diff --git a/common_arm/Makefile.common b/common_arm/Makefile.common
index 1a1496490..f44f89106 100644
--- a/common_arm/Makefile.common
+++ b/common_arm/Makefile.common
@@ -55,7 +55,7 @@ DEFCFLAGS += -Wstrict-prototypes -Wno-error=strict-prototypes
 #DEFCFLAGS += -Wredundant-decls -Wno-error=redundant-decls
 #DEFCFLAGS += -Wcast-align -Wno-error=cast-align
 
-# Next ones are activated only if GCCEXTRA=1 or CLANGEXTRA=1
+# Next ones are activated only if GCCEXTRA=1
 EXTRACFLAGS =
 EXTRACFLAGS += -Wunused-parameter -Wno-error=unused-parameter
 EXTRACFLAGS += -Wswitch-enum -Wno-error=switch-enum
@@ -84,20 +84,6 @@ GCCEXTRACFLAGS += -Wcast-align -Wno-error=cast-align
 ifeq ($(GCCEXTRA),1)
   DEFCFLAGS += $(GCCEXTRACFLAGS) $(EXTRACFLAGS)
 endif
-# unknown to gcc or old clang:
-# First we activate Wextra then we explicitly list those we know about
-# Those without -Wno-error are supposed to be completely solved
-CLANGEXTRACFLAGS = -Wextra 
-CLANGEXTRACFLAGS += -Wtautological-type-limit-compare
-CLANGEXTRACFLAGS += -Wnull-pointer-arithmetic
-CLANGEXTRACFLAGS += -Woverride-init
-CLANGEXTRACFLAGS += -Wshift-negative-value
-CLANGEXTRACFLAGS += -Wimplicit-fallthrough
-# tolerate warnings when using clang
-CLANGEXTRACFLAGS += -Wno-unused-command-line-argument -Wno-error=unknown-attributes -Wno-error=undef -Wno-error=keyword-macro -Wno-error=incompatible-library-redeclaration -Wno-error=macro-redefined -Wno-error=gnu-include-next
-ifeq ($(CLANGEXTRA),1)
-  DEFCFLAGS += $(CLANGEXTRACFLAGS) $(EXTRACFLAGS)
-endif
 
 CFLAGS ?= $(DEFCFLAGS)
 CFLAGS += $(ARMCFLAGS) -c $(INCLUDE) -std=c99 $(APP_CFLAGS)