[1/7] configure: Move locale tools early

Message ID 20221115193159.173838-2-adhemerval.zanella@linaro.org
State New
Headers
Series Fixing remaining lld issues |

Checks

Context Check Description
dj/TryBot-apply_patch success Patch applied to master at the time it was sent

Commit Message

Adhemerval Zanella Netto Nov. 15, 2022, 7:31 p.m. UTC
  When using --with-binutils, the configure might not use the specified
linker or assembler while checking for expected support.  Move the
tools check early, before any compiler usage test.
---
 configure    | 2304 +++++++++++++++++++++++++-------------------------
 configure.ac |  238 +++---
 2 files changed, 1271 insertions(+), 1271 deletions(-)
  

Patch

diff --git a/configure b/configure
index cb0996d59e..9a8acc4ef7 100755
--- a/configure
+++ b/configure
@@ -635,6 +635,14 @@  CXX_CMATH_HEADER
 CXX_CSTDLIB_HEADER
 CXX_SYSINCLUDES
 SYSINCLUDES
+sysnames
+submachine
+multi_arch
+libc_cv_textrel_ifunc
+no_stack_protector
+stack_protector
+libc_cv_ssp
+libc_cv_with_fp
 PYTHON
 PYTHON_PROG
 AUTOCONF
@@ -654,14 +662,6 @@  LN_S
 INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
-sysnames
-submachine
-multi_arch
-libc_cv_textrel_ifunc
-no_stack_protector
-stack_protector
-libc_cv_ssp
-libc_cv_with_fp
 base_machine
 have_tunables
 build_pt_chown
@@ -4025,709 +4025,646 @@  fi
 test -n "$base_machine" || base_machine=$machine
 
 
-# Determine whether to use fpu or nofpu sysdeps directories.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for use of fpu sysdeps directories" >&5
-$as_echo_n "checking for use of fpu sysdeps directories... " >&6; }
-if ${libc_cv_with_fp+:} false; then :
+### Locate tools.
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+$as_echo_n "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if ${ac_cv_path_install+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  cat > conftest.c <<EOF
-#if $with_fp_cond
-int dummy;
-#else
-# error "no hardware floating point"
-#endif
-EOF
-libc_cv_with_fp=no
-if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \
-   1>&5 2>&5 ; then
-  libc_cv_with_fp=yes
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in #((
+  ./ | .// | /[cC]/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+  done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
 fi
-rm -f conftest*
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_with_fp" >&5
-$as_echo "$libc_cv_with_fp" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+$as_echo "$INSTALL" >&6; }
 
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector" >&5
-$as_echo_n "checking for -fstack-protector... " >&6; }
-if ${libc_cv_ssp+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector -xc /dev/null -S -o /dev/null'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  libc_cv_ssp=yes
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
+  # The makefiles need to use a different form to find it in $srcdir.
+  INSTALL='\$(..)./scripts/install-sh -c'
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+$as_echo_n "checking whether ln -s works... " >&6; }
+LN_S=$as_ln_s
+if test "$LN_S" = "ln -s"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
 else
-  libc_cv_ssp=no
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+$as_echo "no, using $LN_S" >&6; }
 fi
 
+
+# Was a --with-binutils option given?
+if test -n "$path_binutils"; then
+    # Make absolute; ensure a single trailing slash.
+    path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
+    CC="$CC -B$path_binutils"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp" >&5
-$as_echo "$libc_cv_ssp" >&6; }
+case "$CC" in
+    *fuse-ld=lld*) LDNAME=ld.lld;;
+    *)             LDNAME=ld;;
+esac
+AS=`$CC -print-prog-name=as`
+LD=`$CC -print-prog-name=$LDNAME`
+AR=`$CC -print-prog-name=ar`
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector-strong" >&5
-$as_echo_n "checking for -fstack-protector-strong... " >&6; }
-if ${libc_cv_ssp_strong+:} false; then :
+OBJCOPY=`$CC -print-prog-name=objcopy`
+
+GPROF=`$CC -print-prog-name=gprof`
+
+
+# Determine whether we are using GNU binutils.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $AS is GNU as" >&5
+$as_echo_n "checking whether $AS is GNU as... " >&6; }
+if ${libc_cv_prog_as_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector-strong -xc /dev/null -S -o /dev/null'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  libc_cv_ssp_strong=yes
+  # Most GNU programs take a -v and spit out some text including
+# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
+if $AS -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
+  libc_cv_prog_as_gnu=yes
 else
-  libc_cv_ssp_strong=no
+  libc_cv_prog_as_gnu=no
 fi
-
+rm -fr contest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp_strong" >&5
-$as_echo "$libc_cv_ssp_strong" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_prog_as_gnu" >&5
+$as_echo "$libc_cv_prog_as_gnu" >&6; }
+rm -f a.out
+gnu_as=$libc_cv_prog_as_gnu
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector-all" >&5
-$as_echo_n "checking for -fstack-protector-all... " >&6; }
-if ${libc_cv_ssp_all+:} false; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $LD is GNU ld" >&5
+$as_echo_n "checking whether $LD is GNU ld... " >&6; }
+if ${libc_cv_prog_ld_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector-all -xc /dev/null -S -o /dev/null'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  libc_cv_ssp_all=yes
+  # Most GNU programs take a -v and spit out some text including
+# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
+if $LD -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
+  libc_cv_prog_ld_gnu=yes
 else
-  libc_cv_ssp_all=no
-fi
-
+  libc_cv_prog_ld_gnu=no
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp_all" >&5
-$as_echo "$libc_cv_ssp_all" >&6; }
-
-stack_protector=
-no_stack_protector=
-if test "$libc_cv_ssp" = yes; then
-  no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0"
-  $as_echo "#define HAVE_CC_NO_STACK_PROTECTOR 1" >>confdefs.h
-
+rm -fr contest*
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_prog_ld_gnu" >&5
+$as_echo "$libc_cv_prog_ld_gnu" >&6; }
+gnu_ld=$libc_cv_prog_ld_gnu
 
-if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then
-  stack_protector="-fstack-protector"
-  $as_echo "#define STACK_PROTECTOR_LEVEL 1" >>confdefs.h
-
-elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then
-  stack_protector="-fstack-protector-all"
-  $as_echo "#define STACK_PROTECTOR_LEVEL 2" >>confdefs.h
-
-elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then
-  stack_protector="-fstack-protector-strong"
-  $as_echo "#define STACK_PROTECTOR_LEVEL 3" >>confdefs.h
 
+# Accept binutils 2.25 or newer.
+for ac_prog in $AS
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AS+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  stack_protector="-fno-stack-protector"
-  $as_echo "#define STACK_PROTECTOR_LEVEL 0" >>confdefs.h
-
-fi
-
-
-
-
-if test -n "$stack_protector"; then
-      no_ssp=-fno-stack-protector
+  if test -n "$AS"; then
+  ac_cv_prog_AS="$AS" # Let the user override the test.
 else
-  no_ssp=
-
-  if test "$enable_stack_protector" != no; then
-    as_fn_error $? "--enable-stack-protector=$enable_stack_protector specified, but specified level of stack protection is not supported by the compiler." "$LINENO" 5
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AS="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
   fi
-fi
+done
+  done
+IFS=$as_save_IFS
 
-# For the multi-arch option we need support in the assembler & linker.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler and linker STT_GNU_IFUNC support" >&5
-$as_echo_n "checking for assembler and linker STT_GNU_IFUNC support... " >&6; }
-if ${libc_cv_ld_gnu_indirect_function+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.S <<EOF
-.type foo,%gnu_indirect_function
-foo:
-.globl _start
-_start:
-.globl __start
-__start:
-.data
-#ifdef _LP64
-.quad foo
-#else
-.long foo
-#endif
-EOF
-libc_cv_ld_gnu_indirect_function=no
-if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
-	    -nostartfiles -nostdlib $no_ssp \
-	    -o conftest conftest.S 1>&5 2>&5; then
-  # Do a link to see if the backend supports IFUNC relocs.
-  $READELF -r conftest 1>&5
-  LC_ALL=C $READELF -Wr conftest | grep -q 'IRELATIVE\|R_SPARC_JMP_IREL' && {
-    libc_cv_ld_gnu_indirect_function=yes
-  }
 fi
-rm -f conftest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ld_gnu_indirect_function" >&5
-$as_echo "$libc_cv_ld_gnu_indirect_function" >&6; }
-
-# Check if gcc supports attribute ifunc as it is used in libc_ifunc macro.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc attribute ifunc support" >&5
-$as_echo_n "checking for gcc attribute ifunc support... " >&6; }
-if ${libc_cv_gcc_indirect_function+:} false; then :
-  $as_echo_n "(cached) " >&6
+AS=$ac_cv_prog_AS
+if test -n "$AS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
+$as_echo "$AS" >&6; }
 else
-  cat > conftest.c <<EOF
-extern int func (int);
-int used_func (int a)
-{
-  return a;
-}
-static void *resolver ()
-{
-  return &used_func;
-}
-extern __typeof (func) func __attribute__ ((ifunc ("resolver")));
-EOF
-libc_cv_gcc_indirect_function=no
-if ${CC-cc} -c conftest.c -o conftest.o 1>&5 \
-   2>&5 ; then
-  if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&5; then
-    libc_cv_gcc_indirect_function=yes
-  fi
-fi
-rm -f conftest*
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_indirect_function" >&5
-$as_echo "$libc_cv_gcc_indirect_function" >&6; }
 
