VK> I've narrowed it down to this line in lwlib/config.h tickling the bug: VK> #define ATHENA_H_PATH X11/Xaw VK> The code preprocesses fine if that #define doesn't have a / in it (but VK> of course then loses because it can't fine the header files. I'm about VK> to report this to IBM. VK> The truly bizzare part is this exposed ANOTHER preproccesor bug - the code VK> would expand into *asking* for "#include <X11/Xaw/whatever.h>", but what would VK> get *included* was "#include <X11>". It quit after the /. VK> And yes, the preprocessor would happily suck in the directory. Gaak. VK> I've already reported that one. I would accept a patch that used something like this: #ifdef __XLC__ ... #endif to work around the bugs in the AIX C compiler. I might produce such a patch myself if I get access to a system to test it on (hint...). Martin