ppc32.S
index e525c2f..0f1f404 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy-ppc32.S
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy-ppc32.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .globl C_SYMBOL_NAME(__memcpy_ppc);				\
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy.c
index f263a38..70b5298 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcpy.c
@@ -19,7 +19,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need memcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memmove.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memmove.c
index 1070148..8b30143 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memmove.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memmove.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* Redefine memmove so that the compiler won't complain about the type
    mismatch with the IFUNC selector in strong_alias, below.  */
 # include <string.h>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c b/sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c
index 38fbcc3..0f811f0 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr-ppc32.c
index c30e7d6..435987a 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr-ppc32.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define MEMRCHR  __memrchr_ppc
 # include <string.h>
 extern void *__memrchr_ppc (const void *, int, size_t);
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr.c
index 610a957..353a186 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memrchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memset-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memset-ppc32.S
index a907eb1..6da001a 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memset-ppc32.S
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memset-ppc32.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .globl C_SYMBOL_NAME(__memset_ppc);				\
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memset.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memset.c
index e4e7982..eb1c0b1 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/memset.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memset.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/rawmemchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/rawmemchr.c
index 3f53cd5..063f12e 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/rawmemchr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/rawmemchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp.c
index 6d1edf9..f7ef822 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strcasecmp __strcasecmp_ppc
 
@@ -27,7 +27,7 @@ extern __typeof (__strcasecmp) __strcasecmp_power7 attribute_hidden;
 #include <string/strcasecmp.c>
 #undef strcasecmp
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp_l.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp_l.c
index 6359bf4..6291233 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp_l.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strcasecmp_l.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strcasecmp_l __strcasecmp_l_ppc
 
@@ -27,7 +27,7 @@ extern __typeof (__strcasecmp_l) __strcasecmp_l_power7 attribute_hidden;
 #include <string/strcasecmp_l.c>
 #undef strcasecmp_l
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strchr.c
index 74a9d54..99e4e45 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strchr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strchr.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strchrnul.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strchrnul.c
index dab1cbf..db0aab4 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strchrnul.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strchrnul.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S
index 3ee9f93..663d4fa 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 
 #include <sysdep.h>
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c
index 1b61ba0..cb81f5d 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncase.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strncase.c
index a2227d8..a5d4ab7 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncase.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strncase.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strncasecmp __strncasecmp_ppc
 extern __typeof (__strncasecmp) __strncasecmp_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strncasecmp) __strncasecmp_power7 attribute_hidden;
 #include <string/strncase.c>
 #undef strncasecmp
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncase_l.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strncase_l.c
index 9fe3aa0..65309b3 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncase_l.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strncase_l.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strncasecmp_l __strncasecmp_l_ppc
 extern __typeof (__strncasecmp_l) __strncasecmp_l_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strncasecmp_l) __strncasecmp_l_power7 attribute_hidden;
 #include <string/strncase_l.c>
 #undef strncasecmp_l
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S
index 9a857c7..f53ab94 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S
@@ -17,7 +17,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .globl C_SYMBOL_NAME(__strncmp_ppc);			\
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c
index a329f77..9faad6d 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c
index 62d4918..aca4c53 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
index a42f70c..9a067af 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
@@ -17,7 +17,7 @@
 
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 #   undef libc_hidden_def
 #   define libc_hidden_def(name)  \
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
index 216d2bc..6b8cd9c 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy-ppc32.c
index c135835..148913a 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy-ppc32.c
@@ -17,7 +17,7 @@
 
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define WCSCPY  __wcscpy_ppc
 #endif
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c
index 251660a..7c6edd8 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr-ppc32.c
index 9c7fe2d..7b7edfb 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr-ppc32.c
@@ -17,7 +17,7 @@
 
 #include <wchar.h>
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define WCSRCHR  __wcsrchr_ppc
 #endif
 
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr.c
index 42e2d8e..deec86f 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wordcopy.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wordcopy.c
index 889be25..54ca039 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wordcopy.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/wordcopy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <stddef.h>
 # include <memcopy.h>
 # include <shlib-compat.h>
diff --git a/sysdeps/powerpc/powerpc32/power6/memset.S b/sysdeps/powerpc/powerpc32/power6/memset.S
index 445fa44..811a7ef 100644
--- a/sysdeps/powerpc/powerpc32/power6/memset.S
+++ b/sysdeps/powerpc/powerpc32/power6/memset.S
@@ -228,7 +228,7 @@ L(nzCacheAligned128):
 	ori	r1,r1,0
         stw     rCHR,60(rMEMP3)
 	blt	cr6,L(cacheAligned1)
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	lfd	0,-128(rMEMP)
 #endif
 	b	L(nzCacheAligned256)
@@ -236,7 +236,7 @@ L(nzCacheAligned128):
 L(nzCacheAligned256):
 	cmplwi	cr1,rLEN,256
 	addi	rMEMP3,rMEMP,64
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 /* When we are not in libc we should use only GPRs to avoid the FPU lock
    interrupt.  */
 	stw	rCHR,0(rMEMP)
diff --git a/sysdeps/powerpc/powerpc32/setjmp.S b/sysdeps/powerpc/powerpc32/setjmp.S
index 9b587e0..c73e65c 100644
--- a/sysdeps/powerpc/powerpc32/setjmp.S
+++ b/sysdeps/powerpc/powerpc32/setjmp.S
@@ -19,13 +19,13 @@
 #include <shlib-compat.h>
 #include <libc-symbols.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # define __sigsetjmp_symbol __sigsetjmp
 # define __sigjmp_save_symbol __sigjmp_save
 # include "setjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 /* Build a versioned object for libc.  */
 versioned_symbol (libc, __vmx__sigsetjmp, __sigsetjmp, GLIBC_2_3_4)
 # define __sigsetjmp_symbol __vmx__sigsetjmp
@@ -42,4 +42,4 @@ compat_symbol (libc, __novmx__sigsetjmp, __sigsetjmp, GLIBC_2_0)
 #  define __sigjmp_save_symbol __novmx__sigjmp_save
 #  include "setjmp-common.S"
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc64/__longjmp.S b/sysdeps/powerpc/powerpc64/__longjmp.S
index 0f44681..9313eab 100644
--- a/sysdeps/powerpc/powerpc64/__longjmp.S
+++ b/sysdeps/powerpc/powerpc64/__longjmp.S
@@ -20,11 +20,11 @@
 #include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # include "__longjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 strong_alias (__vmx__longjmp, __longjmp)
 # define __longjmp  __vmx__longjmp
 # include "__longjmp-common.S"
@@ -36,4 +36,4 @@ strong_alias (__vmx__longjmp, __longjmp)
 #  define __longjmp  __novmx__longjmp
 #  include "__longjmp-common.S"
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero.c b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
index ed83541..aca4c25 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/bzero.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <strings.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memchr.c b/sysdeps/powerpc/powerpc64/multiarch/memchr.c
index ca0f714..1d763a6 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
index 1a39d4a..74626f5 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
@@ -22,7 +22,7 @@
 #define weak_alias(name, aliasname) \
   extern __typeof (__memcmp_ppc) aliasname \
     __attribute__ ((weak, alias ("__memcmp_ppc")));
-#if !defined(NOT_IN_libc) && defined(SHARED)
+#if IS_IN (libc) && defined(SHARED)
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(name) \
   __hidden_ver1(__memcmp_ppc, __GI_memcmp, __memcmp_ppc);
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp.c b/sysdeps/powerpc/powerpc64/multiarch/memcmp.c
index af90f0a..b0325de 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memcmp.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S
index c630654..8365c27 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcpy.c b/sysdeps/powerpc/powerpc64/multiarch/memcpy.c
index 305e963..22bca62 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memcpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memcpy.c
@@ -19,7 +19,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need memcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* Redefine memcpy so that the compiler won't complain about the type
    mismatch with the IFUNC selector in strong_alias, below.  */
 # undef memcpy
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memmove-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/memmove-ppc64.c
index ff78fe6..fab0312 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memmove-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memmove-ppc64.c
@@ -18,7 +18,7 @@
 #include <string.h>
 
 #define MEMMOVE __memmove_ppc
-#if !defined(NOT_IN_libc) && defined(SHARED)
+#if IS_IN (libc) && defined(SHARED)
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(name)
 #endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memmove.c b/sysdeps/powerpc/powerpc64/multiarch/memmove.c
index 9a1ce8f..20a3a9e 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memmove.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memmove.c
@@ -19,7 +19,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need memmove before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* Redefine memmove so that the compiler won't complain about the type
    mismatch with the IFUNC selector in strong_alias, below.  */
 # undef memmove
diff --git a/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c b/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
index 38fbcc3..0f811f0 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memrchr.c b/sysdeps/powerpc/powerpc64/multiarch/memrchr.c
index 610a957..353a186 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memrchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memrchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S
index 3601a77..ff88f48 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S
@@ -29,7 +29,7 @@ ENTRY (__bzero_ppc)
 END_GEN_TB (__bzero_ppc,TB_TOCLESS)
 
