Use AC_LANG_PROGRAM in nss-crypt check.

3 files changed, 194 insertions, 154 deletions

diff --git a/ChangeLog b/ChangeLog
index 3cb0de3..c5dff27 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2011-06-10  Roland McGrath  <roland@hack.frob.com>
 
+	* configure.in (nss-crypt check): Use AC_LANG_PROGRAM.
+	* configure: Regenerated.
+
 	* Makerules: Revert last change.
 	* elf/Makefile: Likewise.
 
diff --git a/configure b/configure
index 6cf85e5..1db57ae 100755
--- a/configure
+++ b/configure
@@ -1,7 +1,7 @@
 #! /bin/sh
 # From configure.in CVSid.
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.66 for GNU C Library (see version.h).
+# Generated by GNU Autoconf 2.68 for GNU C Library (see version.h).
 #
 # Report bugs to <glibc>.
 #
@@ -92,6 +92,7 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -217,11 +218,18 @@ IFS=$as_save_IFS
   # We cannot yet assume a decent shell, so we have to provide a
 	# neutralization value for shells without unset; and this also
 	# works around shells that cannot unset nonexistent variables.
+	# Preserve -v and -x to the replacement shell.
 	BASH_ENV=/dev/null
 	ENV=/dev/null
 	(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
 	export CONFIG_SHELL
-	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
+	case $- in # ((((
+	  *v*x* | *x*v* ) as_opts=-vx ;;
+	  *v* ) as_opts=-v ;;
+	  *x* ) as_opts=-x ;;
+	  * ) as_opts= ;;
+	esac
+	exec "$CONFIG_SHELL" $as_opts "$as_myself" ${1+"$@"}
 fi
 
     if test x$as_have_required = xno; then :
@@ -861,8 +869,9 @@ do
   fi
 
   case $ac_option in
-  *=*)	ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
-  *)	ac_optarg=yes ;;
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
   esac
 
   # Accept the important Cygnus configure options, so we can diagnose typos.
@@ -1202,7 +1211,7 @@ Try \`$0 --help' for more information"
     $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
       $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
-    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
+    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
     ;;
 
   esac
@@ -1544,7 +1553,7 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 GNU C Library configure (see version.h)
-generated by GNU Autoconf 2.66
+generated by GNU Autoconf 2.68
 
 Copyright (C) 2010 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
@@ -1590,7 +1599,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_compile
@@ -1616,7 +1625,7 @@ $as_echo "$ac_try_echo"; } >&5
     mv -f conftest.er1 conftest.err
   fi
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } >/dev/null && {
+  test $ac_status = 0; } > conftest.i && {
 	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        }; then :
@@ -1627,7 +1636,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
     ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_cpp
@@ -1665,7 +1674,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_cxx_try_compile
@@ -1711,7 +1720,7 @@ fi
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
@@ -1753,7 +1762,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
        ac_retval=$ac_status
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_run
@@ -1931,7 +1940,7 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 rm -f conftest.val
 
   fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_compute_int
@@ -1945,7 +1954,7 @@ ac_fn_c_check_header_compile ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval "test \"\${$3+set}\"" = set; then :
+if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -1963,7 +1972,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_compile
 cat >config.log <<_ACEOF
@@ -1971,7 +1980,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by GNU C Library $as_me (see version.h), which was
-generated by GNU Autoconf 2.66.  Invocation command line was
+generated by GNU Autoconf 2.68.  Invocation command line was
 
