Porting/Macros

Some projects have been ported to Apple ppc64. In that case, they may test macros like this:

1. if defined(__ppc64__)
2. endif

GCC does not define __ppc64__. It defines __PPC64__. To make the above code build on Debian ppc64le or Debian ppc64, the summary is: change the above code to:

1. if defined(__ppc64__) || defined(__PPC64__)
2. endif