Hi.
One more patch I've just tested.
Martin
>From eb62ef9ec1edc109aa69137ed077620cafad5253 Mon Sep 17 00:00:00 2001
From: Martin Liska <mli...@suse.cz>
Date: Mon, 22 Jul 2019 10:00:07 +0200
Subject: [PATCH] Backport r273660
gcc/ChangeLog:
2019-07-22 Martin Liska <mli...@suse.cz>
PR driver/91172
* opts-common.c (decode_cmdline_option): Decode
argument of -Werror and check it for a wrong language.
* opts-global.c (complain_wrong_lang): Remove such case.
gcc/testsuite/ChangeLog:
2019-07-22 Martin Liska <mli...@suse.cz>
PR driver/91172
* gcc.dg/pr91172.c: New test.
---
gcc/opts-common.c | 20 +++++++++++++++++++-
gcc/opts-global.c | 6 +++++-
2 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/gcc/opts-common.c b/gcc/opts-common.c
index 3c2553368ac..9b0d76d1148 100644
--- a/gcc/opts-common.c
+++ b/gcc/opts-common.c
@@ -438,7 +438,8 @@ decode_cmdline_option (const char **argv, unsigned int lang_mask,
extra_args = 0;
- opt_index = find_opt (argv[0] + 1, lang_mask);
+ const char *opt_value = argv[0] + 1;
+ opt_index = find_opt (opt_value, lang_mask);
i = 0;
while (opt_index == OPT_SPECIAL_unknown
&& i < ARRAY_SIZE (option_map))
@@ -641,6 +642,23 @@ decode_cmdline_option (const char **argv, unsigned int lang_mask,
/* Check if this is a switch for a different front end. */
if (!option_ok_for_language (option, lang_mask))
errors |= CL_ERR_WRONG_LANG;
+ else if (strcmp (option->opt_text, "-Werror=") == 0
+ && strchr (opt_value, ',') == NULL)
+ {
+ /* Verify that -Werror argument is a valid warning
+ for a language. */
+ char *werror_arg = xstrdup (opt_value + 6);
+ werror_arg[0] = 'W';
+
+ size_t warning_index = find_opt (werror_arg, lang_mask);
+ if (warning_index != OPT_SPECIAL_unknown)
+ {
+ const struct cl_option *warning_option
+ = &cl_options[warning_index];
+ if (!option_ok_for_language (warning_option, lang_mask))
+ errors |= CL_ERR_WRONG_LANG;
+ }
+ }
/* Convert the argument to lowercase if appropriate. */
if (arg && option->cl_tolower)
diff --git a/gcc/opts-global.c b/gcc/opts-global.c
index bfa2afb1987..b45d18996a3 100644
--- a/gcc/opts-global.c
+++ b/gcc/opts-global.c
@@ -100,10 +100,14 @@ complain_wrong_lang (const struct cl_decoded_option *decoded,
text, bad_lang);
else if (lang_mask == CL_DRIVER)
gcc_unreachable ();
- else
+ else if (ok_langs[0] != '\0')
/* Eventually this should become a hard error IMO. */
warning (0, "command line option %qs is valid for %s but not for %s",
text, ok_langs, bad_lang);
+ else
+ /* Happens for -Werror=warning_name. */
+ warning (0, "%<-Werror=%> argument %qs is not valid for %s",
+ text, bad_lang);
free (ok_langs);
free (bad_lang);
--
2.22.0
