From 4fe7cfeafe027f14ff0b0112d5d605e2cb3e17ce Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Mon, 12 Aug 2024 15:16:05 -0400
Subject: kqueue backend: Allow building without EVFILT_SIGNAL.

Just use the standard signal handling system in this case.

diff --git a/kqueue.c b/kqueue.c
index dfd7751..1e7ead6 100644
--- a/kqueue.c
+++ b/kqueue.c
@@ -105,6 +105,7 @@ const struct eventop kqops = {
 	EVENT_CHANGELIST_FDINFO_SIZE
 };
 
+#ifdef EVFILT_SIGNAL
 static const struct eventop kqsigops = {
 	"kqueue_signal",
 	NULL,
@@ -116,6 +117,7 @@ static const struct eventop kqsigops = {
 	0,
 	0
 };
+#endif
 
 static void *
 kq_init(struct event_base *base)
@@ -164,7 +166,11 @@ kq_init(struct event_base *base)
 		goto err;
 	}
 
+#ifdef EVFILT_SIGNAL
 	base->evsigsel = &kqsigops;
+#else
+	evsig_init_(base);
+#endif
 
 	return (kqueueop);
 err:
@@ -401,8 +407,10 @@ kq_dispatch(struct event_base *base, struct timeval *tv)
 			which |= EV_READ;
 		} else if (events[i].filter == EVFILT_WRITE) {
 			which |= EV_WRITE;
+#ifdef EVFILT_SIGNAL
 		} else if (events[i].filter == EVFILT_SIGNAL) {
 			which |= EV_SIGNAL;
+#endif
 #ifdef EVFILT_USER
 		} else if (events[i].filter == EVFILT_USER) {
 			base->is_notify_pending = 0;
@@ -412,9 +420,12 @@ kq_dispatch(struct event_base *base, struct timeval *tv)
 		if (!which)
 			continue;
 
+#ifdef EVFILT_SIGNAL
 		if (events[i].filter == EVFILT_SIGNAL) {
 			evmap_signal_active_(base, events[i].ident, 1);
-		} else {
+		} else
+#endif
+		{
 			evmap_io_active_(base, events[i].ident, which | EV_ET);
 		}
 	}
@@ -449,6 +460,7 @@ kq_dealloc(struct event_base *base)
 	kqop_free(kqop);
 }
 
+#ifdef EVFILT_SIGNAL
 /* signal handling */
 static int
 kq_sig_add(struct event_base *base, int nsignal, short old, short events, void *p)
@@ -510,6 +522,7 @@ kq_sig_del(struct event_base *base, int nsignal, short old, short events, void *
 
 	return (0);
 }
+#endif
 
 
 /* OSX 10.6 and FreeBSD 8.1 add support for EVFILT_USER, which we can use
-- 
2.45.2