From 586634ae00c55b8c1d907218c29108b186af4376 Mon Sep 17 00:00:00 2001
From: "A. Jiang" <de34@live.cn>
Date: Thu, 17 Sep 2026 14:46:19 +0800
Subject: [PATCH] Add GCC/libstdc++ 17 support for P3391

- https://github.com/gcc-mirror/gcc/commit/5ce76a8adbc008fa11281ae996eb8fd40353f601
- https://github.com/gcc-mirror/gcc/commit/42f9bf2e3c56ae67166b19499d3de74e42a60b73
---
 features_cpp26.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/features_cpp26.yaml b/features_cpp26.yaml
index 67541f9..1c1fca7 100644
--- a/features_cpp26.yaml
+++ b/features_cpp26.yaml
@@ -1686,6 +1686,7 @@ features:
     paper: P3391
     summary: "`std::format()` can now be used at compile time."
     lib: true
+    support: [GCC 17]
     ftm:
       - name: __cpp_lib_constexpr_format
         value: 202511L