Howdy,

The patches here add support for building on Mac OS X; with these changes, all included tests (executed via `make check') pass on both Mac OS X and FreeBSD.

I don't anticipate an immediate merge, but I wanted to go ahead and open this to allow for comment.

This patchset primarily consists of:

Adding compatibility shims for BSD-specific or later POSIX functionality that Mac OS X doesn't support (see compat/) Adding pkg_macho.c with support for Mach-O binary analysis.

For pkg_macho.c, I used ...