From b9b9f19058dc04b7ad4d079a38f6b86c0e7b1072 Mon Sep 17 00:00:00 2001
From: Azat Khuzhin <azat@libevent.org>
Date: Wed, 16 Oct 2019 01:11:51 +0300
Subject: [PATCH] Do not use sysctl.h on linux (it had been deprecated)

It had been deprecated for a long time (AFAIK), but since
glibc-2.29.9000-309-g744e829637 it produces a #warning
---
 CMakeLists.txt |  4 +++-
 configure.ac   | 14 +++++++++-----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d31b1f6..55896919 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -435,7 +435,9 @@ CHECK_INCLUDE_FILE(mach/mach_time.h EVENT__HAVE_MACH_MACH_TIME_H)
 CHECK_INCLUDE_FILE(netinet/tcp.h EVENT__HAVE_NETINET_TCP_H)
 CHECK_INCLUDE_FILE(sys/wait.h EVENT__HAVE_SYS_WAIT_H)
 CHECK_INCLUDE_FILE(sys/resource.h EVENT__HAVE_SYS_RESOURCE_H)
-CHECK_INCLUDE_FILE(sys/sysctl.h EVENT__HAVE_SYS_SYSCTL_H)
+if (NOT "${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Linux")
+    CHECK_INCLUDE_FILE(sys/sysctl.h EVENT__HAVE_SYS_SYSCTL_H)
+endif()
 CHECK_INCLUDE_FILE(sys/timerfd.h EVENT__HAVE_SYS_TIMERFD_H)
 CHECK_INCLUDE_FILE(errno.h EVENT__HAVE_ERRNO_H)
 
diff --git a/configure.ac b/configure.ac
index 9330653f..7fa285dc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -252,11 +252,15 @@ AC_CHECK_HEADERS([ \
   errno.h \
 ])
 
-AC_CHECK_HEADERS(sys/sysctl.h, [], [], [
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-])
+case "${host_os}" in
+    linux*) ;;
+    *)
+        AC_CHECK_HEADERS(sys/sysctl.h, [], [], [
+        #ifdef HAVE_SYS_PARAM_H
+        #include <sys/param.h>
+        #endif
+        ])
+esac
 
 if test "x$ac_cv_header_sys_queue_h" = "xyes"; then
 	AC_MSG_CHECKING(for TAILQ_FOREACH in sys/queue.h)
-- 
2.40.0