confsubdir.m4: Move here from newlib.

2007-05-27  Paolo Bonzini  <bonzini@gnu.org>

	* confsubdir.m4: Move here from newlib.

From-SVN: r125124

config/ChangeLog

+2007-05-27  Paolo Bonzini  <bonzini@gnu.org>
+
+	* confsubdir.m4: Move here from newlib.
+
 2007-05-23  Paolo Bonzini  <bonzini@gnu.org>
 
 	PR bootstrap/32009

config/confsubdir.m4

+dnl Fix Autoconf-2.59 AC_CONFIG_SUBDIRS whitespace mangling,
+dnl by overriding the broken internal Autoconf macro with a
+dnl backport of the 2.60 fix.
+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 Redefine AC_CONFIG_SUBDIRS so this file is picked up if needed.
+AC_DEFUN([AC_CONFIG_SUBDIRS], defn([AC_CONFIG_SUBDIRS]))
+
+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
+])])