Bug: https://bugs.gentoo.org/905999
Upstream: https://leethomason/tinyxml2/pull/945

From dfcb914e8bbbb2dca146a3cee62f66fff7ea163b Mon Sep 17 00:00:00 2001
From: Violet Purcell <vimproved@inventati.org>
Date: Thu, 8 Jun 2023 15:19:41 +0000
Subject: [PATCH] Remove LFS64 calls and set _FILE_OFFSET_BITS=64

Musl 1.2.4 made the LFS64 interfaces only available when
_LARGEFILE64_SOURCE is defined, and they will be removed altogether in
Musl 1.2.5. This commit replaces the LFS64 calls with their non-LFS64
versions and defines _FILE_OFFSET_BITS=64, which makes all interfaces
64-bit.

Bug: https://bugs.gentoo.org/905999
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,7 @@ target_compile_definitions(
     PUBLIC $<$<CONFIG:Debug>:TINYXML2_DEBUG>
     INTERFACE $<$<BOOL:${BUILD_SHARED_LIBS}>:TINYXML2_IMPORT>
     PRIVATE $<$<CXX_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS>
+    PUBLIC _FILE_OFFSET_BITS=64
 )
 
 set_target_properties(
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ ARFLAGS = cr
 RM = rm -f
 RANLIB = ranlib
 MKDIR = mkdir -p
-CXXFLAGS = -fPIC
+CXXFLAGS = -D_FILE_OFFSET_BITS=64 -fPIC
 
 INSTALL = install
 INSTALL_PROGRAM = $(INSTALL)
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -106,9 +106,6 @@ distribution.
 #elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__ANDROID__)
 	#define TIXML_FSEEK fseeko
 	#define TIXML_FTELL ftello
-#elif defined(__unix__) && defined(__x86_64__)
-	#define TIXML_FSEEK fseeko64
-	#define TIXML_FTELL ftello64
 #else
 	#define TIXML_FSEEK fseek
 	#define TIXML_FTELL ftell
-- 
2.41.0