Fix linking on Alpha


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29219 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Makefile b/lib/CodeGen/Makefile
index e77a53a..62ef1ad 100644
--- a/lib/CodeGen/Makefile
+++ b/lib/CodeGen/Makefile
@@ -10,6 +10,7 @@
 LEVEL = ../..
 LIBRARYNAME = LLVMCodeGen
 PARALLEL_DIRS = SelectionDAG
+BUILD_ARCHIVE = 1
 
 include $(LEVEL)/Makefile.common