-# Check if linker supports textrel relocation with ifunc (used on elf/tests).
-# Note that it relies on libc_cv_ld_gnu_indirect_function test above.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the linker supports textrels along with ifunc" >&5
-$as_echo_n "checking whether the linker supports textrels along with ifunc... " >&6; }
-if ${libc_cv_textrel_ifunc+:} false; then :
-  $as_echo_n "(cached) " >&6
+
+  test -n "$AS" && break
+done
+
+if test -z "$AS"; then
+  ac_verc_fail=yes
 else
-  cat > conftest.S <<EOF
-.type foo,%gnu_indirect_function
-foo:
-.globl _start
-_start:
-.globl __start
-__start:
-.data
-#ifdef _LP64
-.quad foo
-#else
-.long foo
-#endif
-.text
-.globl address
-address:
-#ifdef _LP64
-.quad address
-#else
-.long address
-#endif
-EOF
-libc_cv_textrel_ifunc=no
-if test $libc_cv_ld_gnu_indirect_function = yes; then
-   if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp -pie -o conftest conftest.S'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
-     libc_cv_textrel_ifunc=yes
-   fi
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AS" >&5
+$as_echo_n "checking version of $AS... " >&6; }
+  ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
 fi
-rm -f conftest*
+if test $ac_verc_fail = yes; then
+  AS=: critic_missing="$critic_missing as"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_textrel_ifunc" >&5
-$as_echo "$libc_cv_textrel_ifunc" >&6; }
 
 
-# Check if CC supports attribute retain as it is used in attribute_used_retain macro.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU attribute retain support" >&5
-$as_echo_n "checking for GNU attribute retain support... " >&6; }
-if ${libc_cv_gnu_retain+:} false; then :
+libc_cv_with_lld=no
+case $($LD --version) in
+  "GNU gold"*)
+  # Accept gold 1.14 or higher
+    for ac_prog in $LD
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_LD+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  cat > conftest.c <<EOF
-static int var  __attribute__ ((used, retain, section ("__libc_atexit")));
-EOF
-libc_cv_gnu_retain=no
-if ${CC-cc} -Werror -c conftest.c -o /dev/null 1>&5 \
-   2>&5 ; then
-  libc_cv_gnu_retain=yes
+  if test -n "$LD"; then
+  ac_cv_prog_LD="$LD" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_LD="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
 fi
-rm -f conftest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gnu_retain" >&5
-$as_echo "$libc_cv_gnu_retain" >&6; }
-if test $libc_cv_gnu_retain = yes; then
-  $as_echo "#define HAVE_GNU_RETAIN 1" >>confdefs.h
-
+LD=$ac_cv_prog_LD
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
-config_vars="$config_vars
-have-gnu-retain = $libc_cv_gnu_retain"
 
-# Check if gcc warns about alias for function with incompatible types.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler warns about alias for function with incompatible types" >&5
-$as_echo_n "checking if compiler warns about alias for function with incompatible types... " >&6; }
-if ${libc_cv_gcc_incompatible_alias+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.c <<EOF
-int __redirect_foo (const void *s, int c);
 
-__typeof (__redirect_foo) *foo_impl (void) __asm__ ("foo");
-__typeof (__redirect_foo) *foo_impl (void)
-{
-  return 0;
-}
+  test -n "$LD" && break
+done
 
-extern __typeof (__redirect_foo) foo_alias __attribute__ ((alias ("foo")));
-EOF
-libc_cv_gcc_incompatible_alias=yes
-if ${CC-cc} -Werror -c conftest.c -o conftest.o 1>&5 2>&5 ; then
-  libc_cv_gcc_incompatible_alias=no
+if test -z "$LD"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
+$as_echo_n "checking version of $LD... " >&6; }
+  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*GNU gold.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
 fi
-rm -f conftest*
+if test $ac_verc_fail = yes; then
+  LD=: critic_missing="$critic_missing GNU gold"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_incompatible_alias" >&5
-$as_echo "$libc_cv_gcc_incompatible_alias" >&6; }
 
-if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
-  if test x"$multi_arch" = xyes; then
-    as_fn_error $? "--enable-multi-arch support requires assembler and linker support" "$LINENO" 5
-  else
-    multi_arch=no
-  fi
-fi
-if test x"$libc_cv_gcc_indirect_function" != xyes; then
-  # GCC 8+ emits a warning for alias with incompatible types and it might
-  # fail to build ifunc resolvers aliases to either weak or internal
-  # symbols.  Disables multiarch build in this case.
-  if test x"$libc_cv_gcc_incompatible_alias" = xyes; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: gcc emits a warning for alias between functions of incompatible types" >&5
-$as_echo "$as_me: WARNING: gcc emits a warning for alias between functions of incompatible types" >&2;}
-    if test x"$multi_arch" = xyes; then
-      as_fn_error $? "--enable-multi-arch support requires a gcc with gnu-indirect-function support" "$LINENO" 5
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Multi-arch is disabled." >&5
-$as_echo "$as_me: WARNING: Multi-arch is disabled." >&2;}
-    multi_arch=no
-  elif test x"$multi_arch" = xyes; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-multi-arch support recommends a gcc with gnu-indirect-function support.
-Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function" >&5
-$as_echo "$as_me: WARNING: --enable-multi-arch support recommends a gcc with gnu-indirect-function support.
-Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function" >&2;}
+    ;;
+  "LLD"*)
+  # Accept LLD 13.0.0 or higher
+    for ac_prog in $LD
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LD"; then
+  ac_cv_prog_LD="$LD" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_LD="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
   fi
+done
+  done
+IFS=$as_save_IFS
+
 fi
-multi_arch_d=
-if test x"$multi_arch" != xno; then
-  multi_arch_d=/multiarch
+fi
+LD=$ac_cv_prog_LD
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
 
-# Compute the list of sysdep directories for this configuration.
-# This can take a while to compute.
-sysdep_dir=$srcdir/sysdeps
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking sysdep dirs" >&5
-$as_echo_n "checking sysdep dirs... " >&6; }
-# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
-os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
-
-test "x$base_os" != x || case "$os" in
-gnu*)
-  base_os=mach/hurd ;;
-linux*)
-  base_os=unix/sysv ;;
-esac
 
-# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
-tail=$os
-ostry=$os
-while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
-  ostry="$ostry /$o"
-  tail=$o
+  test -n "$LD" && break
 done
-o=`echo $tail | sed 's/[0-9]*$//'`
-if test $o != $tail; then
-  ostry="$ostry /$o"
+
+if test -z "$LD"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
+$as_echo_n "checking version of $LD... " >&6; }
+  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*LLD.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    1[3-9].*|[2-9][0-9].*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
 fi
-# For linux-gnu, try linux-gnu, then linux.
-o=`echo $tail | sed 's/-.*$//'`
-if test $o != $tail; then
-  ostry="$ostry /$o"
+if test $ac_verc_fail = yes; then
+  LD=: critic_missing="$critic_missing LLD"
 fi
 
-# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
-base=
-tail=$base_os
-while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
-  set $b
-  base="$base /$1"
-  tail="$2"
-done
-
-# For sparc/sparc32, try sparc/sparc32 and then sparc.
-mach=
-tail=$machine${submachine:+/$submachine}
-while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
-  set $m
-  # Prepend the machine's FPU directory unless the architecture specific
-  # preconfigure disables it.
-  if test "$libc_cv_with_fp" = yes; then
-    maybe_fpu=/fpu
-  else
-    maybe_fpu=/nofpu
+    libc_cv_with_lld=yes
+    ;;
+  *)
+    for ac_prog in $LD
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LD"; then
+  ac_cv_prog_LD="$LD" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_LD="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
   fi
-  # For each machine term, try it with and then without /multiarch.
-  for try_fpu in $maybe_fpu ''; do
-    for try_multi in $multi_arch_d ''; do
-      mach="$mach /$1$try_fpu$try_multi"
-    done
-  done
-  tail="$2"
 done
-
-
-# Find what sysdep directories exist.
-sysnames=
-for b in $base ''; do
-  for m0 in $mach ''; do
-    for v in /$vendor ''; do
-      test "$v" = / && continue
-      for o in /$ostry ''; do
-	test "$o" = / && continue
-	for m in $mach ''; do
-	  try_suffix="$m0$b$v$o$m"
-	  if test -n "$try_suffix"; then
-	    try_srcdir="${srcdir}/"
-	    try="sysdeps$try_suffix"
-	    test -n "$enable_debug_configure" &&
-	    echo "$0 DEBUG: try $try" >&2
-	    if test -d "$try_srcdir$try"; then
-	      sysnames="$sysnames $try"
-	      { test -n "$o" || test -n "$b"; } && os_used=t
-	      { test -n "$m" || test -n "$m0"; } && machine_used=t
-	      case x${m0:-$m} in
-	      x*/$submachine) submachine_used=t ;;
-	      esac
-	    fi
-	  fi
-	done
-      done
-    done
   done
-done
-
-# If the assembler supports gnu_indirect_function symbol type and the
-# architecture supports multi-arch, we enable multi-arch by default.
-case $sysnames in
-*"$multi_arch_d"*)
-  ;;
-*)
-  test x"$multi_arch" = xdefault && multi_arch=no
-  ;;
-esac
-if test x"$multi_arch" != xno; then
-  $as_echo "#define USE_MULTIARCH 1" >>confdefs.h
-
-fi
-
+IFS=$as_save_IFS
 
-if test -z "$os_used" && test "$os" != none; then
-  as_fn_error $? "Operating system $os is not supported." "$LINENO" 5
 fi
-if test -z "$machine_used" && test "$machine" != none; then
-  as_fn_error $? "The $machine is not supported." "$LINENO" 5
 fi
-if test -z "$submachine_used" && test -n "$submachine"; then
-  as_fn_error $? "The $submachine subspecies of $host_cpu is not supported." "$LINENO" 5
+LD=$ac_cv_prog_LD
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
 
