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ffi 0.7: #import c { #include / #source } via stdlib-path resolution

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94/94 regression tests pass (+ffi-07-c-import-block).

Companion C helper lives only at
`library/vendors/sx_ffi_resolve_test/`. Critically NOT in
`sx/vendors/` (the sx repo root) and NOT in the importing
example's directory — so the `vendors/...` paths in this
example are findable solely via the stdlib search branch
(`<exe>/../../library`, `<exe>/../library`, `<exe>/library`).

That branch is the one the JNI insets bridge needs to reach
`library/vendors/sx_android_jni/sx_android_jni.c` without
forcing chess (or any consumer) to vendor an identically-named
copy. The test pins the resolution end-to-end:
  - #include  resolves; clang parses the .h; c_import.zig
    synthesizes #foreign fn decls for `sx_ffi_resolve_test_add` /
    `_mul`.
  - #source   resolves; the .c is compiled into the build's
    object list.
  - sx calls the synthesized decls and prints results.
This commit is contained in:
agra
2026-05-19 11:51:34 +03:00
parent 43a30e727d
commit c08a749043
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25
examples/ffi-07-c-import-block.sx Normal file
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// Phase 0 baseline (PLAN-FFI.md step 0.7): `#import c { #include /
// #source }` end-to-end, with the new stdlib-path resolution
// (src/imports.zig added this session). The header + .c live ONLY
// under `library/vendors/sx_ffi_resolve_test/` — not the sx repo
// root vendors/ — so the path can be found only by the stdlib
// search branch (`<exe>/../../library` etc.), not by the CWD or
// importing-file's-dir branches.
//
// `#include` triggers c_import.zig's auto-synthesis of `#foreign`
// fn decls from the C header; `#source` adds the .c to the build's
// object list. Together they let the sx side call the C functions
// by their declared names with no manual decls.
#import "modules/std.sx";
#import c {
#include "vendors/sx_ffi_resolve_test/sx_ffi_resolve_test.h";
#source "vendors/sx_ffi_resolve_test/sx_ffi_resolve_test.c";
};
main :: () -> s32 {
print("add(3, 4) = {}\n", sx_ffi_resolve_test_add(3, 4));
print("mul(6, 7) = {}\n", sx_ffi_resolve_test_mul(6, 7));
0;
}