Merge from gcc:

	Merge from gcc:

	2011-07-26  Ian Lance Taylor  <iant@google.com>
	* configure.ac: Set have_compiler based on whether gcc directory
	exists, rather than on whether gcc is in configdirs.
	* configure: Rebuild.

	2011-07-20  David Edelsohn  <dje.gcc@gmail.com>
	* Makefile.tpl (POSTSTAGE1_CONFIGURE_FLAGS): Add libsupc++ to
	link directories.
	* Makefile.in: Rebuild.

	2011-07-20  Ian Lance Taylor  <iant@google.com>
	PR bootstrap/49787
	* configure.ac: Move --enable-bootstrap handling earlier in file.
	If --enable-bootstrap and either --enable-build-with-cxx or
	--enable-build-poststage1-with-cxx, enable C++ automatically.
	* configure: Rebuild.

	2011-07-19  Ian Lance Taylor  <iant@google.com>
	* configure.ac: Add --enable-build-poststage1-with-cxx.  If set,
	make C++ a boot_language.  Set and substitute
	POSTSTAGE1_CONFIGURE_FLAGS.
	* Makefile.tpl (POSTSTAGE1_CONFIGURE_FLAGS): New variable.
	(STAGE[+id+]_CONFIGURE_FLAGS): Add $(POSTSTAGE1_CONFIGURE_FLAGS).
	* configure, Makefile.in: Rebuild.

	2011-07-16  Jason Merrill  <jason@redhat.com>
	* Makefile.def (language=c++): Add check-c++0x and
	check-target-libmudflap-c++.
	* Makefile.tpl (check-target-libmudflap-c++): New.
	* Makefile.in: Regenerate.

	2011-07-16  Matthias Klose  <doko@ubuntu.com>
	* Makefile.tpl (EXTRA_CONFIGARGS_LIBJAVA): Define.
	* Makefile.def (target_modules/libjava): Pass
	$(EXTRA_CONFIGARGS_LIBJAVA).
	* configure.ac: Pass --disable-static in EXTRA_CONFIGARGS_LIBJAVA,
	if not configured with --enable-static-libjava.
	* Makefile.in: Regenerate.
	* configure: Likewise.

	2011-06-22  Hans-Peter Nilsson  <hp@axis.com>
	PR regression/47836
	PR bootstrap/23656
	PR other/47733
	PR bootstrap/49247
	PR c/48825
	* configure.ac (target_libraries): Remove target-libiberty.
	Remove case-statement setting skipdirs=target-libiberty for
	multiple targets.  Remove checking target_configdirs and
	removing target-libiberty but keeping target-libgcc if
	otherwise empty.
	* Makefile.def (target_modules): Don't add libiberty.
	(dependencies): Remove all traces of target-libiberty.
	* configure, Makefile.in: Regenerate.