* src/gpg-error.h.in (@define:struct_spawn_cb_arg@): Remove.
(gpgrt_spawn_actions_t): New.
(@define:spawn_actions_functions@): New.
* src/gpgrt-int.h (_gpgrt_spawn_actions_new)
(_gpgrt_spawn_actions_release, _gpgrt_spawn_actions_set_envvars)
(_gpgrt_spawn_actions_set_redirect): New.
[HAVE_W32_SYSTEM] (_gpgrt_spawn_actions_set_inherit_handles): New.
[!HAVE_W32_SYSTEM] (_gpgrt_spawn_actions_set_inherit_fds)
(_gpgrt_spawn_actions_set_atfork): New.
(_gpgrt_process_spawn): Use gpgrt_spawn_actions_t.
(_gpgrt_spawn_helper): Remove.
* src/mkheader.c: Emit gpgrt_spawn_actions_* definition.
* src/spawn-posix.c(_gpgrt_spawn_actions_new)
(_gpgrt_spawn_actions_release, _gpgrt_spawn_actions_set_envvars)
(_gpgrt_spawn_actions_set_redirect)
(_gpgrt_spawn_actions_set_inherit_fds)
(_gpgrt_spawn_actions_set_atfork): New.
(spawn_detached, _gpgrt_process_spawn): Use gpgrt_spawn_actions_t.
(_gpgrt_spawn_helper): Remove.
* src/spawn-w32.c: Ditto, with
_gpgrt_spawn_actions_set_inherit_handles, but no
_gpgrt_spawn_actions_set_atfork.