   $ $0 $@
 
@@ -2362,7 +2371,7 @@ $SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
 $as_echo_n "checking build system type... " >&6; }
-if test "${ac_cv_build+set}" = set; then :
+if ${ac_cv_build+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_build_alias=$build_alias
@@ -2396,7 +2405,7 @@ case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
 $as_echo_n "checking host system type... " >&6; }
-if test "${ac_cv_host+set}" = set; then :
+if ${ac_cv_host+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test "x$host_alias" = x; then
@@ -2438,7 +2447,7 @@ if test -n "$ac_tool_prefix"; then
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2478,7 +2487,7 @@ if test -z "$ac_cv_prog_CC"; then
 set dummy gcc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -2531,7 +2540,7 @@ if test -z "$CC"; then
 set dummy ${ac_tool_prefix}cc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2571,7 +2580,7 @@ if test -z "$CC"; then
 set dummy cc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2630,7 +2639,7 @@ if test -z "$CC"; then
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -2674,7 +2683,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -2759,7 +2768,7 @@ done
 EXEEXT=
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 $as_echo_n "checking for suffix of object files... " >&6; }
-if test "${ac_cv_objext+set}" = set; then :
+if ${ac_cv_objext+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -2810,7 +2819,7 @@ OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
 $as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if test "${ac_cv_c_compiler_gnu+set}" = set; then :
+if ${ac_cv_c_compiler_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -2847,7 +2856,7 @@ ac_test_CFLAGS=${CFLAGS+set}
 ac_save_CFLAGS=$CFLAGS
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 $as_echo_n "checking whether $CC accepts -g... " >&6; }
-if test "${ac_cv_prog_cc_g+set}" = set; then :
+if ${ac_cv_prog_cc_g+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_c_werror_flag=$ac_c_werror_flag
@@ -2925,7 +2934,7 @@ else
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
 $as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if test "${ac_cv_prog_cc_c89+set}" = set; then :
+if ${ac_cv_prog_cc_c89+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_prog_cc_c89=no
@@ -3027,7 +3036,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_BUILD_CC+set}" = set; then :
+if ${ac_cv_prog_BUILD_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$BUILD_CC"; then
@@ -3077,7 +3086,7 @@ if test -n "$CPP" && test -d "$CPP"; then
   CPP=
 fi
 if test -z "$CPP"; then
-  if test "${ac_cv_prog_CPP+set}" = set; then :
+  if ${ac_cv_prog_CPP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
       # Double quotes because CPP needs to be expanded
@@ -3107,7 +3116,7 @@ else
   # Broken: fails on valid input.
 continue
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
@@ -3123,11 +3132,11 @@ else
 ac_preproc_ok=:
 break
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok; then :
   break
 fi
@@ -3166,7 +3175,7 @@ else
   # Broken: fails on valid input.
 continue
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
@@ -3182,11 +3191,11 @@ else
 ac_preproc_ok=:
 break
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok; then :
 
