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Accept and ignore -Wa,-mbig-obj on COFF targets for gas compatibility 

LLVM's integrated assembler will automatically switch to big objects
when there are more than 2**16 sections.

Patch by Kyra!

llvm-svn: 290979
This commit is contained in:
Reid Kleckner 2017-01-04 18:16:32 +00:00
parent 49152b3f06
commit c1afcd7c79
2 changed files with 13 additions and 0 deletions
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4
clang/lib/Driver/Tools.cpp
View File

@ -3067,6 +3067,10 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
continue;
}
if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
Value == "-mbig-obj")
continue; // LLVM handles bigobj automatically
switch (C.getDefaultToolChain().getArch()) {
default:
break;

9
clang/test/Driver/mbig-obj.c Normal file
View File

@ -0,0 +1,9 @@
// RUN: %clang --target=x86_64-windows -c -Wa,-mbig-obj %s 2>&1 | FileCheck %s --check-prefix=WINDOWS
// RUN: %clang --target=x86_64-windows -c -Xassembler -mbig-obj %s 2>&1 | FileCheck %s --check-prefix=WINDOWS
// RUN: not %clang --target=x86_64-linux -c -Wa,-mbig-obj %s 2>&1 | FileCheck %s --check-prefix=LINUX
// RUN: not %clang --target=x86_64-linux -c -Xassembler -mbig-obj %s 2>&1 | FileCheck %s --check-prefix=LINUX
// WINDOWS-NOT: argument unused during compilation
// LINUX: unsupported argument '-mbig-obj' to option '{{(Wa,|Xassembler)}}'
#ifdef _WIN32
#warning "produce non-empty output for FileCheck"
#endif