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Driver: Do not warn about unused -pthread when linking on darwin 

While there is nothing to do at link time to get pthreads support on
darwin, specifying the argument is fine and we should not warn about
unused arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@294065 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2017-02-03 23:09:31 +00:00
parent a25cf11c8e
commit e81fef1796
2 changed files with 8 additions and 0 deletions
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4
lib/Driver/Tools.cpp
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@ -8696,6 +8696,10 @@ void darwin::Linker::ConstructJob(Compilation &C, const JobAction &JA,
// Let the tool chain choose which runtime library to link.
getMachOToolChain().AddLinkRuntimeLibArgs(Args, CmdArgs);
// No need to do anything for pthreads. Claim argument to avoid warning.
Args.ClaimAllArgs(options::OPT_pthread);
Args.ClaimAllArgs(options::OPT_pthreads);
}
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {

4
test/Driver/darwin-ld-pthread.c Normal file
View File

@ -0,0 +1,4 @@
// RUN: %clang -Wunused-command-line-argument -pthread -target x86_64-apple-darwin -### /dev/null -o /dev/null 2>&1 | FileCheck %s
// There is nothing to do at link time to get pthread support. But do not warn.
// CHECK-NOT: argument unused during compilation: '-pthread'