I've included three patches against stunnel 3.19 that will allow
compilation on Mac OS X and Darwin.

Description:
common.h.patch
The pthread implamentation in Mac OS X and Darwin is slightly broken.
pthread_sigmask doesn't exist so if the compile flag __APPLE__ is defined,
then redifine pthread_sigmask to sigprocmask.

config.sub.patch and config.guess.patch
These patches update the config.sub and config.guess to include
information to guess Mac OS X and Darwin systems.


The common.h.patch is my own code and I am releasing under the BSD
License. The config patches are not my own changes and I'm not sure
exactly who did the chances. The config.sub and config.guess that the
patches are made with are from the Developer Tools that Apple distributes.
(i think they are just newer versions of your config.guess and config.sub)

Regards,
Aaron