Create a config.h file. Check for <sched.h>.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@35696 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 192 insertions, 54 deletions

diff --git a/libobjc/configure b/libobjc/configure
index aa6b8226154..37b646c777b 100755
--- a/libobjc/configure
+++ b/libobjc/configure
@@ -598,7 +598,7 @@ echo "$ac_t""$ac_cv_mingw32" 1>&6
 MINGW32=
 test "$ac_cv_mingw32" = yes && MINGW32=yes
 
-#AC_CONFIG_HEADER(config.h)
+
 
 if test "${srcdir}" = "." ; then
   if test "${with_target_subdir}" != "." ; then
@@ -1214,10 +1214,51 @@ EOF
 fi
 
 
+for ac_hdr in sched.h
+do
+ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
+echo "configure:1222: checking for $ac_hdr" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1227 "configure"
+#include "confdefs.h"
+#include <$ac_hdr>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:1232: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
+if test -z "$ac_err"; then
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=yes"
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_hdr 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
+
 # Determine CFLAGS for gthread.
 
 echo $ac_n "checking for gthread cflags""... $ac_c" 1>&6
-echo "configure:1221: checking for gthread cflags" >&5
+echo "configure:1262: checking for gthread cflags" >&5
 if eval "test \"`echo '$''{'objc_cv_gthread_flags'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1313,7 +1354,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:1317: checking host system type" >&5
+echo "configure:1358: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -1334,7 +1375,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$host" 1>&6
 
 echo $ac_n "checking build system type""... $ac_c" 1>&6
-echo "configure:1338: checking build system type" >&5
+echo "configure:1379: checking build system type" >&5
 
 build_alias=$build
 case "$build_alias" in
@@ -1363,7 +1404,7 @@ ac_prog=ld
 if test "$ac_cv_prog_gcc" = yes; then
   # Check if gcc -print-prog-name=ld gives a path.
   echo $ac_n "checking for ld used by GCC""... $ac_c" 1>&6
-echo "configure:1367: checking for ld used by GCC" >&5
+echo "configure:1408: checking for ld used by GCC" >&5
   case $host in
   *-*-mingw*)
     # gcc leaves a trailing carriage return which upsets mingw
@@ -1393,10 +1434,10 @@ echo "configure:1367: checking for ld used by GCC" >&5
   esac
 elif test "$with_gnu_ld" = yes; then
   echo $ac_n "checking for GNU ld""... $ac_c" 1>&6
-echo "configure:1397: checking for GNU ld" >&5
+echo "configure:1438: checking for GNU ld" >&5
 else
   echo $ac_n "checking for non-GNU ld""... $ac_c" 1>&6
-echo "configure:1400: checking for non-GNU ld" >&5
+echo "configure:1441: checking for non-GNU ld" >&5
 fi
 if eval "test \"`echo '$''{'ac_cv_path_LD'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1431,7 +1472,7 @@ else
 fi
 test -z "$LD" && { echo "configure: error: no acceptable ld found in \$PATH" 1>&2; exit 1; }
 echo $ac_n "checking if the linker ($LD) is GNU ld""... $ac_c" 1>&6
-echo "configure:1435: checking if the linker ($LD) is GNU ld" >&5
+echo "configure:1476: checking if the linker ($LD) is GNU ld" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gnu_ld'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1448,7 +1489,7 @@ with_gnu_ld=$ac_cv_prog_gnu_ld
 
 
 echo $ac_n "checking for $LD option to reload object files""... $ac_c" 1>&6
-echo "configure:1452: checking for $LD option to reload object files" >&5
+echo "configure:1493: checking for $LD option to reload object files" >&5
 if eval "test \"`echo '$''{'lt_cv_ld_reload_flag'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1460,7 +1501,7 @@ reload_flag=$lt_cv_ld_reload_flag
 test -n "$reload_flag" && reload_flag=" $reload_flag"
 
 echo $ac_n "checking for BSD-compatible nm""... $ac_c" 1>&6
-echo "configure:1464: checking for BSD-compatible nm" >&5
+echo "configure:1505: checking for BSD-compatible nm" >&5
 if eval "test \"`echo '$''{'ac_cv_path_NM'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1497,7 +1538,7 @@ NM="$ac_cv_path_NM"
 echo "$ac_t""$NM" 1>&6
 
 echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:1501: checking whether ln -s works" >&5
+echo "configure:1542: checking whether ln -s works" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_LN_S'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1518,7 +1559,7 @@ else
 fi
 
