warnings.m4: New file.

config:
	* warnings.m4: New file.
libcpp:
	* configure.ac: Move AC_PROG_MAKE_SET, AC_PROG_INSTALL to
	programs cluster. Use ACX_PROG_CC_WARNING_OPTS,
	ACX_PROG_CC_WARNING_ALMOST_PEDANTIC, ACX_PROG_CC_WARNINGS_ARE_ERRORS.
	* aclocal.m4, configure: Regenerate.
	* init.c: Include localedir.h.
	* Makefile.in (WARN_CFLAGS, ALL_CFLAGS): New variables.
	(DEFS): Delete.
	(.c.o): Use $(ALL_CFLAGS).
	(localedir.h, localedir.hs): New rules.
	(clean): Use rm -rf to remove directories.
	(distclean): Also delete localedir.h and localedir.hs.
	(init.o): Update dependencies.

From-SVN: r88074