Add driver support for -fsigned-char/-funsigned-char.

llvm-svn: 72930

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 68167e5cdc9..f3cfc653eb8 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -505,6 +505,16 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("-fblocks=0");
   }
 
+  // -fsigned-char/-funsigned-char default varies depending on platform; only
+  // pass if specified.
+  if (Arg *A = Args.getLastArg(options::OPT_fsigned_char,
+                               options::OPT_funsigned_char)) {
+    if (A->getOption().matches(options::OPT_fsigned_char))
+      CmdArgs.push_back("-fsigned-char");
+    else
+      CmdArgs.push_back("-fsigned-char=0");
+  }
+
   // -fno-pascal-strings is default, only pass non-default. If the
   // -tool chain happened to translate to -mpascal-strings, we want to
   // -back translate here.