 
-# We have now validated the configuration.
+  test -n "$LD" && break
+done
 
-# Expand the list of system names into a full list of directories
-# from each element's parent name and Implies file (if present).
-set $sysnames
-names=
-while test $# -gt 0; do
-  name=$1
-  shift
+if test -z "$LD"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
+$as_echo_n "checking version of $LD... " >&6; }
+  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*GNU ld.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
-  case " $names " in *" $name "*)
-    # Already in the list.
-    continue
   esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
+fi
+if test $ac_verc_fail = yes; then
+  LD=: critic_missing="$critic_missing GNU ld"
+fi
 
-  # Report each name as we discover it, so there is no long pause in output.
-  echo $ECHO_N "$name $ECHO_C" >&6
-
-  name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
-
-  case $name in
-    /*) xsrcdir= ;;
-    *)  xsrcdir=$srcdir/ ;;
-  esac
-  test -n "$enable_debug_configure" &&
-  echo "DEBUG: name/Implies $xsrcdir$name/Implies" >&2
+    ;;
+esac
+config_vars="$config_vars
+with-lld = $libc_cv_with_lld"
 
-  for implies_file in Implies Implies-before Implies-after; do
-    implies_type=`echo $implies_file | sed s/-/_/`
-    eval ${implies_type}=
-    if test -f $xsrcdir$name/$implies_file; then
-      # Collect more names from the `Implies' file (removing comments).
-      implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
-      for x in $implied_candidate; do
-	found=no
-	if test -d $xsrcdir$name_base/$x; then
-	  eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
-	  found=yes
-	fi
-	try="sysdeps/$x"
-	try_srcdir=$srcdir/
-	test -n "$enable_debug_configure" &&
-	 echo "DEBUG: $name $implies_file $x try() {$try_srcdir}$try" >&2
-	if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
-	then
-	  eval "${implies_type}=\"\$${implies_type} \$try\""
-	  found=yes
-	fi
-	if test $found = no; then
-	  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $name/$implies_file specifies nonexistent $x" >&5
-$as_echo "$as_me: WARNING: $name/$implies_file specifies nonexistent $x" >&2;}
-	fi
-      done
-    fi
+# These programs are version sensitive.
+for ac_prog in gnumake gmake make
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_MAKE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$MAKE"; then
+  ac_cv_prog_MAKE="$MAKE" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_MAKE="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
   done
+IFS=$as_save_IFS
 
-  # Add NAME to the list of names.
-  names="$names $name"
-
-  # Find the parent of NAME, using the empty string if it has none.
-  parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
+fi
+fi
+MAKE=$ac_cv_prog_MAKE
+if test -n "$MAKE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAKE" >&5
+$as_echo "$MAKE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
 
-  test -n "$enable_debug_configure" &&
-    echo "DEBUG: $name Implies='$Implies' rest='$*' parent='$parent' \
-Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
 
-  # Add the names implied by NAME, and NAME's parent (if it has one), to
-  # the list of names to be processed (the argument list).  We prepend the
-  # implied names to the list and append the parent.  We want implied
-  # directories to come before further directories inferred from the
-  # configuration components; this ensures that for sysv4, unix/common
-  # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
-  # after sysv4).
-  sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
-  test -n "$sysnames" && set $sysnames
+  test -n "$MAKE" && break
 done
 
-# Add the default directories.
-default_sysnames="sysdeps/generic"
-sysnames="$names $default_sysnames"
-
-# The other names were emitted during the scan.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $default_sysnames" >&5
-$as_echo "$default_sysnames" >&6; }
+if test -z "$MAKE"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MAKE" >&5
+$as_echo_n "checking version of $MAKE... " >&6; }
+  ac_prog_version=`$MAKE --version 2>&1 | sed -n 's/^.*GNU Make[^0-9]*\([0-9][0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    [4-9].* | [1-9][0-9]*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
+fi
+if test $ac_verc_fail = yes; then
+  critic_missing="$critic_missing make"
+fi
 
-### Locate tools.
 
-# Find a good install program.  We prefer a C program (faster),
-# so one script is as good as another.  But avoid the broken or
-# incompatible versions:
-# SysV /etc/install, /usr/sbin/install
-# SunOS /usr/etc/install
-# IRIX /sbin/install
-# AIX /bin/install
-# AmigaOS /C/install, which installs bootblocks on floppy discs
-# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
-# AFS /usr/afsws/bin/install, which mishandles nonexistent args
-# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
-# OS/2's system install, which has a completely different semantic
-# ./install, which can be erroneously created by make from ./install.sh.
-# Reject install programs that cannot install multiple files.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
-$as_echo_n "checking for a BSD-compatible install... " >&6; }
-if test -z "$INSTALL"; then
-if ${ac_cv_path_install+:} false; then :
+for ac_prog in gnumsgfmt gmsgfmt msgfmt
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_MSGFMT+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+  if test -n "$MSGFMT"; then
+  ac_cv_prog_MSGFMT="$MSGFMT" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
-    # Account for people who put trailing slashes in PATH elements.
-case $as_dir/ in #((
-  ./ | .// | /[cC]/* | \
-  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
-  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
-  /usr/ucb/* ) ;;
-  *)
-    # OSF1 and SCO ODT 3.0 have their own names for install.
-    # Don't use installbsd from OSF since it installs stuff as root
-    # by default.
-    for ac_prog in ginstall scoinst install; do
-      for ac_exec_ext in '' $ac_executable_extensions; do
-	if as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
-	  if test $ac_prog = install &&
-	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
-	    # AIX install.  It has an incompatible calling convention.
-	    :
-	  elif test $ac_prog = install &&
-	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
-	    # program-specific install script used by HP pwplus--don't use.
-	    :
-	  else
-	    rm -rf conftest.one conftest.two conftest.dir
-	    echo one > conftest.one
-	    echo two > conftest.two
-	    mkdir conftest.dir
-	    if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
-	      test -s conftest.one && test -s conftest.two &&
-	      test -s conftest.dir/conftest.one &&
-	      test -s conftest.dir/conftest.two
-	    then
-	      ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
-	      break 3
-	    fi
-	  fi
-	fi
-      done
-    done
-    ;;
-esac
-
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_MSGFMT="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
   done
 IFS=$as_save_IFS
 
-rm -rf conftest.one conftest.two conftest.dir
-
-fi
-  if test "${ac_cv_path_install+set}" = set; then
-    INSTALL=$ac_cv_path_install
-  else
-    # As a last resort, use the slow shell script.  Don't cache a
-    # value for INSTALL within a source directory, because that will
-    # break other packages using the cache if that directory is
-    # removed, or if the value is a relative name.
-    INSTALL=$ac_install_sh
-  fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
-$as_echo "$INSTALL" >&6; }
-
-# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
-# It thinks the first close brace ends the variable substitution.
-test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
-
-test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
-
-test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
-
-if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
-  # The makefiles need to use a different form to find it in $srcdir.
-  INSTALL='\$(..)./scripts/install-sh -c'
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
-$as_echo_n "checking whether ln -s works... " >&6; }
-LN_S=$as_ln_s
-if test "$LN_S" = "ln -s"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+MSGFMT=$ac_cv_prog_MSGFMT
+if test -n "$MSGFMT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSGFMT" >&5
+$as_echo "$MSGFMT" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
-$as_echo "no, using $LN_S" >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
 
 
-# Was a --with-binutils option given?
-if test -n "$path_binutils"; then
-    # Make absolute; ensure a single trailing slash.
-    path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
-    CC="$CC -B$path_binutils"
-fi
-case "$CC" in
-    *fuse-ld=lld*) LDNAME=ld.lld;;
-    *)             LDNAME=ld;;
-esac
-AS=`$CC -print-prog-name=as`
-LD=`$CC -print-prog-name=$LDNAME`
-AR=`$CC -print-prog-name=ar`
-
-OBJCOPY=`$CC -print-prog-name=objcopy`
+  test -n "$MSGFMT" && break
+done
 
-GPROF=`$CC -print-prog-name=gprof`
+if test -z "$MSGFMT"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MSGFMT" >&5
+$as_echo_n "checking version of $MSGFMT... " >&6; }
+  ac_prog_version=`$MSGFMT --version 2>&1 | sed -n 's/^.*GNU gettext.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
+fi
+if test $ac_verc_fail = yes; then
+  MSGFMT=: aux_missing="$aux_missing msgfmt"
+fi
 
