- # Separate out the -Werror flag as some files just cannot be
- # compiled with it enabled.
- for w in ${build_warnings}; do
- case $w in
- -Werr*) WERROR_CFLAGS=-Werror ;;
- *) WARN_CFLAGS="${WARN_CFLAGS} $w"
- esac
- done
+ echo $ac_n "checking compiler warning flags""... $ac_c" 1>&6
+echo "configure:5522: checking compiler warning flags" >&5
+ # Separate out the -Werror flag as some files just cannot be
+ # compiled with it enabled.
+ for w in ${build_warnings}; do
+ case $w in
+ -Werr*) WERROR_CFLAGS=-Werror ;;
+ *) # Check that GCC accepts it
+ if $CC $w 2>&1 | grep 'unrecognized option' > /dev/null; then
+ :
+ else
+ WARN_CFLAGS="${WARN_CFLAGS} $w"
+ fi
+ esac
+ done
+ echo "$ac_t""${WARN_CFLAGS}${WERROR_CFLAGS}" 1>&6