 else
@@ -3219,7 +3228,7 @@ if test -z "$CXX"; then
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CXX+set}" = set; then :
+if ${ac_cv_prog_CXX+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CXX"; then
@@ -3263,7 +3272,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CXX+set}" = set; then :
+if ${ac_cv_prog_ac_ct_CXX+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CXX"; then
@@ -3341,7 +3350,7 @@ done
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C++ compiler" >&5
 $as_echo_n "checking whether we are using the GNU C++ compiler... " >&6; }
-if test "${ac_cv_cxx_compiler_gnu+set}" = set; then :
+if ${ac_cv_cxx_compiler_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -3378,7 +3387,7 @@ ac_test_CXXFLAGS=${CXXFLAGS+set}
 ac_save_CXXFLAGS=$CXXFLAGS
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CXX accepts -g" >&5
 $as_echo_n "checking whether $CXX accepts -g... " >&6; }
-if test "${ac_cv_prog_cxx_g+set}" = set; then :
+if ${ac_cv_prog_cxx_g+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_cxx_werror_flag=$ac_cxx_werror_flag
@@ -3785,6 +3794,13 @@ typedef int PRBool;
 #include <hasht.h>
 #include <nsslowhash.h>
 void f (void) { NSSLOW_Init (); }
+int
+main ()
+{
+
+  ;
+  return 0;
+}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   libc_cv_nss_crypt=yes
@@ -4109,7 +4125,7 @@ fi
 # For the multi-arch option we need support in the assembler.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler gnu_indirect_function symbol type support" >&5
 $as_echo_n "checking for assembler gnu_indirect_function symbol type support... " >&6; }
-if test "${libc_cv_asm_gnu_indirect_function+set}" = set; then :
+if ${libc_cv_asm_gnu_indirect_function+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -4128,7 +4144,7 @@ $as_echo "$libc_cv_asm_gnu_indirect_function" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether .text pseudo-op must be used" >&5
 $as_echo_n "checking whether .text pseudo-op must be used... " >&6; }
-if test "${libc_cv_dot_text+set}" = set; then :
+if ${libc_cv_dot_text+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -4156,7 +4172,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler global-symbol directive" >&5
 $as_echo_n "checking for assembler global-symbol directive... " >&6; }
-if test "${libc_cv_asm_global_directive+set}" = set; then :
+if ${libc_cv_asm_global_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   libc_cv_asm_global_directive=UNKNOWN
@@ -4191,7 +4207,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler .type directive prefix" >&5
 $as_echo_n "checking for assembler .type directive prefix... " >&6; }
-if test "${libc_cv_asm_type_prefix+set}" = set; then :
+if ${libc_cv_asm_type_prefix+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   libc_cv_asm_type_prefix=no
@@ -4564,7 +4580,7 @@ done
 { $as_echo "$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 test "${ac_cv_path_install+set}" = set; then :
+if ${ac_cv_path_install+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4672,7 +4688,7 @@ OBJDUMP=`$CC -print-prog-name=objdump`
 # 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 $AS is GNU as... " >&6; }
-if test "${libc_cv_prog_as_gnu+set}" = set; then :
+if ${libc_cv_prog_as_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   # Most GNU programs take a -v and spit out some text including
@@ -4691,7 +4707,7 @@ gnu_as=$libc_cv_prog_as_gnu
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $LD is GNU ld" >&5
 $as_echo_n "checking whether $LD is GNU ld... " >&6; }
-if test "${libc_cv_prog_ld_gnu+set}" = set; then :
+if ${libc_cv_prog_ld_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   # Most GNU programs take a -v and spit out some text including
@@ -4715,7 +4731,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_AS+set}" = set; then :
+if ${ac_cv_prog_AS+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AS"; then
@@ -4778,7 +4794,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_LD+set}" = set; then :
+if ${ac_cv_prog_LD+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$LD"; then
@@ -4845,7 +4861,7 @@ fi
 set dummy pwd; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_PWD_P+set}" = set; then :
+if ${ac_cv_path_PWD_P+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $PWD_P in
@@ -4894,7 +4910,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -4957,7 +4973,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MAKE+set}" = set; then :
+if ${ac_cv_prog_MAKE+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MAKE"; then
@@ -5021,7 +5037,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MSGFMT+set}" = set; then :
+if ${ac_cv_prog_MSGFMT+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MSGFMT"; then
@@ -5084,7 +5100,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MAKEINFO+set}" = set; then :
+if ${ac_cv_prog_MAKEINFO+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MAKEINFO"; then
@@ -5147,7 +5163,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_SED+set}" = set; then :
+if ${ac_cv_prog_SED+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$SED"; then
@@ -5211,7 +5227,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_AUTOCONF+set}" = set; then :
+if ${ac_cv_prog_AUTOCONF+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AUTOCONF"; then
@@ -5253,7 +5269,7 @@ 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:+ }$ACFLAGS works... " >&6; }
-if test "${libc_cv_autoconf_works+set}" = set; then :
+if ${libc_cv_autoconf_works+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then
@@ -5338,7 +5354,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether GCC supports -static-libgcc" >&5
 $as_echo_n "checking whether GCC supports -static-libgcc... " >&6; }
-if test "${libc_cv_gcc_static_libgcc+set}" = set; then :
+if ${libc_cv_gcc_static_libgcc+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if $CC -v -static-libgcc 2>&1 | grep -q 'unrecognized option.*static-libgcc'; then
@@ -5355,7 +5371,7 @@ $as_echo "$libc_cv_gcc_static_libgcc" >&6; }
 set dummy bash; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_BASH_SHELL+set}" = set; then :
+if ${ac_cv_path_BASH_SHELL+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $BASH_SHELL in
@@ -5406,7 +5422,7 @@ if test "$BASH_SHELL" = no; then
 set dummy ksh; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_KSH+set}" = set; then :
+if ${ac_cv_path_KSH+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $KSH in
@@ -5461,7 +5477,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_AWK+set}" = set; then :
+if ${ac_cv_prog_AWK+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AWK"; then
@@ -5501,7 +5517,7 @@ done
 set dummy perl; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_PERL+set}" = set; then :
+if ${ac_cv_path_PERL+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $PERL in
@@ -5546,7 +5562,7 @@ fi
