831b46ac35
97/97 regression tests pass (94 expected updated; +issue-0037 from the prior commit). The companion `94-foreign-global-helper.sx` ALSO declares `__stdinp : *void #foreign;`. Two sx files referencing the same extern symbol must link cleanly — LLVM dedupes the named global at the module level, and the C linker resolves both refs to the one libSystem definition. The full ergonomic story (helper computes the *same* address as the main file's direct read) is blocked on issue-0037: lower.zig's `address_of(global)` branch produces `undef` when the body is a non-main function, even single-file. Once issue-0037 closes, fold the helper's address back into an equality check here. The cross-file link itself works today and is the lemma we're locking in. This is also the closest thing today to the cross-file extern-global ergonomic issue-0030 wants — `#foreign` already works across files; the missing piece is sx-side `extern` decls for sx-defined globals.
14 lines
520 B
Plaintext
14 lines
520 B
Plaintext
// Companion module for examples/94-foreign-global.sx (PLAN-FFI 0.10).
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// Declares the same `#foreign` extern global as the main file; the
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// linker should treat both decls as one symbol. We deliberately don't
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// READ `@__stdinp` from inside a helper fn body — that path is busted
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// today (see examples/issue-0037.sx) — we just expose a trivial fn so
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// this file participates in the link and the cross-file decl
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// coexistence is exercised.
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__stdinp : *void #foreign;
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stdinp_addr_present :: () -> s32 {
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1;
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}
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