Jane Xu be27dbf2b8 Enable CPP/CUDAExtension with py_limited_api for python agnosticism (#138088) ... Getting tested with ao, but now there is a real test i added. ## What does this PR do? We want to allow custom PyTorch extensions to be able to build one wheel for multiple Python versions, in other words, achieve python agnosticism. It turns out that there is such a way that setuptools/Python provides already! Namely, if the user promises to use only the Python limited API in their extension, they can pass in `py_limited_api` to their Extension class and to the bdist_wheel command (with a min python version) in order to build 1 wheel that will suffice across multiple Python versions. Sounds lovely! Why don't people do that already with PyTorch? Well 2 things. This workflow is hardly documented (even searching for python agnostic specifically does not reveal many answers) so I'd expect that people simply don't know about it. But even if they did, _PyTorch_ custom Extensions would still not work because we always link torch_python, which does not abide by py_limited_api rules. So this is where this PR comes in! We respect when the user specifies py_limited_api and skip linking torch_python under that condition, allowing users to enroll in the provided functionality I just described. ## How do I know this PR works? I manually tested my silly little ultra_norm locally (with `import python_agnostic`) and wrote a test case for the extension showing that - torch_python doesn't show up in the ldd tree - no Py- symbols show up It may be a little confusing that our test case is actually python-free (more clean than python-agnostic) but it is sufficient (and not necessary) towards showing that this change works. Pull Request resolved: https://github.com/pytorch/pytorch/pull/138088 Approved by: https://github.com/ezyang, https://github.com/albanD		2024-12-11 18:22:55 +00:00
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no_python_abi_suffix_test
open_registration_extension	Enable CPP/CUDAExtension with py_limited_api for python agnosticism (#138088)	2024-12-11 18:22:55 +00:00
python_agnostic_extension	Enable CPP/CUDAExtension with py_limited_api for python agnosticism (#138088)	2024-12-11 18:22:55 +00:00
self_compiler_include_dirs_test
torch_test_cpp_extension
cpp_c10d_extension.cpp
cpp_c10d_extension.hpp
cpp_frontend_extension.cpp
cublas_extension.cpp
cuda_dlink_extension.cpp
cuda_dlink_extension_add.cu
cuda_dlink_extension_add.cuh
cuda_dlink_extension_kernel.cu
cuda_extension.cpp
cuda_extension.cu
cuda_extension_kernel.cu
cuda_extension_kernel2.cu
cudnn_extension.cpp
cusolver_extension.cpp
dangling_impl_extension.cpp
doubler.h
extension.cpp
identity.cpp
jit_extension.cpp
jit_extension2.cpp
maia_extension.cpp
mps_extension.mm
mtia_extension.cpp	Make Context to be Device-agnostic Step by Step (1/N) (#136519) (#138155)	2024-10-17 20:58:56 +00:00
open_registration_extension.cpp
rng_extension.cpp
setup.py
torch_library.cu