From b4d6bdd91b77ce43fc8ba496bcf257d083fc92ea Mon Sep 17 00:00:00 2001
From: Misha Chornyi <99709299+mc-nv@users.noreply.github.com>
Date: Thu, 10 Sep 2026 20:15:08 -0700
Subject: [PATCH] build: Update C++ standard from c++17 to c++20 (#455)

Upstream PyTorch raised ATen's minimum required C++ standard from 17
to 20 (pytorch/pytorch#178150), which broke the pytorch_backend build.
Align this repo's TRITON_MIN_CXX_STANDARD/CMAKE_CXX_STANDARD default
with that floor for consistency across the stack.

TRI-1877

(cherry picked from commit 26764b963940c48b35c004992061b77b4e0a3d2d)
---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d0bcdfed..f9956f2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,8 +28,8 @@ cmake_minimum_required(VERSION 3.31.8)
 
 project(tritonpythonbackend LANGUAGES C CXX)
 
-# Use C++17 standard as Triton's minimum required.
-set(TRITON_MIN_CXX_STANDARD 17 CACHE STRING "The minimum C++ standard which features are requested to build this target.")
+# Use C++20 standard as Triton's minimum required.
+set(TRITON_MIN_CXX_STANDARD 20 CACHE STRING "The minimum C++ standard which features are requested to build this target.")
 
 #
 # Options