https://bugs.gentoo.org/939020
https://github.com/evaleev/libint/pull/366

From 485aaae9e18e9ad3d0d43f20caf8f054ded9b80b Mon Sep 17 00:00:00 2001
From: Alfred Wingate <parona@protonmail.com>
Date: Mon, 28 Apr 2025 16:28:23 +0300
Subject: [PATCH] Include implicit cstdint

Gcc-15 and unreleased clang-21 don't implicitly include it anymore for
intptr_t.

https://gcc.gnu.org/gcc-15/porting_to.html#header-dep-changes

Bug: https://bugs.gentoo.org/939020
Signed-off-by: Alfred Wingate <parona@protonmail.com>
--- a/src/bin/libint/memory.h
+++ b/src/bin/libint/memory.h
@@ -21,6 +21,7 @@
 #include <limits.h>
 #include <smart_ptr.h>
 
+#include <cstdint>
 #include <list>
 
 #ifndef _libint2_src_bin_libint_memory_h_
-- 
2.49.0