 set dummy install-info; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_INSTALL_INFO+set}" = set; then :
+if ${ac_cv_path_INSTALL_INFO+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $INSTALL_INFO in
@@ -5588,7 +5604,7 @@ fi
 set dummy bison; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_path_BISON+set}" = set; then :
+if ${ac_cv_path_BISON+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $BISON in
@@ -5629,7 +5645,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for signed size_t type" >&5
 $as_echo_n "checking for signed size_t type... " >&6; }
-if test "${libc_cv_signed_size_t+set}" = set; then :
+if ${libc_cv_signed_size_t+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   echo '#include <stddef.h>
@@ -5653,7 +5669,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libc-friendly stddef.h" >&5
 $as_echo_n "checking for libc-friendly stddef.h... " >&6; }
-if test "${libc_cv_friendly_stddef+set}" = set; then :
+if ${libc_cv_friendly_stddef+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5691,7 +5707,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need to use -P to assemble .S files" >&5
 $as_echo_n "checking whether we need to use -P to assemble .S files... " >&6; }
-if test "${libc_cv_need_minus_P+set}" = set; then :
+if ${libc_cv_need_minus_P+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.S <<EOF
@@ -5719,7 +5735,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .set assembler directive" >&5
 $as_echo_n "checking for .set assembler directive... " >&6; }
-if test "${libc_cv_asm_set_directive+set}" = set; then :
+if ${libc_cv_asm_set_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -5752,7 +5768,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler gnu_unique_object symbol type" >&5
 $as_echo_n "checking for assembler gnu_unique_object symbol type... " >&6; }
-if test "${libc_cv_asm_unique_object+set}" = set; then :
+if ${libc_cv_asm_unique_object+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -5776,7 +5792,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .symver assembler directive" >&5
 $as_echo_n "checking for .symver assembler directive... " >&6; }
-if test "${libc_cv_asm_symver_directive+set}" = set; then :
+if ${libc_cv_asm_symver_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -5795,7 +5811,7 @@ fi
 $as_echo "$libc_cv_asm_symver_directive" >&6; }
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld --version-script" >&5
 $as_echo_n "checking for ld --version-script... " >&6; }
-if test "${libc_cv_ld_version_script_option+set}" = set; then :
+if ${libc_cv_ld_version_script_option+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test $libc_cv_asm_symver_directive = yes; then
@@ -5861,7 +5877,7 @@ fi
 if test $elf = yes; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .previous assembler directive" >&5
 $as_echo_n "checking for .previous assembler directive... " >&6; }
-if test "${libc_cv_asm_previous_directive+set}" = set; then :
+if ${libc_cv_asm_previous_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.s <<EOF
@@ -5888,7 +5904,7 @@ $as_echo "$libc_cv_asm_previous_directive" >&6; }
   else
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .popsection assembler directive" >&5
 $as_echo_n "checking for .popsection assembler directive... " >&6; }
-if test "${libc_cv_asm_popsection_directive+set}" = set; then :
+if ${libc_cv_asm_popsection_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
       cat > conftest.s <<EOF
@@ -5916,7 +5932,7 @@ $as_echo "$libc_cv_asm_popsection_directive" >&6; }
   fi
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .protected and .hidden assembler directive" >&5
 $as_echo_n "checking for .protected and .hidden assembler directive... " >&6; }
-if test "${libc_cv_asm_protected_directive+set}" = set; then :
+if ${libc_cv_asm_protected_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.s <<EOF
@@ -5943,7 +5959,7 @@ $as_echo "$libc_cv_asm_protected_directive" >&6; }
   if test $libc_cv_asm_protected_directive = yes; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __attribute__((visibility())) is supported" >&5
 $as_echo_n "checking whether __attribute__((visibility())) is supported... " >&6; }
-if test "${libc_cv_visibility_attribute+set}" = set; then :
+if ${libc_cv_visibility_attribute+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -5976,7 +5992,7 @@ $as_echo "$libc_cv_visibility_attribute" >&6; }
   if test $libc_cv_visibility_attribute = yes; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken __attribute__((visibility()))" >&5
 $as_echo_n "checking for broken __attribute__((visibility()))... " >&6; }
-if test "${libc_cv_broken_visibility_attribute+set}" = set; then :
+if ${libc_cv_broken_visibility_attribute+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6007,7 +6023,7 @@ $as_echo "$libc_cv_broken_visibility_attribute" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken __attribute__((alias()))" >&5
 $as_echo_n "checking for broken __attribute__((alias()))... " >&6; }
-if test "${libc_cv_broken_alias_attribute+set}" = set; then :
+if ${libc_cv_broken_alias_attribute+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6042,7 +6058,7 @@ $as_echo "$libc_cv_broken_alias_attribute" >&6; }
   if test $libc_cv_visibility_attribute = yes; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to put _rtld_local into .sdata section" >&5
 $as_echo_n "checking whether to put _rtld_local into .sdata section... " >&6; }
-if test "${libc_cv_have_sdata_section+set}" = set; then :
+if ${libc_cv_have_sdata_section+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   echo "int i;" > conftest.c
@@ -6064,7 +6080,7 @@ $as_echo "$libc_cv_have_sdata_section" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .preinit_array/.init_array/.fini_array support" >&5
 $as_echo_n "checking for .preinit_array/.init_array/.fini_array support... " >&6; }
-if test "${libc_cv_initfini_array+set}" = set; then :
+if ${libc_cv_initfini_array+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6107,7 +6123,7 @@ $as_echo "$libc_cv_initfini_array" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libunwind-support in compiler" >&5
 $as_echo_n "checking for libunwind-support in compiler... " >&6; }
-if test "${libc_cv_cc_with_libunwind+set}" = set; then :
+if ${libc_cv_cc_with_libunwind+:} false; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -6132,7 +6148,7 @@ $as_echo "$libc_cv_cc_with_libunwind" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z nodelete option" >&5
 $as_echo_n "checking for -z nodelete option... " >&6; }
-if test "${libc_cv_z_nodelete+set}" = set; then :
+if ${libc_cv_z_nodelete+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6159,7 +6175,7 @@ $as_echo "$libc_cv_z_nodelete" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z nodlopen option" >&5
 $as_echo_n "checking for -z nodlopen option... " >&6; }
-if test "${libc_cv_z_nodlopen+set}" = set; then :
