2008-04-18 Paolo Bonzini <bonzini@gnu.org>

	Sync with gcc:
	2008-04-18  Paolo Bonzini  <bonzini@gnu.org>

	PR bootstrap/35457
	* configure.ac: Include override.m4.
	* configure: Regenerate.

	2008-04-18  Paolo Bonzini  <bonzini@gnu.org>

        * Makefile.tpl (restrap): Call `make all' using double-colon rules.
        * Makefile.in: Regenerate.

	2008-04-11  Eric B. Weddington  <eweddington@cso.atmel.com>

        * configure.ac: Do not build libssp for the AVR.
        * configure: Regenerate.

config:
2008-04-18  Paolo Bonzini  <bonzini@gnu.org>

	PR bootstrap/35457

	* override.m4: Add this.  Make sure aclocal always picks it.
	Add more lenient precious variable check, backported from
	autoconf trunk.

2 files changed, 202 insertions, 0 deletions

diff --git a/config/ChangeLog b/config/ChangeLog
index 3556e08b59..ff7f8ba4c3 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,16 @@
+2008-04-18  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR bootstrap/35457
+
+	* override.m4: Add this.  Make sure aclocal always picks it.
+	Add more lenient precious variable check, backported from
+	autoconf trunk.
+
+	(note: I left confsubdir.m4 for the moment until all the
+	configure scripts are regenerated.  When confsubdir.m4 is
+	removed, this note should be removed too and config/ChangeLog
+	should be synced with gcc's).
+
 2008-04-04  Nick Clifton  <nickc@redhat.com>
 
