non-deterministic zls_gen

[bmwiedemann]

Zig Version

0.13.0

ZLS Version

0.13.0

Client / Code Editor / Extensions

No response

Steps to Reproduce and Observed Behavior

build zls twice (from scratch) with debuginfo enabled

Builds embed a random path from

- /home/abuild/rpmbuild/BUILD/zls-0.13.0/zig-cache/o/1c703156d1c748dd822850009e362839/zls_gen --generate-version-data 0.13.0 --langref_path /usr/share/doc/packages/zig/langref.html --generate-version-data-path /home/abuild/rpmbuild/BUILD/zls-0.13.0/zig-cache/o/e9fa9483a7e7709690e1a2c451e3f26d/version_data_0.13.0.zig
+ /home/abuild/rpmbuild/BUILD/zls-0.13.0/zig-cache/o/a584116cfed34531fa759dd6d5a6e146/zls_gen --generate-version-data 0.13.0 --langref_path /usr/share/doc/packages/zig/langref.html --generate-version-data-path /home/abuild/rpmbuild/BUILD/zls-0.13.0/zig-cache/o/3467172f659a38bcf17b0fa61da120b0/version_data_0.13.0.zig

into debuginfo, which makes the main binary vary as well in the debug-link info.

Expected Behavior

Builds should produce two bit-identical binaries

Relevant log output

No response

[Techatrix]

This has already been fixed by #2000. Also note that Zig does not guarantee reproducible debug builds.

[bmwiedemann]

Via ziglang/zig#22663 I found that this is probably not fixed by #2000 but this patch helped:

--- a/build.zig
+++ b/build.zig
@@ -88,7 +88,9 @@ pub fn build(b: *Build) !void {
     const gen_exe = b.addExecutable(.{
         .name = "zls_gen",
         .root_source_file = b.path("src/config_gen/config_gen.zig"),
-        .target = b.host,
+        .target = b.resolveTargetQuery(.{
+            .cpu_model = .baseline,
+        }),
         .single_threaded = true,
     });

zig might get a toolchain patch to make results reproducible without.