+if ${libc_cv_z_nodlopen+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6186,7 +6202,7 @@ $as_echo "$libc_cv_z_nodlopen" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z initfirst option" >&5
 $as_echo_n "checking for -z initfirst option... " >&6; }
-if test "${libc_cv_z_initfirst+set}" = set; then :
+if ${libc_cv_z_initfirst+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6215,7 +6231,7 @@ $as_echo "$libc_cv_z_initfirst" >&6; }
     i[34567]86 | x86_64 | powerpc* | s390* | sparc* | alpha*)
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z relro option" >&5
 $as_echo_n "checking for -z relro option... " >&6; }
-if test "${libc_cv_z_relro+set}" = set; then :
+if ${libc_cv_z_relro+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     libc_cv_z_relro=no
@@ -6248,7 +6264,7 @@ $as_echo "$libc_cv_z_relro" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Bgroup option" >&5
 $as_echo_n "checking for -Bgroup option... " >&6; }
-if test "${libc_cv_Bgroup+set}" = set; then :
+if ${libc_cv_Bgroup+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6275,7 +6291,7 @@ $as_echo "$libc_cv_Bgroup" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libgcc_s suffix" >&5
 $as_echo_n "checking for libgcc_s suffix... " >&6; }
-if test "${libc_cv_libgcc_s_suffix+set}" = set; then :
+if ${libc_cv_libgcc_s_suffix+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6293,7 +6309,7 @@ $as_echo "$libc_cv_libgcc_s_suffix" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for --as-needed option" >&5
 $as_echo_n "checking for --as-needed option... " >&6; }
-if test "${libc_cv_as_needed+set}" = set; then :
+if ${libc_cv_as_needed+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6322,7 +6338,7 @@ $as_echo "$libc_cv_as_needed" >&6; }
   ASFLAGS_config=
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether --noexecstack is desirable for .S files" >&5
 $as_echo_n "checking whether --noexecstack is desirable for .S files... " >&6; }
-if test "${libc_cv_as_noexecstack+set}" = set; then :
+if ${libc_cv_as_noexecstack+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6359,7 +6375,7 @@ $as_echo "$libc_cv_as_noexecstack" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z combreloc" >&5
 $as_echo_n "checking for -z combreloc... " >&6; }
-if test "${libc_cv_z_combreloc+set}" = set; then :
+if ${libc_cv_z_combreloc+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6397,7 +6413,7 @@ $as_echo "$libc_cv_z_combreloc" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z execstack" >&5
 $as_echo_n "checking for -z execstack... " >&6; }
-if test "${libc_cv_z_execstack+set}" = set; then :
+if ${libc_cv_z_execstack+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6425,7 +6441,7 @@ $as_echo "$libc_cv_z_execstack" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fpie" >&5
 $as_echo_n "checking for -fpie... " >&6; }
-if test "${libc_cv_fpie+set}" = set; then :
+if ${libc_cv_fpie+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6453,7 +6469,7 @@ $as_echo "$libc_cv_fpie" >&6; }
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for --hash-style option" >&5
 $as_echo_n "checking for --hash-style option... " >&6; }
-if test "${libc_cv_hashstyle+set}" = set; then :
+if ${libc_cv_hashstyle+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<EOF
@@ -6481,7 +6497,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fno-toplevel-reorder -fno-section-anchors" >&5
 $as_echo_n "checking for -fno-toplevel-reorder -fno-section-anchors... " >&6; }
-if test "${libc_cv_fno_toplevel_reorder+set}" = set; then :
+if ${libc_cv_fno_toplevel_reorder+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6512,7 +6528,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector" >&5
 $as_echo_n "checking for -fstack-protector... " >&6; }
-if test "${libc_cv_ssp+set}" = set; then :
+if ${libc_cv_ssp+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6539,7 +6555,7 @@ $as_echo "$libc_cv_ssp" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fgnu89-inline" >&5
 $as_echo_n "checking for -fgnu89-inline... " >&6; }
-if test "${libc_cv_gnu89_inline+set}" = set; then :
+if ${libc_cv_gnu89_inline+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6576,7 +6592,7 @@ fi
 if test $elf != yes; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for .init and .fini sections" >&5
 $as_echo_n "checking for .init and .fini sections... " >&6; }
-if test "${libc_cv_have_initfini+set}" = set; then :
+if ${libc_cv_have_initfini+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6610,7 +6626,7 @@ fi
 if test $elf = yes; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether cc puts quotes around section names" >&5
 $as_echo_n "checking whether cc puts quotes around section names... " >&6; }
-if test "${libc_cv_have_section_quotes+set}" = set; then :
+if ${libc_cv_have_section_quotes+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6645,7 +6661,7 @@ else
   if test $ac_cv_prog_cc_works = yes; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _ prefix on C symbol names" >&5
 $as_echo_n "checking for _ prefix on C symbol names... " >&6; }
-if test "${libc_cv_asm_underscores+set}" = set; then :
+if ${libc_cv_asm_underscores+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6672,7 +6688,7 @@ $as_echo "$libc_cv_asm_underscores" >&6; }
   else
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _ prefix on C symbol names" >&5
 $as_echo_n "checking for _ prefix on C symbol names... " >&6; }
-if test "${libc_cv_asm_underscores+set}" = set; then :
+if ${libc_cv_asm_underscores+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.$ac_ext <<EOF
@@ -6716,7 +6732,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler .weak directive" >&5
 $as_echo_n "checking for assembler .weak directive... " >&6; }
-if test "${libc_cv_asm_weak_directive+set}" = set; then :
+if ${libc_cv_asm_weak_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -6744,7 +6760,7 @@ $as_echo "$libc_cv_asm_weak_directive" >&6; }
 if test $libc_cv_asm_weak_directive = no; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler .weakext directive" >&5
 $as_echo_n "checking for assembler .weakext directive... " >&6; }
-if test "${libc_cv_asm_weakext_directive+set}" = set; then :
+if ${libc_cv_asm_weakext_directive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.s <<EOF
@@ -6783,7 +6799,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether CFI directives are supported" >&5
 $as_echo_n "checking whether CFI directives are supported... " >&6; }
-if test "${libc_cv_asm_cfi_directives+set}" = set; then :
+if ${libc_cv_asm_cfi_directives+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   case $machine in
@@ -6820,7 +6836,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld --no-whole-archive" >&5
 $as_echo_n "checking for ld --no-whole-archive... " >&6; }
-if test "${libc_cv_ld_no_whole_archive+set}" = set; then :
