https://github.com/flightlessmango/MangoHud/pull/1884

From 8c8d0c6d2f45f8b2fbdfd3685a88b52a6963c203 Mon Sep 17 00:00:00 2001
From: Alfred Wingate <parona@protonmail.com>
Date: Mon, 1 Dec 2025 18:17:36 +0200
Subject: [PATCH] gpu_fdinfo: add missing implicit sstream header include
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It's not implicit in gcc-16 anymore.

../src/gpu_fdinfo.cpp: In member function ‘void GPU_fdinfo::get_current_hwmon_readings()’:
../src/gpu_fdinfo.cpp:287:27: error: aggregate ‘std::stringstream ss’ has incomplete type and cannot be defined
  287 |         std::stringstream ss;
      |

Signed-off-by: Alfred Wingate <parona@protonmail.com>
--- a/src/gpu_fdinfo.h
+++ b/src/gpu_fdinfo.h
@@ -11,6 +11,7 @@
 #include <map>
 #include <set>
 #include <regex>
+#include <sstream>
 
 #ifdef TEST_ONLY
 #include <../src/mesa/util/os_time.h>
-- 
2.52.0