Re: BSD >= 199306

[Petr Salinger <Petr.Salinger@seznam.cz>]

> > It depends on what you really want to test.
> > The kernel variant (FreeBSD) is signaled by __FreeBSD_kernel__
> > and libc variant (glibc) by __GLIBC__.
>
> What about OpenBSD?

I have just looked into source of prayer,

the main difference between linux and bsd are

1) os_limit_vm(), os_prctl_set_dumpable()
   they are no-op on BSD, so it is easy to guard them via __linux__

2) os_run_pty()
   on linux, there are available two variants - bsd one and sysv one.
   once again, it is easy to guard sysv one by __linux__

The difference between linux and solaris is also small,
on solaris is different locking and there is only one variant
for os_run_pty(), the sysv one.

The remaining differences are slightly different include files,
nonexistent socklen_t and ipv6 support on solaris.

IMHO, it would be much better to merge all three files
into one and use sensible defaults,
i.e.

  * IPV6 is supported
  * socklen_t is supported
  * os_limit_vm() and os_prctl_set_dumpable() are no-op by default
  * use BSD PTY
  * flock() does exist

and create exception for the above based on __linux__, __svr4__
and SOLARIS macros.


Petr