From 71e81f3e8db6e95cac5bffb43d42c41f8bcabac8 Mon Sep 17 00:00:00 2001
From: Otto Moerbeek <otto.moerbeek@open-xchange.com>
Date: Thu, 6 Nov 2025 09:07:12 +0100
Subject: [PATCH] We're runing on a posix system, so we can expect endian.h to
 exist

Should fix #16091

Signed-off-by: Otto Moerbeek <otto.moerbeek@open-xchange.com>
---
 ext/protozero/include/protozero/config.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ext/protozero/include/protozero/config.hpp b/ext/protozero/include/protozero/config.hpp
index 6fc7749049..68481d2c76 100644
--- a/ext/protozero/include/protozero/config.hpp
+++ b/ext/protozero/include/protozero/config.hpp
@@ -18,6 +18,14 @@ documentation.
  * @brief Contains macro checks for different configurations.
  */
 
+#if __has_include(<endian.h>)
+#include <endian.h> // Recent posix
+#elif __has_include(<machine/endian.h>)
+#include <machine/endian.h> // Common place on older BSD derived systems
+#else
+#error no endian.h found
+#endif
+
 #define PROTOZERO_LITTLE_ENDIAN 1234
 #define PROTOZERO_BIG_ENDIAN    4321
 
@@ -35,6 +43,9 @@ documentation.
 # define PROTOZERO_BYTE_ORDER PROTOZERO_LITTLE_ENDIAN
 #endif
 
+// Sanity check
+static_assert(PROTOZERO_BYTE_ORDER == BYTE_ORDER);
+
 // Check whether __builtin_bswap is available
 #if defined(__GNUC__) || defined(__clang__)
 # define PROTOZERO_USE_BUILTIN_BSWAP
-- 
2.47.3