 echo $ac_n "checking how to recognise dependant libraries""... $ac_c" 1>&6
-echo "configure:1522: checking how to recognise dependant libraries" >&5
+echo "configure:1563: checking how to recognise dependant libraries" >&5
 if eval "test \"`echo '$''{'lt_cv_deplibs_check_method'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1659,13 +1700,13 @@ file_magic_cmd=$lt_cv_file_magic_cmd
 deplibs_check_method=$lt_cv_deplibs_check_method
 
 echo $ac_n "checking for object suffix""... $ac_c" 1>&6
-echo "configure:1663: checking for object suffix" >&5
+echo "configure:1704: checking for object suffix" >&5
 if eval "test \"`echo '$''{'ac_cv_objext'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   rm -f conftest*
 echo 'int i = 1;' > conftest.$ac_ext
-if { (eval echo configure:1669: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1710: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   for ac_file in conftest.*; do
     case $ac_file in
     *.c) ;;
@@ -1685,7 +1726,7 @@ ac_objext=$ac_cv_objext
 
 
 echo $ac_n "checking for executable suffix""... $ac_c" 1>&6
-echo "configure:1689: checking for executable suffix" >&5
+echo "configure:1730: checking for executable suffix" >&5
 if eval "test \"`echo '$''{'ac_cv_exeext'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1695,7 +1736,7 @@ else
   rm -f conftest*
   echo 'int main () { return 0; }' > conftest.$ac_ext
   ac_cv_exeext=
-  if { (eval echo configure:1699: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+  if { (eval echo configure:1740: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
     for file in conftest.*; do
       case $file in
       *.c | *.o | *.obj) ;;
@@ -1728,7 +1769,7 @@ case "$deplibs_check_method" in
 file_magic*)
   if test "$file_magic_cmd" = '${MAGIC}'; then
     echo $ac_n "checking for ${ac_tool_prefix}file""... $ac_c" 1>&6
-echo "configure:1732: checking for ${ac_tool_prefix}file" >&5
+echo "configure:1773: checking for ${ac_tool_prefix}file" >&5
 if eval "test \"`echo '$''{'lt_cv_path_MAGIC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1790,7 +1831,7 @@ fi
 if test -z "$lt_cv_path_MAGIC"; then
   if test -n "$ac_tool_prefix"; then
     echo $ac_n "checking for file""... $ac_c" 1>&6
-echo "configure:1794: checking for file" >&5
+echo "configure:1835: checking for file" >&5
 if eval "test \"`echo '$''{'lt_cv_path_MAGIC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1861,7 +1902,7 @@ esac
 # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1865: checking for $ac_word" >&5
+echo "configure:1906: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1893,7 +1934,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1897: checking for $ac_word" >&5
+echo "configure:1938: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1928,7 +1969,7 @@ fi
 # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1932: checking for $ac_word" >&5
+echo "configure:1973: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_STRIP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1960,7 +2001,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1964: checking for $ac_word" >&5
+echo "configure:2005: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_STRIP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2027,8 +2068,8 @@ test x"$pic_mode" = xno && libtool_flags="$libtool_flags --prefer-non-pic"
 case "$host" in
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 2031 "configure"' > conftest.$ac_ext
-  if { (eval echo configure:2032: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  echo '#line 2072 "configure"' > conftest.$ac_ext
+  if { (eval echo configure:2073: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
     case "`/usr/bin/file conftest.o`" in
     *32-bit*)
       LD="${LD-ld} -32"
@@ -2049,7 +2090,7 @@ case "$host" in
   SAVE_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS -belf"
   echo $ac_n "checking whether the C compiler needs -belf""... $ac_c" 1>&6
-echo "configure:2053: checking whether the C compiler needs -belf" >&5
+echo "configure:2094: checking whether the C compiler needs -belf" >&5
 if eval "test \"`echo '$''{'lt_cv_cc_needs_belf'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2062,14 +2103,14 @@ ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$a
 cross_compiling=$ac_cv_prog_cc_cross
 
      cat > conftest.$ac_ext <<EOF
-#line 2066 "configure"
+#line 2107 "configure"
 #include "confdefs.h"
 
