ifdef setpgid() usage in lib/spawni.c for Minix

[Thomas Cort]

Hello,

I've been working on pkgsrc for the Minix project and we've been
patching lib/spawni.c in several packages (bison, gettext, m4, ...)
because Minix lacks setpgid(). I lack the autotools and gnulib
knowledge to patch & test gnulib itself, but in general the fix would
involve adding a check for setpgid() and ifdef'ing out the part of
spawni.c that sets the process group id. So, something like this...

m4/posix_spawn.m4?:
AC_CHECK_FUNCS([setpgid])

lib/spawni.c:
#ifdef HAVE_SETPGID
   /* Set the process group ID.  */
   if ((flags & POSIX_SPAWN_SETPGROUP) != 0
       && setpgid (0, attrp->_pgrp) != 0)
     _exit (SPAWN_ERROR);
#endif

Thanks,
Thomas