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset.c b/sysdeps/powerpc/powerpc64/multiarch/memset.c
index aa2ae70..3461e49 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memset.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* Redefine memset so that the compiler won't complain about the type
    mismatch with the IFUNC selector in strong_alias, below.  */
 # undef memset
diff --git a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c
index 3f53cd5..063f12e 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.S
index d80c82f..b2213a8 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/stpcpy.c b/sysdeps/powerpc/powerpc64/multiarch/stpcpy.c
index c7118d5..4e99eaf 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/stpcpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/stpcpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/stpncpy.c b/sysdeps/powerpc/powerpc64/multiarch/stpncpy.c
index dbf8521..5c3551b 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/stpncpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/stpncpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasecmp.c b/sysdeps/powerpc/powerpc64/multiarch/strcasecmp.c
index 7f02a25..3e440b5 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcasecmp.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcasecmp.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strcasecmp __strcasecmp_ppc
 extern __typeof (__strcasecmp) __strcasecmp_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strcasecmp) __strcasecmp_power7 attribute_hidden;
 #include <string/strcasecmp.c>
 #undef strcasecmp
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l.c b/sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l.c
index a3374c3..623d844 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strcasecmp_l __strcasecmp_l_ppc
 extern __typeof (__strcasecmp_l) __strcasecmp_l_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strcasecmp_l) __strcasecmp_l_power7 attribute_hidden;
 #include <string/strcasecmp_l.c>
 #undef strcasecmp_l
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcat.c b/sysdeps/powerpc/powerpc64/multiarch/strcat.c
index 847a62d..ec21062 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcat.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcat.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchr.c b/sysdeps/powerpc/powerpc64/multiarch/strchr.c
index 74a9d54..99e4e45 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchr.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
index dab1cbf..db0aab4 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S
index 93d1277..e65c11b 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcmp.c b/sysdeps/powerpc/powerpc64/multiarch/strcmp.c
index 2013301..4d72a4b 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcmp.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcmp.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcpy-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strcpy-ppc64.S
index 33a8b1c..fb38a3a 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcpy-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcpy-ppc64.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef EALIGN
 # define EALIGN(name, alignt, words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcpy.c b/sysdeps/powerpc/powerpc64/multiarch/strcpy.c
index 1b6e9e0..8efebcd 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcspn.c b/sysdeps/powerpc/powerpc64/multiarch/strcspn.c
index 3609d93..156fa6a 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strcspn.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcspn.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S
index a195e9a..c9bfed0 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # undef ENTRY
 # define ENTRY(name)						\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strlen.c b/sysdeps/powerpc/powerpc64/multiarch/strlen.c
index d2c26e9..bffb039 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strlen.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strlen.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 /* Redefine strlen so that the compiler won't complain about the type
    mismatch with the IFUNC selector in strong_alias, below.  */
 # undef strlen
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncase.c b/sysdeps/powerpc/powerpc64/multiarch/strncase.c
index 05eba7c..8956c70 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncase.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncase.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strncasecmp __strncasecmp_ppc
 extern __typeof (__strncasecmp) __strncasecmp_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strncasecmp) __strncasecmp_power7 attribute_hidden;
 #include <string/strncase.c>
 #undef strncasecmp
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncase_l.c b/sysdeps/powerpc/powerpc64/multiarch/strncase_l.c
index 4014269..1b4bc68 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncase_l.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncase_l.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # define strncasecmp_l __strncasecmp_l_ppc
 extern __typeof (__strncasecmp_l) __strncasecmp_l_ppc attribute_hidden;
@@ -26,7 +26,7 @@ extern __typeof (__strncasecmp_l) __strncasecmp_l_power7 attribute_hidden;
 #include <string/strncase_l.c>
 #undef strncasecmp_l
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncat.c b/sysdeps/powerpc/powerpc64/multiarch/strncat.c
index db98ec1..cdf8926 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncat.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncat.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
index 14a2bec..c404977 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
@@ -17,7 +17,7 @@
 
 #include <sysdep.h>
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 #undef EALIGN
 #define EALIGN(name,alignt,words)				\
   .section ".text";						\
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp.c b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
index 9829d69..7830eba 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncpy-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strncpy-ppc64.c
index e3111d2..79ae382 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncpy-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncpy-ppc64.c
@@ -22,7 +22,7 @@
 #define weak_alias(name, aliasname) \
   extern __typeof (__strncpy_ppc) aliasname \
     __attribute__ ((weak, alias ("__strncpy_ppc")));
-#if !defined(NOT_IN_libc) && defined(SHARED)
+#if IS_IN (libc) && defined(SHARED)
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(name) \
   __hidden_ver1(__strncpy_ppc, __GI_strncpy, __strncpy_ppc);
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncpy.c b/sysdeps/powerpc/powerpc64/multiarch/strncpy.c
index 8fd5e4b..771b731 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncpy.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/ >.  */
 
 /* Define multiple versions only for definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strnlen.c b/sysdeps/powerpc/powerpc64/multiarch/strnlen.c
index 3926031..02b654f 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strnlen.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strnlen.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c b/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c
index 8b05536..47ab6d3 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c
index 5633a9f..ef7cc65 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c
@@ -22,7 +22,7 @@
 #define weak_alias(name, aliasname) \
   extern __typeof (__strrchr_ppc) aliasname \
     __attribute__ ((weak, alias ("__strrchr_ppc")));
-#if !defined(NOT_IN_libc) && defined(SHARED)
+#if IS_IN (libc) && defined(SHARED)
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(name) \
   __hidden_ver1(__strrchr_ppc, __GI_strrchr, __strrchr_ppc);
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strrchr.c b/sysdeps/powerpc/powerpc64/multiarch/strrchr.c
index 046162f..11d3f62 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strrchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strrchr.c
@@ -17,7 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 /* Define multiple versions only for definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c
index d543772..b35af3e 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c
@@ -22,7 +22,7 @@
 #define weak_alias(name, aliasname) \
   extern __typeof (__strspn_ppc) aliasname \
     __attribute__ ((weak, alias ("__strspn_ppc")));
-#if !defined(NOT_IN_libc) && defined(SHARED)
+#if IS_IN (libc) && defined(SHARED)
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(name) \
   __hidden_ver1(__strspn_ppc, __GI_strspn, __strspn_ppc);
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strspn.c b/sysdeps/powerpc/powerpc64/multiarch/strspn.c
index bf8c877..dd9ec18 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strspn.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strspn.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <string.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcschr.c b/sysdeps/powerpc/powerpc64/multiarch/wcschr.c
index 216d2bc..6b8cd9c 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/wcschr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/wcschr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcscpy.c b/sysdeps/powerpc/powerpc64/multiarch/wcscpy.c
index 5c0a6d3..aadf490 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/wcscpy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/wcscpy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcsrchr.c b/sysdeps/powerpc/powerpc64/multiarch/wcsrchr.c
index 3d0ab42..91ba389 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/wcsrchr.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/wcsrchr.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 # include <shlib-compat.h>
 # include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wordcopy.c b/sysdeps/powerpc/powerpc64/multiarch/wordcopy.c
index 889be25..54ca039 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/wordcopy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/wordcopy.c
@@ -16,7 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <stddef.h>
 # include <memcopy.h>
 # include <shlib-compat.h>
diff --git a/sysdeps/powerpc/powerpc64/setjmp.S b/sysdeps/powerpc/powerpc64/setjmp.S
index c15908c..a8de3bb 100644
--- a/sysdeps/powerpc/powerpc64/setjmp.S
+++ b/sysdeps/powerpc/powerpc64/setjmp.S
@@ -20,7 +20,7 @@
 #include <rtld-global-offsets.h>
 #include <shlib-compat.h>
 
-#if defined NOT_IN_libc
+#if !IS_IN (libc)
 /* Build a non-versioned object for rtld-*.  */
 # define setjmp_symbol setjmp
 # define _setjmp_symbol _setjmp
@@ -28,7 +28,7 @@
 # define __sigjmp_save_symbol __sigjmp_save
 # include "setjmp-common.S"
 
-#else /* !NOT_IN_libc */
+#else /* IS_IN (libc) */
 /* Build a versioned object for libc.  */
 versioned_symbol (libc, __vmxsetjmp, setjmp, GLIBC_2_3_4)
 versioned_symbol (libc, __vmx_setjmp, _setjmp, GLIBC_2_3_4)
@@ -58,4 +58,4 @@ compat_symbol (libc, __novmx__sigsetjmp,__sigsetjmp, GLIBC_2_3)
 #  include "setjmp-common.S"
 strong_alias (__novmxsetjmp, __novmx__setjmp)
 # endif
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
diff --git a/sysdeps/s390/s390-32/multiarch/ifunc-resolve.c b/sysdeps/s390/s390-32/multiarch/ifunc-resolve.c
index 2ccfc9c..a46c9a1 100644
--- a/sysdeps/s390/s390-32/multiarch/ifunc-resolve.c
+++ b/sysdeps/s390/s390-32/multiarch/ifunc-resolve.c
@@ -23,7 +23,7 @@
 #define STFLE_BITS_Z10  34 /* General instructions extension */
 #define STFLE_BITS_Z196 45 /* Distinct operands, pop ... */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #define IFUNC_RESOLVE(FUNC)						\
   asm (".globl " #FUNC "\n\t"						\
diff --git a/sysdeps/s390/s390-32/multiarch/memcmp.S b/sysdeps/s390/s390-32/multiarch/memcmp.S
index f298baa..32f08ef 100644
--- a/sysdeps/s390/s390-32/multiarch/memcmp.S
+++ b/sysdeps/s390/s390-32/multiarch/memcmp.S
@@ -27,7 +27,7 @@
 
        .text
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 ENTRY(memcmp_z196)
 	.machine "z196"
@@ -96,7 +96,7 @@ END(memcmp_z10)
 
 #include "../memcmp.S"
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 .globl   memcmp
 .set     memcmp,memcmp_g5
 .weak    bcmp
diff --git a/sysdeps/s390/s390-32/multiarch/memcpy.S b/sysdeps/s390/s390-32/multiarch/memcpy.S
index 78ed737..bc65bd8 100644
--- a/sysdeps/s390/s390-32/multiarch/memcpy.S
+++ b/sysdeps/s390/s390-32/multiarch/memcpy.S
@@ -27,7 +27,7 @@
 
        .text
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 
 ENTRY(memcpy_z196)
 	.machine "z196"
@@ -92,7 +92,7 @@ END(memcpy_z10)
 
 #include "../memcpy.S"
 
-#if !defined SHARED || defined NOT_IN_libc
+#if !defined SHARED || !IS_IN (libc)
 .globl   memcpy
 .set     memcpy,memcpy_g5
 #endif
diff --git a/sysdeps/s390/s390-32/multiarch/memset.S b/sysdeps/s390/s390-32/multiarch/memset.S
index 99d7df0..971c593 100644
--- a/sysdeps/s390/s390-32/multiarch/memset.S
+++ b/sysdeps/s390/s390-32/multiarch/memset.S
@@ -27,7 +27,7 @@
 
