From 0db0ac301a44d8230ef8a7845fd8a2e37cf29bdb Mon Sep 17 00:00:00 2001
From: David McFarland <corngood@gmail.com>
Date: Tue, 9 Sep 2025 14:00:49 -0300
Subject: [PATCH] gcc: fix cross-win32 build of libstdc++

---
 pkgs/development/compilers/gcc/patches/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/compilers/gcc/patches/default.nix b/pkgs/development/compilers/gcc/patches/default.nix
index 92a7addecc2b..619b3a922f31 100644
--- a/pkgs/development/compilers/gcc/patches/default.nix
+++ b/pkgs/development/compilers/gcc/patches/default.nix
@@ -224,6 +224,12 @@ in
   .${majorVersion} or [ ]
 )
 
+++ optional (targetPlatform.isWindows || targetPlatform.isCygwin) (fetchpatch {
+  name = "libstdc-fix-compilation-in-freestanding-win32.patch";
+  url = "https://inbox.sourceware.org/gcc-patches/20250922182808.2599390-2-corngood@gmail.com/raw";
+  hash = "sha256-+EYW9lG8CviVX7RyNHp+iX+8BRHUjt5b07k940khbbY=";
+})
+
 ++ optionals targetPlatform.isCygwin [
   (fetchpatch {
     name = "cygwin-fix-compilation-with-inhibit_libc.patch";