oops, I meant this


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26200 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.rules b/Makefile.rules
index b6178d6..33432b8 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -347,7 +347,7 @@
 CompileCommonOpts := -Wall -W -Wwrite-strings -Wno-unused
 
 ifeq ($(OS),HP-UX)
-  CompileCommonOpts += -D_REENTRANT -D_HPUX_SOURCE
+  CompileCommonOpts := -D_REENTRANT -D_HPUX_SOURCE
 endif
 
 LD.Flags  += -L$(LibDir) -L$(LLVMLibDir)