        .text
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 ENTRY(memset_z196)
 	.machine "z196"
@@ -107,7 +107,7 @@ END(memset_mvcle)
 
 #include "../memset.S"
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 .globl   memset
 .set     memset,memset_g5
 #endif
diff --git a/sysdeps/s390/s390-64/multiarch/ifunc-resolve.c b/sysdeps/s390/s390-64/multiarch/ifunc-resolve.c
index f8c69ff..f8b9040 100644
--- a/sysdeps/s390/s390-64/multiarch/ifunc-resolve.c
+++ b/sysdeps/s390/s390-64/multiarch/ifunc-resolve.c
@@ -23,7 +23,7 @@
 #define STFLE_BITS_Z10  34 /* General instructions extension */
 #define STFLE_BITS_Z196 45 /* Distinct operands, pop ... */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 #define IFUNC_RESOLVE(FUNC)						\
   asm (".globl " #FUNC "\n\t"						\
diff --git a/sysdeps/s390/s390-64/multiarch/memcmp.S b/sysdeps/s390/s390-64/multiarch/memcmp.S
index c31d7c4..8e4eca2 100644
--- a/sysdeps/s390/s390-64/multiarch/memcmp.S
+++ b/sysdeps/s390/s390-64/multiarch/memcmp.S
@@ -27,7 +27,7 @@
 
        .text
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 ENTRY(memcmp_z196)
 	.machine "z196"
@@ -93,7 +93,7 @@ END(memcmp_z10)
 
 #include "../memcmp.S"
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 .globl   memcmp
 .set     memcmp,memcmp_z900
 .weak    bcmp
diff --git a/sysdeps/s390/s390-64/multiarch/memcpy.S b/sysdeps/s390/s390-64/multiarch/memcpy.S
index 6590f43..2536ef4 100644
--- a/sysdeps/s390/s390-64/multiarch/memcpy.S
+++ b/sysdeps/s390/s390-64/multiarch/memcpy.S
@@ -27,7 +27,7 @@
 
        .text
 
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 
 ENTRY(memcpy_z196)
         .machine "z196"
@@ -88,7 +88,7 @@ END(memcpy_z10)
 
 #include "../memcpy.S"
 
-#if !defined SHARED || defined NOT_IN_libc
+#if !defined SHARED || !IS_IN (libc)
 .globl   memcpy
 .set     memcpy,memcpy_z900
 #endif
diff --git a/sysdeps/s390/s390-64/multiarch/memset.S b/sysdeps/s390/s390-64/multiarch/memset.S
index 3b96269..4d52051 100644
--- a/sysdeps/s390/s390-64/multiarch/memset.S
+++ b/sysdeps/s390/s390-64/multiarch/memset.S
@@ -27,7 +27,7 @@
 
        .text
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 ENTRY(memset_z196)
 	.machine "z196"
@@ -103,7 +103,7 @@ END(memset_mvcle)
 
 #include "../memset.S"
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 .globl   memset
 .set     memset,memset_z900
 #endif
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara1.S b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara1.S
index 4b7b22d..a1c5588 100644
--- a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara1.S
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara1.S
@@ -35,7 +35,7 @@
 #define XCC xcc
 #endif
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2,#scratch
 	.register	%g3,#scratch
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S
index a1a9642..a77618b 100644
--- a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S
@@ -137,7 +137,7 @@
 	LOAD(ldd, base + 0x28, %x5); \
 	LOAD(ldd, base + 0x30, %x6);
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2,#scratch
 	.register	%g3,#scratch
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara4.S b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara4.S
index 63e0d83..24c6c6d 100644
--- a/sysdeps/sparc/sparc64/multiarch/memcpy-niagara4.S
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy-niagara4.S
@@ -46,7 +46,7 @@
 #define STORE(type,src,addr)	type src, [addr]
 #define STORE_INIT(src,addr)	stxa src, [addr] STORE_ASI
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2,#scratch
 	.register	%g3,#scratch
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S b/sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
index ffb3646..88a58d6 100644
--- a/sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
@@ -30,7 +30,7 @@
 #define XCC xcc
 #endif
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2,#scratch
 	.register	%g3,#scratch
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy.S b/sysdeps/sparc/sparc64/multiarch/memcpy.S
index 62977a4..dad39ec 100644
--- a/sysdeps/sparc/sparc64/multiarch/memcpy.S
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy.S
@@ -20,7 +20,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(memcpy)
 	.type	memcpy, @gnu_indirect_function
diff --git a/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S b/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S
index ed53522..ae45f5d 100644
--- a/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S
+++ b/sysdeps/sparc/sparc64/multiarch/memset-niagara1.S
@@ -28,7 +28,7 @@
 #define XCC xcc
 #endif
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2,#scratch
 
diff --git a/sysdeps/sparc/sparc64/multiarch/memset-niagara4.S b/sysdeps/sparc/sparc64/multiarch/memset-niagara4.S
index c090c50..dc17e89 100644
--- a/sysdeps/sparc/sparc64/multiarch/memset-niagara4.S
+++ b/sysdeps/sparc/sparc64/multiarch/memset-niagara4.S
@@ -21,7 +21,7 @@
 
 #define ASI_BLK_INIT_QUAD_LDD_P	0xe2
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 	.register	%g2, #scratch
 	.register	%g3, #scratch
diff --git a/sysdeps/sparc/sparc64/multiarch/memset.S b/sysdeps/sparc/sparc64/multiarch/memset.S
index 96c75e0..2f63fe9 100644
--- a/sysdeps/sparc/sparc64/multiarch/memset.S
+++ b/sysdeps/sparc/sparc64/multiarch/memset.S
@@ -20,7 +20,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(memset)
 	.type	memset, @gnu_indirect_function
diff --git a/sysdeps/unix/alpha/sysdep.S b/sysdeps/unix/alpha/sysdep.S
index a39ee61..22b8b6c 100644
--- a/sysdeps/unix/alpha/sysdep.S
+++ b/sysdeps/unix/alpha/sysdep.S
@@ -28,7 +28,7 @@
 	.text
 #endif
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define SYSCALL_ERROR_ERRNO __libc_errno
 #else
 # define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/alpha/sysdep.h b/sysdeps/unix/alpha/sysdep.h
index 0b5ff20..4a280cd 100644
--- a/sysdeps/unix/alpha/sysdep.h
+++ b/sysdeps/unix/alpha/sysdep.h
@@ -372,7 +372,7 @@ __LABEL(name)						\
 #else
 # include <stdint.h>
 # if (IS_IN (rtld) \
-      || (!defined SHARED && (!defined NOT_IN_libc \
+      || (!defined SHARED && (IS_IN (libc) \
 			      || IS_IN (libpthread))))
 extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
 #  define PTR_MANGLE(var) \
diff --git a/sysdeps/unix/make-syscalls.sh b/sysdeps/unix/make-syscalls.sh
index 6eba62c..78ddef6 100644
--- a/sysdeps/unix/make-syscalls.sh
+++ b/sysdeps/unix/make-syscalls.sh
@@ -96,7 +96,7 @@ emit_weak_aliases()
       *@@*)
 	base=`echo $name | sed 's/@@.*//'`
 	ver=`echo $name | sed 's/.*@@//;s/\./_/g'`
-	echo "	 echo '#ifndef NOT_IN_libc'; \\"
+	echo "	 echo '#if IS_IN (libc)'; \\"
 	if test -z "$vcount" ; then
 	  source=$strong
 	  vcount=1
@@ -113,7 +113,7 @@ emit_weak_aliases()
       *@*)
 	base=`echo $name | sed 's/@.*//'`
 	ver=`echo $name | sed 's/.*@//;s/\./_/g'`
-	echo "	 echo '#ifndef NOT_IN_libc'; \\"
+	echo "	 echo '#if IS_IN (libc)'; \\"
 	if test -z "$vcount" ; then
 	  source=$strong
 	  vcount=1
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 2d6d8bb..72754b7 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -179,7 +179,6 @@ sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64 dl-opendir \
 			dl-fxstatat64
 
 libof-lddlibc4 = lddlibc4
-CPPFLAGS-lddlibc4 += -DNOT_IN_libc
 
 others += pldd
 install-bin += pldd
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h
index f2f8009..de88ad2 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				\
@@ -85,7 +85,7 @@ ENTRY (name);								\
 #  define CENABLE	bl __pthread_enable_asynccancel
 #  define CDISABLE	bl __pthread_disable_asynccancel
 #  define __local_multiple_threads __pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	bl __libc_enable_asynccancel
 #  define CDISABLE	bl __libc_disable_asynccancel
 #  define __local_multiple_threads __libc_multiple_threads
@@ -96,7 +96,7 @@ ENTRY (name);								\
 #  error Unsupported library
 # endif
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
index 3fb67427..45a8636 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -92,7 +92,7 @@
 
 # define ret_ERRVAL ret
 
-# if NOT_IN_libc
+# if !IS_IN (libc)
 #  define SYSCALL_ERROR  .Lsyscall_error
 #  if RTLD_PRIVATE_ERRNO
 #   define SYSCALL_ERROR_HANDLER				\
@@ -310,7 +310,7 @@
 
