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Update top-level Python project for CMake compatibility.

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This commit reimplements the (no longer recommended) setuptools based
build system using a standards-based in-tree PEP517 build backend.
The implementation is partially based on
  https://codeberg.org/ziglang/zig-pypi/src/branch/main/make_wheels.py
which is licensed under BSD-0-clause.

It also adds a new option `YOSYS_BUILD_PYTHON_ONLY` that is available
only if the binary or the library aren't going to be installed, which
turns off these targets entirely, as well as some dependent ones
(e.g. tests).

Co-authored-by: Mohamed Gaber <me@donn.website>
This commit is contained in:
Catherine 2026-05-27 07:58:18 +00:00
parent 780588f28c
commit afc0e78d11
15 changed files with 321 additions and 294 deletions
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16
cmake/FindPython3Embed.cmake
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@ -1,16 +0,0 @@
# Wrapper to improve behavior of `FindPython3` during cross-compilation.
# Does not entirely fix the problem; CMake 4.0 introduces `Python_ARTIFACTS_PREFIX`, which will.
# Stash the package found status
get_property(packages_found GLOBAL PROPERTY PACKAGES_FOUND)
get_property(packages_not_found GLOBAL PROPERTY PACKAGES_NOT_FOUND)
get_property(required_version GLOBAL PROPERTY _CMAKE_Python3_REQUIRED_VERSION)
# The `EXACT` specifier prevents the situation of `FindPython3` discovering a newer libpython-dev
# than the interpreter found in the past, rejecting it because it is too new, and giving up.
find_package(Python3 EXACT ${Python3_VERSION} COMPONENTS Development.Embed)
set(Python3Embed_FOUND ${Python3_Development.Embed_FOUND})
set_property(GLOBAL PROPERTY PACKAGES_FOUND "${packages_found}")
set_property(GLOBAL PROPERTY PACKAGES_NOT_FOUND "${packages_not_found}")
set_property(GLOBAL PROPERTY _CMAKE_Python3_REQUIRED_VERSION "${required_version}")