feat: xlings 作为运行时底座 —— subos 环境到达程序 + self-contained 的 /proc/self/exe 陷阱 (#352, #375) (2026.8.8.1) - #376

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feat/xlings-runtime-substrate

Aug 7, 2026

Commits on Aug 7, 2026

docs: xlings as mcpp's runtime substrate — design and implementation plan
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fix(pack): the self-contained wrapper broke /proc/self/exe and never said so
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docs: retract the c_runtime axis — it answered the reporter's method, not their problem
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feat(xlings): read the subos's own description instead of inferring it
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feat(run): a program mcpp launches gets its subos's environment
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docs: three ways to ship, none of which uses the host's libc
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chore: 2026.8.8.1, and track xlings 2026.8.7.1
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fix(run): the cached fast path dropped the subos environment
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fix(xlings): the env list separator is the platform's, not a literal ':'
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fix(xlings): drop a ranges spelling that crashed the clang 20 frontend
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