<rdar://problem/6944342> libLTO for darwin should add -static when assembling .s

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72881 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index 17c83bb..0bd2abe 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -249,6 +249,7 @@
     std::string targetTriple = _linker.getModule()->getTargetTriple();
     args.push_back(tool.c_str());
     if ( targetTriple.find("darwin") != targetTriple.size() ) {
+        // darwin specific command line options
         if (strncmp(targetTriple.c_str(), "i386-apple-", 11) == 0) {
             args.push_back("-arch");
             args.push_back("i386");
@@ -286,6 +287,9 @@
             args.push_back("-arch");
             args.push_back("armv6");
         }
+        // add -static to assembler command line when code model requires
+        if ( (_assemblerPath != NULL) && (_codeModel == LTO_CODEGEN_PIC_MODEL_STATIC) )
+            args.push_back("-static");
     }
     if ( needsCompilerOptions ) {
         args.push_back("-c");