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override_options : ['cython_language=cpp'] broken in master #14284
Description
Describe the bug
The SciPy test suite was broken (reported in scipy/scipy#22534), it looks by the options refactor. There are several test cases that exercise our Cython API by compiling Cython files using it in C and C++ modes. The test cases itself are complex, the error is::
ERROR: No specified compiler can handle file extending_cpp.cpython-313-x86_64-linux-gnu.so.p/extending_cpp.pyx.cpp
The problem seems to be that this construct is broken:
py.extension_module(..., override_options : ['cython_language=cpp'])This override_options case is covered in the docs (https://mesonbuild.com/Cython.html#c-intermediate-support), but not covered by test cases/cython.
To Reproduce
project('my project', 'cython', 'cpp')
py = import('python').find_installation(pure: false)
py.extension_module(
'foo',
'foo_cpp.pyx',
override_options : ['cython_language=cpp'],
)With foo_cpp.pyx contents:
def the_answer():
return 43Here added as a new test case: https://github.com/rgommers/meson/tree/cython-override-test
It currently fails:
% meson setup build
...
ERROR: No specified compiler can handle file foo.cpython-39-darwin.so.p/foo_cpp.pyx.cpp
Expected behavior
The build to succeed.
system parameters
- native build
- Linux and macOS (probably all platforms)
- Python 3.13.2
meson --version: 1.7.99, commit d995cbcninja --version: 1.12.1
Activity
Use override value when setting up Cython language.
jpakkane commentedon Feb 24, 2025
Can you test if the linked MR fixes this for you?
Use override value when setting up Cython language.
Use override value when setting up Cython language.
rgommers commentedon Feb 25, 2025
Yep, that fixes it!
Use override value when setting up Cython language.
Use override value when setting up Cython language.
Use override value when setting up Cython language.