diff --git a/lib/Target/CBackend/Makefile b/lib/Target/CBackend/Makefile
index 9b26d8b..9e00bdb 100644
--- a/lib/Target/CBackend/Makefile
+++ b/lib/Target/CBackend/Makefile
@@ -10,3 +10,6 @@
 LEVEL = ../../..
 LIBRARYNAME = LLVMCBackend
 include $(LEVEL)/Makefile.common
+
+CompileCommonOpts := $(filter-out -pedantic,$(CompileCommonOpts))
+CompileCommonOpts := $(filter-out -Wno-long-long,$(CompileCommonOpts))