* toplev.c (lang_options): Add -Wlong-long, -Wno-long-long
	options.
	* c-decl.c (warn_long_long): Define.
	(c_decode_option): Parse -Wlong-long, -Wno-long-long options.
	(grokdeclarator): Add flag `warn_long_long' as guard for
	warning "ANSI C does not support `long long'".
	* invoke.texi: Add description of options -Wlong-long,
	-Wno-long-long.
	* gcc.1: The same as above.
	* cp-tree.h (warn_long_long): Define.
	* decl.c (grokdeclarator): Add flag `warn_long_long' as guard for
	warning "ANSI C++ does not support `long long'".
	* decl2.c (warn_long_long): Define.
	(lang_decode_option): Parse -Wlong-long, -Wno-long-long options.

From-SVN: r21007