+if ${libc_cv_ld_no_whole_archive+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<\EOF
@@ -6850,7 +6866,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc -fexceptions" >&5
 $as_echo_n "checking for gcc -fexceptions... " >&6; }
-if test "${libc_cv_gcc_exceptions+set}" = set; then :
+if ${libc_cv_gcc_exceptions+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<\EOF
@@ -6883,7 +6899,7 @@ if test "$host_cpu" = powerpc ; then
 # and versions 1.0.x of EGCS.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether clobbering cr0 causes problems" >&5
 $as_echo_n "checking whether clobbering cr0 causes problems... " >&6; }
-if test "${libc_cv_c_asmcr0_bug+set}" = set; then :
+if ${libc_cv_c_asmcr0_bug+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6914,7 +6930,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_expect" >&5
 $as_echo_n "checking for __builtin_expect... " >&6; }
-if test "${libc_cv_gcc_builtin_expect+set}" = set; then :
+if ${libc_cv_gcc_builtin_expect+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<EOF
@@ -6947,7 +6963,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_memset" >&5
 $as_echo_n "checking for __builtin_memset... " >&6; }
-if test "${libc_cv_gcc_builtin_memset+set}" = set; then :
+if ${libc_cv_gcc_builtin_memset+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<\EOF
@@ -6978,7 +6994,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for redirection of built-in functions" >&5
 $as_echo_n "checking for redirection of built-in functions... " >&6; }
-if test "${libc_cv_gcc_builtin_redirection+set}" = set; then :
+if ${libc_cv_gcc_builtin_redirection+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<\EOF
@@ -7011,7 +7027,7 @@ fi
 if test "x$use__thread" != xno; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __thread" >&5
 $as_echo_n "checking for __thread... " >&6; }
-if test "${libc_cv_gcc___thread+set}" = set; then :
+if ${libc_cv_gcc___thread+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.c <<\EOF
@@ -7042,7 +7058,7 @@ fi
 if test "$libc_cv_gcc___thread" = yes; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tls_model attribute" >&5
 $as_echo_n "checking for tls_model attribute... " >&6; }
-if test "${libc_cv_gcc_tls_model_attr+set}" = set; then :
+if ${libc_cv_gcc_tls_model_attr+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     cat > conftest.c <<\EOF
@@ -7071,7 +7087,7 @@ fi
 if test -n "$submachine"; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler option for CPU variant" >&5
 $as_echo_n "checking for compiler option for CPU variant... " >&6; }
-if test "${libc_cv_cc_submachine+set}" = set; then :
+if ${libc_cv_cc_submachine+:} false; then :
   $as_echo_n "(cached) " >&6
 else
     libc_cv_cc_submachine=no
@@ -7139,7 +7155,7 @@ else
   # See if we have the SELinux library
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for is_selinux_enabled in -lselinux" >&5
 $as_echo_n "checking for is_selinux_enabled in -lselinux... " >&6; }
-if test "${ac_cv_lib_selinux_is_selinux_enabled+set}" = set; then :
+if ${ac_cv_lib_selinux_is_selinux_enabled+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -7173,7 +7189,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_selinux_is_selinux_enabled" >&5
 $as_echo "$ac_cv_lib_selinux_is_selinux_enabled" >&6; }
-if test "x$ac_cv_lib_selinux_is_selinux_enabled" = x""yes; then :
+if test "x$ac_cv_lib_selinux_is_selinux_enabled" = xyes; then :
   have_selinux=yes
 else
   have_selinux=no
@@ -7223,7 +7239,7 @@ $as_echo "#define HAVE_SELINUX 1" >>confdefs.h
   # See if we have the libaudit library
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for audit_log_user_avc_message in -laudit" >&5
 $as_echo_n "checking for audit_log_user_avc_message in -laudit... " >&6; }
-if test "${ac_cv_lib_audit_audit_log_user_avc_message+set}" = set; then :
+if ${ac_cv_lib_audit_audit_log_user_avc_message+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -7257,7 +7273,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_audit_audit_log_user_avc_message" >&5
 $as_echo "$ac_cv_lib_audit_audit_log_user_avc_message" >&6; }
-if test "x$ac_cv_lib_audit_audit_log_user_avc_message" = x""yes; then :
+if test "x$ac_cv_lib_audit_audit_log_user_avc_message" = xyes; then :
   have_libaudit=yes
 else
   have_libaudit=no
@@ -7273,7 +7289,7 @@ $as_echo "#define HAVE_LIBAUDIT 1" >>confdefs.h
   # See if we have the libcap library
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for cap_init in -lcap" >&5
 $as_echo_n "checking for cap_init in -lcap... " >&6; }
-if test "${ac_cv_lib_cap_cap_init+set}" = set; then :
+if ${ac_cv_lib_cap_cap_init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -7307,7 +7323,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_cap_cap_init" >&5
 $as_echo "$ac_cv_lib_cap_cap_init" >&6; }
-if test "x$ac_cv_lib_cap_cap_init" = x""yes; then :
+if test "x$ac_cv_lib_cap_cap_init" = xyes; then :
   have_libcap=yes
 else
   have_libcap=no
@@ -7325,7 +7341,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if test "${ac_cv_path_GREP+set}" = set; then :
+if ${ac_cv_path_GREP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -z "$GREP"; then
@@ -7388,7 +7404,7 @@ $as_echo "$ac_cv_path_GREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
-if test "${ac_cv_path_EGREP+set}" = set; then :
+if ${ac_cv_path_EGREP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
@@ -7455,7 +7471,7 @@ $as_echo "$ac_cv_path_EGREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
-if test "${ac_cv_header_stdc+set}" = set; then :
+if ${ac_cv_header_stdc+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -7588,7 +7604,7 @@ done
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of long double" >&5
 $as_echo_n "checking size of long double... " >&6; }
-if test "${ac_cv_sizeof_long_double+set}" = set; then :
+if ${ac_cv_sizeof_long_double+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long double))" "ac_cv_sizeof_long_double"        "$ac_includes_default"; then :
@@ -7704,7 +7720,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIC is default" >&5
 $as_echo_n "checking whether -fPIC is default... " >&6; }
-if test "${libc_cv_pic_default+set}" = set; then :
+if ${libc_cv_pic_default+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   libc_cv_pic_default=yes
@@ -7811,10 +7827,21 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
      :end' >>confcache
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
-    test "x$cache_file" != "x/dev/null" &&
+    if test "x$cache_file" != "x/dev/null"; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
 $as_echo "$as_me: updating cache $cache_file" >&6;}
-    cat confcache >$cache_file
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
   else
     { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
 $as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
@@ -7846,7 +7873,7 @@ LTLIBOBJS=$ac_ltlibobjs
 
