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luhenry
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Sep 8, 2026
pylibmc binds libmemcached, which has no riscv64 devel package available (EPEL is absent for this arch, and Rocky 10's own repos carry no libmemcached-devel at all). Build libmemcached-awesome, the maintained header/API/SONAME-compatible fork, from source in CIBW_BEFORE_ALL instead, and package its BSD-3-Clause licence text alongside pylibmc's own since auditwheel vendors the resulting libmemcached.so into the wheel.
CIBW_BEFORE_ALL_LINUX runs inside the manylinux container via sh -c, which does not inherit the job's plain env: vars -- only what CIBW_ENVIRONMENT passes through. LIBMEMCACHED_VERSION was unset there, so the download URL collapsed to .../tags/.tar.gz and 404'd.
src/libmemcached/CMakeLists.txt calls flex_target() to generate the CSL scanner (csl/scanner.l); bison ships in the manylinux image already but flex does not, so FindFLEX never defines the command and configure fails with 'Unknown CMake command flex_target'.
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pylibmc1.6.3C extension binding libmemcached, a client library for memcached. Upstream publishes no riscv64 wheel.
Mirrors upstream's
cd.ymlcibuildwheel build.Differs from upstream
CIBW_BEFORE_ALL- Rocky 10 has nolibmemcached-develfor riscv64 (no EPEL), unlike upstream'syum install.Testing
runtests.py-equivalentpytest tests), against a realmemcachedserver started inCIBW_BEFORE_TEST.License: Wheel bundles libmemcached-awesome (BSD-3-Clause); upstream ships no licence text for it, so the build adds one.
Not yet build-tested locally this session (no working container runtime available); relies on the
pull_requestCI run for the actual riscv64 build/test/publish-dry-run verification.