> I believe HAVE_ is for compiler-type features, > (e.g. HAVE_STDLIB_H, HAVE_ALTIVEC, HAVE_FOUR_BYTE_INTS) > > and CONFIG_ is for user-level features - > things that can be turned off and on by configure. > (e.g. CONFIG_SWSCALER, CONFIG_USE_XV) > Seems coherent. Also, HAVE_ is the prefix used by autoconf tests... Fran?ois.