[Sunrisepeak]

compat.mimalloc 3.6.1, beside 3.4.5.

• One source list names both layouts: 3.6.1 splits the library into alloc/, arena/, heap/, prim/, profile/ and util/, and adds three units under profile/. A name absent from a release's tree selects nothing there. The list is upstream's mi_sources for each release.
• -D_DEFAULT_SOURCE for every unit: upstream builds as gnu11, this recipe as c11. In 3.6.1 prim/prim.c includes headers before prim/unix/prim.c states _DEFAULT_SOURCE, so syscall and madvise were undeclared.
• The mimalloc test member moves to 3.6.1. 3.4.5 was rebuilt locally with the same list and its test passes.
• GLOBAL is the GitHub tag archive, CN the GitCode mcpp-res mirror; the sha256 matches at both.

openkal-musl 0.26 embeds this version as its default allocator (mcpp design 2026-11-02 part 3, §7.1).

Co-authored-by: speak-agent 248744407+speak-agent@users.noreply.github.com