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c/86134 avoid errors for unrecognized -Wno- options

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This makes sure to not promote diagnostics about unrecognized -Wno-
options to errors and make the intent of the diagnostic clearer.

2020-02-17  Richard Biener  <rguenther@suse.de>

	PR c/86134
	* opts-global.c (print_ignored_options): Use inform and
	amend message.

	* gcc.dg/pr86134.c: New testcase.
	* gcc.dg/pr28322-2.c: Adjust.
This commit is contained in:
Richard Biener 2020-02-17 09:32:44 +01:00
parent f76a88ebf0
commit abe13e1847
5 changed files with 23 additions and 3 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2020-02-17 Richard Biener <rguenther@suse.de>
PR c/86134
* opts-global.c (print_ignored_options): Use inform and
amend message.
2020-02-17 Jiufu Guo <guojiufu@linux.ibm.com>
PR target/93047

6
gcc/opts-global.c
View File

@ -139,8 +139,10 @@ print_ignored_options (void)
const char *opt;
opt = ignored_options.pop ();
warning_at (UNKNOWN_LOCATION, 0,
"unrecognized command-line option %qs", opt);
/* Use inform, not warning_at, to avoid promoting these to errors. */
inform (UNKNOWN_LOCATION,
"unrecognized command-line option %qs may have been intended "
"to silence earlier diagnostics", opt);
}
}

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2020-02-17 Richard Biener <rguenther@suse.de>
PR c/86134
* gcc.dg/pr86134.c: New testcase.
* gcc.dg/pr28322-2.c: Adjust.
2020-02-17 David Malcolm <dmalcolm@redhat.com>
PR analyzer/93388

2
gcc/testsuite/gcc.dg/pr28322-2.c
View File

@ -8,5 +8,5 @@ int foo (void)
return i;
}
/* { dg-warning "unrecognized command-line option .-Wno-foobar." "" { target *-*-* } 0 } */
/* { dg-message "unrecognized command-line option .-Wno-foobar." "" { target *-*-* } 0 } */

6
gcc/testsuite/gcc.dg/pr86134.c Normal file
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@ -0,0 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-Wall -Werror -Wno-error=main -Wno-foobar" } */
void main() {} /* { dg-warning "return type" } */
/* { dg-message "unrecognized command-line option" "" { target *-*-* } 0 } */