* Makefile.in (aclocal_deps): New variable.
	($(srcdir)/aclocal.m4): Use it, for portable makefile syntax.

libdecnumber/
	* Makefile.in (aclocal_deps): New variable.
	($(srcdir)/aclocal.m4): Use it, for portable makefile syntax.

etc/
	* Makefile.in (AUTOCONF, configure_deps): New variables.
	($(srcdir)/configure, config.status): New rules.
	(Makefile): Depend on config.status.
	* configure.in: Accept --enable-maintainer-mode, set and
	substitute MAINT accordingly.

gdb/
	* Makefile.in (ACLOCAL, ACLOCAL_AMFLAGS, aclocal_m4_deps)
	(AUTOCONF, configure_deps, AUTOHEADER): New variables.
	($(srcdir)/aclocal.m4, $(srcdir)/configure, $(srcdir)/config.in)
	(am--refresh): New rules.
	(stamp-h, config.status): List config.in and configure including
	$(srcdir)/ prefix.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.