 /* Pointer mangling is supported for AArch64.  */
 #if (IS_IN (rtld) || \
-     (!defined SHARED && (!defined NOT_IN_libc \
+     (!defined SHARED && (IS_IN (libc) \
 			  || IS_IN (libpthread))))
 # ifdef __ASSEMBLER__
 #  define PTR_MANGLE(dst, src, guard, tmp)                                \
diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h b/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
index 5479556..d8439bf 100644
--- a/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
@@ -21,7 +21,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 /* ??? Assumes that nothing comes between PSEUDO and PSEUDO_END
    besides "ret".  */
@@ -117,7 +117,7 @@ __LABEL($multi_error)						\
 #  define __local_enable_asynccancel	__pthread_enable_asynccancel
 #  define __local_disable_asynccancel	__pthread_disable_asynccancel
 #  define __local_multiple_threads	__pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define __local_enable_asynccancel	__libc_enable_asynccancel
 #  define __local_disable_asynccancel	__libc_disable_asynccancel
 #  define __local_multiple_threads	__libc_multiple_threads
@@ -136,7 +136,7 @@ __LABEL($multi_error)						\
 #  define CDISABLE	jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp)
 # endif
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P \
diff --git a/sysdeps/unix/sysv/linux/alpha/vfork.S b/sysdeps/unix/sysv/linux/alpha/vfork.S
index befcd78..d18ae27 100644
--- a/sysdeps/unix/sysv/linux/alpha/vfork.S
+++ b/sysdeps/unix/sysv/linux/alpha/vfork.S
@@ -49,7 +49,7 @@ ENTRY(__libc_vfork)
 
 PSEUDO_END (__libc_vfork)
 
-#if !NOT_IN_libc
+#if IS_IN (libc)
 weak_alias (__libc_vfork, vfork)
 strong_alias (__libc_vfork, __vfork)
 libc_hidden_def (__vfork)
diff --git a/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h b/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
index 9211d04..f966e95 100644
--- a/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
@@ -21,7 +21,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 /* NOTE: We do mark syscalls with unwind annotations, for the benefit of
    cancellation; but they're really only accurate at the point of the
@@ -185,7 +185,7 @@
 #  define CENABLE	bl PLTJMP(__pthread_enable_asynccancel)
 #  define CDISABLE	bl PLTJMP(__pthread_disable_asynccancel)
 #  define __local_multiple_threads __pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	bl PLTJMP(__libc_enable_asynccancel)
 #  define CDISABLE	bl PLTJMP(__libc_disable_asynccancel)
 #  define __local_multiple_threads __libc_multiple_threads
@@ -196,7 +196,7 @@
 #  error Unsupported library
 # endif
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
diff --git a/sysdeps/unix/sysv/linux/arm/sysdep.h b/sysdeps/unix/sysv/linux/arm/sysdep.h
index 52e27d0..4863f0e 100644
--- a/sysdeps/unix/sysv/linux/arm/sysdep.h
+++ b/sysdeps/unix/sysv/linux/arm/sysdep.h
@@ -137,7 +137,7 @@
 
 #define ret_ERRVAL PSEUDO_RET_NOERRNO
 
-#if NOT_IN_libc
+#if !IS_IN (libc)
 # define SYSCALL_ERROR __local_syscall_error
 # if RTLD_PRIVATE_ERRNO
 #  define SYSCALL_ERROR_HANDLER					\
diff --git a/sysdeps/unix/sysv/linux/getpid.c b/sysdeps/unix/sysv/linux/getpid.c
index 937b1d4..af5db44 100644
--- a/sysdeps/unix/sysv/linux/getpid.c
+++ b/sysdeps/unix/sysv/linux/getpid.c
@@ -21,7 +21,7 @@
 #include <sysdep.h>
 
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 static inline __attribute__((always_inline)) pid_t really_getpid (pid_t oldval);
 
 static inline __attribute__((always_inline)) pid_t
@@ -48,7 +48,7 @@ really_getpid (pid_t oldval)
 pid_t
 __getpid (void)
 {
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
   INTERNAL_SYSCALL_DECL (err);
   pid_t result = INTERNAL_SYSCALL (getpid, err, 0);
 #else
diff --git a/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h b/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h
index 9a60492..2a4d273 100644
--- a/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h
@@ -58,7 +58,7 @@
 /* Initialize locks to zero.  */
 #define LLL_MUTEX_LOCK_INITIALIZER (0)
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h b/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
index 5d4ff34..aec3f37 100644
--- a/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # ifndef NO_ERROR
 #  define NO_ERROR -0x1000
@@ -216,7 +216,7 @@ L(pre_end):						ASM_LINE_SEP	\
 #   define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \
 			bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP
 #  endif
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  ifdef PIC
 #   define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \
 			bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP
@@ -246,7 +246,7 @@ L(pre_end):						ASM_LINE_SEP	\
 
 # if IS_IN (libpthread)
 #  define __local_multiple_threads __pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define __local_multiple_threads __libc_multiple_threads
 # elif IS_IN (librt)
 #  define __local_multiple_threads __librt_multiple_threads
@@ -271,7 +271,7 @@ L(pre_end):						ASM_LINE_SEP	\
 # define NO_CANCELLATION 1
 
 #endif
-/* !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt) */
+/* IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt) */
 
 #ifndef __ASSEMBLER__
 # define RTLD_SINGLE_THREAD_P \
diff --git a/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S b/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
index 4ed46fc..13596f1 100644
--- a/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
+++ b/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
@@ -115,7 +115,7 @@ __lll_lock_wait_private:
 	cfi_endproc
 	.size	__lll_lock_wait_private,.-__lll_lock_wait_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_lock_wait
 	.type	__lll_lock_wait,@function
 	.hidden	__lll_lock_wait
@@ -361,7 +361,7 @@ __lll_unlock_wake_private:
 	cfi_endproc
 	.size	__lll_unlock_wake_private,.-__lll_unlock_wake_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_unlock_wake
 	.type	__lll_unlock_wake,@function
 	.hidden	__lll_unlock_wake
diff --git a/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/sysdeps/unix/sysv/linux/i386/lowlevellock.h
index ffae477..1032f4b 100644
--- a/sysdeps/unix/sysv/linux/i386/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/i386/lowlevellock.h
@@ -71,7 +71,7 @@
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
@@ -169,7 +169,7 @@
    value is zero.  In case the operation failed, the cmpxchg instruction
    has loaded the current value of the memory work which is guaranteed
    to be nonzero.  */
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_trylock_asm LOCK_INSTR "cmpxchgl %2, %1"
 #else
 # define __lll_trylock_asm "cmpl $0, %%gs:%P5\n\t" \
@@ -198,7 +198,7 @@
 		       : "memory");					      \
      ret; })
 
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_lock_asm_start LOCK_INSTR "cmpxchgl %1, %2\n\t"
 #else
 # define __lll_lock_asm_start "cmpl $0, %%gs:%P6\n\t"			      \
@@ -324,7 +324,7 @@ extern int __lll_timedlock_elision (int *futex, short *adapt_count,
 		       : "memory");					      \
      result; })
 
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_unlock_asm LOCK_INSTR "subl $1, %0\n\t"
 #else
 # define __lll_unlock_asm "cmpl $0, %%gs:%P3\n\t"			      \
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h b/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
index c17ff6c..ab15b9d 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -111,7 +111,7 @@
 # if IS_IN (libpthread)
 #  define CENABLE	call __pthread_enable_asynccancel;
 #  define CDISABLE	call __pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	call __libc_enable_asynccancel;
 #  define CDISABLE	call __libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index b538004..d751c58 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -34,7 +34,7 @@
 #define SYS_ify(syscall_name)	__NR_##syscall_name
 
 #if defined USE_DL_SYSINFO \
-    && (!defined NOT_IN_libc || IS_IN (libpthread))
+    && (IS_IN (libc) || IS_IN (libpthread))
 # define I386_USE_SYSENTER	1
 #else
 # undef I386_USE_SYSENTER
@@ -115,7 +115,7 @@
 
 # elif defined _LIBC_REENTRANT
 
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/ia64/lowlevellock.h b/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
index fe4a90e..b586731 100644
--- a/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
@@ -52,7 +52,7 @@
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
index 0458fce..c402dca 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
@@ -22,11 +22,11 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define SYSDEP_CANCEL_ERRNO __libc_errno
 # else
 #  define SYSDEP_CANCEL_ERRNO errno
@@ -182,7 +182,7 @@ __GC_##name:								      \
 # if IS_IN (libpthread)
 #  define CENABLE	br.call.sptk.many b0 = __pthread_enable_asynccancel
 #  define CDISABLE	br.call.sptk.many b0 = __pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	br.call.sptk.many b0 = __libc_enable_asynccancel
 #  define CDISABLE	br.call.sptk.many b0 = __libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.S b/sysdeps/unix/sysv/linux/ia64/sysdep.S
index 004ade1..9ec8951 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep.S
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep.S
@@ -34,7 +34,7 @@ ENTRY(__syscall_error)
 	st4	[r2]=r8
 	mov	r8=-1
 #else
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define SYSCALL_ERROR_ERRNO __libc_errno
 # else
 #  define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h
index 0943852..49684f8 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h
@@ -61,7 +61,7 @@
 #endif
 
 #if defined USE_DL_SYSINFO \
-	&& (!defined NOT_IN_libc \
+	&& (IS_IN (libc) \
 	    || IS_IN (libpthread) || IS_IN (librt))
 # define IA64_USE_NEW_STUB
 #else
diff --git a/sysdeps/unix/sysv/linux/lowlevellock-futex.h b/sysdeps/unix/sysv/linux/lowlevellock-futex.h
index 11150b3..8927661 100644
--- a/sysdeps/unix/sysv/linux/lowlevellock-futex.h
+++ b/sysdeps/unix/sysv/linux/lowlevellock-futex.h
@@ -49,7 +49,7 @@
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h b/sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h
index b75bf17..aa116c4 100644
--- a/sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h
+++ b/sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h
@@ -35,7 +35,7 @@
 
 /* We define __rtld_* copies for rtld.
    We need them visible in libc to initialize.  */
-#  if IS_IN (rtld) || !defined NOT_IN_libc
+#  if IS_IN (rtld) || IS_IN (libc)
 extern void *__rtld___vdso_read_tp;
 extern void *__rtld___vdso_atomic_cmpxchg_32;
 extern void *__rtld___vdso_atomic_barrier;
@@ -44,7 +44,7 @@ extern void *__rtld___vdso_atomic_barrier;
 extern void __vdso_read_tp_stub (void);
 extern void __vdso_atomic_cmpxchg_32_stub (void);
 extern void __vdso_atomic_barrier_stub (void);
-#  endif /* IS_IN (rtld) || !NOT_IN_libc */
+#  endif /* IS_IN (rtld) || IS_IN (libc) */
 
