Index: lld/trunk/COFF/Driver.cpp
===================================================================
--- lld/trunk/COFF/Driver.cpp
+++ lld/trunk/COFF/Driver.cpp
@@ -80,6 +80,9 @@
     return std::unique_ptr<InputFile>(new ArchiveFile(MB));
   if (Magic == file_magic::bitcode)
     return std::unique_ptr<InputFile>(new BitcodeFile(MB));
+  if (Magic == file_magic::coff_cl_gl_object)
+    fatal(MB.getBufferIdentifier() + ": is not a native COFF file. "
+          "Recompile without /GL");
   if (Config->OutputFile == "")
     Config->OutputFile = getOutputPath(MB.getBufferIdentifier());
   return std::unique_ptr<InputFile>(new ObjectFile(MB));
Index: lld/trunk/test/COFF/cl-gl.test
===================================================================
--- lld/trunk/test/COFF/cl-gl.test
+++ lld/trunk/test/COFF/cl-gl.test
@@ -0,0 +1,4 @@
+# RUN: not lld-link /out:%t.exe /entry:main %S/Inputs/cl-gl.obj >& %t.log
+# RUN: FileCheck %s < %t.log
+
+# CHECK: is not a native COFF file. Recompile without /GL