re PR preprocessor/60975 (-Wvariadic-macros does not print warning)

re PR preprocessor/60975 (-Wvariadic-macros does not print warning)

gcc/ChangeLog:

2014-08-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c/60975
	PR c/53063
	* doc/options.texi (CPP): Document it.
	* doc/invoke.texi (Wvariadic-macros): Fix documentation.
	* optc-gen.awk: Handle CPP.
	* opth-gen.awk: Likewise.

gcc/c-family/ChangeLog:

2014-08-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c/60975
	PR c/53063
	* c.opt (Wvariadic-macros): Use CPP and LangEnabledBy.
	* c-opts.c (c_common_handle_option): Call cpp_handle_option_auto.
	(c_common_post_options): Call init_global_opts_from_cpp.
	(sanitize_cpp_opts): Do not handle Wvariadic-macros here.

gcc/testsuite/ChangeLog:

2014-08-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c/60975
	PR c/53063
	* gcc.dg/cpp/Wvariadic-1p.c: New test.

From-SVN: r214200