 /* RTLD should only use its own copies.  */
 #  if !IS_IN (rtld)
diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h b/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h
index 33ce922..d5b8445 100644
--- a/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -103,7 +103,7 @@
 # if IS_IN (libpthread)
 #  define CENABLE	PSEUDO_JMP (__pthread_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__pthread_disable_asynccancel)
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	PSEUDO_JMP (__libc_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__libc_disable_asynccancel)
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h
index 3a91e86..9709088 100644
--- a/sysdeps/unix/sysv/linux/m68k/sysdep.h
+++ b/sysdeps/unix/sysv/linux/m68k/sysdep.h
@@ -101,7 +101,7 @@ SYSCALL_ERROR_LABEL:							      \
     move.l %d0, %a0;							      \
     rts;
 # elif defined _LIBC_REENTRANT
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h b/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h
index 9c21eeb..6592484 100644
--- a/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h
@@ -52,7 +52,7 @@
 #define LLL_SHARED  FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private)                                      \
diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h b/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
index 0fe5b12..5e185a3 100644
--- a/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
@@ -21,7 +21,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # if !IS_IN (librt) || !defined(PIC)
 #  define AC_STACK_SIZE  16  /* space for r15, async_cancel arg and 2 temp words */
@@ -106,7 +106,7 @@ L(pseudo_cancel):                                                    \
 #  define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
 #  define CDISABLE  PSEUDO_JMP (__pthread_disable_asynccancel)
 #  define __local_multiple_threads __pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
 #  define CDISABLE  PSEUDO_JMP (__libc_disable_asynccancel)
 #  define __local_multiple_threads __libc_multiple_threads
@@ -118,7 +118,7 @@ L(pseudo_cancel):                                                    \
 # endif
 
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
index 6f79b14..40e4225 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
@@ -27,7 +27,7 @@
    happen before any instructions.  So we use cfi_same_value instead of
    cfi_restore.  */
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 #ifdef __PIC__
 # undef PSEUDO
diff --git a/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h b/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h
index 1d711f7..e12eea7 100644
--- a/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # ifdef __PIC__
 #  define PSEUDO_CPLOAD .cpload t9;
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index 1d65f20..0858ce8 100644
--- a/sysdeps/unix/sysv/linux/not-cancel.h
+++ b/sysdeps/unix/sysv/linux/not-cancel.h
@@ -19,7 +19,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 extern int __open_nocancel (const char *, int, ...) attribute_hidden;
 extern int __close_nocancel (int) attribute_hidden;
 extern int __read_nocancel (int, void *, size_t) attribute_hidden;
diff --git a/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h b/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
index 54ccc41..49cbca7 100644
--- a/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
@@ -52,7 +52,7 @@
 #define LLL_PRIVATE	0
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
index 25bf797..db1dfb8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
@@ -23,7 +23,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				\
@@ -84,7 +84,7 @@
 # if IS_IN (libpthread)
 #  define CENABLE	bl __pthread_enable_asynccancel@local
 #  define CDISABLE	bl __pthread_disable_asynccancel@local
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	bl __libc_enable_asynccancel@local
 #  define CDISABLE	bl __libc_disable_asynccancel@local
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h
index 8683b6b..9fff750 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h
@@ -23,7 +23,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # ifdef HAVE_ASM_GLOBAL_DOT_NAME
 #  define DASHDASHPFX(str) .__##str
@@ -107,7 +107,7 @@
 #   define CENABLE	bl JUMPTARGET(__pthread_enable_asynccancel); nop
 #   define CDISABLE	bl JUMPTARGET(__pthread_disable_asynccancel); nop
 #  endif
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  ifdef SHARED
 #   define CENABLE	bl JUMPTARGET(__libc_enable_asynccancel)
 #   define CDISABLE	bl JUMPTARGET(__libc_disable_asynccancel)
diff --git a/sysdeps/unix/sysv/linux/s390/longjmp_chk.c b/sysdeps/unix/sysv/linux/s390/longjmp_chk.c
index 02c96c2..d18fbdf 100644
--- a/sysdeps/unix/sysv/linux/s390/longjmp_chk.c
+++ b/sysdeps/unix/sysv/linux/s390/longjmp_chk.c
@@ -20,7 +20,7 @@
 
 #include <shlib-compat.h>
 
-#if !defined NOT_IN_libc && defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)
+#if IS_IN (libc) && defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)
 /* this is a copy from debug/longjmp_chk.c because we need an unique name
    for __longjmp_chk, but it is already named via a define
    for __libc_siglongjmp in debug/longjmp_chk.c.  */
diff --git a/sysdeps/unix/sysv/linux/s390/lowlevellock.h b/sysdeps/unix/sysv/linux/s390/lowlevellock.h
index 2c17b2c..14fb4a8 100644
--- a/sysdeps/unix/sysv/linux/s390/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/s390/lowlevellock.h
@@ -51,7 +51,7 @@
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h
index d19500d..3b027e0 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -78,7 +78,7 @@ L(pseudo_end):
 # if IS_IN (libpthread)
 #  define CENABLE	__pthread_enable_asynccancel
 #  define CDISABLE	__pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	__libc_enable_asynccancel
 #  define CDISABLE	__libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S
index de3f8a4..aca7e22 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S
@@ -31,7 +31,7 @@
 	.text
 ENTRY(__syscall_error)
 #ifndef PIC
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define SYSCALL_ERROR_ERRNO __libc_errno
 # else
 #  define SYSCALL_ERROR_ERRNO errno
@@ -54,7 +54,7 @@ ENTRY(__syscall_error)
 	br	%r14
 1:	.long	rtld_errno - 0b
 # else
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
index e6fd96a..f0ef41c 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
@@ -105,7 +105,7 @@
     br    %r14;								      \
 2:  .long rtld_errno-1b
 # elif defined _LIBC_REENTRANT
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S b/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S
index 290e464..3a368c8 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S
@@ -52,7 +52,7 @@ ENTRY (__libc_vfork)
 	br	%r14
 PSEUDO_END (__libc_vfork)
 
-#if !NOT_IN_libc
+#if IS_IN (libc)
 weak_alias (__libc_vfork, vfork)
 strong_alias (__libc_vfork, __vfork)
 libc_hidden_def (__vfork)
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h
index 9622d5a..4955ec1 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -73,7 +73,7 @@ L(pseudo_end):
 #  define CENABLE	__pthread_enable_asynccancel
 #  define CDISABLE	__pthread_disable_asynccancel
 #  define __local_multiple_threads	__pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	__libc_enable_asynccancel
 #  define CDISABLE	__libc_disable_asynccancel
 #  define __local_multiple_threads	__libc_multiple_threads
@@ -111,7 +111,7 @@ L(pseudo_end):
 #define LR7_6		lg %r7,56+160(%r15); \
 			cfi_restore (%r7);
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P \
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S
index 0fbfe9c..6b4a613 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S
@@ -32,7 +32,7 @@
 .text
 ENTRY(__syscall_error)
 #ifndef PIC
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define SYSCALL_ERROR_ERRNO __libc_errno
 # else
 #  define SYSCALL_ERROR_ERRNO errno
@@ -55,7 +55,7 @@ ENTRY(__syscall_error)
 	lghi	%r2,-1
 	br	%r14
 # else
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
index 917a636..696e4b3 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
@@ -113,7 +113,7 @@
     lghi  %r2,-1;							      \
     br    %r14
 # elif defined _LIBC_REENTRANT
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S
index 7de1bb0..54bb272 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S
@@ -53,7 +53,7 @@ ENTRY (__libc_vfork)
 	br	%r14
 PSEUDO_END (__libc_vfork)
 
-#if !NOT_IN_libc
+#if IS_IN (libc)
 weak_alias (__libc_vfork, vfork)
 strong_alias (__libc_vfork, __vfork)
 libc_hidden_def (__vfork)
diff --git a/sysdeps/unix/sysv/linux/sh/lowlevellock.S b/sysdeps/unix/sysv/linux/sh/lowlevellock.S
index 84b8edb..3fab373 100644
--- a/sysdeps/unix/sysv/linux/sh/lowlevellock.S
+++ b/sysdeps/unix/sysv/linux/sh/lowlevellock.S
@@ -172,7 +172,7 @@ __lll_lock_wait_private:
 	cfi_endproc
 	.size	__lll_lock_wait_private,.-__lll_lock_wait_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_lock_wait
 	.type	__lll_lock_wait,@function
 	.hidden	__lll_lock_wait
@@ -454,7 +454,7 @@ __lll_unlock_wake_private:
 	cfi_endproc
 	.size	__lll_unlock_wake_private,.-__lll_unlock_wake_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_unlock_wake
 	.type	__lll_unlock_wake,@function
 	.hidden	__lll_unlock_wake
diff --git a/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/sysdeps/unix/sysv/linux/sh/lowlevellock.h
index 328446c..e6dbab2 100644
--- a/sysdeps/unix/sysv/linux/sh/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/sh/lowlevellock.h
@@ -49,7 +49,7 @@
 #define LLL_SHARED     FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
index 131f42b..9b5911c 100644
--- a/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
@@ -21,7 +21,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # define _IMM12 #-12
 # define _IMM16 #-16
@@ -108,7 +108,7 @@
 # if IS_IN (libpthread)
 #  define __local_enable_asynccancel	__pthread_enable_asynccancel
 #  define __local_disable_asynccancel	__pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define __local_enable_asynccancel	__libc_enable_asynccancel
 #  define __local_disable_asynccancel	__libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/sh/sysdep.h b/sysdeps/unix/sysv/linux/sh/sysdep.h
index 4fc5dd7..6f57854 100644
--- a/sysdeps/unix/sysv/linux/sh/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sh/sysdep.h
@@ -116,7 +116,7 @@
 
