From 1a0d6a38028eba6dd3c04fcd51817879834ba340 Mon Sep 17 00:00:00 2001
From: "M. Chornyi" <99709299+mc-nv@users.noreply.github.com>
Date: Wed, 9 Sep 2026 20:46:53 +0000
Subject: [PATCH] build: Update C++ standard from c++17 to c++20

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
---
 CMakeLists.txt         | 6 +++---
 src/c++/CMakeLists.txt | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76c12ae2f..e56c72897 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,10 +28,10 @@ cmake_minimum_required(VERSION 3.31.8)
 
 project(tritonclient 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.")
 
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 #
diff --git a/src/c++/CMakeLists.txt b/src/c++/CMakeLists.txt
index bd529c1b4..5c6e0d70a 100644
--- a/src/c++/CMakeLists.txt
+++ b/src/c++/CMakeLists.txt
@@ -28,10 +28,10 @@ cmake_minimum_required(VERSION 3.31.8)
 
 project(cc-clients 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.")
 
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_POLICY_VERSION_MINIMUM 3.5)