gh-154271: Define _XOPEN_SOURCE=600 on Solaris to enable socket ancillary data and forkserver#154273

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Commits on Jul 20, 2026

gh-154271: Define _XOPEN_SOURCE=600 on Solaris to enable socket ancillary data and forkserver

serhiy-storchaka
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claude
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Commits on Jul 22, 2026

Merge remote-tracking branch 'upstream/main' into solaris-xopen-source
serhiy-storchaka
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Define _XOPEN_SOURCE in a single place and mention illumos

serhiy-storchaka
and
claude
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