 # elif defined _LIBC_REENTRANT
 
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/sh/vfork.S b/sysdeps/unix/sysv/linux/sh/vfork.S
index 76326f5..63ca023 100644
--- a/sysdeps/unix/sysv/linux/sh/vfork.S
+++ b/sysdeps/unix/sysv/linux/sh/vfork.S
@@ -66,7 +66,7 @@ ENTRY (__libc_vfork)
 	.align	2
 PSEUDO_END (__libc_vfork)
 
-#if !NOT_IN_libc
+#if IS_IN (libc)
 weak_alias (__libc_vfork, vfork)
 strong_alias (__libc_vfork, __vfork)
 libc_hidden_def (__vfork)
diff --git a/sysdeps/unix/sysv/linux/sparc/lowlevellock.h b/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
index eebf406..5c8c3f4 100644
--- a/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
@@ -57,7 +57,7 @@ extern void __cpu_relax (void);
 #define BUSY_WAIT_NOP	__cpu_relax ()
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h
index cc7adfc..526e875 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)	\
@@ -71,7 +71,7 @@ __##syscall_name##_nocancel:			\
 # if IS_IN (libpthread)
 #  define CENABLE	call __pthread_enable_asynccancel
 #  define CDISABLE	call __pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	call __libc_enable_asynccancel
 #  define CDISABLE	call __libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
index e5bb3b5..c9f38f4 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
@@ -79,7 +79,7 @@ ENTRY(name);					\
 	 mov	-1, %o0;
 # elif defined _LIBC_REENTRANT
 
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S b/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S
index 567163f..875ee3d 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S
@@ -89,7 +89,7 @@ ENTRY (__brk)
 #endif
 	st	%o0, [%g1]
 #else
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	call	HIDDEN_JUMPTARGET(__errno_location)
 #else
 	call	__errno_location
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h
index aee3dee..e11f7c1 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)	\
@@ -69,7 +69,7 @@ __##syscall_name##_nocancel:			\
 # if IS_IN (libpthread)
 #  define CENABLE	call __pthread_enable_asynccancel
 #  define CDISABLE	call __pthread_disable_asynccancel
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	call __libc_enable_asynccancel
 #  define CDISABLE	call __libc_disable_asynccancel
 # elif IS_IN (librt)
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
index e9aedce..52b07c2 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
@@ -89,7 +89,7 @@ ENTRY(name);					\
 	 mov	-1, %o0;
 # elif defined _LIBC_REENTRANT
 
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/unix/sysv/linux/tile/lowlevellock.h b/sysdeps/unix/sysv/linux/tile/lowlevellock.h
index c9d2e54..7f49e27 100644
--- a/sysdeps/unix/sysv/linux/tile/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/tile/lowlevellock.h
@@ -52,7 +52,7 @@
 #define LLL_SHARED	FUTEX_PRIVATE_FLAG
 
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
diff --git a/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h b/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h
index 028c393..6c10552 100644
--- a/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 /* Allow hacking in some extra code if desired. */
 #ifndef PSEUDO_EXTRA
diff --git a/sysdeps/unix/sysv/linux/tile/sysdep.h b/sysdeps/unix/sysv/linux/tile/sysdep.h
index a79a936..5847dda 100644
--- a/sysdeps/unix/sysv/linux/tile/sysdep.h
+++ b/sysdeps/unix/sysv/linux/tile/sysdep.h
@@ -45,7 +45,7 @@
 #ifndef PIC
 /* For static code, on error jump to __syscall_error directly. */
 # define SYSCALL_ERROR_NAME __syscall_error
-#elif !defined NOT_IN_libc || IS_IN (libpthread)
+#elif IS_IN (libc) || IS_IN (libpthread)
 /* Use the internal name for libc/libpthread shared objects. */
 # define SYSCALL_ERROR_NAME __GI___syscall_error
 #else
diff --git a/sysdeps/unix/sysv/linux/tile/waitpid.S b/sysdeps/unix/sysv/linux/tile/waitpid.S
index e613b1c..58d7205 100644
--- a/sysdeps/unix/sysv/linux/tile/waitpid.S
+++ b/sysdeps/unix/sysv/linux/tile/waitpid.S
@@ -1,7 +1,7 @@
 /*
 extern pid_t __waitpid_nocancel (pid_t, int *, int) attribute_hidden;
 */
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 /* Call __NR_wait4, providing fourth argument (struct rusage *) as NULL. */
 #define PSEUDO_EXTRA move r3, zero;
diff --git a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
index f2dca07..5d8e77c 100644
--- a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
+++ b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
@@ -108,7 +108,7 @@ __lll_lock_wait_private:
 	cfi_endproc
 	.size	__lll_lock_wait_private,.-__lll_lock_wait_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_lock_wait
 	.type	__lll_lock_wait,@function
 	.hidden	__lll_lock_wait
@@ -348,7 +348,7 @@ __lll_unlock_wake_private:
 	cfi_endproc
 	.size	__lll_unlock_wake_private,.-__lll_unlock_wake_private
 
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 	.globl	__lll_unlock_wake
 	.type	__lll_unlock_wake,@function
 	.hidden	__lll_unlock_wake
diff --git a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
index 37c0faf..2f0cf5c 100644
--- a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
@@ -72,7 +72,7 @@
 
 #ifndef __ASSEMBLER__
 
-#if !defined NOT_IN_libc || IS_IN (rtld)
+#if IS_IN (libc) || IS_IN (rtld)
 /* In libc.so or ld.so all futexes are private.  */
 # ifdef __ASSUME_PRIVATE_FUTEX
 #  define __lll_private_flag(fl, private) \
@@ -145,7 +145,7 @@
    value is zero.  In case the operation failed, the cmpxchg instruction
    has loaded the current value of the memory work which is guaranteed
    to be nonzero.  */
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_trylock_asm LOCK_INSTR "cmpxchgl %2, %1"
 #else
 # define __lll_trylock_asm "cmpl $0, __libc_multiple_threads(%%rip)\n\t"      \
@@ -174,7 +174,7 @@
 		       : "memory");					      \
      ret; })
 
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_lock_asm_start LOCK_INSTR "cmpxchgl %4, %2\n\t"		      \
 			      "jz 24f\n\t"
 #else
@@ -316,7 +316,7 @@ extern int __lll_timedlock_elision (int *futex, short *adapt_count,
 		       : "memory", "cx", "cc", "r10", "r11");		      \
      result; })
 
-#if defined NOT_IN_libc || defined UP
+#if !IS_IN (libc) || defined UP
 # define __lll_unlock_asm_start LOCK_INSTR "decl %0\n\t"		      \
 				"je 24f\n\t"
 #else
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
index 2667292..cecaec1 100644
--- a/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
+#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
 
 /* The code to disable cancellation depends on the fact that the called
    functions are special.  They don't modify registers other than %rax
@@ -63,7 +63,7 @@
 #  define CENABLE	call __pthread_enable_asynccancel;
 #  define CDISABLE	call __pthread_disable_asynccancel;
 #  define __local_multiple_threads __pthread_multiple_threads
-# elif !defined NOT_IN_libc
+# elif IS_IN (libc)
 #  define CENABLE	call __libc_enable_asynccancel;
 #  define CDISABLE	call __libc_disable_asynccancel;
 #  define __local_multiple_threads __libc_multiple_threads
@@ -74,7 +74,7 @@
 #  error Unsupported library
 # endif
 
-# if IS_IN (libpthread) || !defined NOT_IN_libc
+# if IS_IN (libpthread) || IS_IN (libc)
 #  ifndef __ASSEMBLER__
 extern int __local_multiple_threads attribute_hidden;
 #   define SINGLE_THREAD_P \
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
index 6377183..16c497b 100644
--- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
@@ -115,7 +115,7 @@
   neg %eax;					\
   movl %eax, (%rcx)
 # else
-#  ifndef NOT_IN_libc
+#  if IS_IN (libc)
 #   define SYSCALL_ERROR_ERRNO __libc_errno
 #  else
 #   define SYSCALL_ERROR_ERRNO errno
diff --git a/sysdeps/wordsize-32/symbol-hacks.h b/sysdeps/wordsize-32/symbol-hacks.h
index 11e4701..38b2b74 100644
--- a/sysdeps/wordsize-32/symbol-hacks.h
+++ b/sysdeps/wordsize-32/symbol-hacks.h
@@ -23,7 +23,7 @@
    therefore we get PLTs.  Unnecessarily so.  Changing gcc is a big
    task which might not be worth it so we play tricks with the
    assembler.  */
-#if !defined __ASSEMBLER__ && !defined in_divdi3_c && !defined NOT_IN_libc && defined SHARED
+#if !defined __ASSEMBLER__ && !defined in_divdi3_c && IS_IN (libc) && defined SHARED
 asm ("__divdi3 = __divdi3_internal");
 asm ("__udivdi3 = __udivdi3_internal");
 asm ("__moddi3 = __moddi3_internal");
diff --git a/sysdeps/x86_64/memcpy.S b/sysdeps/x86_64/memcpy.S
index 60f3c65..2c9aa5a 100644
--- a/sysdeps/x86_64/memcpy.S
+++ b/sysdeps/x86_64/memcpy.S
@@ -30,7 +30,7 @@
 #  define RETVAL	(0)
 #else
 #  define RETVAL	(-8)
-#  if defined SHARED && !defined USE_MULTIARCH && !defined NOT_IN_libc
+#  if defined SHARED && !defined USE_MULTIARCH && IS_IN (libc)
 #    define memcpy	__memcpy
 #    undef libc_hidden_builtin_def
 #    define libc_hidden_builtin_def(name) \
@@ -44,7 +44,7 @@
 
         .text
 
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && IS_IN (libc)
 ENTRY_CHK (__memcpy_chk)
 
 	cmpq	%rdx, %rcx
@@ -253,14 +253,14 @@ L(32after):
 /* Handle blocks smaller than 1/2 L1. */
 
