commit c3658d2f24ad7d64713ddf3b921de4f75b1838d3
author David Majnemer <david.majnemer@gmail.com> Sat May 23 18:48:37 2015 +0000
committer David Majnemer <david.majnemer@gmail.com> Sat May 23 18:48:37 2015 +0000
tree ced6f1d99ae747a3d5b3d23a3d45210c66d11b95
parent 1577f1f484a21ed700327fd2b928097f6ffda021

[Driver] Handle -fno-signed-char and -fno-unsigned-char

GCC maps -fno-unsigned-char to -fsigned-char and -fno-signed-char to
-funsigned-char.

llvm-svn: 238105

clang/lib/Driver/Tools.cpp

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 9b25cab..19236eb 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -4151,9 +4151,16 @@
     CmdArgs.push_back("-fshort-enums");
 
   // -fsigned-char is default.
-  if (!Args.hasFlag(options::OPT_fsigned_char, options::OPT_funsigned_char,
-                    isSignedCharDefault(getToolChain().getTriple())))
+  if (Arg *A = Args.getLastArg(
+          options::OPT_fsigned_char, options::OPT_fno_signed_char,
+          options::OPT_funsigned_char, options::OPT_fno_unsigned_char)) {
+    if (A->getOption().matches(options::OPT_funsigned_char) ||
+        A->getOption().matches(options::OPT_fno_signed_char)) {
+      CmdArgs.push_back("-fno-signed-char");
+    }
+  } else if (!isSignedCharDefault(getToolChain().getTriple())) {
     CmdArgs.push_back("-fno-signed-char");
+  }
 
   // -fuse-cxa-atexit is default.
   if (!Args.hasFlag(options::OPT_fuse_cxa_atexit,