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macro.c (warn_of_redefinition): Suppress warnings for builtins that lack the NODE_WARN flag...

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libcpp/ChangeLog:

2014-08-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* macro.c (warn_of_redefinition): Suppress warnings for builtins
	that lack the NODE_WARN flag, unless Wbuiltin-macro-redefined.
	(_cpp_create_definition): Use Wbuiltin-macro-redefined for
	builtins that lack the NODE_WARN flag.
	* directives.c (do_undef): Likewise.
	* init.c (cpp_init_special_builtins): Do not change flags
	depending on Wbuiltin-macro-redefined.


gcc/c-family/ChangeLog:

2014-08-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* c.opt (Wbuiltin-macro-redefined): Use CPP, Var and Init.
	* c-opts.c (c_common_handle_option): Do not handle here.

From-SVN: r214730
This commit is contained in:
Manuel López-Ibáñez 2014-08-29 15:28:45 +00:00
parent ef0981b8ae
commit b753b37bd6
7 changed files with 34 additions and 20 deletions
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5
libcpp/directives.c
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@ -610,6 +610,11 @@ do_undef (cpp_reader *pfile)
if (node->flags & NODE_WARN)
cpp_error (pfile, CPP_DL_WARNING,
"undefining \"%s\"", NODE_NAME (node));
else if ((node->flags & NODE_BUILTIN)
&& CPP_OPTION (pfile, warn_builtin_macro_redefined))
cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED,
pfile->directive_line, 0,
"undefining \"%s\"", NODE_NAME (node));
if (CPP_OPTION (pfile, warn_unused_macros))
_cpp_warn_if_unused_macro (pfile, node, NULL);