-# Determine whether we are using GNU binutils.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $AS is GNU as" >&5
-$as_echo_n "checking whether $AS is GNU as... " >&6; }
-if ${libc_cv_prog_as_gnu+:} false; then :
+for ac_prog in makeinfo
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_MAKEINFO+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  # Most GNU programs take a -v and spit out some text including
-# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
-if $AS -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
-  libc_cv_prog_as_gnu=yes
+  if test -n "$MAKEINFO"; then
+  ac_cv_prog_MAKEINFO="$MAKEINFO" # Let the user override the test.
 else
-  libc_cv_prog_as_gnu=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_MAKEINFO="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
 fi
-rm -fr contest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_prog_as_gnu" >&5
-$as_echo "$libc_cv_prog_as_gnu" >&6; }
-rm -f a.out
-gnu_as=$libc_cv_prog_as_gnu
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $LD is GNU ld" >&5
-$as_echo_n "checking whether $LD is GNU ld... " >&6; }
-if ${libc_cv_prog_ld_gnu+:} false; then :
-  $as_echo_n "(cached) " >&6
+MAKEINFO=$ac_cv_prog_MAKEINFO
+if test -n "$MAKEINFO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAKEINFO" >&5
+$as_echo "$MAKEINFO" >&6; }
 else
-  # Most GNU programs take a -v and spit out some text including
-# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
-if $LD -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
-  libc_cv_prog_ld_gnu=yes
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MAKEINFO" && break
+done
+
+if test -z "$MAKEINFO"; then
+  ac_verc_fail=yes
 else
-  libc_cv_prog_ld_gnu=no
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MAKEINFO" >&5
+$as_echo_n "checking version of $MAKEINFO... " >&6; }
+  ac_prog_version=`$MAKEINFO --version 2>&1 | sed -n 's/^.*GNU texinfo.* \([0-9][0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    4.[7-9]*|4.[1-9][0-9]*|[5-9].*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
 fi
-rm -fr contest*
+if test $ac_verc_fail = yes; then
+  MAKEINFO=: aux_missing="$aux_missing makeinfo"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_prog_ld_gnu" >&5
-$as_echo "$libc_cv_prog_ld_gnu" >&6; }
-gnu_ld=$libc_cv_prog_ld_gnu
-
 
-# Accept binutils 2.25 or newer.
-for ac_prog in $AS
+for ac_prog in sed
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AS+:} false; then :
+if ${ac_cv_prog_SED+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$AS"; then
-  ac_cv_prog_AS="$AS" # Let the user override the test.
+  if test -n "$SED"; then
+  ac_cv_prog_SED="$SED" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -4736,7 +4673,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AS="$ac_prog"
+    ac_cv_prog_SED="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4746,29 +4683,29 @@  IFS=$as_save_IFS
 
 fi
 fi
-AS=$ac_cv_prog_AS
-if test -n "$AS"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
-$as_echo "$AS" >&6; }
+SED=$ac_cv_prog_SED
+if test -n "$SED"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SED" >&5
+$as_echo "$SED" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$AS" && break
+  test -n "$SED" && break
 done
 
-if test -z "$AS"; then
+if test -z "$SED"; then
   ac_verc_fail=yes
 else
   # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AS" >&5
-$as_echo_n "checking version of $AS... " >&6; }
-  ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $SED" >&5
+$as_echo_n "checking version of $SED... " >&6; }
+  ac_prog_version=`$SED --version 2>&1 | sed -n 's/^.*GNU sed[^0-9]* \([0-9]*\.[0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
+    3.0[2-9]*|3.[1-9]*|[4-9]*)
        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
@@ -4777,25 +4714,20 @@  $as_echo_n "checking version of $AS... " >&6; }
 $as_echo "$ac_prog_version" >&6; }
 fi
 if test $ac_verc_fail = yes; then
-  AS=: critic_missing="$critic_missing as"
+  SED=: aux_missing="$aux_missing sed"
 fi
 
-
-libc_cv_with_lld=no
-case $($LD --version) in
-  "GNU gold"*)
-  # Accept gold 1.14 or higher
-    for ac_prog in $LD
+for ac_prog in gawk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LD+:} false; then :
+if ${ac_cv_prog_AWK+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$LD"; then
-  ac_cv_prog_LD="$LD" # Let the user override the test.
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -4804,7 +4736,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_LD="$ac_prog"
+    ac_cv_prog_AWK="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4814,29 +4746,29 @@  IFS=$as_save_IFS
 
 fi
 fi
-LD=$ac_cv_prog_LD
-if test -n "$LD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-$as_echo "$LD" >&6; }
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$LD" && break
+  test -n "$AWK" && break
 done
 
-if test -z "$LD"; then
+if test -z "$AWK"; then
   ac_verc_fail=yes
 else
   # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
-$as_echo_n "checking version of $LD... " >&6; }
-  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*GNU gold.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AWK" >&5
+$as_echo_n "checking version of $AWK... " >&6; }
+  ac_prog_version=`$AWK --version 2>&1 | sed -n 's/^.*GNU Awk[^0-9]*\([0-9][0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*)
+    3.1.[2-9]*|3.[2-9]*|[4-9]*)
        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
@@ -4845,23 +4777,20 @@  $as_echo_n "checking version of $LD... " >&6; }
 $as_echo "$ac_prog_version" >&6; }
 fi
 if test $ac_verc_fail = yes; then
-  LD=: critic_missing="$critic_missing GNU gold"
+  critic_missing="$critic_missing gawk"
 fi
 
-    ;;
-  "LLD"*)
-  # Accept LLD 13.0.0 or higher
-    for ac_prog in $LD
+for ac_prog in bison
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LD+:} false; then :
+if ${ac_cv_prog_BISON+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$LD"; then
-  ac_cv_prog_LD="$LD" # Let the user override the test.
+  if test -n "$BISON"; then
+  ac_cv_prog_BISON="$BISON" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -4870,7 +4799,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_LD="$ac_prog"
+    ac_cv_prog_BISON="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4880,29 +4809,29 @@  IFS=$as_save_IFS
 
 fi
 fi
-LD=$ac_cv_prog_LD
-if test -n "$LD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-$as_echo "$LD" >&6; }
+BISON=$ac_cv_prog_BISON
+if test -n "$BISON"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BISON" >&5
+$as_echo "$BISON" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$LD" && break
+  test -n "$BISON" && break
 done
 
-if test -z "$LD"; then
+if test -z "$BISON"; then
   ac_verc_fail=yes
 else
   # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
-$as_echo_n "checking version of $LD... " >&6; }
-  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*LLD.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $BISON" >&5
+$as_echo_n "checking version of $BISON... " >&6; }
+  ac_prog_version=`$BISON --version 2>&1 | sed -n 's/^.*bison (GNU Bison) \([0-9]*\.[0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    1[3-9].*|[2-9][0-9].*)
+    2.7*|[3-9].*|[1-9][0-9]*)
        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
@@ -4911,23 +4840,53 @@  $as_echo_n "checking version of $LD... " >&6; }
 $as_echo "$ac_prog_version" >&6; }
 fi
 if test $ac_verc_fail = yes; then
-  LD=: critic_missing="$critic_missing LLD"
+  critic_missing="$critic_missing bison"
 fi
 
-    libc_cv_with_lld=yes
-    ;;
-  *)
-    for ac_prog in $LD
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC is sufficient to build libc" >&5
+$as_echo_n "checking if $CC is sufficient to build libc... " >&6; }
+if ${libc_cv_compiler_ok+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+#if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2)
+#error insufficient compiler
+#endif
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  libc_cv_compiler_ok=yes
+else
+  libc_cv_compiler_ok=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_compiler_ok" >&5
+$as_echo "$libc_cv_compiler_ok" >&6; }
+if test $libc_cv_compiler_ok != yes; then :
+  critic_missing="$critic_missing compiler"
+fi
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}nm", so it can be a program name with args.
+set dummy ${ac_tool_prefix}nm; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LD+:} false; then :
+if ${ac_cv_prog_NM+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$LD"; then
-  ac_cv_prog_LD="$LD" # Let the user override the test.
+  if test -n "$NM"; then
+  ac_cv_prog_NM="$NM" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -4936,7 +4895,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_LD="$ac_prog"
+    ac_cv_prog_NM="${ac_tool_prefix}nm"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4945,58 +4904,29 @@  done
 IFS=$as_save_IFS
 
 fi
-fi
-LD=$ac_cv_prog_LD
-if test -n "$LD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-$as_echo "$LD" >&6; }
+fi
+NM=$ac_cv_prog_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$LD" && break
-done
-
-if test -z "$LD"; then
-  ac_verc_fail=yes
-else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
-$as_echo_n "checking version of $LD... " >&6; }
-  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*GNU ld.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
 fi
-if test $ac_verc_fail = yes; then
-  LD=: critic_missing="$critic_missing GNU ld"
-fi
-
-    ;;
-esac
-config_vars="$config_vars
-with-lld = $libc_cv_with_lld"
-
-# These programs are version sensitive.
-for ac_prog in gnumake gmake make
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+if test -z "$ac_cv_prog_NM"; then
+  ac_ct_NM=$NM
+  # Extract the first word of "nm", so it can be a program name with args.
+set dummy nm; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_MAKE+:} false; then :
+if ${ac_cv_prog_ac_ct_NM+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$MAKE"; then
-  ac_cv_prog_MAKE="$MAKE" # Let the user override the test.
+  if test -n "$ac_ct_NM"; then
+  ac_cv_prog_ac_ct_NM="$ac_ct_NM" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -5005,7 +4935,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_MAKE="$ac_prog"
+    ac_cv_prog_ac_ct_NM="nm"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -5015,52 +4945,43 @@  IFS=$as_save_IFS
 
 fi
 fi
-MAKE=$ac_cv_prog_MAKE
-if test -n "$MAKE"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAKE" >&5
-$as_echo "$MAKE" >&6; }
+ac_ct_NM=$ac_cv_prog_ac_ct_NM
+if test -n "$ac_ct_NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NM" >&5
+$as_echo "$ac_ct_NM" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
-
-  test -n "$MAKE" && break
-done
-
-if test -z "$MAKE"; then
-  ac_verc_fail=yes
+  if test "x$ac_ct_NM" = x; then
+    NM="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    NM=$ac_ct_NM
+  fi
 else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MAKE" >&5
-$as_echo_n "checking version of $MAKE... " >&6; }
-  ac_prog_version=`$MAKE --version 2>&1 | sed -n 's/^.*GNU Make[^0-9]*\([0-9][0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    [4-9].* | [1-9][0-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
-fi
-if test $ac_verc_fail = yes; then
-  critic_missing="$critic_missing make"
+  NM="$ac_cv_prog_NM"
 fi
 
