Allow client Makefiles control over whether they want -pedantic by
defining NO_PEDANTIC.
  - Pedantic C89 is a painful language...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71545 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.rules b/Makefile.rules
index bcaed80..41694bd 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -515,7 +515,10 @@
 # Options To Invoke Tools
 #----------------------------------------------------------
 
-CompileCommonOpts += -pedantic -Wall -W -Wwrite-strings -Wno-long-long \
+ifndef NO_PEDANTIC
+CompileCommonOpts += -pedantic
+endif
+CompileCommonOpts += -Wall -W -Wwrite-strings -Wno-long-long \
                      -Wunused -Wno-unused-parameter $(EXTRA_OPTIONS)
 
 ifeq ($(OS),HP-UX)