Index: ELF/LinkerScript.cpp
===================================================================
--- ELF/LinkerScript.cpp
+++ ELF/LinkerScript.cpp
@@ -211,6 +211,14 @@
 void LinkerScript::readOutputFormat() {
   // Error checking only for now.
   expect("(");
+  StringRef Tok = next();
+  Tok = next();
+  if (Tok == ")")
+   return;
+  if (Tok != ",")
+    error("unexpected token: " + Tok);
+  next();
+  expect(",");
   next();
   expect(")");
 }
Index: test/elf2/linkerscript-ouputformat.s
===================================================================
--- test/elf2/linkerscript-ouputformat.s
+++ test/elf2/linkerscript-ouputformat.s
@@ -0,0 +1,12 @@
+# REQUIRES: x86
+# RUN: echo "OUTPUT_FORMAT(\"elf64-x86-64-default\", \"elf64-x86-64-big\", \
+# RUN: \"elf64-x86-64-big\")" > %t.script
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-freebsd %s -o %t1
+# RUN: ld.lld2 -shared -o %t2 %t1 %t.script
+# RUN: llvm-readobj %t2 > /dev/null
+
+# RUN: echo "OUTPUT_FORMAT(\"elf64-x86-64-default\", \"elf64-x86-64-big\")" \
+# RUN:  > %t.script
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-freebsd %s -o %t1
+# RUN: not ld.lld2 -shared -o %t2 %t1 %t.script
+# RUN: llvm-readobj %t2 > /dev/null