add CUNKNOWN make variables to entry Makefiles

2012/endoh2/Makefile

@@ -39,12 +39,15 @@ include ../../var.mk
 # Common C compiler warnings to silence
 #
 CSILENCE= -Wno-parentheses -Wno-empty-body -Wno-strict-prototypes \
-	  -Wno-format-overflow -Wno-int-in-bool-context -Wno-misleading-indentation \
-	  -Wno-unknown-warning-option
+	  -Wno-format-overflow -Wno-int-in-bool-context -Wno-misleading-indentation
+
+# Attempt to silence unknown warnings
+#
+CUNKNOWN= -Wno-unknown-warning-option
 
 # Common C compiler warning flags
 #
-CWARN= -Wall -Wextra -pedantic ${CSILENCE}
+CWARN= -Wall -Wextra ${CSILENCE} ${CUNKNOWN}
 
 # Compiler standard
 #
@@ -52,9 +55,6 @@ CSTD= -std=gnu11
 
 # Compiler bit architecture
 #
-# Some entries require 32-bitness: ARCH= -m32
-# Some entries require 64-bitness: ARCH= -m64
-#
 ARCH=
 
 # Defines that are needed to compile
@@ -88,8 +88,7 @@ ifeq "$(findstring $(CLANG),${CC})" "$(CLANG)"
 CSILENCE+= -Wno-comma -Wno-format-nonliteral -Wno-missing-variable-declarations \
 	   -Wno-poison-system-directories -Wno-float-conversion \
 	   -Wno-implicit-int-conversion -Wno-extra-semi-stmt \
-	   -Wno-unknown-warning-option -Wno-unsafe-buffer-usage \
-	   -Wno-extra-semi-stmt -Wno-unknown-warning-option -Wno-unsafe-buffer-usage
+	   -Wno-unsafe-buffer-usage -Wno-extra-semi-stmt -Wno-unsafe-buffer-usage
 #
 CWARN+= -Weverything
 #