 
-for ac_prog in gnumsgfmt gmsgfmt msgfmt
+if test "x$maintainer" = "xyes"; then
+  for ac_prog in autoconf
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_MSGFMT+:} false; then :
+if ${ac_cv_prog_AUTOCONF+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$MSGFMT"; then
-  ac_cv_prog_MSGFMT="$MSGFMT" # Let the user override the test.
+  if test -n "$AUTOCONF"; then
+  ac_cv_prog_AUTOCONF="$AUTOCONF" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -5069,7 +4990,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_MSGFMT="$ac_prog"
+    ac_cv_prog_AUTOCONF="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -5079,51 +5000,58 @@  IFS=$as_save_IFS
 
 fi
 fi
-MSGFMT=$ac_cv_prog_MSGFMT
-if test -n "$MSGFMT"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSGFMT" >&5
-$as_echo "$MSGFMT" >&6; }
+AUTOCONF=$ac_cv_prog_AUTOCONF
+if test -n "$AUTOCONF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AUTOCONF" >&5
+$as_echo "$AUTOCONF" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$MSGFMT" && break
+  test -n "$AUTOCONF" && break
 done
+test -n "$AUTOCONF" || AUTOCONF="no"
 
-if test -z "$MSGFMT"; then
-  ac_verc_fail=yes
+  case "x$AUTOCONF" in
+  xno|x|x:) AUTOCONF=no ;;
+  *)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking   whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works" >&5
+$as_echo_n "checking   whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works... " >&6; }
+if ${libc_cv_autoconf_works+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MSGFMT" >&5
-$as_echo_n "checking version of $MSGFMT... " >&6; }
-  ac_prog_version=`$MSGFMT --version 2>&1 | sed -n 's/^.*GNU gettext.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
+      if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then
+      libc_cv_autoconf_works=yes
+    else
+      libc_cv_autoconf_works=no
+    fi
 fi
-if test $ac_verc_fail = yes; then
-  MSGFMT=: aux_missing="$aux_missing msgfmt"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_autoconf_works" >&5
+$as_echo "$libc_cv_autoconf_works" >&6; }
+    test $libc_cv_autoconf_works = yes || AUTOCONF=no
+    ;;
+  esac
+  if test "x$AUTOCONF" = xno; then
+    aux_missing="$aux_missing autoconf"
+  fi
+else
+  AUTOCONF=no
 fi
 
-for ac_prog in makeinfo
+# Check for python3 if available, or else python.
+for ac_prog in python3 python
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_MAKEINFO+:} false; then :
+if ${ac_cv_prog_PYTHON_PROG+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$MAKEINFO"; then
-  ac_cv_prog_MAKEINFO="$MAKEINFO" # Let the user override the test.
+  if test -n "$PYTHON_PROG"; then
+  ac_cv_prog_PYTHON_PROG="$PYTHON_PROG" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -5132,7 +5060,7 @@  do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_MAKEINFO="$ac_prog"
+    ac_cv_prog_PYTHON_PROG="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -5142,29 +5070,29 @@  IFS=$as_save_IFS
 
 fi
 fi
-MAKEINFO=$ac_cv_prog_MAKEINFO
-if test -n "$MAKEINFO"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAKEINFO" >&5
-$as_echo "$MAKEINFO" >&6; }
+PYTHON_PROG=$ac_cv_prog_PYTHON_PROG
+if test -n "$PYTHON_PROG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON_PROG" >&5
+$as_echo "$PYTHON_PROG" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
 
 
-  test -n "$MAKEINFO" && break
+  test -n "$PYTHON_PROG" && break
 done
 
-if test -z "$MAKEINFO"; then
+if test -z "$PYTHON_PROG"; then
   ac_verc_fail=yes
 else
   # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $MAKEINFO" >&5
-$as_echo_n "checking version of $MAKEINFO... " >&6; }
-  ac_prog_version=`$MAKEINFO --version 2>&1 | sed -n 's/^.*GNU texinfo.* \([0-9][0-9.]*\).*$/\1/p'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $PYTHON_PROG" >&5
+$as_echo_n "checking version of $PYTHON_PROG... " >&6; }
+  ac_prog_version=`$PYTHON_PROG --version 2>&1 | sed -n 's/^.*Python \([0-9][0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    4.[7-9]*|4.[1-9][0-9]*|[5-9].*)
+    3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*)
        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 
@@ -5173,474 +5101,546 @@  $as_echo_n "checking version of $MAKEINFO... " >&6; }
 $as_echo "$ac_prog_version" >&6; }
 fi
 if test $ac_verc_fail = yes; then
-  MAKEINFO=: aux_missing="$aux_missing makeinfo"
+  critic_missing="$critic_missing python"
 fi
 
-for ac_prog in sed
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_SED+:} false; then :
+PYTHON="$PYTHON_PROG -B"
+
+
+test -n "$critic_missing" && as_fn_error $? "
+*** These critical programs are missing or too old:$critic_missing
+*** Check the INSTALL file for required versions." "$LINENO" 5
+
+test -n "$aux_missing" && { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
+*** These auxiliary programs are missing or incompatible versions:$aux_missing
+*** some features or tests will be disabled.
+*** Check the INSTALL file for required versions." >&5
+$as_echo "$as_me: WARNING:
+*** These auxiliary programs are missing or incompatible versions:$aux_missing
+*** some features or tests will be disabled.
+*** Check the INSTALL file for required versions." >&2;}
+
+
+# Determine whether to use fpu or nofpu sysdeps directories.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for use of fpu sysdeps directories" >&5
+$as_echo_n "checking for use of fpu sysdeps directories... " >&6; }
+if ${libc_cv_with_fp+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$SED"; then
-  ac_cv_prog_SED="$SED" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_SED="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
+  cat > conftest.c <<EOF
+#if $with_fp_cond
+int dummy;
+#else
+# error "no hardware floating point"
+#endif
+EOF
+libc_cv_with_fp=no
+if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \
+   1>&5 2>&5 ; then
+  libc_cv_with_fp=yes
 fi
+rm -f conftest*
 fi
-SED=$ac_cv_prog_SED
-if test -n "$SED"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SED" >&5
-$as_echo "$SED" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_with_fp" >&5
+$as_echo "$libc_cv_with_fp" >&6; }
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector" >&5
+$as_echo_n "checking for -fstack-protector... " >&6; }
+if ${libc_cv_ssp+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector -xc /dev/null -S -o /dev/null'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  libc_cv_ssp=yes
+else
+  libc_cv_ssp=no
 fi
 
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp" >&5
+$as_echo "$libc_cv_ssp" >&6; }
 
-  test -n "$SED" && break
-done
-
-if test -z "$SED"; then
-  ac_verc_fail=yes
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector-strong" >&5
+$as_echo_n "checking for -fstack-protector-strong... " >&6; }
+if ${libc_cv_ssp_strong+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $SED" >&5
-$as_echo_n "checking version of $SED... " >&6; }
-  ac_prog_version=`$SED --version 2>&1 | sed -n 's/^.*GNU sed[^0-9]* \([0-9]*\.[0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    3.0[2-9]*|3.[1-9]*|[4-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
+  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector-strong -xc /dev/null -S -o /dev/null'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  libc_cv_ssp_strong=yes
+else
+  libc_cv_ssp_strong=no
 fi
-if test $ac_verc_fail = yes; then
-  SED=: aux_missing="$aux_missing sed"
+
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp_strong" >&5
+$as_echo "$libc_cv_ssp_strong" >&6; }
 
-for ac_prog in gawk
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AWK+:} false; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector-all" >&5
+$as_echo_n "checking for -fstack-protector-all... " >&6; }
+if ${libc_cv_ssp_all+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$AWK"; then
-  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -fstack-protector-all -xc /dev/null -S -o /dev/null'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  libc_cv_ssp_all=yes
 else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AWK="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
+  libc_cv_ssp_all=no
+fi
 
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ssp_all" >&5
+$as_echo "$libc_cv_ssp_all" >&6; }
+
+stack_protector=
+no_stack_protector=
+if test "$libc_cv_ssp" = yes; then
+  no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0"
+  $as_echo "#define HAVE_CC_NO_STACK_PROTECTOR 1" >>confdefs.h
+
 fi
-AWK=$ac_cv_prog_AWK
-if test -n "$AWK"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
-$as_echo "$AWK" >&6; }
+
+if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then
+  stack_protector="-fstack-protector"
+  $as_echo "#define STACK_PROTECTOR_LEVEL 1" >>confdefs.h
+
+elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then
+  stack_protector="-fstack-protector-all"
+  $as_echo "#define STACK_PROTECTOR_LEVEL 2" >>confdefs.h
+
+elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then
+  stack_protector="-fstack-protector-strong"
+  $as_echo "#define STACK_PROTECTOR_LEVEL 3" >>confdefs.h
+
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  stack_protector="-fno-stack-protector"
+  $as_echo "#define STACK_PROTECTOR_LEVEL 0" >>confdefs.h
+
 fi
 
 
-  test -n "$AWK" && break
-done
 
-if test -z "$AWK"; then
-  ac_verc_fail=yes
+
+if test -n "$stack_protector"; then
+      no_ssp=-fno-stack-protector
 else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AWK" >&5
-$as_echo_n "checking version of $AWK... " >&6; }
-  ac_prog_version=`$AWK --version 2>&1 | sed -n 's/^.*GNU Awk[^0-9]*\([0-9][0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    3.1.[2-9]*|3.[2-9]*|[4-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+  no_ssp=
 