 L(fasttry):				/* first 1/2 L1 */
-#ifndef NOT_IN_libc			/* only up to this algorithm outside of libc.so */
+#if IS_IN (libc)			/* only up to this algorithm outside of libc.so */
 	mov	__x86_data_cache_size_half(%rip), %R11_LP
 	cmpq	%rdx, %r11		/* calculate the smaller of */
 	cmovaq	%rdx, %r11		/* remaining bytes and 1/2 L1 */
 #endif
 
 L(fast):				/* good ol' MOVS */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	movq	%r11, %rcx
 	andq	$-8, %r11
 #else
@@ -275,7 +275,7 @@ L(fast):				/* good ol' MOVS */
 	.p2align 4,, 4
 
 L(fastskip):
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	subq	%r11, %rdx		/* check for more */
 	testq	$-8, %rdx
 	jnz	L(fastafter)
@@ -294,7 +294,7 @@ L(fastskip):
 #endif
 	retq				/* exit */
 
-#ifndef NOT_IN_libc			/* none of the algorithms below for RTLD */
+#if IS_IN (libc)			/* none of the algorithms below for RTLD */
 
 	.p2align 4
 
@@ -570,13 +570,13 @@ L(NTskip):
 #endif
 	retq				/* exit */
 
-#endif /* !NOT_IN_libc */
+#endif /* IS_IN (libc) */
 
 END(memcpy)
 
 #ifndef USE_AS_MEMPCPY
 libc_hidden_builtin_def (memcpy)
-# if defined SHARED && !defined USE_MULTIARCH && !defined NOT_IN_libc
+# if defined SHARED && !defined USE_MULTIARCH && IS_IN (libc)
 #  undef memcpy
 #  include <shlib-compat.h>
 versioned_symbol (libc, __memcpy, memcpy, GLIBC_2_14);
diff --git a/sysdeps/x86_64/memmove.c b/sysdeps/x86_64/memmove.c
index 202f5b8..d538eba 100644
--- a/sysdeps/x86_64/memmove.c
+++ b/sysdeps/x86_64/memmove.c
@@ -17,7 +17,7 @@
 
 #include "string/memmove.c"
 
-#if !defined memmove && !defined NOT_IN_libc
+#if !defined memmove && IS_IN (libc)
 #include <shlib-compat.h>
 
 #if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
diff --git a/sysdeps/x86_64/memset.S b/sysdeps/x86_64/memset.S
index db4fb84..7fec577 100644
--- a/sysdeps/x86_64/memset.S
+++ b/sysdeps/x86_64/memset.S
@@ -20,7 +20,7 @@
 #include <sysdep.h>
 
 	.text
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 ENTRY(__bzero)
 	movq	%rdi, %rax /* Set return value.  */
 	movq	%rsi, %rdx /* Set n.  */
@@ -42,7 +42,7 @@ ENTRY(__memset_tail)
 END(__memset_tail)
 #endif
 
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && IS_IN (libc)
 ENTRY_CHK (__memset_chk)
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
@@ -125,7 +125,7 @@ L(between8_16bytes):
 END (memset)
 libc_hidden_builtin_def (memset)
 
-#if defined PIC && !defined NOT_IN_libc && !defined USE_MULTIARCH
+#if defined PIC && IS_IN (libc) && !defined USE_MULTIARCH
 strong_alias (__memset_chk, __memset_zero_constant_len_parameter)
 	.section .gnu.warning.__memset_zero_constant_len_parameter
 	.string "memset used with constant zero length parameter; this could be due to transposed parameters"
diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h
index ef0abbd..c701edd 100644
--- a/sysdeps/x86_64/multiarch/init-arch.h
+++ b/sysdeps/x86_64/multiarch/init-arch.h
@@ -122,7 +122,7 @@ extern void __init_cpu_features (void) attribute_hidden;
 extern const struct cpu_features *__get_cpu_features (void)
      __attribute__ ((const));
 
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 #  define __get_cpu_features()	(&__cpu_features)
 # endif
 
diff --git a/sysdeps/x86_64/multiarch/memcmp-sse4.S b/sysdeps/x86_64/multiarch/memcmp-sse4.S
index e753d62..e747e97 100644
--- a/sysdeps/x86_64/multiarch/memcmp-sse4.S
+++ b/sysdeps/x86_64/multiarch/memcmp-sse4.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/x86_64/multiarch/memcmp-ssse3.S b/sysdeps/x86_64/multiarch/memcmp-ssse3.S
index 5f7572f..82297ed 100644
--- a/sysdeps/x86_64/multiarch/memcmp-ssse3.S
+++ b/sysdeps/x86_64/multiarch/memcmp-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/x86_64/multiarch/memcmp.S b/sysdeps/x86_64/multiarch/memcmp.S
index 627d8d0..f0beaeb 100644
--- a/sysdeps/x86_64/multiarch/memcmp.S
+++ b/sysdeps/x86_64/multiarch/memcmp.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(memcmp)
 	.type	memcmp, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S b/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
index 3cac1e3..eb5de25 100644
--- a/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
+++ b/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc \
+#if IS_IN (libc) \
     && (defined SHARED \
         || defined USE_AS_MEMMOVE \
 	|| !defined USE_MULTIARCH)
diff --git a/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S b/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S
index 899ccbc..2fa465b 100644
--- a/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S
+++ b/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S
@@ -19,7 +19,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc \
+#if IS_IN (libc) \
     && (defined SHARED \
         || defined USE_AS_MEMMOVE \
 	|| !defined USE_MULTIARCH)
diff --git a/sysdeps/x86_64/multiarch/memcpy-ssse3.S b/sysdeps/x86_64/multiarch/memcpy-ssse3.S
index 0ad9a00..7d0755e 100644
--- a/sysdeps/x86_64/multiarch/memcpy-ssse3.S
+++ b/sysdeps/x86_64/multiarch/memcpy-ssse3.S
@@ -19,7 +19,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc \
+#if IS_IN (libc) \
     && (defined SHARED \
         || defined USE_AS_MEMMOVE \
 	|| !defined USE_MULTIARCH)
diff --git a/sysdeps/x86_64/multiarch/memcpy.S b/sysdeps/x86_64/multiarch/memcpy.S
index e666695..1523313 100644
--- a/sysdeps/x86_64/multiarch/memcpy.S
+++ b/sysdeps/x86_64/multiarch/memcpy.S
@@ -25,7 +25,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need memcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 	.text
 ENTRY(__new_memcpy)
 	.type	__new_memcpy, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/memcpy_chk.S b/sysdeps/x86_64/multiarch/memcpy_chk.S
index 076b19a..ded14ab 100644
--- a/sysdeps/x86_64/multiarch/memcpy_chk.S
+++ b/sysdeps/x86_64/multiarch/memcpy_chk.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  There are no multiarch memcpy functions for static binaries.
  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__memcpy_chk)
diff --git a/sysdeps/x86_64/multiarch/memmove.c b/sysdeps/x86_64/multiarch/memmove.c
index 0c9af7e..31d00f8 100644
--- a/sysdeps/x86_64/multiarch/memmove.c
+++ b/sysdeps/x86_64/multiarch/memmove.c
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define MEMMOVE __memmove_sse2
 # ifdef SHARED
 #  undef libc_hidden_builtin_def
@@ -41,7 +41,7 @@ extern __typeof (__redirect_memmove) __memmove_avx_unaligned attribute_hidden;
 
 #include "string/memmove.c"
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <shlib-compat.h>
 # include "init-arch.h"
 
diff --git a/sysdeps/x86_64/multiarch/mempcpy.S b/sysdeps/x86_64/multiarch/mempcpy.S
index 7589d8c..3b7bdb0 100644
--- a/sysdeps/x86_64/multiarch/mempcpy.S
+++ b/sysdeps/x86_64/multiarch/mempcpy.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  In static binaries we need mempcpy before the initialization
    happened.  */
-#if defined SHARED && !defined NOT_IN_libc
+#if defined SHARED && IS_IN (libc)
 ENTRY(__mempcpy)
 	.type	__mempcpy, @gnu_indirect_function
 	cmpl	$0, KIND_OFFSET+__cpu_features(%rip)
diff --git a/sysdeps/x86_64/multiarch/mempcpy_chk.S b/sysdeps/x86_64/multiarch/mempcpy_chk.S
index 88e0b74..c0d33fe 100644
--- a/sysdeps/x86_64/multiarch/mempcpy_chk.S
+++ b/sysdeps/x86_64/multiarch/mempcpy_chk.S
@@ -24,7 +24,7 @@
 /* Define multiple versions only for the definition in lib and for
    DSO.  There are no multiarch mempcpy functions for static binaries.
  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # ifdef SHARED
 	.text
 ENTRY(__mempcpy_chk)
diff --git a/sysdeps/x86_64/multiarch/memset-avx2.S b/sysdeps/x86_64/multiarch/memset-avx2.S
index b45f8a0..0de0800 100644
--- a/sysdeps/x86_64/multiarch/memset-avx2.S
+++ b/sysdeps/x86_64/multiarch/memset-avx2.S
@@ -18,7 +18,7 @@
 
 #include <sysdep.h>
 
-#if !defined NOT_IN_libc
+#if IS_IN (libc)
 
 #include "asm-syntax.h"
 #ifndef MEMSET
diff --git a/sysdeps/x86_64/multiarch/memset.S b/sysdeps/x86_64/multiarch/memset.S
index 00d46d1..61868c7 100644
--- a/sysdeps/x86_64/multiarch/memset.S
+++ b/sysdeps/x86_64/multiarch/memset.S
@@ -23,7 +23,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-# ifndef NOT_IN_libc
+# if IS_IN (libc)
 ENTRY(memset)
 	.type	memset, @gnu_indirect_function
 	cmpl	$0, __cpu_features+KIND_OFFSET(%rip)
@@ -37,7 +37,7 @@ ENTRY(memset)
 END(memset)
 # endif
 
