@@ -2992,6 +2992,7 @@ check_cflags -Wwrite-strings
check_cflags -Wtype-limits
check_cflags -Wundef
check_cflags -Wmissing-prototypes
+check_cflags -Wstrict-prototypes
enabled extra_warnings && check_cflags -Winline
# add some linker flags