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
-fi
-if test $ac_verc_fail = yes; then
-  critic_missing="$critic_missing gawk"
+  if test "$enable_stack_protector" != no; then
+    as_fn_error $? "--enable-stack-protector=$enable_stack_protector specified, but specified level of stack protection is not supported by the compiler." "$LINENO" 5
+  fi
 fi
 
-for ac_prog in bison
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_BISON+:} false; then :
+# For the multi-arch option we need support in the assembler & linker.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler and linker STT_GNU_IFUNC support" >&5
+$as_echo_n "checking for assembler and linker STT_GNU_IFUNC support... " >&6; }
+if ${libc_cv_ld_gnu_indirect_function+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$BISON"; then
-  ac_cv_prog_BISON="$BISON" # Let the user override the test.
+  cat > conftest.S <<EOF
+.type foo,%gnu_indirect_function
+foo:
+.globl _start
+_start:
+.globl __start
+__start:
+.data
+#ifdef _LP64
+.quad foo
+#else
+.long foo
+#endif
+EOF
+libc_cv_ld_gnu_indirect_function=no
+if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
+	    -nostartfiles -nostdlib $no_ssp \
+	    -o conftest conftest.S 1>&5 2>&5; then
+  # Do a link to see if the backend supports IFUNC relocs.
+  $READELF -r conftest 1>&5
+  LC_ALL=C $READELF -Wr conftest | grep -q 'IRELATIVE\|R_SPARC_JMP_IREL' && {
+    libc_cv_ld_gnu_indirect_function=yes
+  }
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ld_gnu_indirect_function" >&5
+$as_echo "$libc_cv_ld_gnu_indirect_function" >&6; }
+
+# Check if gcc supports attribute ifunc as it is used in libc_ifunc macro.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc attribute ifunc support" >&5
+$as_echo_n "checking for gcc attribute ifunc support... " >&6; }
+if ${libc_cv_gcc_indirect_function+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_BISON="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
+  cat > conftest.c <<EOF
+extern int func (int);
+int used_func (int a)
+{
+  return a;
+}
+static void *resolver ()
+{
+  return &used_func;
+}
+extern __typeof (func) func __attribute__ ((ifunc ("resolver")));
+EOF
+libc_cv_gcc_indirect_function=no
+if ${CC-cc} -c conftest.c -o conftest.o 1>&5 \
+   2>&5 ; then
+  if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&5; then
+    libc_cv_gcc_indirect_function=yes
   fi
-done
-  done
-IFS=$as_save_IFS
-
 fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_indirect_function" >&5
+$as_echo "$libc_cv_gcc_indirect_function" >&6; }
+
+# Check if linker supports textrel relocation with ifunc (used on elf/tests).
+# Note that it relies on libc_cv_ld_gnu_indirect_function test above.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the linker supports textrels along with ifunc" >&5
+$as_echo_n "checking whether the linker supports textrels along with ifunc... " >&6; }
+if ${libc_cv_textrel_ifunc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.S <<EOF
+.type foo,%gnu_indirect_function
+foo:
+.globl _start
+_start:
+.globl __start
+__start:
+.data
+#ifdef _LP64
+.quad foo
+#else
+.long foo
+#endif
+.text
+.globl address
+address:
+#ifdef _LP64
+.quad address
+#else
+.long address
+#endif
+EOF
+libc_cv_textrel_ifunc=no
+if test $libc_cv_ld_gnu_indirect_function = yes; then
+   if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp -pie -o conftest conftest.S'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+     libc_cv_textrel_ifunc=yes
+   fi
 fi
-BISON=$ac_cv_prog_BISON
-if test -n "$BISON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BISON" >&5
-$as_echo "$BISON" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+rm -f conftest*
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_textrel_ifunc" >&5
+$as_echo "$libc_cv_textrel_ifunc" >&6; }
 
 
-  test -n "$BISON" && break
-done
-
-if test -z "$BISON"; then
-  ac_verc_fail=yes
+# Check if CC supports attribute retain as it is used in attribute_used_retain macro.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU attribute retain support" >&5
+$as_echo_n "checking for GNU attribute retain support... " >&6; }
+if ${libc_cv_gnu_retain+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $BISON" >&5
-$as_echo_n "checking version of $BISON... " >&6; }
-  ac_prog_version=`$BISON --version 2>&1 | sed -n 's/^.*bison (GNU Bison) \([0-9]*\.[0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    2.7*|[3-9].*|[1-9][0-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
-
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
+  cat > conftest.c <<EOF
+static int var  __attribute__ ((used, retain, section ("__libc_atexit")));
+EOF
+libc_cv_gnu_retain=no
+if ${CC-cc} -Werror -c conftest.c -o /dev/null 1>&5 \
+   2>&5 ; then
+  libc_cv_gnu_retain=yes
 fi
-if test $ac_verc_fail = yes; then
-  critic_missing="$critic_missing bison"
+rm -f conftest*
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gnu_retain" >&5
+$as_echo "$libc_cv_gnu_retain" >&6; }
+if test $libc_cv_gnu_retain = yes; then
+  $as_echo "#define HAVE_GNU_RETAIN 1" >>confdefs.h
 
+fi
+config_vars="$config_vars
+have-gnu-retain = $libc_cv_gnu_retain"
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC is sufficient to build libc" >&5
-$as_echo_n "checking if $CC is sufficient to build libc... " >&6; }
-if ${libc_cv_compiler_ok+:} false; then :
+# Check if gcc warns about alias for function with incompatible types.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler warns about alias for function with incompatible types" >&5
+$as_echo_n "checking if compiler warns about alias for function with incompatible types... " >&6; }
+if ${libc_cv_gcc_incompatible_alias+:} false; then :
   $as_echo_n "(cached) " >&6
 else
+  cat > conftest.c <<EOF
+int __redirect_foo (const void *s, int c);
 
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
+__typeof (__redirect_foo) *foo_impl (void) __asm__ ("foo");
+__typeof (__redirect_foo) *foo_impl (void)
 {
-
-#if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2)
-#error insufficient compiler
-#endif
-  ;
   return 0;
 }
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  libc_cv_compiler_ok=yes
-else
-  libc_cv_compiler_ok=no
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
+
+extern __typeof (__redirect_foo) foo_alias __attribute__ ((alias ("foo")));
+EOF
+libc_cv_gcc_incompatible_alias=yes
+if ${CC-cc} -Werror -c conftest.c -o conftest.o 1>&5 2>&5 ; then
+  libc_cv_gcc_incompatible_alias=no
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_compiler_ok" >&5
-$as_echo "$libc_cv_compiler_ok" >&6; }
-if test $libc_cv_compiler_ok != yes; then :
-  critic_missing="$critic_missing compiler"
+rm -f conftest*
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_incompatible_alias" >&5
+$as_echo "$libc_cv_gcc_incompatible_alias" >&6; }
 
-if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}nm", so it can be a program name with args.
-set dummy ${ac_tool_prefix}nm; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_NM+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$NM"; then
-  ac_cv_prog_NM="$NM" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_NM="${ac_tool_prefix}nm"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
+if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
+  if test x"$multi_arch" = xyes; then
+    as_fn_error $? "--enable-multi-arch support requires assembler and linker support" "$LINENO" 5
+  else
+    multi_arch=no
   fi
-done
-  done
-IFS=$as_save_IFS
-
 fi
+if test x"$libc_cv_gcc_indirect_function" != xyes; then
+  # GCC 8+ emits a warning for alias with incompatible types and it might
+  # fail to build ifunc resolvers aliases to either weak or internal
+  # symbols.  Disables multiarch build in this case.
+  if test x"$libc_cv_gcc_incompatible_alias" = xyes; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: gcc emits a warning for alias between functions of incompatible types" >&5
+$as_echo "$as_me: WARNING: gcc emits a warning for alias between functions of incompatible types" >&2;}
+    if test x"$multi_arch" = xyes; then
+      as_fn_error $? "--enable-multi-arch support requires a gcc with gnu-indirect-function support" "$LINENO" 5
+    fi
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Multi-arch is disabled." >&5
+$as_echo "$as_me: WARNING: Multi-arch is disabled." >&2;}
+    multi_arch=no
+  elif test x"$multi_arch" = xyes; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-multi-arch support recommends a gcc with gnu-indirect-function support.
+Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function" >&5
+$as_echo "$as_me: WARNING: --enable-multi-arch support recommends a gcc with gnu-indirect-function support.
+Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function" >&2;}
+  fi
 fi
-NM=$ac_cv_prog_NM
-if test -n "$NM"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
-$as_echo "$NM" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+multi_arch_d=
+if test x"$multi_arch" != xno; then
+  multi_arch_d=/multiarch
 fi
 
+# Compute the list of sysdep directories for this configuration.
+# This can take a while to compute.
+sysdep_dir=$srcdir/sysdeps
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking sysdep dirs" >&5
+$as_echo_n "checking sysdep dirs... " >&6; }
+# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
+os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
+
+test "x$base_os" != x || case "$os" in
+gnu*)
+  base_os=mach/hurd ;;
+linux*)
+  base_os=unix/sysv ;;
+esac
 
+# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
+tail=$os
+ostry=$os
+while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
+  ostry="$ostry /$o"
+  tail=$o
+done
+o=`echo $tail | sed 's/[0-9]*$//'`
+if test $o != $tail; then
+  ostry="$ostry /$o"
 fi
-if test -z "$ac_cv_prog_NM"; then
-  ac_ct_NM=$NM
-  # Extract the first word of "nm", so it can be a program name with args.
-set dummy nm; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_NM+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_NM"; then
-  ac_cv_prog_ac_ct_NM="$ac_ct_NM" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_NM="nm"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
+# For linux-gnu, try linux-gnu, then linux.
+o=`echo $tail | sed 's/-.*$//'`
+if test $o != $tail; then
+  ostry="$ostry /$o"
+fi
+
+# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
+base=
+tail=$base_os
+while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
+  set $b
+  base="$base /$1"
+  tail="$2"
+done
+
+# For sparc/sparc32, try sparc/sparc32 and then sparc.
+mach=
+tail=$machine${submachine:+/$submachine}
+while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
+  set $m
+  # Prepend the machine's FPU directory unless the architecture specific
+  # preconfigure disables it.
+  if test "$libc_cv_with_fp" = yes; then
+    maybe_fpu=/fpu
+  else
+    maybe_fpu=/nofpu
   fi
+  # For each machine term, try it with and then without /multiarch.
+  for try_fpu in $maybe_fpu ''; do
+    for try_multi in $multi_arch_d ''; do
+      mach="$mach /$1$try_fpu$try_multi"
+    done
+  done
+  tail="$2"
 done
+
+
+# Find what sysdep directories exist.
+sysnames=
+for b in $base ''; do
+  for m0 in $mach ''; do
+    for v in /$vendor ''; do
+      test "$v" = / && continue
+      for o in /$ostry ''; do
+	test "$o" = / && continue
+	for m in $mach ''; do
+	  try_suffix="$m0$b$v$o$m"
+	  if test -n "$try_suffix"; then
+	    try_srcdir="${srcdir}/"
+	    try="sysdeps$try_suffix"
+	    test -n "$enable_debug_configure" &&
+	    echo "$0 DEBUG: try $try" >&2
+	    if test -d "$try_srcdir$try"; then
+	      sysnames="$sysnames $try"
+	      { test -n "$o" || test -n "$b"; } && os_used=t
+	      { test -n "$m" || test -n "$m0"; } && machine_used=t
+	      case x${m0:-$m} in
+	      x*/$submachine) submachine_used=t ;;
+	      esac
+	    fi
+	  fi
+	done
+      done
+    done
   done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_NM=$ac_cv_prog_ac_ct_NM
-if test -n "$ac_ct_NM"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NM" >&5
-$as_echo "$ac_ct_NM" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
+done
 
-  if test "x$ac_ct_NM" = x; then
-    NM="false"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
+# If the assembler supports gnu_indirect_function symbol type and the
+# architecture supports multi-arch, we enable multi-arch by default.
+case $sysnames in
+*"$multi_arch_d"*)
+  ;;
+*)
+  test x"$multi_arch" = xdefault && multi_arch=no
+  ;;
 esac
-    NM=$ac_ct_NM
-  fi
-else
-  NM="$ac_cv_prog_NM"
-fi
+if test x"$multi_arch" != xno; then
+  $as_echo "#define USE_MULTIARCH 1" >>confdefs.h
 
+fi
 
-if test "x$maintainer" = "xyes"; then
-  for ac_prog in autoconf
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AUTOCONF+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$AUTOCONF"; then
-  ac_cv_prog_AUTOCONF="$AUTOCONF" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AUTOCONF="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
 
+if test -z "$os_used" && test "$os" != none; then
+  as_fn_error $? "Operating system $os is not supported." "$LINENO" 5
 fi
+if test -z "$machine_used" && test "$machine" != none; then
+  as_fn_error $? "The $machine is not supported." "$LINENO" 5
 fi
-AUTOCONF=$ac_cv_prog_AUTOCONF
-if test -n "$AUTOCONF"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AUTOCONF" >&5
-$as_echo "$AUTOCONF" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+if test -z "$submachine_used" && test -n "$submachine"; then
+  as_fn_error $? "The $submachine subspecies of $host_cpu is not supported." "$LINENO" 5
 fi
 
 
-  test -n "$AUTOCONF" && break
-done
-test -n "$AUTOCONF" || AUTOCONF="no"
+# We have now validated the configuration.
 
-  case "x$AUTOCONF" in
-  xno|x|x:) AUTOCONF=no ;;
-  *)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking   whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works" >&5
-$as_echo_n "checking   whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works... " >&6; }
-if ${libc_cv_autoconf_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-      if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then
-      libc_cv_autoconf_works=yes
-    else
-      libc_cv_autoconf_works=no
-    fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_autoconf_works" >&5
-$as_echo "$libc_cv_autoconf_works" >&6; }
-    test $libc_cv_autoconf_works = yes || AUTOCONF=no
-    ;;
+# Expand the list of system names into a full list of directories
+# from each element's parent name and Implies file (if present).
+set $sysnames
+names=
+while test $# -gt 0; do
+  name=$1
+  shift
+
+  case " $names " in *" $name "*)
+    # Already in the list.
+    continue
   esac
-  if test "x$AUTOCONF" = xno; then
-    aux_missing="$aux_missing autoconf"
-  fi
-else
-  AUTOCONF=no
-fi
 
-# Check for python3 if available, or else python.
-for ac_prog in python3 python
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_PYTHON_PROG+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$PYTHON_PROG"; then
-  ac_cv_prog_PYTHON_PROG="$PYTHON_PROG" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_PYTHON_PROG="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
+  # Report each name as we discover it, so there is no long pause in output.
+  echo $ECHO_N "$name $ECHO_C" >&6
 
-fi
-fi
-PYTHON_PROG=$ac_cv_prog_PYTHON_PROG
-if test -n "$PYTHON_PROG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON_PROG" >&5
-$as_echo "$PYTHON_PROG" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
+  name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
 
+  case $name in
+    /*) xsrcdir= ;;
+    *)  xsrcdir=$srcdir/ ;;
+  esac
+  test -n "$enable_debug_configure" &&
+  echo "DEBUG: name/Implies $xsrcdir$name/Implies" >&2
 
-  test -n "$PYTHON_PROG" && break
-done
+  for implies_file in Implies Implies-before Implies-after; do
+    implies_type=`echo $implies_file | sed s/-/_/`
+    eval ${implies_type}=
+    if test -f $xsrcdir$name/$implies_file; then
+      # Collect more names from the `Implies' file (removing comments).
+      implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
+      for x in $implied_candidate; do
+	found=no
+	if test -d $xsrcdir$name_base/$x; then
+	  eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
+	  found=yes
+	fi
+	try="sysdeps/$x"
+	try_srcdir=$srcdir/
+	test -n "$enable_debug_configure" &&
+	 echo "DEBUG: $name $implies_file $x try() {$try_srcdir}$try" >&2
+	if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
+	then
+	  eval "${implies_type}=\"\$${implies_type} \$try\""
+	  found=yes
+	fi
+	if test $found = no; then
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $name/$implies_file specifies nonexistent $x" >&5
+$as_echo "$as_me: WARNING: $name/$implies_file specifies nonexistent $x" >&2;}
+	fi
+      done
+    fi
+  done
 
-if test -z "$PYTHON_PROG"; then
-  ac_verc_fail=yes
-else
-  # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $PYTHON_PROG" >&5
-$as_echo_n "checking version of $PYTHON_PROG... " >&6; }
-  ac_prog_version=`$PYTHON_PROG --version 2>&1 | sed -n 's/^.*Python \([0-9][0-9.]*\).*$/\1/p'`
-  case $ac_prog_version in
-    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-    3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*)
-       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
-    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+  # Add NAME to the list of names.
+  names="$names $name"
 
-  esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
-$as_echo "$ac_prog_version" >&6; }
-fi
-if test $ac_verc_fail = yes; then
-  critic_missing="$critic_missing python"
-fi
+  # Find the parent of NAME, using the empty string if it has none.
+  parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
 
-PYTHON="$PYTHON_PROG -B"
+  test -n "$enable_debug_configure" &&
+    echo "DEBUG: $name Implies='$Implies' rest='$*' parent='$parent' \
+Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
 
+  # Add the names implied by NAME, and NAME's parent (if it has one), to
+  # the list of names to be processed (the argument list).  We prepend the
+  # implied names to the list and append the parent.  We want implied
+  # directories to come before further directories inferred from the
+  # configuration components; this ensures that for sysv4, unix/common
+  # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
+  # after sysv4).
+  sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
+  test -n "$sysnames" && set $sysnames
+done
 
-test -n "$critic_missing" && as_fn_error $? "
-*** These critical programs are missing or too old:$critic_missing
-*** Check the INSTALL file for required versions." "$LINENO" 5
+# Add the default directories.
+default_sysnames="sysdeps/generic"
+sysnames="$names $default_sysnames"
 
-test -n "$aux_missing" && { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:
-*** These auxiliary programs are missing or incompatible versions:$aux_missing
-*** some features or tests will be disabled.
-*** Check the INSTALL file for required versions." >&5
-$as_echo "$as_me: WARNING:
-*** These auxiliary programs are missing or incompatible versions:$aux_missing
-*** some features or tests will be disabled.
-*** Check the INSTALL file for required versions." >&2;}
+# The other names were emitted during the scan.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $default_sysnames" >&5
+$as_echo "$default_sysnames" >&6; }
 
 # if using special system headers, find out the compiler's sekrit
 # header directory and add that to the list.  NOTE: Only does the right
diff --git a/configure.ac b/configure.ac
index 20b5e8043f..5709c7a0cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -560,6 +560,125 @@  fi
 test -n "$base_machine" || base_machine=$machine
 AC_SUBST(base_machine)
 
