Driver: Add two special groups of "whitelisted" options which we know

clang doesn't support, and don't want to warn are unused. Eventually
these should disappear.

Here is a more readable list than is in the diff:

W options: -Wall, -Wcast-align, -Wchar-align, -Wchar-subscripts,
-Werror, -Wextra, -Winline, -Wint-to-pointer-cast, -Wmissing-braces,
-Wmost, -Wnested-externs, -Wno-format-y2k, -Wno-four-char-constants,
-Wno-missing-field-initializers, -Wno-trigraphs, -Wno-unknown-pragmas,
-Wno-unused-parameter, -Wparentheses, -Wpointer-arith,
-Wpointer-to-int-cast, -Wreturn-type, -Wshorten-64-to-32, -Wswitch,
-Wunused-function, -Wunused-label, -Wunused-value, -Wunused-variable,
-Wwrite-strings.

f options: -fasm-blocks, -fmessage-length=.

llvm-svn: 67549

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index dac9a6e3652..bd8404b784a 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -334,6 +334,18 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   const char *Exec = 
     Args.MakeArgString(getToolChain().GetProgramPath(C, "clang").c_str());
   Dest.addCommand(new Command(Exec, CmdArgs));
+
+  // Claim some arguments which clang doesn't support, but we don't
+  // care to warn the user about.
+  
+  // FIXME: Use iterator.
+  for (ArgList::const_iterator 
+         it = Args.begin(), ie = Args.end(); it != ie; ++it) {
+    const Arg *A = *it;
+    if (A->getOption().matches(options::OPT_clang_ignored_W_Group) ||
+        A->getOption().matches(options::OPT_clang_ignored_f_Group))
+      A->claim();
+  }
 }
 
 void gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,