gh-154271: Define _XOPEN_SOURCE=600 on Solaris to enable socket ancillary data and forkserver#154273
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gh-154271: Define _XOPEN_SOURCE=600 on Solaris to enable socket ancillary data and forkserver#154273serhiy-storchaka wants to merge 1 commit into
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… ancillary data and forkserver Solaris declares the socket ancillary-data API (CMSG_*, sendmsg(), recvmsg()) only under _XOPEN_SOURCE >= 600. __EXTENSIONS__ keeps the other platform features. This enables the forkserver start method. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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@kulikjak, could you please look at this and verify if it is a correct change for real Solaris? |
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On Solaris/illumos the X/Open socket ancillary-data API (
CMSG_*,sendmsg(),recvmsg()) is declared only under_XOPEN_SOURCE>=600, butconfigure.acleft it undefined there (historically because it hides other features — gh-57208, bpo-1759169). So the socket module built withoutsendmsg/recvmsg, makingmultiprocessing.reduction.HAVE_SEND_HANDLEFalse and theforkserverstart method unavailable.Define
_XOPEN_SOURCE=600on Solaris;__EXTENSIONS__(fromAC_USE_SYSTEM_EXTENSIONS) re-enables the platform features it would otherwise hide — the same combination the OpenIndiana system Python builds with. Verified on OpenIndiana (illumos):sendmsg/recvmsg/CMSG_*are built, forkserver becomes available, full build clean, andtest_socket/test_multiprocessing_forkserver/test_concurrent_futurespass.Related: GH-154272 (test-robustness fix for platforms that genuinely lack forkserver).
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