[glib: 1/2] gtestdbus: Use posix_spawn() to spawn dbus-daemon

[Simon McVittie <smcv src gnome org>]

commit eb867c3d2fabcb005d964b553e79955276023fc8
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Feb 26 10:45:45 2020 +0000

    gtestdbus: Use posix_spawn() to spawn dbus-daemon
    
    This speeds up tests which use `GTestDBus` significantly.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 gio/gtestdbus.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gio/gtestdbus.c b/gio/gtestdbus.c
index 11cf029d9..633c93534 100644
--- a/gio/gtestdbus.c
+++ b/gio/gtestdbus.c
@@ -604,11 +604,12 @@ start_daemon (GTestDBus *self)
   g_spawn_async_with_pipes (NULL,
                             (gchar **) argv,
                             NULL,
-#ifdef G_OS_WIN32
                             /* We Need this to get the pid returned on win32 */
                             G_SPAWN_DO_NOT_REAP_CHILD |
-#endif
-                            G_SPAWN_SEARCH_PATH,
+                            G_SPAWN_SEARCH_PATH |
+                            /* dbus-daemon will not abuse our descriptors, and
+                             * passing this means we can use posix_spawn() for speed */
+                            G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
                             NULL,
                             NULL,
                             &self->priv->bus_pid,