jdk9/jdk/src/java.desktop/share/native/libjavajpeg/imageioJPEG.c:2801:19: error: incompatible pointer types passing 'UINT8 **' (aka 'unsigned char **') to parameter of type 'void **' [-Werror,-Wincompatible-pointer-types]
        freeArray(scale, numBands);
                  ^~~~~
jdk9/jdk/src/java.desktop/share/native/libjavajpeg/imageioJPEG.c:2637:30: note: passing argument to parameter 'arr' here
static void freeArray(void** arr, jint size) {
                             ^