From c46e5e5e5f4d5ac40c0bc65dab39e1a73cfaf72b Mon Sep 17 00:00:00 2001
From: Gaetan Lepage <gaetan@glepage.com>
Date: Wed, 21 Jan 2026 14:32:12 +0000
Subject: [PATCH] python3Packages.executorch: fix build with GCC 15

Tracking: https://github.com/NixOS/nixpkgs/issues/475479
---
 pkgs/development/python-modules/executorch/default.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/development/python-modules/executorch/default.nix b/pkgs/development/python-modules/executorch/default.nix
index 0ffade9dc6b9..faf18e94ed5d 100644
--- a/pkgs/development/python-modules/executorch/default.nix
+++ b/pkgs/development/python-modules/executorch/default.nix
@@ -85,6 +85,15 @@ buildPythonPackage (finalAttrs: {
         --replace-fail \
           "CMAKE_MINIMUM_REQUIRED(VERSION 3.5 FATAL_ERROR)" \
           "CMAKE_MINIMUM_REQUIRED(VERSION 3.10 FATAL_ERROR)"
+    ''
+    # Fix build with GCC>=15
+    + ''
+      substituteInPlace third-party/flatcc/include/flatcc/portable/grisu3_print.h \
+        --replace-fail \
+          'static char hexdigits[16] = "0123456789ABCDEF";' \
+          'static char hexdigits[17] = "0123456789ABCDEF";'
+
+      sed -i "1i #include <cstdint>" backends/apple/coreml/runtime/inmemoryfs/memory_buffer.hpp
     '';
 
   env = {