 	PR binutils/4334
diff --git a/config/override.m4 b/config/override.m4
new file mode 100644
index 0000000000..4838a7da95
--- /dev/null
+++ b/config/override.m4
@@ -0,0 +1,189 @@
+dnl Fix Autoconf-2.59 bugs: by overriding broken internal
+dnl Autoconf macros with backports of the 2.60+ fix.
+dnl - AC_CONFIG_SUBDIRS whitespace mangling,
+dnl - more lenient precious variable checks
+dnl
+dnl This file should be a no-op for Autoconf versions != 2.59.
+dnl It can be removed once the complete tree has moved to a
+dnl newer Autoconf version.
+
+dnl m4_PACKAGE_VERSION is an undocumented Autoconf macro.
+dnl We use it because this fix is intended for 2.59 only.
+dnl A feature test for the broken AC_CONFIG_SUBDIRS instead
+dnl would be better but is tricky.
+dnl
+dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13.
+dnl Redefine AC_CONFIG_SUBDIRS so aclocal pulls in this file
+dnl when needed.
+
+ifdef([m4_PACKAGE_VERSION],
+[ifelse(m4_PACKAGE_VERSION, [2.59], [
+
+dnl AC_DEFUN a commonly used macro so this file is picked up.
+m4_copy([AC_PREREQ], [_AC_PREREQ])
+AC_DEFUN([AC_PREREQ], [frob])
+m4_copy([_AC_PREREQ], [AC_PREREQ])
+
+dnl Override the broken macro.
+# _AC_OUTPUT_SUBDIRS
+# ------------------
+# This is a subroutine of AC_OUTPUT, but it does not go into
+# config.status, rather, it is called after running config.status.
+m4_define([_AC_OUTPUT_SUBDIRS],
+[
+#
+# CONFIG_SUBDIRS section, as fixed in confsubdir.m4.
+#
+if test "$no_recursion" != yes; then
+
+  # Remove --cache-file and --srcdir arguments so they do not pile up.
+  ac_sub_configure_args=
+  ac_prev=
+  eval "set x $ac_configure_args"
+  shift
+  for ac_arg
+  do
+    if test -n "$ac_prev"; then
+      ac_prev=
+      continue
+    fi
+    case $ac_arg in
+    -cache-file | --cache-file | --cache-fil | --cache-fi \
+    | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+      ac_prev=cache_file ;;
+    -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+    | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* \
+    | --c=*)
+      ;;
+    --config-cache | -C)
+      ;;
+    -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+      ac_prev=srcdir ;;
+    -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+      ;;
+    -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+      ac_prev=prefix ;;
+    -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+      ;;
+    *)
+      case $ac_arg in
+      *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+      esac
+      ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
+    esac
+  done
+
+  # Always prepend --prefix to ensure using the same prefix
+  # in subdir configurations.
+  ac_arg="--prefix=$prefix"
+  case $ac_arg in
+  *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+  esac
+  ac_sub_configure_args="$ac_arg $ac_sub_configure_args"
+
+  ac_popdir=`pwd`
+  for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue
+
+    # Do not complain, so a configure script can configure whichever
+    # parts of a large source tree are present.
+    test -d "$srcdir/$ac_dir" || continue
+
+    AC_MSG_NOTICE([configuring in $ac_dir])
+    AS_MKDIR_P(["$ac_dir"])
+    _AC_SRCPATHS(["$ac_dir"])
+
+    cd "$ac_dir"
+
+    # Check for guested configure; otherwise get Cygnus style configure.
+    if test -f "$ac_srcdir/configure.gnu"; then
+      ac_sub_configure=$ac_srcdir/configure.gnu
+    elif test -f "$ac_srcdir/configure"; then
+      ac_sub_configure=$ac_srcdir/configure
+    elif test -f "$ac_srcdir/configure.in"; then
+      # This should be Cygnus configure.
+      ac_sub_configure=$ac_aux_dir/configure
+    else
+      AC_MSG_WARN([no configuration information is in $ac_dir])
+      ac_sub_configure=
+    fi
+
+    # The recursion is here.
+    if test -n "$ac_sub_configure"; then
+      # Make the cache file name correct relative to the subdirectory.
+      case $cache_file in
+      [[\\/]]* | ?:[[\\/]]* ) ac_sub_cache_file=$cache_file ;;
+      *) # Relative path.
+	ac_sub_cache_file=$ac_top_builddir$cache_file ;;
+      esac
+
+      AC_MSG_NOTICE([running $SHELL $ac_sub_configure $ac_sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir])
+      # The eval makes quoting arguments work.
+      eval "\$SHELL \"\$ac_sub_configure\" $ac_sub_configure_args \
+	   --cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" ||
+	AC_MSG_ERROR([$ac_sub_configure failed for $ac_dir])
+    fi
+
+    cd "$ac_popdir"
+  done
+fi
+])# _AC_OUTPUT_SUBDIRS
+
+# _AC_ARG_VAR_VALIDATE
+# --------------------
+# The code is the same as autoconf 2.59, but with a more lenient check
+# on precious variables that has been added in autoconf 2.62.
+m4_define([_AC_ARG_VAR_VALIDATE],
+[# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in `(set) 2>&1 |
+	       sed -n 's/^ac_env_\([[a-zA-Z_0-9]]*\)_set=.*/\1/p'`; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val="\$ac_cv_env_${ac_var}_value"
+  eval ac_new_val="\$ac_env_${ac_var}_value"
+  case $ac_old_set,$ac_new_set in
+    set,)
+      AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous run], 2)
+      ac_cache_corrupted=: ;;
+    ,set)
+      AS_MESSAGE([error: `$ac_var' was not set in the previous run], 2)
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+        # differences in whitespace do not lead to failure.
+        ac_old_val_w=`echo x $ac_old_val`
+        ac_new_val_w=`echo x $ac_new_val`
+        if test "$ac_old_val_w" != "$ac_new_val_w"; then
+          AS_MESSAGE([error: `$ac_var' has changed since the previous run:], 2)
+          ac_cache_corrupted=:
+        else
+          AS_MESSAGE([warning: ignoring whitespace changes in `$ac_var' since the previous run:], 2)
+          eval $ac_var=\$ac_old_val
+        fi
+        AS_MESSAGE([  former value:  `$ac_old_val'], 2)
+        AS_MESSAGE([  current value: `$ac_new_val'], 2)
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+dnl If you change this globbing pattern, test it on an old shell --
+dnl it's sensitive.  Putting any kind of quote in it causes syntax errors.
+[    *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)]
+      ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  AS_MESSAGE([error: changes in the environment can compromise the build], 2)
+  AS_ERROR([run `make distclean' and/or `rm $cache_file' and start over])
+fi
+])# _AC_ARG_VAR_VALIDATE
+])])