From eb62ef9ec1edc109aa69137ed077620cafad5253 Mon Sep 17 00:00:00 2001 From: Martin Liska Date: Mon, 22 Jul 2019 10:00:07 +0200 Subject: [PATCH] Backport r273660 gcc/ChangeLog: 2019-07-22 Martin Liska 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 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