From 15a9e73a1793a61b87d3f460e2e4bc5b7df1e6a8 Mon Sep 17 00:00:00 2001
From: Po Lu <luangruo@yahoo.com>
Date: Sat, 6 Aug 2022 10:27:03 +0800
Subject: [PATCH] * src/callproc.c (emacs_spawn): Fix Mac OS X build.

---
 src/callproc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/callproc.c b/src/callproc.c
index aec0a2f5a58..e8e4c48b5be 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -1488,7 +1488,7 @@ emacs_spawn (pid_t *newpid, int std_in, int std_out, int std_err,
   /* Darwin doesn't let us run setsid after a vfork, so use fork when
      necessary.  Below, we reset SIGCHLD handling after a vfork, as
      apparently macOS can mistakenly deliver SIGCHLD to the child.  */
-  if (pty != NULL)
+  if (pty_in || pty_out)
     pid = fork ();
   else
     pid = VFORK ();
-- 
2.39.2