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PyTorch -> C++17 (#98209) (#100557)

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This pull request updates the codebase and the documentation to use C++17 instead of C++14 as the minimum required C++ standard. This affects the `ATen`, `c10`, and `torch` libraries and their dependencies, as well as the CI system and the `conda` package metadata.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/100557
Approved by: https://github.com/malfet
This commit is contained in:
Richard Barnes
2023-05-19 00:49:08 +00:00
committed by PyTorch MergeBot
parent 6f13d6892a
commit bcb4444cec
7 changed files with 14 additions and 14 deletions
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2
aten/conda/meta.yaml
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@ -26,7 +26,7 @@ requirements:
about:
home: https://github.com/pytorch/pytorch
license: BSD
summary: A TENsor library for C++14
summary: A TENsor library for C++17
extra:
recipe-maintainers:

4
aten/src/ATen/ATen.h
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@ -1,7 +1,7 @@
#pragma once
#if !defined(_MSC_VER) && __cplusplus < 201402L
#error C++14 or later compatible compiler is required to use ATen.
#if !defined(_MSC_VER) && __cplusplus < 201703L
#error C++17 or later compatible compiler is required to use ATen.
#endif
#include <ATen/Context.h>

6
aten/src/ATen/cpu/tbb/CMakeLists.txt
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@ -121,9 +121,9 @@ endif()
if(UNIX)
add_definitions(-DUSE_PTHREAD)
check_cxx_compiler_flag("-std=c++14" SUPPORTS_STDCXX14)
if(SUPPORTS_STDCXX14)
set(CMAKE_CXX_FLAGS "-std=c++14 ${CMAKE_CXX_FLAGS}")
check_cxx_compiler_flag("-std=c++17" SUPPORTS_STDCXX17)
if(SUPPORTS_STDCXX17)
set(CMAKE_CXX_FLAGS "-std=c++17 ${CMAKE_CXX_FLAGS}")
endif()
check_cxx_compiler_flag("-mrtm -Werror" SUPPORTS_MRTM)

4
aten/src/ATen/test/test_install/CMakeLists.txt
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@ -2,9 +2,9 @@ cmake_minimum_required(VERSION 3.0)
find_package(ATen REQUIRED)
include_directories(${ATEN_INCLUDE_DIR})
# C++14
# C++17
if(not MSVC)
set(CMAKE_CXX_FLAGS "--std=c++14 ${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "--std=c++17 ${CMAKE_CXX_FLAGS}")
endif()
add_executable(main main.cpp)
target_link_libraries(main ${ATEN_LIBRARIES})

6
c10/util/C++17.h
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@ -22,9 +22,9 @@
"You're trying to build PyTorch with a too old version of Clang. We need Clang 4 or later."
#endif
#if (defined(_MSC_VER) && (!defined(_MSVC_LANG) || _MSVC_LANG < 201402L)) || \
(!defined(_MSC_VER) && __cplusplus < 201402L)
#error You need C++14 to compile PyTorch
#if (defined(_MSC_VER) && (!defined(_MSVC_LANG) || _MSVC_LANG < 201703L)) || \
(!defined(_MSC_VER) && __cplusplus < 201703L)
#error You need C++17 to compile PyTorch
#endif
#if defined(_WIN32) && (defined(min) || defined(max))

2
caffe2/contrib/aten/README.md
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@ -1,7 +1,7 @@
# An ATen operator for Caffe2
ATen is a simple tensor library thats exposes the Tensor operations in Torch
and PyTorch directly in C++14. This library provides a generated wrapper around the ATen API
and PyTorch directly in C++17. This library provides a generated wrapper around the ATen API
that makes these functions available in Caffe2 as an operator. It also makes it accessible using the
ToffeeIR.

4
torch/csrc/api/include/torch/all.h
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@ -1,7 +1,7 @@
#pragma once
#if !defined(_MSC_VER) && __cplusplus < 201402L
#error C++14 or later compatible compiler is required to use PyTorch.
#if !defined(_MSC_VER) && __cplusplus < 201703L
#error C++17 or later compatible compiler is required to use PyTorch.
#endif
#include <torch/autograd.h>