 
 
-: ${CONFIG_STATUS=./config.status}
+: "${CONFIG_STATUS=./config.status}"
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
@@ -7947,6 +7974,7 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -8254,7 +8282,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by GNU C Library $as_me (see version.h), which was
-generated by GNU Autoconf 2.66.  Invocation command line was
+generated by GNU Autoconf 2.68.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -8322,7 +8350,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
 GNU C Library config.status (see version.h)
-configured by $0, generated by GNU Autoconf 2.66,
+configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -8342,11 +8370,16 @@ ac_need_defaults=:
 while test $# != 0
 do
   case $1 in
-  --*=*)
+  --*=?*)
     ac_option=`expr "X$1" : 'X\([^=]*\)='`
     ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
     ac_shift=:
     ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
   *)
     ac_option=$1
     ac_optarg=$2
@@ -8368,6 +8401,7 @@ do
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
     ac_need_defaults=false;;
@@ -8471,9 +8505,10 @@ fi
 # after its creation but before its name has been assigned to `$tmp'.
 $debug ||
 {
-  tmp=
+  tmp= ac_tmp=
   trap 'exit_status=$?
-  { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
+  : "${ac_tmp:=$tmp}"
+  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
 ' 0
   trap 'as_fn_exit 1' 1 2 13 15
 }
@@ -8481,12 +8516,13 @@ $debug ||
 
