# Add CPPFLAGS/CFLAGS/LDFLAGS to CC for testing features
XCC="${CC:=cc} $CFLAGS $OS_CFLAGS $CPPFLAGS $LDFLAGS"
# Make sure to disable --as-needed for CC tests.
-XCC="$XCC -Wl,--no-as-needed"
+
+case "$OS" in
+ darwin) ;;
+ *) XCC="$XCC -Wl,--no-as-needed" ;;
+esac
check_func() {
func="$1"; src="$2"; shift 2