VK> Modified Files: VK> Tag: release-21-2 VK> aix4.h VK> Log Message: VK> Port "portable" dumper to SunOS 4 and HP-UX. VK> (No, I've not actually checked the file... I just had massive cognitive VK> dissonance when I saw it ;) It all makes perfect sense. aix4.h used to have #ifndef MAP_FAILED #define MAP_FAILED #endif Since it turned out hpux and sunos4 have the same problem, it made more sense to move the #ifndef out to where MAP_FAILED was used, thereby "porting" to all other platforms where MAP_FAILED failed to be defined.