+### Locate tools.
+
+AC_PROG_INSTALL
+if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
+  # The makefiles need to use a different form to find it in $srcdir.
+  INSTALL='\$(..)./scripts/install-sh -c'
+fi
+AC_PROG_LN_S
+
+LIBC_PROG_BINUTILS
+
+# Accept binutils 2.25 or newer.
+AC_CHECK_PROG_VER(AS, $AS, --version,
+		  [GNU assembler.* \([0-9]*\.[0-9.]*\)],
+		  [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
+		  AS=: critic_missing="$critic_missing as")
+
+libc_cv_with_lld=no
+case $($LD --version) in
+  "GNU gold"*)
+  # Accept gold 1.14 or higher
+    AC_CHECK_PROG_VER(LD, $LD, --version,
+		    [GNU gold.* \([0-9][0-9]*\.[0-9.]*\)],
+		    [1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*],
+		    LD=: critic_missing="$critic_missing GNU gold")
+    ;;
+  "LLD"*)
+  # Accept LLD 13.0.0 or higher
+    AC_CHECK_PROG_VER(LD, $LD, --version,
+		    [LLD.* \([0-9][0-9]*\.[0-9.]*\)],
+		    [1[3-9].*|[2-9][0-9].*],
+		    LD=: critic_missing="$critic_missing LLD")
+    libc_cv_with_lld=yes
+    ;;
+  *)
+    AC_CHECK_PROG_VER(LD, $LD, --version,
+		    [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
+		    [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
+		    LD=: critic_missing="$critic_missing GNU ld")
+    ;;
+esac
+LIBC_CONFIG_VAR([with-lld], [$libc_cv_with_lld])
+
+# These programs are version sensitive.
+AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
+  [GNU Make[^0-9]*\([0-9][0-9.]*\)],
+  [[4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make")
+
+AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
+  [GNU gettext.* \([0-9]*\.[0-9.]*\)],
+  [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
+  MSGFMT=: aux_missing="$aux_missing msgfmt")
+AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
+  [GNU texinfo.* \([0-9][0-9.]*\)],
+  [4.[7-9]*|4.[1-9][0-9]*|[5-9].*],
+  MAKEINFO=: aux_missing="$aux_missing makeinfo")
+AC_CHECK_PROG_VER(SED, sed, --version,
+  [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
+  [3.0[2-9]*|3.[1-9]*|[4-9]*],
+  SED=: aux_missing="$aux_missing sed")
+AC_CHECK_PROG_VER(AWK, gawk, --version,
+  [GNU Awk[^0-9]*\([0-9][0-9.]*\)],
+  [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk")
+AC_CHECK_PROG_VER(BISON, bison, --version,
+  [bison (GNU Bison) \([0-9]*\.[0-9.]*\)],
+  [2.7*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing bison")
+
+AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [
+AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
+#if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2)
+#error insufficient compiler
+#endif]])],
+	       [libc_cv_compiler_ok=yes],
+	       [libc_cv_compiler_ok=no])])
+AS_IF([test $libc_cv_compiler_ok != yes],
+      [critic_missing="$critic_missing compiler"])
+
+AC_CHECK_TOOL(NM, nm, false)
+
+if test "x$maintainer" = "xyes"; then
+  AC_CHECK_PROGS(AUTOCONF, autoconf, no)
+  case "x$AUTOCONF" in
+  xno|x|x:) AUTOCONF=no ;;
+  *)
+    AC_CACHE_CHECK(dnl
+  whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
+    if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then
+      libc_cv_autoconf_works=yes
+    else
+      libc_cv_autoconf_works=no
+    fi])
+    test $libc_cv_autoconf_works = yes || AUTOCONF=no
+    ;;
+  esac
+  if test "x$AUTOCONF" = xno; then
+    aux_missing="$aux_missing autoconf"
+  fi
+else
+  AUTOCONF=no
+fi
+
+# Check for python3 if available, or else python.
+AC_CHECK_PROG_VER(PYTHON_PROG, python3 python, --version,
+  [Python \([0-9][0-9.]*\)],
+  [3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*],
+  critic_missing="$critic_missing python")
+PYTHON="$PYTHON_PROG -B"
+AC_SUBST(PYTHON)
+
+test -n "$critic_missing" && AC_MSG_ERROR([
+*** These critical programs are missing or too old:$critic_missing
+*** Check the INSTALL file for required versions.])
+
+test -n "$aux_missing" && AC_MSG_WARN([
+*** These auxiliary programs are missing or incompatible versions:$aux_missing
+*** some features or tests will be disabled.
+*** Check the INSTALL file for required versions.])
+
+
 # Determine whether to use fpu or nofpu sysdeps directories.
 AC_CACHE_CHECK([for use of fpu sysdeps directories],
 	       libc_cv_with_fp, [dnl
@@ -991,125 +1110,6 @@  AC_SUBST(sysnames)
 # The other names were emitted during the scan.
 AC_MSG_RESULT($default_sysnames)
 
-
-### Locate tools.
-
-AC_PROG_INSTALL
-if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
-  # The makefiles need to use a different form to find it in $srcdir.
-  INSTALL='\$(..)./scripts/install-sh -c'
-fi
-AC_PROG_LN_S
-
-LIBC_PROG_BINUTILS
-
-# Accept binutils 2.25 or newer.
-AC_CHECK_PROG_VER(AS, $AS, --version,
-		  [GNU assembler.* \([0-9]*\.[0-9.]*\)],
-		  [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
-		  AS=: critic_missing="$critic_missing as")
-
-libc_cv_with_lld=no
-case $($LD --version) in
-  "GNU gold"*)
-  # Accept gold 1.14 or higher
-    AC_CHECK_PROG_VER(LD, $LD, --version,
-		    [GNU gold.* \([0-9][0-9]*\.[0-9.]*\)],
-		    [1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*],
-		    LD=: critic_missing="$critic_missing GNU gold")
-    ;;
-  "LLD"*)
-  # Accept LLD 13.0.0 or higher
-    AC_CHECK_PROG_VER(LD, $LD, --version,
-		    [LLD.* \([0-9][0-9]*\.[0-9.]*\)],
-		    [1[3-9].*|[2-9][0-9].*],
-		    LD=: critic_missing="$critic_missing LLD")
-    libc_cv_with_lld=yes
-    ;;
-  *)
-    AC_CHECK_PROG_VER(LD, $LD, --version,
-		    [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
-		    [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
-		    LD=: critic_missing="$critic_missing GNU ld")
-    ;;
-esac
-LIBC_CONFIG_VAR([with-lld], [$libc_cv_with_lld])
-
-# These programs are version sensitive.
-AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
-  [GNU Make[^0-9]*\([0-9][0-9.]*\)],
-  [[4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make")
-
-AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
-  [GNU gettext.* \([0-9]*\.[0-9.]*\)],
-  [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
-  MSGFMT=: aux_missing="$aux_missing msgfmt")
-AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
-  [GNU texinfo.* \([0-9][0-9.]*\)],
-  [4.[7-9]*|4.[1-9][0-9]*|[5-9].*],
-  MAKEINFO=: aux_missing="$aux_missing makeinfo")
-AC_CHECK_PROG_VER(SED, sed, --version,
-  [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
-  [3.0[2-9]*|3.[1-9]*|[4-9]*],
-  SED=: aux_missing="$aux_missing sed")
-AC_CHECK_PROG_VER(AWK, gawk, --version,
-  [GNU Awk[^0-9]*\([0-9][0-9.]*\)],
-  [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk")
-AC_CHECK_PROG_VER(BISON, bison, --version,
-  [bison (GNU Bison) \([0-9]*\.[0-9.]*\)],
-  [2.7*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing bison")
-
-AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [
-AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
-#if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2)
-#error insufficient compiler
-#endif]])],
-	       [libc_cv_compiler_ok=yes],
-	       [libc_cv_compiler_ok=no])])
-AS_IF([test $libc_cv_compiler_ok != yes],
-      [critic_missing="$critic_missing compiler"])
-
-AC_CHECK_TOOL(NM, nm, false)
-
-if test "x$maintainer" = "xyes"; then
-  AC_CHECK_PROGS(AUTOCONF, autoconf, no)
-  case "x$AUTOCONF" in
-  xno|x|x:) AUTOCONF=no ;;
-  *)
-    AC_CACHE_CHECK(dnl
-  whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
-    if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then
-      libc_cv_autoconf_works=yes
-    else
-      libc_cv_autoconf_works=no
-    fi])
-    test $libc_cv_autoconf_works = yes || AUTOCONF=no
-    ;;
-  esac
-  if test "x$AUTOCONF" = xno; then
-    aux_missing="$aux_missing autoconf"
-  fi
-else
-  AUTOCONF=no
-fi
-
-# Check for python3 if available, or else python.
-AC_CHECK_PROG_VER(PYTHON_PROG, python3 python, --version,
-  [Python \([0-9][0-9.]*\)],
-  [3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*],
-  critic_missing="$critic_missing python")
-PYTHON="$PYTHON_PROG -B"
-AC_SUBST(PYTHON)
-
-test -n "$critic_missing" && AC_MSG_ERROR([
-*** These critical programs are missing or too old:$critic_missing
-*** Check the INSTALL file for required versions.])
-
-test -n "$aux_missing" && AC_MSG_WARN([
-*** These auxiliary programs are missing or incompatible versions:$aux_missing
-*** some features or tests will be disabled.
-*** Check the INSTALL file for required versions.])
-
 # if using special system headers, find out the compiler's sekrit
 # header directory and add that to the list.  NOTE: Only does the right
 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)