 int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:2073: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2114: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   lt_cv_cc_needs_belf=yes
 else
@@ -2099,7 +2140,7 @@ echo "$ac_t""$lt_cv_cc_needs_belf" 1>&6
   # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dlltool; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2103: checking for $ac_word" >&5
+echo "configure:2144: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_DLLTOOL'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2131,7 +2172,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "dlltool", so it can be a program name with args.
 set dummy dlltool; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2135: checking for $ac_word" >&5
+echo "configure:2176: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_DLLTOOL'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2166,7 +2207,7 @@ fi
   # Extract the first word of "${ac_tool_prefix}as", so it can be a program name with args.
 set dummy ${ac_tool_prefix}as; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2170: checking for $ac_word" >&5
+echo "configure:2211: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AS'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2198,7 +2239,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "as", so it can be a program name with args.
 set dummy as; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2202: checking for $ac_word" >&5
+echo "configure:2243: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AS'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2233,7 +2274,7 @@ fi
   # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
 set dummy ${ac_tool_prefix}objdump; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2237: checking for $ac_word" >&5
+echo "configure:2278: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_OBJDUMP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2265,7 +2306,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "objdump", so it can be a program name with args.
 set dummy objdump; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2269: checking for $ac_word" >&5
+echo "configure:2310: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_OBJDUMP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2301,12 +2342,12 @@ fi
   # recent cygwin and mingw systems supply a stub DllMain which the user
   # can override, but on older systems we have to supply one
   echo $ac_n "checking if libtool should supply DllMain function""... $ac_c" 1>&6
-echo "configure:2305: checking if libtool should supply DllMain function" >&5
+echo "configure:2346: checking if libtool should supply DllMain function" >&5
 if eval "test \"`echo '$''{'lt_cv_need_dllmain'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2310 "configure"
+#line 2351 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -2314,7 +2355,7 @@ extern int __attribute__((__stdcall__)) DllMain(void*, int, void*);
       DllMain (0, 0, 0);
 ; return 0; }
 EOF
-if { (eval echo configure:2318: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2359: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   lt_cv_need_dllmain=no
 else
@@ -2335,19 +2376,19 @@ echo "$ac_t""$lt_cv_need_dllmain" 1>&6
     SAVE_CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -mdll"
     echo $ac_n "checking how to link DLLs""... $ac_c" 1>&6
-echo "configure:2339: checking how to link DLLs" >&5
+echo "configure:2380: checking how to link DLLs" >&5
 if eval "test \"`echo '$''{'lt_cv_cc_dll_switch'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2344 "configure"
+#line 2385 "configure"
 #include "confdefs.h"
 
 int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:2351: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2392: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   lt_cv_cc_dll_switch=-mdll
 else
@@ -2536,19 +2577,7 @@ fi
 
 trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15
 
-# Transform confdefs.h into DEFS.
-# Protect against shell expansion while executing Makefile rules.
-# Protect against Makefile macro expansion.
-cat > conftest.defs <<\EOF
-s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%-D\1=\2%g
-s%[ 	`~#$^&*(){}\\|;'"<>?]%\\&%g
-s%\[%\\&%g
-s%\]%\\&%g
-s%\$%$$%g
-EOF
-DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' '`
-rm -f conftest.defs
-
+DEFS=-DHAVE_CONFIG_H
 
 # Without the "./", some shells look in PATH for config.status.
 : ${CONFIG_STATUS=./config.status}
@@ -2586,7 +2615,7 @@ done
 ac_given_srcdir=$srcdir
 ac_given_INSTALL="$INSTALL"
 
-trap 'rm -fr `echo "Makefile" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15
+trap 'rm -fr `echo "Makefile config.h" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15
 EOF
 cat >> $CONFIG_STATUS <<EOF
 
