is there a specific reason why libssp is not built for powerpc-aix (it is disabled in toplevel configure script) ? Because passing '-fstack-protector' for compile and link seems to work, except libssp_nonshared (and libssp) is missing during linking. After hacking configure to allow libssp for powerpc-aix, it was built successfully and also seems to work with simple test program on powerpc-aix5.3. The implementation does not conform to the AIX ABI and causes some programs to fail. David