glm/glm-1.0.1-fix-tests-big-endian.patch

From 06ce42e72324b32b1f4c37c646e99950c2bd5f6b Mon Sep 17 00:00:00 2001
From: Max Rees <maxcrees@me.com>
From: Matthias Fehring <buschmann23@opensuse.org>
Date: Wed, 14 May 2025 17:26:00 +0200
Subject: [PATCH] Fix test suite on big endian platforms
Upstream: submitted (https://github.com/g-truc/glm/pull/1001)

---
 glm/gtc/packing.inl      |   55 +++++++++++++++++++++++++++++++++++++++++++++++
 test/gtc/gtc_packing.cpp |    3 +-
 2 files changed, 57 insertions(+), 1 deletion(-)

--- a/glm/gtc/packing.inl	2024-02-27 18:19:47.000000000 +0100
+++ b/glm/gtc/packing.inl	2025-05-14 17:06:09.608767071 +0200
@@ -9,6 +9,9 @@
 #include "../detail/type_half.hpp"
 #include <cstring>
 #include <limits>
+extern "C" {
+#include <endian.h>
+}
 
 namespace glm{
 namespace detail
@@ -190,9 +193,15 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 3;
 			uint y : 3;
 			uint z : 2;
+#else
+            uint z : 2;
+			uint y : 3;
+			uint x : 3;
+#endif
 		} data;
 		uint8 pack;
 	};
@@ -201,8 +210,13 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 4;
 			uint y : 4;
+#else
+            uint y : 4;
+            uint x : 4;
+#endif
 		} data;
 		uint8 pack;
 	};
@@ -211,10 +225,17 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 4;
 			uint y : 4;
 			uint z : 4;
 			uint w : 4;
+#else
+            uint w : 4;
+			uint z : 4;
+			uint y : 4;
+			uint x : 4;
+#endif
 		} data;
 		uint16 pack;
 	};
@@ -223,9 +244,15 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 5;
 			uint y : 6;
 			uint z : 5;
+#else
+            uint z : 5;
+			uint y : 6;
+			uint x : 5;
+#endif
 		} data;
 		uint16 pack;
 	};
@@ -234,10 +261,17 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 5;
 			uint y : 5;
 			uint z : 5;
 			uint w : 1;
+#else
+            uint w : 1;
+			uint z : 5;
+			uint y : 5;
+			uint x : 5;
+#endif
 		} data;
 		uint16 pack;
 	};
@@ -252,10 +286,17 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 10;
 			uint y : 10;
 			uint z : 10;
 			uint w : 2;
+#else
+            uint w : 2;
+			uint z : 10;
+			uint y : 10;
+			uint x : 10;
+#endif
 		} data;
 		uint32 pack;
 	};
@@ -264,10 +305,17 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			int x : 10;
 			int y : 10;
 			int z : 10;
 			int w : 2;
+#else
+            int w : 2;
+			int z : 10;
+			int y : 10;
+			int x : 10;
+#endif
 		} data;
 		uint32 pack;
 	};
@@ -276,10 +324,17 @@
 	{
 		struct Data
 		{
+#if BYTE_ORDER == LITTLE_ENDIAN
 			uint x : 9;
 			uint y : 9;
 			uint z : 9;
 			uint w : 5;
+#else
+            uint w : 5;
+			uint z : 9;
+			uint y : 9;
+			uint x : 9;
+#endif
 		} data;
 		uint32 pack;
 	};
--- a/test/gtc/gtc_packing.cpp	2024-02-27 18:19:47.000000000 +0100
+++ b/test/gtc/gtc_packing.cpp	2025-05-14 17:07:45.510351543 +0200
@@ -4,6 +4,7 @@
 #include <glm/ext/vector_relational.hpp>
 #include <cstdio>
 #include <vector>
+#include <arpa/inet.h>
 
 /*
 static void print_bits(float const& s)
@@ -157,7 +158,7 @@
 
 	glm::u8vec4 const v0(0xff, 0x77, 0x0, 0x33);
 	glm::uint32 const p0 = *reinterpret_cast<glm::uint32 const*>(&v0[0]);
-	glm::uint32 const r0 = 0x330077ff;
+    glm::uint32 const r0 = htonl(0xff770033);
 
 	Error += p0 == r0 ? 0 : 1;