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Add support to -Wa,-W in clang 

Summary:
Currently clang does not support -Wa,-W, which suppresses warning
messages in GNU assembler. Add this option for gcc compatibility.
https://bugs.llvm.org/show_bug.cgi?id=43651. Reland with differential
information.

Reviewers: bcain

Reviewed By: bcain

Subscribers: george.burgess.iv, gbiv, llozano, manojgupta, nickdesaulniers, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68884

llvm-svn: 374834
This commit is contained in:
Jian Cai 2019-10-14 22:28:03 +00:00
parent 89478148d8
commit 4ec5205da7
2 changed files with 15 additions and 1 deletions
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2
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -2140,7 +2140,7 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
CmdArgs.push_back("-msave-temp-labels");
} else if (Value == "--fatal-warnings") {
CmdArgs.push_back("-massembler-fatal-warnings");
} else if (Value == "--no-warn") {
} else if (Value == "--no-warn" || Value == "-W") {
CmdArgs.push_back("-massembler-no-warn");
} else if (Value == "--noexecstack") {
UseNoExecStack = true;

14
clang/test/Driver/as-w-option.c Normal file
View File

@ -0,0 +1,14 @@
// RUN: %clang -### %s -c -o tmp.o -fno-integrated-as -Wa,-W 2>&1 | FileCheck -check-prefix=CHECK-NOIAS %s
// RUN: %clang -### %s -c -o tmp.o -integrated-as -Wa,-W 2>&1 | FileCheck -check-prefix=CHECK-IAS %s
// RUN: %clang %s -c -o %t.o -integrated-as -Wa,-W 2>&1 | FileCheck -allow-empty --check-prefix=CHECK-AS-NOWARN %s
// RUN: %clang %s -c -o %t.o -fno-integrated-as -Wa,-W 2>&1 | FileCheck -allow-empty --check-prefix=CHECK-AS-NOWARN %s
// RUN: not %clang %s -c -o %t.o -integrated-as -Wa,--fatal-warnings 2>&1 | FileCheck --check-prefix=CHECK-AS-FATAL %s
// RUN: not %clang %s -c -o %t.o -fno-integrated-as -Wa,--fatal-warnings 2>&1 | FileCheck --check-prefix=CHECK-AS-FATAL %s
// CHECK-IAS: "-cc1" {{.*}} "-massembler-no-warn"
// CHECK-NOIAS: "-W"
// CHECK-AS-NOWARN-NOT: warning:
// CHECK-AS-FATAL-NOT: warning:
// CHECK-AS-FATAL: error
__asm(".warning");