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Migrate PyTorch to C++17 (#85969)

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With CUDA-10.2 gone we can finally do it!

This PR mostly contains build system related changes, invasive functional ones are to be followed.
Among many expected tweaks to the build system, here are few unexpected ones:
 - Force onnx_proto project to be updated to C++17 to avoid `duplicate symbols` error when compiled by gcc-7.5.0, as storage rule for `constexpr` changed in C++17, but gcc does not seem to follow it
 - Do not use `std::apply` on CUDA but rely on the built-in variant, as it results in test failures when CUDA runtime picks host rather than device function when `std::apply` is invoked from CUDA code.
 - `std::decay_t` -> `::std::decay_t` and `std::move`->`::std::move` as VC++ for some reason claims that `std` symbol is ambigious
 - Disable use of `std::aligned_alloc` on Android, as its `libc++` does not implement it.

Some prerequisites:
 - https://github.com/pytorch/pytorch/pull/89297
 - https://github.com/pytorch/pytorch/pull/89605
 - https://github.com/pytorch/pytorch/pull/90228
 - https://github.com/pytorch/pytorch/pull/90389
 - https://github.com/pytorch/pytorch/pull/90379
 - https://github.com/pytorch/pytorch/pull/89570
 - https://github.com/facebookincubator/gloo/pull/336
 - https://github.com/facebookincubator/gloo/pull/343
 - 919676fb32

Fixes https://github.com/pytorch/pytorch/issues/56055

Pull Request resolved: https://github.com/pytorch/pytorch/pull/85969
Approved by: https://github.com/ezyang, https://github.com/kulinseth
This commit is contained in:
Nikita Shulga
2022-12-08 02:27:48 +00:00
committed by PyTorch MergeBot
parent f2d95765e4
commit 36ac095ff8
27 changed files with 66 additions and 51 deletions
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2
android/pytorch_android/CMakeLists.txt
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@ -14,7 +14,7 @@ endif()
include(GNUInstallDirs)
set(CMAKE_CXX_STANDARD 14 CACHE STRING "The C++ standard whose features are requested to build this target.")
set(CMAKE_CXX_STANDARD 17 CACHE STRING "The C++ standard whose features are requested to build this target.")
set(CMAKE_VERBOSE_MAKEFILE ON)
message(STATUS "ANDROID_STL:${ANDROID_STL}")