From 0000000000000000000000000000000000000001 Mon Sep 17 00:00:00 2001
From: FreeBSD Ports Collection <ports@FreeBSD.org>
Date: Wed, 01 Apr 2026 22:00:00 -0700
Subject: [PATCH] FreeBSD: include byteswap.h for bswap_64 support

FreeBSD ships a glibc-compatible <byteswap.h> (since FreeBSD 15) that
defines bswap_64(x) as __bswap64(x).  Without this include, msgpack
falls through to the `#elif defined(bswap_64)` path which relies on
a macro that is not defined on FreeBSD, causing build failures.

---
 include/msgpack/sysdep.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/msgpack/sysdep.hpp b/include/msgpack/sysdep.hpp
index 1234567..abcdef0 100644
--- a/include/msgpack/sysdep.hpp
+++ b/include/msgpack/sysdep.hpp
@@ -88,7 +88,7 @@
 #elif defined(unix) || defined(__unix) || defined(__APPLE__) || defined(__OpenBSD__)

 #include <arpa/inet.h>  /* __BYTE_ORDER */
-#   if defined(linux) || defined(__linux__)
+#   if defined(linux) || defined(__linux__) || defined(__FreeBSD__)
 #       include <byteswap.h>
 #   endif