[clang] eba6160 - [flang][Driver] Support --no-warnings option (#107455)

[via cfe-commits]

Author: Tarun Prabhu
Date: 2024-09-09T09:57:49-06:00
New Revision: eba6160deec5a32e4b31c2a446172d0e388195c9

URL: https://github.com/llvm/llvm-project/commit/eba6160deec5a32e4b31c2a446172d0e388195c9
DIFF: https://github.com/llvm/llvm-project/commit/eba6160deec5a32e4b31c2a446172d0e388195c9.diff

LOG: [flang][Driver] Support --no-warnings option (#107455)

Because of the way visibility is implemented in Options.td, options that
are aliases do not inherit the visibility of the option being aliased.
Therefore, explicitly set the visibility of the alias to be the same as
the aliased option.

This partially addresses
https://github.com/llvm/llvm-project/issues/89888

Added: 
    

Modified: 
    clang/include/clang/Driver/Options.td
    flang/test/Driver/w-option.f90

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 37e80c24be3214..bf8569fc780d6a 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -5986,7 +5986,9 @@ def _no_line_commands : Flag<["--"], "no-line-commands">, Alias<P>;
 def _no_standard_includes : Flag<["--"], "no-standard-includes">, Alias<nostdinc>;
 def _no_standard_libraries : Flag<["--"], "no-standard-libraries">, Alias<nostdlib>;
 def _no_undefined : Flag<["--"], "no-undefined">, Flags<[LinkerInput]>;
-def _no_warnings : Flag<["--"], "no-warnings">, Alias<w>;
+def _no_warnings : Flag<["--"], "no-warnings">,
+  Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
+  Alias<w>;
 def _optimize_EQ : Joined<["--"], "optimize=">, Alias<O>;
 def _optimize : Flag<["--"], "optimize">, Alias<O>;
 def _output_class_directory_EQ : Joined<["--"], "output-class-directory=">, Alias<foutput_class_dir_EQ>;

diff  --git a/flang/test/Driver/w-option.f90 b/flang/test/Driver/w-option.f90
index e34cddaab373a1..b6aa44a06ab729 100644
--- a/flang/test/Driver/w-option.f90
+++ b/flang/test/Driver/w-option.f90
@@ -4,6 +4,9 @@
 ! Test that the warnings are not generated with `-w` option.
 ! RUN: %flang -c -w %s 2>&1 | FileCheck --allow-empty %s -check-prefix=WARNING
 
+! Test that the warnings are not generated with `--no-warnings` option.
+! RUN: %flang -c --no-warnings %s 2>&1 | FileCheck --allow-empty %s -check-prefix=WARNING
+
 ! Test that warnings are portability messages are generated.
 ! RUN: %flang -c -pedantic %s 2>&1 | FileCheck %s -check-prefixes=DEFAULT,PORTABILITY