`-fallow-deprecated` not respected when compiling the build.zig runner executable

[castholm]

Zig Version

0.14.0-dev.3430+a2ab2fc98

Steps to Reproduce and Observed Behavior

The -f[no-]allow-deprecated command line options are not respected when compiling the build runner. This problem also extends to dependencies, which should have their respective build.zig modules inherit the selected option, or default to -fallow-deprecated when unspecified.

mkdir foo
cd foo
zig init

@@ -4,6 +4,7 @@ const std = @import("std");
 // declaratively construct a build graph that will be executed by an external
 // runner.
 pub fn build(b: *std.Build) void {
+    @deprecated();
     // Standard target options allows the person running `zig build` to choose
     // what target to build for. Here we do not override the defaults, which
     // means any target is allowed, and the default is native. Other options

zig build run -fallow-deprecated

C:\Projects\foo\build.zig:7:5: error: reached deprecated code     
    @deprecated();
    ^~~~~~~~~~~~~
referenced by:
    runBuild__anon_27536: C:\Projects\zig\lib\std\Build.zig:2429:33       
    main: C:\Projects\zig\lib\compiler\build_runner.zig:345:29
    4 reference(s) hidden; use '-freference-trace=6' to see all references

Expected Behavior

No compile error.

[castholm]

I am looking into fixing this as part of #22587.

[castholm]

@deprecated was reverted so this bug report is no longer relevant. However, the problems described should probably be addressed when #22822 is revived.

[andrewrk]

Thanks for doing the prompt investigation - it would have taken me a while to get around to it.