Driver: Add a --rtlib={compiler-rt,libgcc} argument which I plan to use to allow

dual support for compiler-rt on Linux, during bringup.

llvm-svn: 146094

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index fa4cf418893..29559a6ae22 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -440,6 +440,16 @@ void DarwinClang::AddLinkRuntimeLib(const ArgList &Args,
 
 void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
                                         ArgStringList &CmdArgs) const {
+  // Darwin only supports the compiler-rt based runtime libraries.
+  switch (GetRuntimeLibType(Args)) {
+  case ToolChain::RLT_CompilerRT:
+    break;
+  default:
+    getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
+      << Args.getLastArg(options::OPT_rtlib_EQ)->getValue(Args) << "darwin";
+    return;
+  }
+
   // Darwin doesn't support real static executables, don't link any runtime
   // libraries with -static.
   if (Args.hasArg(options::OPT_static))