clang-cl: pass -debug flag to the linker when compiling with debug info

llvm-svn: 207233

clang/lib/Driver/Tools.cpp

@@ -7435,6 +7435,10 @@ void visualstudio::Link::ConstructJob(Compilation &C, const JobAction &JA,
 
   CmdArgs.push_back("-nologo");
 
+  if (Args.hasArg(options::OPT_g_Group)) {
+    CmdArgs.push_back("-debug");
+  }
+
   bool DLL = Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd);
 
   if (DLL) {

clang/test/Driver/cl-link.c

@@ -31,3 +31,7 @@
 // ASAN-DLL: "-incremental:no"
 // ASAN-DLL: "{{.*}}clang_rt.asan_dll_thunk-i386.lib"
 // ASAN-DLL: "{{.*}}cl-link{{.*}}.obj"
+
+// RUN: %clang_cl /Zi /Tc%s -### 2>&1 | FileCheck --check-prefix=DEBUG %s
+// DEBUG: link.exe
+// DEBUG: "-debug"