From dda6d2f59610fcf75cc9a152467285ae40de0442 Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Sun, 28 Jun 2020 22:19:41 -0400
Subject: [PATCH] subproc: check for __NR_clone3

---
 src/lib/fd.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/lib/fd.c b/src/lib/fd.c
index 1ddceaf7b..7c7027f19 100644
--- a/src/lib/fd.c
+++ b/src/lib/fd.c
@@ -11,8 +11,7 @@
 #include <linux/wait.h>
 #include <asm/unistd.h>
 #include <linux/sched.h>
-#ifndef CLONE_CLEAR_SIGHAND // FIXME introduced in linux 5.5
-#define CLONE_CLEAR_SIGHAND 0x100000000ULL
+#if (defined(__NR_clone3) && defined(P_PIDFD) && defined(CLONE_CLEAR_SIGHAND))
 #endif
 #define USING_PIDFD
 #endif