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Title: gh-151422: Don't link libffi into _ctypes_test.so by hoodmane · Pull Request #151423 · python/cpython · GitHub

Open Graph Title: gh-151422: Don't link libffi into _ctypes_test.so by hoodmane · Pull Request #151423 · python/cpython

X Title: gh-151422: Don't link libffi into _ctypes_test.so by hoodmane · Pull Request #151423 · python/cpython

Description: Minor build fix. This makes the ctypes tests run on Emscripten. There is a bug in the Emscripten dynamic loader that caused any dynamic library that links libffi to fail to load. _ctypes_test.so unnecessarily links libffi so it would fail to load and tests that needed it were skipped. There are two test failures behind that: one involving stack overflows which we have to skip as usual, and one that assumes that the abi for a function that takes a single struct with two doubles is the same as the abi for a function that takes two double arguments. This is not true in webassembly so we skip the test. Issue: gh-151422

Open Graph Description: Minor build fix. This makes the ctypes tests run on Emscripten. There is a bug in the Emscripten dynamic loader that caused any dynamic library that links libffi to fail to load. _ctypes_test.so un...

X Description: Minor build fix. This makes the ctypes tests run on Emscripten. There is a bug in the Emscripten dynamic loader that caused any dynamic library that links libffi to fail to load. _ctypes_test.so un...

Opengraph URL: https://github.com/python/cpython/pull/151423

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0011b4e gh-151422: Don't link libffi into _ctypes_test.so hoodmane Jun 12, 2026 https://github.com/python/cpython/pull/151423/commits/0011b4e1160c42904852c2676eb42cebf98590c3
4fb91c5 Add test skips for ctypes tests that don't work on emscripten hoodmane Jun 13, 2026 https://github.com/python/cpython/pull/151423/commits/4fb91c5c8b840a475065c22de25c31d371dc7034
b4eac76 Use skipIf decorator hoodmane Jun 15, 2026 https://github.com/python/cpython/pull/151423/commits/b4eac7642b0f494d4e81ac2e84104fb0ae7f2d4f
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