GitLab

Co-authored-by: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>

* src/conf_post.h (HAVE_WORKING_VFORK): Don't undef.
(vfork): Don't define.
* src/process.c (create_process) [DARWIN_OS]: Use fork if pty_flag is
set, otherwise vfork.
* src/callproc.c (call_process) [DARWIN_OS]: Use TIOCNOTTY to detach
the controlling terminal instead of setsid.