From 484710f25be73d18fefa1e03339c9247e8ec7337 Mon Sep 17 00:00:00 2001
From: David Goulet <dgoulet@torproject.org>
Date: Mon, 9 Sep 2019 11:47:37 -0400
Subject: build: The <sys/sysctl.h> is now deprecated on Linux

Closes #31673
---
 changes/ticket31673 | 3 +++
 src/common/compat.c | 8 +++++---
 2 files changed, 8 insertions(+), 3 deletions(-)
 create mode 100644 changes/ticket31673

diff --git a/changes/ticket31673 b/changes/ticket31673
new file mode 100644
index 0000000000..3b2bb4a46e
--- /dev/null
+++ b/changes/ticket31673
@@ -0,0 +1,3 @@
+  o New system requirements (build system):
+    - Do not include the deprecated <sys/sysctl.h> on Linux or Windows system.
+      Closes 31673;
diff --git a/src/common/compat.c b/src/common/compat.c
index ee3bf0fd50..e99abcb16d 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -27,9 +27,6 @@
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
-#ifdef HAVE_SYS_SYSCTL_H
-#include <sys/sysctl.h>
-#endif
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
@@ -70,6 +67,11 @@
 #include <sys/capability.h>
 #endif
 
+/* Now deprecated in Linux GLIBC */
+#if defined(HAVE_SYS_SYSCTL_H) && !defined(_WIN32) && !defined(__linux__)
+#include <sys/sysctl.h>
+#endif
+
 #ifdef _WIN32
 #include <conio.h>
 #include <wchar.h>
-- 
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