 {
   tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
-  test -n "$tmp" && test -d "$tmp"
+  test -d "$tmp"
 }  ||
 {
   tmp=./conf$$-$RANDOM
   (umask 077 && mkdir "$tmp")
 } || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
@@ -8508,7 +8544,7 @@ else
   ac_cs_awk_cr=$ac_cr
 fi
 
-echo 'BEGIN {' >"$tmp/subs1.awk" &&
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
 _ACEOF
 
 
@@ -8536,7 +8572,7 @@ done
 rm -f conf$$subs.sh
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
-cat >>"\$tmp/subs1.awk" <<\\_ACAWK &&
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
 _ACEOF
 sed -n '
 h
@@ -8584,7 +8620,7 @@ t delim
 rm -f conf$$subs.awk
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACAWK
-cat >>"\$tmp/subs1.awk" <<_ACAWK &&
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
   for (key in S) S_is_set[key] = 1
   FS = ""
 
@@ -8616,7 +8652,7 @@ if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
   sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
 else
   cat
-fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
   || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
 _ACEOF
 
@@ -8650,7 +8686,7 @@ fi # test -n "$CONFIG_FILES"
 # No need to generate them if there are no CONFIG_HEADERS.
 # This happens for instance with `./config.status Makefile'.
 if test -n "$CONFIG_HEADERS"; then
-cat >"$tmp/defines.awk" <<\_ACAWK ||
+cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
 BEGIN {
 _ACEOF
 
@@ -8662,8 +8698,8 @@ _ACEOF
 # handling of long lines.
 ac_delim='%!_!# '
 for ac_last_try in false false :; do
-  ac_t=`sed -n "/$ac_delim/p" confdefs.h`
-  if test -z "$ac_t"; then
+  ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_tt"; then
     break
   elif $ac_last_try; then
     as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
@@ -8783,7 +8819,7 @@ do
     for ac_f
     do
       case $ac_f in
-      -) ac_f="$tmp/stdin";;
+      -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
 	 # because $ac_f cannot contain `:'.
@@ -8818,7 +8854,7 @@ $as_echo "$as_me: creating $ac_file" >&6;}
     esac
 
     case $ac_tag in
-    *:-:* | *:-) cat >"$tmp/stdin" \
+    *:-:* | *:-) cat >"$ac_tmp/stdin" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
     esac
     ;;
@@ -8949,21 +8985,22 @@ s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
 "
-eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk" >$tmp/out \
-  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
-  { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
-  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' "$tmp/out"`; test -z "$ac_out"; } &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
+      "$ac_tmp/out"`; test -z "$ac_out"; } &&
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
 $as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
-  rm -f "$tmp/stdin"
+  rm -f "$ac_tmp/stdin"
   case $ac_file in
-  -) cat "$tmp/out" && rm -f "$tmp/out";;
-  *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
+  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
   esac \
   || as_fn_error $? "could not create $ac_file" "$LINENO" 5
  ;;
@@ -8974,20 +9011,20 @@ which seems to be undefined.  Please make sure it is defined" >&2;}
   if test x"$ac_file" != x-; then
     {
       $as_echo "/* $configure_input  */" \
-      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs"
-    } >"$tmp/config.h" \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
+    } >"$ac_tmp/config.h" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5
-    if diff "$ac_file" "$tmp/config.h" >/dev/null 2>&1; then
+    if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
 $as_echo "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
-      mv "$tmp/config.h" "$ac_file" \
+      mv "$ac_tmp/config.h" "$ac_file" \
 	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
     $as_echo "/* $configure_input  */" \
-      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs" \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
       || as_fn_error $? "could not create -" "$LINENO" 5
   fi
  ;;
diff --git a/configure.in b/configure.in
index fbc64b9..d3f5210 100644
--- a/configure.in
+++ b/configure.in
@@ -293,10 +293,10 @@ if test x$nss_crypt = xyes; then
   fi
   old_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS $nss_includes"
-  AC_COMPILE_IFELSE([typedef int PRBool;
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
 #include <hasht.h>
 #include <nsslowhash.h>
-void f (void) { NSSLOW_Init (); }],
+void f (void) { NSSLOW_Init (); }])],
 	     libc_cv_nss_crypt=yes,
 	     AC_MSG_ERROR([
 cannot find NSS headers with lowlevel hash function interfaces]))