* cppmacro.c (check_trad_stringification): New function.

	(save_expansion): If -Wtraditional, warn about stringification of
	macro arguments.

testsuite:
	* gcc.dg/cpp/tr-warn6.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36285 138bc75d-0d04-0410-961f-82ee72b054a4