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build: enable building with the limited API - #326
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oscarbenjamin merged 1 commit intoSep 9, 2025
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Cython 3.1 makes it possible to build with the limited API. This adds the necessary build configuration so that python-flint can be built with the limited API which in principle makes it possible to have abi3 wheels that can work with a range of CPython versions. Although this builds the tests crash pretty quickly in a segfault so more work would be needed to make these builds useful. For now we just enable this as an experimental build mode. When it is working it would be worth running some timings to see if it is slower than a normal build.
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September 9, 2025 16:05
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The limited API build does not work right now: $ rm -r build build-install/
$ meson setup build -Dpython.allow_limited_api=true
$ spin test
...
build-install/usr/local/lib/python3.13/site-packages/flint/test/test_all.py Fatal Python error: Segmentation fault
$ spin run python -m flint.test
...
Running tests...
test_pyflint...
(segfault)The segfault is pretty immediate: In [1]: import flint
In [2]: flint.fmpz() == flint.fmpz(0)
Segmentation fault (core dumped)I'm not sure if that is something that can be fixed in python-flint or just a bug in Cython though. For now we can merge the build option for further testing though. |
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Cython 3.1 makes it possible to build with the limited API. This adds the necessary build configuration so that python-flint can be built with the limited API which in principle makes it possible to have abi3 wheels that can work with a range of CPython versions.
Although this builds the tests crash pretty quickly in a segfault so more work would be needed to make these builds useful. For now we just enable this as an experimental build mode. When it is working it would be worth running some timings to see if it is slower than a normal build.