add CUNKNOWN make variables to entry Makefiles

1990/dds/Makefile

@@ -43,11 +43,15 @@ CSILENCE= -Wno-builtin-requires-header -Wno-char-subscripts \
 	  -Wno-implicit-function-declaration -Wno-incompatible-library-redeclaration \
 	  -Wno-parentheses -Wno-implicit-int -Wno-deprecated-non-prototype \
 	  -Wno-return-type -Wno-strict-prototypes -Wno-builtin-declaration-mismatch \
-	  -Wno-misleading-indentation -Wno-unused-value -Wno-unknown-warning-option
+	  -Wno-misleading-indentation -Wno-unused-value
+
+# 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
 #
@@ -55,9 +59,6 @@ CSTD= -std=gnu90
 
 # Compiler bit architecture
 #
-# Some entries require 32-bitness: ARCH= -m32
-# Some entries require 64-bitness: ARCH= -m64
-#
 ARCH=
 
 # Defines that are needed to compile
@@ -90,7 +91,7 @@ ifeq "$(findstring $(CLANG),${CC})" "$(CLANG)"
 #
 CSILENCE+= -Wno-comma -Wno-missing-prototypes -Wno-missing-variable-declarations \
 	   -Wno-poison-system-directories -Wno-shadow -Wno-shorten-64-to-32 \
-	   -Wno-unreachable-code-return -Wno-unknown-warning-option -Wno-unsafe-buffer-usage
+	   -Wno-unreachable-code-return -Wno-unsafe-buffer-usage
 #
 CWARN+= -Weverything
 #