diff --git a/include/mqueue.h b/include/mqueue.h
index 1ac4f13..aba788e 100644
--- a/include/mqueue.h
+++ b/include/mqueue.h
@@ -1,6 +1,6 @@
 #include <rt/mqueue.h>
 
-#ifdef IS_IN_librt
+#if IS_IN (librt)
 hidden_proto (mq_timedsend)
 hidden_proto (mq_timedreceive)
 hidden_proto (mq_setattr)
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index d4415ba..2f13ea5 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -302,7 +302,7 @@ __do_cancel (void)
 # define LIBC_CANCEL_HANDLED() \
   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
-#elif defined IS_IN_librt
+#elif IS_IN (librt)
 # define LIBC_CANCEL_ASYNC() \
   __librt_enable_asynccancel ()
 # define LIBC_CANCEL_RESET(val) \
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h
index 546ed7b..9e347de 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				\
@@ -89,7 +89,7 @@ ENTRY (name);								\
 #  define CENABLE	bl __libc_enable_asynccancel
 #  define CDISABLE	bl __libc_disable_asynccancel
 #  define __local_multiple_threads __libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	bl __librt_enable_asynccancel
 #  define CDISABLE	bl __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h b/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
index 69809bc..45bf93b 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 /* ??? Assumes that nothing comes between PSEUDO and PSEUDO_END
    besides "ret".  */
@@ -121,7 +121,7 @@ __LABEL($multi_error)						\
 #  define __local_enable_asynccancel	__libc_enable_asynccancel
 #  define __local_disable_asynccancel	__libc_disable_asynccancel
 #  define __local_multiple_threads	__libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define __local_enable_asynccancel	__librt_enable_asynccancel
 #  define __local_disable_asynccancel	__librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h b/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
index a0a8696..e5a8e36 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined 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
@@ -189,7 +189,7 @@
 #  define CENABLE	bl PLTJMP(__libc_enable_asynccancel)
 #  define CDISABLE	bl PLTJMP(__libc_disable_asynccancel)
 #  define __local_multiple_threads __libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	bl PLTJMP(__librt_enable_asynccancel)
 #  define CDISABLE	bl PLTJMP(__librt_disable_asynccancel)
 # else
diff --git a/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h b/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
index 6f1c9d7..365237e 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # ifndef NO_ERROR
 #  define NO_ERROR -0x1000
@@ -228,7 +228,7 @@ L(pre_end):						ASM_LINE_SEP	\
 #   define CDISABLE	.import __libc_disable_asynccancel,code ASM_LINE_SEP \
 			bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP
 #  endif
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  ifdef PIC
 #   define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \
 			bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP
@@ -248,7 +248,7 @@ L(pre_end):						ASM_LINE_SEP	\
 #  define __local_multiple_threads __pthread_multiple_threads
 # elif !defined NOT_IN_libc
 #  define __local_multiple_threads __libc_multiple_threads
-# elif IS_IN_librt
+# elif IS_IN (librt)
 #  define __local_multiple_threads __librt_multiple_threads
 # else
 #  error Unsupported library
@@ -271,7 +271,7 @@ L(pre_end):						ASM_LINE_SEP	\
 # define NO_CANCELLATION 1
 
 #endif
-/* !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt */
+/* !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt) */
 
 #ifndef __ASSEMBLER__
 # define RTLD_SINGLE_THREAD_P \
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h b/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
index 4f4318d..75fe2e6 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -114,7 +114,7 @@
 # elif !defined NOT_IN_libc
 #  define CENABLE	call __libc_enable_asynccancel;
 #  define CDISABLE	call __libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	call __librt_enable_asynccancel;
 #  define CDISABLE	call __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
index c44c484..366728f 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h
@@ -22,7 +22,7 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 
@@ -185,7 +185,7 @@ __GC_##name:								      \
 # elif !defined NOT_IN_libc
 #  define CENABLE	br.call.sptk.many b0 = __libc_enable_asynccancel
 #  define CDISABLE	br.call.sptk.many b0 = __libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	br.call.sptk.many b0 = __librt_enable_asynccancel
 #  define CDISABLE	br.call.sptk.many b0 = __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h
index e0ec861..49d289c 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h
@@ -62,7 +62,7 @@
 
 #if defined USE_DL_SYSINFO \
 	&& (!defined NOT_IN_libc \
-	    || defined IS_IN_libpthread || defined IS_IN_librt)
+	    || defined IS_IN_libpthread || IS_IN (librt))
 # define IA64_USE_NEW_STUB
 #else
 # undef IA64_USE_NEW_STUB
diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h b/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h
index 868ce56..0e19a38 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -106,7 +106,7 @@
 # elif !defined NOT_IN_libc
 #  define CENABLE	PSEUDO_JMP (__libc_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__libc_disable_asynccancel)
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	PSEUDO_JMP (__librt_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__librt_disable_asynccancel)
 # else
diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h b/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
index 0080d8d..4d371ef 100644
--- a/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h
@@ -21,9 +21,9 @@
 # include <nptl/pthreadP.h>
 #endif
 
