Driver: For clang, accept -fsigned-bitfields and reject
-funsigned-bitfields for now (clang defaults to -fsigned-bitfields).
- <rdar://problem/6790309> ER: Support
-fsigned-bitfields/-funsigned-bitfields
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69131 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 7c73780..c266cc2 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -473,6 +473,13 @@
if (!Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common))
CmdArgs.push_back("-fno-common");
+ // -fsigned-bitfields is default, and clang doesn't yet support
+ // --funsigned-bitfields.
+ if (!Args.hasFlag(options::OPT_fsigned_bitfields,
+ options::OPT_funsigned_bitfields))
+ D.Diag(clang::diag::warn_drv_clang_unsupported)
+ << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args);
+
Args.AddLastArg(CmdArgs, options::OPT_dM);
Args.AddLastArg(CmdArgs, options::OPT_dD);