--- llvm-3.3.src/Makefile.rules.old	2014-07-29 12:01:50.000000000 +0530
+++ llvm-3.3/Makefile.rules	2014-07-29 12:02:10.000000000 +0530
@@ -571,9 +571,9 @@ ifeq ($(HOST_OS),Darwin)
   DARWIN_VERSION := `sw_vers -productVersion`
  endif
   # Strip a number like 10.4.7 to 10.4
-  DARWIN_VERSION := $(shell echo $(DARWIN_VERSION)| sed -E 's/(10.[0-9]).*/\1/')
+  DARWIN_VERSION := $(shell echo $(DARWIN_VERSION)| sed -E 's/(10.[0-9]+).*/\1/')
   # Get "4" out of 10.4 for later pieces in the makefile.
-  DARWIN_MAJVERS := $(shell echo $(DARWIN_VERSION)| sed -E 's/10.([0-9]).*/\1/')
+  DARWIN_MAJVERS := $(shell echo $(DARWIN_VERSION)| sed -E 's/10.([0-9]+).*/\1/')
 
   LoadableModuleOptions := -Wl,-flat_namespace -Wl,-undefined,suppress
   SharedLinkOptions := -dynamiclib