Pass -fno-math-builtin from the Clang driver to -cc1 for the l32 arch.

llvm-svn: 187061

clang/lib/Driver/Tools.cpp

@@ -3476,6 +3476,13 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
                    options::OPT_fno_apple_pragma_pack, false))
     CmdArgs.push_back("-fapple-pragma-pack");
 
+  // le32-specific flags: 
+  //  -fno-math-builtin: clang should not convert math builtins to intrinsics
+  //                     by default.
+  if (getToolChain().getArch() == llvm::Triple::le32) {
+    CmdArgs.push_back("-fno-math-builtin");
+  }
+
   // Default to -fno-builtin-str{cat,cpy} on Darwin for ARM.
   //
   // FIXME: This is disabled until clang -cc1 supports -fno-builtin-foo. PR4941.

clang/test/Driver/le32-toolchain.c

@@ -0,0 +1,4 @@
+// RUN: %clang -### -target le32-unknown-nacl %s 2>&1 | FileCheck -check-prefix=CHECK-DEFAULT %s
+
+// CHECK-DEFAULT: "-cc1" {{.*}} "-fno-math-builtin"
+