https://github.com/kcat/openal-soft/pull/1292

From c625fdbf69be5d43f653fe9163bd81812338b401 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 4 Jun 2026 23:05:02 +0100
Subject: [PATCH] Add missing <fstream> include

GCC 17 shuffles around some internal transitive includes, so an explicit
<fstream> is needed now.
--- a/common/filesystem.h
+++ b/common/filesystem.h
@@ -60,6 +60,7 @@
 
 #ifdef GHC_USE_STD_FS
     #include <filesystem>
+    #include <fstream>
     namespace fs {
         using namespace std::filesystem;
         using ifstream = std::ifstream;