silence warnings under macOS for cc, clang and gcc

Used the following script to check for warnings
not silenced via ${CSILENCE}:

```sh
find ???? -mindepth 1 -maxdepth 1 -type d | while read dir; do
(cd "$dir"; echo =-=-= "$dir" =-=-= ; csilence -v 1 clobber all ; echo ; csilence -v 1 clobber alt)
done 2>&1 | less
```

2014/maffiodo1/Makefile

@@ -41,7 +41,8 @@ include ../../var.mk
 CSILENCE= -Wno-error -Wno-implicit-function-declaration \
 	-Wno-incompatible-function-pointer-types -Wno-incompatible-pointer-types \
 	-Wno-int-conversion -Wno-missing-field-initializers -Wno-parentheses \
-	-Wno-pointer-sign -Wno-return-type -Wno-unused-parameter -Wno-implicit-int
+	-Wno-pointer-sign -Wno-return-type -Wno-unused-parameter -Wno-implicit-int \
+	-Wno-deprecated-non-prototype
 
 # Common C compiler warning flags
 #
@@ -89,7 +90,8 @@ ifeq ($(CC),clang)
 CSILENCE+= -Wno-comma -Wno-documentation -Wno-extra-semi -Wno-implicit-int \
 	-Wno-missing-prototypes -Wno-missing-variable-declarations -Wno-padded \
 	-Wno-pedantic -Wno-poison-system-directories -Wno-shadow \
-	-Wno-shorten-64-to-32 -Wno-sign-conversion -Wno-strict-prototypes
+	-Wno-shorten-64-to-32 -Wno-sign-conversion -Wno-strict-prototypes \
+	-Wno-declaration-after-statement -Wno-implicit-int-conversion
 #
 CWARN+= -Weverything
 #