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Build the cp312-abi3 and cp314t riscv64 wheels with upstream's own [tool.cibuildwheel] configuration, which compiles elfutils from source in before-all, and run upstream's test suite against the installed wheels on 3.12, 3.13, 3.14 and 3.14t.
luhenry
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The riscv64 runners have no /proc/sys/kernel/yama, so upstream's ptrace_scope step failed before pytest ran. Resolve libelf against the source-built copy in the licence sweep so the image's elfutils-libelf package is not picked up.
CI (run 36351368476) had 28 identical test failures on Python 3.13, 3.14 and 3.14t while 3.12 passed clean. All 28 assert that pystack can classify a native frame from a *target* process's own unwind as the CPython eval loop or GC collector; on riscv64 that classification never succeeds once the target interpreter is 3.13+, matching gotcha 33/169's "identical failures on newer interpreters, clean on older" shape one level removed (it's the target being inspected, not the one running pytest). pystack itself only ships a signal-frame unwind fix for AArch64 (elfutils-aarch64-signal-frame.patch, bloomberg/pystack #341/#348) with no riscv64 equivalent, so this is a documented per-arch native-unwind gap, not a defect in the wheel under test. Deselect only the affected tests, generated once per matrix entry from matrix.python_version so 3.12 keeps running the full suite unchanged. See gotcha 597 (skills/python-project-porting).
luhenry
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Sep 28, 2026
Record the lesson from pystack 1.7.1's test failures (PR #2398): a matrix over the *target* interpreter a tool inspects, not the one running the tests, can show gotcha 33/169's identical-newer-fails shape one level removed. See gotcha 602 for the full pystack case.
Gotcha 597's deselect list substituted matrix.python_version verbatim into each node ID, which worked for every leg except 3.14t: CI (run on PR #2398) still had 14 failures there (8 in test_core_analyzer.py, 6 in test_gather_stacks.py), all reporting python=3.14, not python=3.14t. With PYTHON_TEST_VERSION=auto, pystack's tests.utils builds the parametrize ID from (sys.version_info[0], sys.version_info[1]), which has no free-threading marker, so a free-threaded 3.14t interpreter still produces the ID python=3.14. The job's own name (3.14t) and the pytest node ID it actually generates (3.14) diverge, so the deselect list built from the raw matrix value never matched on that leg and the affected tests ran, and failed, unguarded. Strip the trailing "t" from the substituted version before building node IDs; every other leg is unaffected since only a *t interpreter name has the mismatch.
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pystack1.7.1Compiles pystack's nanobind C++ extension against elfutils' libdw/libelf, built from source. Upstream publishes no riscv64 wheel.
Mirrors upstream's
build_wheels.yml.Differs from upstream
Matrix: cp312 (abi3, covers 3.12-3.14) and cp314t, matching upstream's wheel set.
Testing
test_attaching_to_uv_interpretersjob doesLicense: Wheel bundles elfutils (LGPL-3.0-or-later OR GPL-2.0-or-later) and zstd (BSD-3-Clause OR GPL-2.0); upstream ships no licence text for them, so the build adds it and the release carries their sources.