diff --git a/lld/COFF/Driver.cpp b/lld/COFF/Driver.cpp
--- a/lld/COFF/Driver.cpp
+++ b/lld/COFF/Driver.cpp
@@ -279,6 +279,10 @@
   } else if (magic == file_magic::bitcode) {
     obj =
         make<BitcodeFile>(ctx, mb, parentName, offsetInArchive, /*lazy=*/false);
+  } else if (magic == file_magic::coff_cl_gl_object) {
+    error(mb.getBufferIdentifier() +
+          ": is not a native COFF file. Recompile without /GL?");
+    return;
   } else {
     error("unknown file type: " + mb.getBufferIdentifier());
     return;
diff --git a/lld/test/COFF/Inputs/cl-gl.lib b/lld/test/COFF/Inputs/cl-gl.lib
new file mode 100755
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

literal 0
Hc$@<O00001

diff --git a/lld/test/COFF/cl-gl.test b/lld/test/COFF/cl-gl.test
--- a/lld/test/COFF/cl-gl.test
+++ b/lld/test/COFF/cl-gl.test
@@ -1,4 +1,6 @@
 # RUN: not lld-link /out:%t.exe /entry:main %S/Inputs/cl-gl.obj >& %t.log
 # RUN: FileCheck %s < %t.log
+# RUN: not lld-link /out:%t.exe /entry:main %S/Inputs/cl-gl.lib >& %t1.log
+# RUN: FileCheck %s < %t1.log
 
 # CHECK: is not a native COFF file. Recompile without /GL