build: enable _GNU_SOURCE on GNU/Hurd#17975
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Unconditionally enable _GNU_SOURCE when building on GNU/Hurd; this way it is possible to properly use/rely on GNU extensions e.g. accept4(), memrchr(), and the GNU strerror_r().
bagder
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Jul 20, 2025
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Unconditionally enable
_GNU_SOURCEwhen building on GNU/Hurd; this way it is possible to properly use/rely on GNU extensions e.g.accept4(),memrchr(), and the GNUstrerror_r().