Merge from gcc top-level.

./:
	* configure.ac: Add target-libgo to target_libraries.  Set
	and substitute GOC_FOR_BUILD and GOC_FOR_TARGET.
	* Makefile.tpl (BUILD_EXPORTS): Add GOC and GOCFLAGS.
	(HOST_EXPORTS): Add GOC.
	(BASE_TARGET_EXPORTS): Add GOC.
	(GOC_FOR_BUILD, GOCFLAGS, GOC_FOR_TARGET): New variables.
	(GOCFLAGS_FOR_TARGET): New variable.
	(EXTRA_HOST_FLAGS): Add GOC.
	(EXTRA_TARGET_FLAGS): Add GOC and GOCFLAGS.
	* Makefile.def (target_modules): Add libgo.
	(flags_to_pass): Add GOC_FOR_TARGET and GOCFLAGS_FOR_TARGET.
	(dependencies): Add dependency from configure-target-libgo to
	configure-target-libffi and all-target-libstdc++-v3.  Add
	dependencies from all-target-libgo to all-target-libffi.
	(languages): Add go.
	* configure: Rebuild.
	* Makefile.in: Rebuild.

	* config-ml.in: Add Go support: treat GOC and GOCFLAGS like other
	compiler/flag environment variables.

	* configure.ac: Check for lang_requires_boot_languages in
	config-lang.in files.
	* configure: Rebuild.

	PR fortran/32049
	* Makefile.def: Add libquadmath; build it with language=fortran.
	* configure.ac: Add libquadmath.
	* Makefile.tpl: Handle multiple libs in check-[+language+].
	* Makefile.in: Regenerate.
	* configure: Regenerate.

	* configure.ac: Fix spelling in option names.
	* configure: Regenerated.

	PR bootstrap/39622
	* configure.ac (FLAGS_FOR_TARGET): Add include-fixed path.
	* configure: Regenerated.

	* config/cloog.m4: Add -enable-cloog-backend=(isl|ppl|ppl-legacy) to
	define the cloog backend to use. Furthermore, only pass the ppllibs to
	the configure checks, if necessary.
	* configure: Regenerate.

	* config/cloog.m4: Use CLooG predefined macro to check for CLooG PPL.
	* configure: regenerate

	* config/cloog.m4: Fix typo.  verison -> version.
	* configure: Regenerate.

	* config/cloog.m4: Pass ppl libraries to the CLooG version check.
	* configure: Regenerate.

	* configure.ac: Support official CLooG.org versions.
	* configure: Regenerate.
	* config/cloog.m4: New.

	* configure.ac (*-*-darwin*): Use mh-darwin for all Darwin variants.
	* configure: Regenerate.

config/:
	* cloog.m4 (CLOOG_INIT_FLAGS): Fix spelling in option names.

	* bootstrap-lto: Use -flto.

	* mh-darwin: Renamed from mh-ppc-darwin.

config-ml.in

@@ -2,7 +2,7 @@
 # wanting multilib support.
 #
 # Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-# 2005, 2006, 2007  Free Software Foundation, Inc.
+# 2005, 2006, 2007, 2008, 2010  Free Software Foundation, Inc.
 #
 # This file is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -517,6 +517,7 @@ multi-do:
 				prefix="$(prefix)" \
 				exec_prefix="$(exec_prefix)" \
 				GCJFLAGS="$(GCJFLAGS) $${flags}" \
+				GOCFLAGS="$(GOCFLAGS) $${flags}" \
 				CXXFLAGS="$(CXXFLAGS) $${flags}" \
 				LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
 				LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
@@ -750,7 +751,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
         break
       fi
     done
-    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" GCJ="${GCJ_}$flags" GFORTRAN="${GFORTRAN_}$flags"'
+    ml_config_env='CC="${CC_}$flags" CXX="${CXX_}$flags" F77="${F77_}$flags" GCJ="${GCJ_}$flags" GFORTRAN="${GFORTRAN_}$flags" GOC="${GOC_}$flags"'
 
     if [ "${with_target_subdir}" = "." ]; then
 	CC_=$CC' '
@@ -758,6 +759,7 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
 	F77_=$F77' '
 	GCJ_=$GCJ' '
 	GFORTRAN_=$GFORTRAN' '
+	GOC_=$GOC' '
     else
 	# Create a regular expression that matches any string as long
 	# as ML_POPDIR.
@@ -822,6 +824,18 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
 	  esac
 	done
 
+	GOC_=
+	for arg in ${GOC}; do
+	  case $arg in
+	  -[BIL]"${ML_POPDIR}"/*)
+	    GOC_="${GOC_}"`echo "X${arg}" | sed -n "s/X\\(-[BIL]${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X-[BIL]${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+	  "${ML_POPDIR}"/*)
+	    GOC_="${GOC_}"`echo "X${arg}" | sed -n "s/X\\(${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X${popdir_rx}\\(.*\\)/\\1/p"`' ' ;;
+	  *)
+	    GOC_="${GOC_}${arg} " ;;
+	  esac
+	done
+
 	if test "x${LD_LIBRARY_PATH+set}" = xset; then
 	  LD_LIBRARY_PATH_=
 	  for arg in `echo "$LD_LIBRARY_PATH" | tr ':' ' '`; do