From 9dcfb54438822c0955da98077f63e36ce3d19dd8 Mon Sep 17 00:00:00 2001
From: Alexander Sokolov <sokoloff.a@gmail.com>
Date: Sat, 1 Jun 2024 15:47:51 +0300
Subject: [PATCH] Use CMake to determine endianness

---
 CMakeLists.txt                     | 26 ++++++++++++++++++++++++++
 vendor/alac/codec/EndianPortable.c | 14 ++------------
 2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 53e9cf3..529c190 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,32 @@ LIST(APPEND SOURCES
 )
 
 
+# Defining the bit order for different architectures
+if(CMAKE_VERSION VERSION_LESS "3.20.0")
+    include(TestBigEndian)
+    TEST_BIG_ENDIAN(big_endian)
+    if (${big_endian})
+        set(TARGET_RT_LITTLE_ENDIAN 0)
+    else()
+        set(TARGET_RT_LITTLE_ENDIAN 1)
+    endif()
+else()
+    if (${CMAKE_CXX_BYTE_ORDER} STREQUAL "LITTLE_ENDIAN")
+        set(TARGET_RT_LITTLE_ENDIAN 1)
+    else()
+        set(TARGET_RT_LITTLE_ENDIAN 0)
+    endif()
+endif()
+
+if (${TARGET_RT_LITTLE_ENDIAN})
+    message(STATUS "Use little endian")
+else()
+    message(STATUS "Use big endian")
+endif()
+
+add_definitions(-DTARGET_RT_LITTLE_ENDIAN=${TARGET_RT_LITTLE_ENDIAN})
+# Defining the bit order for different architectures
+
 add_definitions(-DPROJECT_NAME=\"${PROJECT_NAME}\")
 add_definitions(-DPROJECT_VERSION=\"${CMAKE_PROJECT_VERSION}\")
 add_definitions(-DPROJECT_DESCRIPTION=\"${PROJECT_DESCRIPTION}\")
diff --git a/vendor/alac/codec/EndianPortable.c b/vendor/alac/codec/EndianPortable.c
index da9423d..971bd6c 100644
--- a/vendor/alac/codec/EndianPortable.c
+++ b/vendor/alac/codec/EndianPortable.c
@@ -28,18 +28,8 @@
 #include "EndianPortable.h"
 
 // *****************************************
-// Defining the bit order for different architectures
-#include <stdint.h>
-
-#if defined(__linux__) || defined(__unix__)
-#include <endian.h>
-#endif
-
-#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#define TARGET_RT_LITTLE_ENDIAN 1
-#elif defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define TARGET_RT_LITTLE_ENDIAN 0
-#else
+// The TARGET_RT_LITTLE_ENDIAN macro is defined in CMakeList
+#ifndef TARGET_RT_LITTLE_ENDIAN
 #error Cannot determine endianness!
 #endif
 // *****************************************