__MWERKS__        129 lib/libz/zconf.h #if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
__MWERKS__        131 lib/libz/zutil.h #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
__MWERKS__         69 net/zlib.h     #ifdef	__MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */