[Driver] Allow drivers to add multiple libc++ include paths

This allows toolchain drivers to add multiple libc++ include paths akin
to libstdc++. This is useful in multiarch setup when some headers might
be in target specific include directory. There should be no functional
change.

Differential Revision: https://reviews.llvm.org/D45422

llvm-svn: 329748

1 files changed, 11 insertions, 7 deletions

diff --git a/clang/lib/Driver/ToolChains/NaCl.cpp b/clang/lib/Driver/ToolChains/NaCl.cpp
index 128478d6387..2e5365b4814 100644
--- a/clang/lib/Driver/ToolChains/NaCl.cpp
+++ b/clang/lib/Driver/ToolChains/NaCl.cpp
@@ -309,25 +309,29 @@ void NaClToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
   CmdArgs.push_back("-lc++");
 }
 
-std::string NaClToolChain::findLibCxxIncludePath() const {
+void NaClToolChain::addLibCxxIncludePaths(
+    const llvm::opt::ArgList &DriverArgs,
+    llvm::opt::ArgStringList &CC1Args) const {
   const Driver &D = getDriver();
 
   SmallString<128> P(D.Dir + "/../");
   switch (getTriple().getArch()) {
   case llvm::Triple::arm:
     llvm::sys::path::append(P, "arm-nacl/include/c++/v1");
-    return P.str();
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    break;
   case llvm::Triple::x86:
     llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1");
-    return P.str();
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    break;
   case llvm::Triple::x86_64:
     llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1");
-    return P.str();
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    break;
   case llvm::Triple::mipsel:
     llvm::sys::path::append(P, "mipsel-nacl/include/c++/v1");
-    return P.str();
-  default:
-    return "";
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    break;
   }
 }