Original commit by Georg Brandl.

The tests now pass all combinations of -O/-OO and -B.  See also #7071
and #6292 for previous variations on the same theme.

ensure "make install" creates symlinks in --prefix bin for the "-32"
files in the framework bin directory like the installer does.

Mac OS X and FreeBSD to reduce the chances of a crash instead of a
"maximum recursion depth" RuntimeError exception.
(patch by Ronald Oussoren)

Thanks for Catalin Iacob for the patch.

division (python -Qnew). Patch written by Ralf W. Grosse-Kunstleve.

the file is closed.

heap fragmentation and MemoryError with some malloc implementations.