From 80f82acdf88c68811711ed43be487f690dc0cf84 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Mon, 1 Dec 2025 17:31:55 -0600
Subject: [PATCH] quit: don't call signal() if we're using sigaction()

At best, this is a no-op.

At worst, it might:
 - Clobber a signal handler someone registered after us
 - Overwrite the signal mask or flags
 - Cause unregistration to fail (sigaction() isn't guaranteed to return the exact pointer passed to signal())

(cherry picked from commit 6d99204a829879a3dbe975c6158228d07bfc1a0d)
---
 src/events/SDL_quit.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/events/SDL_quit.c b/src/events/SDL_quit.c
index 5456203ee2..0e5f3e6c6d 100644
--- a/src/events/SDL_quit.c
+++ b/src/events/SDL_quit.c
@@ -46,8 +46,10 @@ static bool send_foregrounding_pending = false;
 
 static void SDL_HandleSIG(int sig)
 {
-    // Reset the signal handler
+#ifndef HAVE_SIGACTION
+    // Reset the signal handler if it was installed with signal()
     (void)signal(sig, SDL_HandleSIG);
+#endif
 
     // Send a quit event next time the event loop pumps.
     // We can't send it in signal handler; SDL_malloc() might be interrupted!