-#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
-# if !defined(IS_IN_librt) || !defined(PIC)
+# if !IS_IN (librt) || !defined(PIC)
 #  define AC_STACK_SIZE  16  /* space for r15, async_cancel arg and 2 temp words */
 #  define AC_SET_GOT /* empty */
 #  define AC_RESTORE_GOT /* empty */
@@ -110,7 +110,7 @@ L(pseudo_cancel):                                                    \
 #  define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
 #  define CDISABLE  PSEUDO_JMP (__libc_disable_asynccancel)
 #  define __local_multiple_threads __libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
 #  define CDISABLE  PSEUDO_JMP (__librt_disable_asynccancel)
 # else
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
index 341b9a0..acbc5da 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 #ifdef __PIC__
 # undef PSEUDO
@@ -216,7 +216,7 @@
 # ifdef IS_IN_libpthread
 #  define CENABLE	PSEUDO_JMP (__pthread_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__pthread_disable_asynccancel)
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	PSEUDO_JMP (__librt_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__librt_disable_asynccancel)
 # else
diff --git a/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h b/sysdeps/unix/sysv/linux/mips/sysdep-cancel.h
index 3666081..5fdd567 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # ifdef __PIC__
 #  define PSEUDO_CPLOAD .cpload t9;
@@ -157,7 +157,7 @@
 # ifdef IS_IN_libpthread
 #  define CENABLE	PSEUDO_JMP (__pthread_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__pthread_disable_asynccancel)
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	PSEUDO_JMP (__librt_enable_asynccancel)
 #  define CDISABLE	PSEUDO_JMP (__librt_disable_asynccancel)
 # else
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index 14f5e8b..d089531 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined 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/powerpc32/sysdep-cancel.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
index b6eedcb..962beaf 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				\
@@ -87,7 +87,7 @@
 # elif !defined NOT_IN_libc
 #  define CENABLE	bl __libc_enable_asynccancel@local
 #  define CDISABLE	bl __libc_disable_asynccancel@local
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	bl __librt_enable_asynccancel@local
 #  define CDISABLE	bl __librt_disable_asynccancel@local
 # else
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h
index 5807d9d..0447062 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # ifdef HAVE_ASM_GLOBAL_DOT_NAME
 #  define DASHDASHPFX(str) .__##str
@@ -115,7 +115,7 @@
 #   define CENABLE	bl JUMPTARGET(__libc_enable_asynccancel); nop
 #   define CDISABLE	bl JUMPTARGET(__libc_disable_asynccancel); nop
 #  endif
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  ifdef SHARED
 #   define CENABLE	bl JUMPTARGET(__librt_enable_asynccancel)
 #   define CDISABLE	bl JUMPTARGET(__librt_disable_asynccancel)
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 0eeefca..bc5d852 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -81,7 +81,7 @@ L(pseudo_end):
 # elif !defined NOT_IN_libc
 #  define CENABLE	__libc_enable_asynccancel
 #  define CDISABLE	__libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	__librt_enable_asynccancel
 #  define CDISABLE	__librt_disable_asynccancel
 # else
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 b3560c8..885bf7e 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)				      \
@@ -77,7 +77,7 @@ L(pseudo_end):
 #  define CENABLE	__libc_enable_asynccancel
 #  define CDISABLE	__libc_disable_asynccancel
 #  define __local_multiple_threads	__libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	__librt_enable_asynccancel
 #  define CDISABLE	__librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
index 4278f25..4ef51c0 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # define _IMM12 #-12
 # define _IMM16 #-16
@@ -111,7 +111,7 @@
 # elif !defined NOT_IN_libc
 #  define __local_enable_asynccancel	__libc_enable_asynccancel
 #  define __local_disable_asynccancel	__libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define __local_enable_asynccancel	__librt_enable_asynccancel
 #  define __local_disable_asynccancel	__librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h
index fd9968f..2e24d2a 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)	\
@@ -74,7 +74,7 @@ __##syscall_name##_nocancel:			\
 # elif !defined NOT_IN_libc
 #  define CENABLE	call __libc_enable_asynccancel
 #  define CDISABLE	call __libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	call __librt_enable_asynccancel
 #  define CDISABLE	call __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h
index 4dad994..0ae3b61 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 # undef PSEUDO
 # define PSEUDO(name, syscall_name, args)	\
@@ -72,7 +72,7 @@ __##syscall_name##_nocancel:			\
 # elif !defined NOT_IN_libc
 #  define CENABLE	call __libc_enable_asynccancel
 #  define CDISABLE	call __libc_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	call __librt_enable_asynccancel
 #  define CDISABLE	call __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h b/sysdeps/unix/sysv/linux/tile/sysdep-cancel.h
index 2333338..8140273 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || IS_IN (librt)
 
 /* Allow hacking in some extra code if desired. */
 #ifndef PSEUDO_EXTRA
@@ -120,7 +120,7 @@
 # ifdef IS_IN_libpthread
 #  define CENABLE	jal __pthread_enable_asynccancel
 #  define CDISABLE	jal __pthread_disable_asynccancel
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	jal __librt_enable_asynccancel
 #  define CDISABLE	jal __librt_disable_asynccancel
 # else
diff --git a/sysdeps/unix/sysv/linux/tile/waitpid.S b/sysdeps/unix/sysv/linux/tile/waitpid.S
index 9aa793e..ac8e59e 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined 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/sysdep-cancel.h b/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
index 83cd25f..efdb1c6 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 || defined IS_IN_libpthread || defined IS_IN_librt
+#if !defined NOT_IN_libc || defined 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
@@ -67,7 +67,7 @@
 #  define CENABLE	call __libc_enable_asynccancel;
 #  define CDISABLE	call __libc_disable_asynccancel;
 #  define __local_multiple_threads __libc_multiple_threads
-# elif defined IS_IN_librt
+# elif IS_IN (librt)
 #  define CENABLE	call __librt_enable_asynccancel;
 #  define CDISABLE	call __librt_disable_asynccancel;
 # else