-# if !defined NOT_IN_libc
+# if IS_IN (libc)
 #  undef memset
 #  define memset __memset_sse2
 
diff --git a/sysdeps/x86_64/multiarch/memset_chk.S b/sysdeps/x86_64/multiarch/memset_chk.S
index 8a607bd..7528a42 100644
--- a/sysdeps/x86_64/multiarch/memset_chk.S
+++ b/sysdeps/x86_64/multiarch/memset_chk.S
@@ -21,7 +21,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in lib.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # if defined SHARED && defined HAVE_AVX2_SUPPORT
 ENTRY(__memset_chk)
 	.type	__memset_chk, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S b/sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S
index dc782f2..9b8db7a 100644
--- a/sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S
+++ b/sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/x86_64/multiarch/strcat-ssse3.S b/sysdeps/x86_64/multiarch/strcat-ssse3.S
index fde7b90..9448125 100644
--- a/sysdeps/x86_64/multiarch/strcat-ssse3.S
+++ b/sysdeps/x86_64/multiarch/strcat-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 
diff --git a/sysdeps/x86_64/multiarch/strcat.S b/sysdeps/x86_64/multiarch/strcat.S
index d5c9d84..5318780 100644
--- a/sysdeps/x86_64/multiarch/strcat.S
+++ b/sysdeps/x86_64/multiarch/strcat.S
@@ -43,7 +43,7 @@
 
 
 /* Define multiple versions only for the definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(STRCAT)
 	.type	STRCAT, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strchr-sse2-no-bsf.S b/sysdeps/x86_64/multiarch/strchr-sse2-no-bsf.S
index 0b3f096..7870494 100644
--- a/sysdeps/x86_64/multiarch/strchr-sse2-no-bsf.S
+++ b/sysdeps/x86_64/multiarch/strchr-sse2-no-bsf.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef  NOT_IN_libc
+#if IS_IN (libc)
 
 # include <sysdep.h>
 # include "asm-syntax.h"
diff --git a/sysdeps/x86_64/multiarch/strchr.S b/sysdeps/x86_64/multiarch/strchr.S
index 63a35fa..3f247b6 100644
--- a/sysdeps/x86_64/multiarch/strchr.S
+++ b/sysdeps/x86_64/multiarch/strchr.S
@@ -21,7 +21,7 @@
 
 
 /* Define multiple versions only for the definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(strchr)
 	.type	strchr, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strcmp-ssse3.S b/sysdeps/x86_64/multiarch/strcmp-ssse3.S
index 43b3f30..1b7fa33 100644
--- a/sysdeps/x86_64/multiarch/strcmp-ssse3.S
+++ b/sysdeps/x86_64/multiarch/strcmp-ssse3.S
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define USE_SSSE3 1
 # define STRCMP __strcmp_ssse3
 # include "../strcmp.S"
diff --git a/sysdeps/x86_64/multiarch/strcmp.S b/sysdeps/x86_64/multiarch/strcmp.S
index f3e0ca1..84b97fa 100644
--- a/sysdeps/x86_64/multiarch/strcmp.S
+++ b/sysdeps/x86_64/multiarch/strcmp.S
@@ -80,7 +80,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strncmp in static library since we
    need strncmp before the initialization happened.  */
-#if (defined SHARED || !defined USE_AS_STRNCMP) && !defined NOT_IN_libc
+#if (defined SHARED || !defined USE_AS_STRNCMP) && IS_IN (libc)
 	.text
 ENTRY(STRCMP)
 	.type	STRCMP, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S b/sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S
index be7513d..d616d1a 100644
--- a/sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S
+++ b/sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # ifndef USE_AS_STRCAT
 #  include <sysdep.h>
diff --git a/sysdeps/x86_64/multiarch/strcpy-ssse3.S b/sysdeps/x86_64/multiarch/strcpy-ssse3.S
index 86569ff..7ca044d 100644
--- a/sysdeps/x86_64/multiarch/strcpy-ssse3.S
+++ b/sysdeps/x86_64/multiarch/strcpy-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 # ifndef USE_AS_STRCAT
 #  include <sysdep.h>
diff --git a/sysdeps/x86_64/multiarch/strcpy.S b/sysdeps/x86_64/multiarch/strcpy.S
index 80ed98b..0467b21 100644
--- a/sysdeps/x86_64/multiarch/strcpy.S
+++ b/sysdeps/x86_64/multiarch/strcpy.S
@@ -57,7 +57,7 @@
 
 
 /* Define multiple versions only for the definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(STRCPY)
 	.type	STRCPY, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strcspn.S b/sysdeps/x86_64/multiarch/strcspn.S
index 24f55e9..1250dc8 100644
--- a/sysdeps/x86_64/multiarch/strcspn.S
+++ b/sysdeps/x86_64/multiarch/strcspn.S
@@ -41,7 +41,7 @@
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strpbrk in static library since we
    need strpbrk before the initialization happened.  */
-#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc
+#if (defined SHARED || !defined USE_AS_STRPBRK) && IS_IN (libc)
 	.text
 ENTRY(STRCSPN)
 	.type	STRCSPN, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/strspn.S b/sysdeps/x86_64/multiarch/strspn.S
index bf7308e..6630926 100644
--- a/sysdeps/x86_64/multiarch/strspn.S
+++ b/sysdeps/x86_64/multiarch/strspn.S
@@ -26,7 +26,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc.  */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(strspn)
 	.type	strspn, @gnu_indirect_function
diff --git a/sysdeps/x86_64/multiarch/wcscpy-c.c b/sysdeps/x86_64/multiarch/wcscpy-c.c
index f27c069..a51a83a 100644
--- a/sysdeps/x86_64/multiarch/wcscpy-c.c
+++ b/sysdeps/x86_64/multiarch/wcscpy-c.c
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # define wcscpy  __wcscpy_sse2
 #endif
 
diff --git a/sysdeps/x86_64/multiarch/wcscpy-ssse3.S b/sysdeps/x86_64/multiarch/wcscpy-ssse3.S
index c79389e..5b188ac 100644
--- a/sysdeps/x86_64/multiarch/wcscpy-ssse3.S
+++ b/sysdeps/x86_64/multiarch/wcscpy-ssse3.S
@@ -17,7 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <sysdep.h>
 
 	.section .text.ssse3,"ax",@progbits
diff --git a/sysdeps/x86_64/multiarch/wcscpy.S b/sysdeps/x86_64/multiarch/wcscpy.S
index f12ba27..43ffe6d 100644
--- a/sysdeps/x86_64/multiarch/wcscpy.S
+++ b/sysdeps/x86_64/multiarch/wcscpy.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 
 	.text
 ENTRY(wcscpy)
diff --git a/sysdeps/x86_64/multiarch/wmemcmp-c.c b/sysdeps/x86_64/multiarch/wmemcmp-c.c
index 1074238..46b6715 100644
--- a/sysdeps/x86_64/multiarch/wmemcmp-c.c
+++ b/sysdeps/x86_64/multiarch/wmemcmp-c.c
@@ -1,4 +1,4 @@
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 # include <wchar.h>
 
 # define WMEMCMP  __wmemcmp_sse2
diff --git a/sysdeps/x86_64/multiarch/wmemcmp.S b/sysdeps/x86_64/multiarch/wmemcmp.S
index 37b9bba..c5b211d 100644
--- a/sysdeps/x86_64/multiarch/wmemcmp.S
+++ b/sysdeps/x86_64/multiarch/wmemcmp.S
@@ -22,7 +22,7 @@
 #include <init-arch.h>
 
 /* Define multiple versions only for the definition in libc. */
-#ifndef NOT_IN_libc
+#if IS_IN (libc)
 	.text
 ENTRY(wmemcmp)
 	.type	wmemcmp, @gnu_indirect_function
diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S
index fc45a62..b022a04 100644
--- a/sysdeps/x86_64/strcmp.S
+++ b/sysdeps/x86_64/strcmp.S
@@ -32,7 +32,7 @@
 /* The simplified code below is not set up to handle strncmp() so far.
    Should this become necessary it has to be implemented.  For now
    just report the problem.  */
-# ifdef NOT_IN_libc
+# if !IS_IN (libc)
 #  error "strncmp not implemented so far"
 # endif
 
@@ -51,7 +51,7 @@
 # include "locale-defines.h"
 
 /* No support for strcasecmp outside libc so far since it is not needed.  */
-# ifdef NOT_IN_libc
+# if !IS_IN (libc)
 #  error "strcasecmp_l not implemented so far"
 # endif
 
@@ -60,7 +60,7 @@
 # include "locale-defines.h"
 
 /* No support for strncasecmp outside libc so far since it is not needed.  */
-# ifdef NOT_IN_libc
+# if !IS_IN (libc)
 #  error "strncasecmp_l not implemented so far"
 # endif
 
@@ -126,7 +126,7 @@ libc_hidden_def (__strncasecmp)
 #endif
 
 ENTRY (STRCMP)
-#ifdef NOT_IN_libc
+#if !IS_IN (libc)
 /* Simple version since we can't use SSE registers in ld.so.  */
 L(oop):	movb	(%rdi), %al
 	cmpb	(%rsi), %al
@@ -144,7 +144,7 @@ L(neq):	movl	$1, %eax
 	cmovbl	%ecx, %eax
 	ret
 END (STRCMP)
-#else	/* NOT_IN_libc */
+#else	/* !IS_IN (libc) */
 # ifdef USE_AS_STRCASECMP_L
 	/* We have to fall back on the C implementation for locales
 	   with encodings not matching ASCII for single bytes.  */
@@ -2300,5 +2300,5 @@ LABEL(unaligned_table):
 	.int	LABEL(ashr_14) - LABEL(unaligned_table)
 	.int	LABEL(ashr_15) - LABEL(unaligned_table)
 	.int	LABEL(ashr_0) - LABEL(unaligned_table)
-#endif /* NOT_IN_libc */
+#endif /* !IS_IN (libc) */
 libc_hidden_builtin_def (STRCMP)
