From dbeec268b7a37f4d864c007eccdab7a2b477cfa5 Mon Sep 17 00:00:00 2001
From: Merry <git@mary.rs>
Date: Sun, 29 Oct 2023 15:41:12 +0000
Subject: [PATCH] oaknut: feature_detection_freebsd: Warn about incompatibility
 with earlier FreeBSD versions

---
 .../oaknut/feature_detection/feature_detection_freebsd.hpp   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/oaknut/feature_detection/feature_detection_freebsd.hpp b/include/oaknut/feature_detection/feature_detection_freebsd.hpp
index 714408e..efb3c66 100644
--- a/include/oaknut/feature_detection/feature_detection_freebsd.hpp
+++ b/include/oaknut/feature_detection/feature_detection_freebsd.hpp
@@ -7,6 +7,7 @@
 #include <optional>
 
 #include <sys/auxv.h>
+#include <sys/param.h>
 
 #include "oaknut/feature_detection/cpu_feature.hpp"
 #include "oaknut/feature_detection/feature_detection_hwcaps.hpp"
@@ -20,6 +21,10 @@
 #    define AT_HWCAP2 26
 #endif
 
+#if __FreeBSD_version < 1300114
+#    error "Incompatible ABI change (incorrect HWCAP definitions on earlier FreeBSD versions)"
+#endif
+
 namespace oaknut {
 
 namespace detail {