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build: Update C++ standard from c++17 to c++20 #210

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b087c80
build: Update C++ standard from c++17 to c++20
mc-nv Sep 9, 2026
fa172d8
fix: raise stale cached TRITON_MIN_CXX_STANDARD to the new C++20 floor
mc-nv Sep 10, 2026
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11 changes: 9 additions & 2 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,15 @@ cmake_minimum_required (VERSION 3.31.8)

project(tritonpytorchbackend 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.
# A stale CMake cache from a build tree configured before this bump would
# otherwise keep TRITON_MIN_CXX_STANDARD at its old cached value, so raise it
# to the new floor while still allowing a user to cache a higher override.
if(DEFINED TRITON_MIN_CXX_STANDARD AND TRITON_MIN_CXX_STANDARD LESS 20)
set(TRITON_MIN_CXX_STANDARD 20 CACHE STRING "The minimum C++ standard which features are requested to build this target." FORCE)
else()
set(TRITON_MIN_CXX_STANDARD 20 CACHE STRING "The minimum C++ standard which features are requested to build this target.")
endif()

#
# Options
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