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P5.2: emit_object() -> string query primitive

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The compiler emits the sx object eagerly (the Zig driver, before the post-link
callback), so emit_object is a QUERY (not an action): it returns the path from
a new BuildConfig.object_path field main.zig forwards — no driver vtable. This
completes the build-pipeline QUERY primitives (emit_object / c_object_paths /
link_libraries); only link (the genuine action) remains for the vtable step.

Extended examples/1662 to also assert emit_object().len > 0. 703/0 both gates.
This commit is contained in:
agra
2026-06-19 07:58:59 +03:00
parent 44dfdcddf9
commit 83de0fa04d
8 changed files with 57 additions and 19 deletions
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11
examples/1662-platform-build-pipeline-queries.sx
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@@ -2,10 +2,11 @@
#import "modules/build.sx";
#import "modules/std/build.sx";
// P5.2 smoke test — the build-pipeline metadata queries (`c_object_paths` /
// `link_libraries`) run on the comptime VM and return a `List(string)` the VM
// builds in flat memory. Registered as a post-link callback (which runs on the
// VM — core.invokeByFuncId), so the lists are live there.
// P5.2 smoke test — the build-pipeline query primitives (`c_object_paths` /
// `link_libraries` / `emit_object`) run on the comptime VM: the list queries
// return a `List(string)` the VM builds in flat memory; `emit_object` returns
// the compiler-emitted object path. Registered as a post-link callback (which
// runs on the VM — core.invokeByFuncId), so the build state is live there.
//
// The `#import c` source compiles to one `.o`, so `c_object_paths()` must return
// a one-element list whose single string is the (non-empty) object path. AOT
@@ -21,6 +22,8 @@ c_marker :: () -> i64 extern;
check :: () -> bool abi(.compiler) {
objs := c_object_paths();
libs := link_libraries();
obj := emit_object(); // the compiler-emitted sx object path
if obj.len == 0 { return false; }
if objs.len != 1 { return false; }
if objs.items[0].len == 0 { return false; }
// `link_libraries` must be a well-formed (possibly empty) list — touch each