From f7b886babdbdf8bff7f095da3450fc460434d2b0 Mon Sep 17 00:00:00 2001
From: Alfred Wingate <parona@protonmail.com>
Date: Sat, 28 Oct 2023 04:18:08 +0300
Subject: [PATCH] guard sysctl.h include with pre-existing autoconf check

* HAVE_SYSCTLBYNAME and HAVE_SYS_SYSCTL could be paired together as
  sysctlbyname isn't available if sysctl.h isn't available.
* Sysctl syscall isn't available in linux >=5.5 and the header
  is absent in glibc-2.32 and musl-1.0.0

Closes: https://github.com/Juniper/libxo/issues/87
Signed-off-by: Alfred Wingate <parona@protonmail.com>
---
 libxo/xo_syslog.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libxo/xo_syslog.c b/libxo/xo_syslog.c
index 62da1811..4a16c3a5 100644
--- a/libxo/xo_syslog.c
+++ b/libxo/xo_syslog.c
@@ -58,7 +58,9 @@
 #include <stdarg.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#ifdef HAVE_SYS_SYSCTL
 #include <sys/sysctl.h>
+#endif
 
 #include "xo_config.h"
 #include "xo.h"