@@ -2745,6 +2774,113 @@ s%@INSTALL@%$INSTALL%g
 fi; done
 rm -f conftest.s*
 
+# These sed commands are passed to sed as "A NAME B NAME C VALUE D", where
+# NAME is the cpp macro being defined and VALUE is the value it is being given.
+#
+# ac_d sets the value in "#define NAME VALUE" lines.
+ac_dA='s%^\([ 	]*\)#\([ 	]*define[ 	][ 	]*\)'
+ac_dB='\([ 	][ 	]*\)[^ 	]*%\1#\2'
+ac_dC='\3'
+ac_dD='%g'
+# ac_u turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
+ac_uA='s%^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_uB='\([ 	]\)%\1#\2define\3'
+ac_uC=' '
+ac_uD='\4%g'
+# ac_e turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
+ac_eA='s%^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_eB='$%\1#\2define\3'
+ac_eC=' '
+ac_eD='%g'
+
+if test "${CONFIG_HEADERS+set}" != set; then
+EOF
+cat >> $CONFIG_STATUS <<EOF
+  CONFIG_HEADERS="config.h"
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+fi
+for ac_file in .. $CONFIG_HEADERS; do if test "x$ac_file" != x..; then
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case "$ac_file" in
+  *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+       ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+  *) ac_file_in="${ac_file}.in" ;;
+  esac
+
+  echo creating $ac_file
+
+  rm -f conftest.frag conftest.in conftest.out
+  ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+  cat $ac_file_inputs > conftest.in
+
+EOF
+
+# Transform confdefs.h into a sed script conftest.vals that substitutes
+# the proper values into config.h.in to produce config.h.  And first:
+# Protect against being on the right side of a sed subst in config.status.
+# Protect against being in an unquoted here document in config.status.
+rm -f conftest.vals
+cat > conftest.hdr <<\EOF
+s/[\\&%]/\\&/g
+s%[\\$`]%\\&%g
+s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%${ac_dA}\1${ac_dB}\1${ac_dC}\2${ac_dD}%gp
+s%ac_d%ac_u%gp
+s%ac_u%ac_e%gp
+EOF
+sed -n -f conftest.hdr confdefs.h > conftest.vals
+rm -f conftest.hdr
+
+# This sed command replaces #undef with comments.  This is necessary, for
+# example, in the case of _POSIX_SOURCE, which is predefined and required
+# on some systems where configure will not decide to define it.
+cat >> conftest.vals <<\EOF
+s%^[ 	]*#[ 	]*undef[ 	][ 	]*[a-zA-Z_][a-zA-Z_0-9]*%/* & */%
+EOF
+
+# Break up conftest.vals because some shells have a limit on
+# the size of here documents, and old seds have small limits too.
+
+rm -f conftest.tail
+while :
+do
+  ac_lines=`grep -c . conftest.vals`
+  # grep -c gives empty output for an empty file on some AIX systems.
+  if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
+  # Write a limited-size here document to conftest.frag.
+  echo '  cat > conftest.frag <<CEOF' >> $CONFIG_STATUS
+  sed ${ac_max_here_lines}q conftest.vals >> $CONFIG_STATUS
+  echo 'CEOF
+  sed -f conftest.frag conftest.in > conftest.out
+  rm -f conftest.in
+  mv conftest.out conftest.in
+' >> $CONFIG_STATUS
+  sed 1,${ac_max_here_lines}d conftest.vals > conftest.tail
+  rm -f conftest.vals
+  mv conftest.tail conftest.vals
+done
+rm -f conftest.vals
+
+cat >> $CONFIG_STATUS <<\EOF
+  rm -f conftest.frag conftest.h
+  echo "/* $ac_file.  Generated automatically by configure.  */" > conftest.h
+  cat conftest.in >> conftest.h
+  rm -f conftest.in
+  if cmp -s $ac_file conftest.h 2>/dev/null; then
+    echo "$ac_file is unchanged"
+    rm -f conftest.h
+  else
+    # Remove last slash and all that follows it.  Not all systems have dirname.
+      ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+      if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+      # The file is in a subdirectory.
+      test ! -d "$ac_dir" && mkdir "$ac_dir"
+    fi
+    rm -f $ac_file
+    mv conftest.h $ac_file
+  fi
+fi; done
+
 EOF
 cat >> $CONFIG_STATUS <<EOF
 srcdir=${srcdir}
diff --git a/libobjc/configure.in b/libobjc/configure.in
index 3fb507d6fcf..9183e52bf05 100644
--- a/libobjc/configure.in
+++ b/libobjc/configure.in
@@ -21,7 +21,7 @@
 
 AC_PREREQ(2.13)
 AC_INIT(objc/objc.h)
-#AC_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADER(config.h)
 
 if test "${srcdir}" = "." ; then
   if test "${with_target_subdir}" != "." ; then
@@ -91,6 +91,8 @@ the Objective C runtime system.  If necessary, install gcc now with
 
 AC_HEADER_STDC
 
+AC_CHECK_HEADERS(sched.h)
+
 # Determine CFLAGS for gthread.
 
 AC_CACHE_CHECK([for gthread cflags],objc_cv_gthread_flags,