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	* Makefile.in: Regenerate.
	* configure: Regenerate.

config/
	* override.m4: Use m4_version_prereq throughout.
	(_AC_ARG_VAR_VALIDATE, AC_MSG_FAILURE): Backport from git
	Autoconf: output pwd along with fatal errors, so the right
	config.log file is hinted at more prominently.
	(PARSE_ARGS): Push setting of ac_pwd in this diversion.
	(_GCC_AUTOCONF_VERSION): New, define to 2.59 if not defined.
	(_GCC_AUTOCONF_VERSION_CHECK): New macro, require use of Autoconf
	version _GCC_AUTOCONF_VERSION throughout the tree.
	(m4_wrap): New override, fix for Posix semantics of m4wrap.

libgcc/
	* configure.ac: sinclude override.m4.
	* configure: Regenerate.

gnattools/
	* configure.ac: move sinclude of acx.m4 before AC_INIT,
	also sinclude override.m4.
	* Makefile.in ($(srcdir)/configure): Update dependencies.
	* configure: Regenerate.

libada/
	* configure.ac: move sinclude of acx.m4 before AC_INIT,
	also sinclude override.m4.
	* Makefile.in ($(srcdir)/config...