installHeader not working with addModule and local .path dependency: C import failed, file not found

[actondev]

Zig Version

0.12.0

Steps to Reproduce and Observed Behavior

This is weird to describe, so I'm attaching a minimal reproduction project with a build.zig file. Even though in the passed -I generated directory the foo.h is there, the compilation fails
foo.zip

Another related issue that came up when doing the reproduction scenario is #19839 . In my own project where this issue came up when trying to upgrade to 0.12, apart from the missing header issue (which could be bypassed by hardcoding the header path to an absolute path), the compiler was just crashing. I hope that these 2 issues take care of the 0.12 issues I encountered. I also tried 0.13.0-dev.46+3648d7df1 but got the same results

Expected Behavior

Expecting the given project to compile with zig build

[ianprime0509]

This is a consequence of #18160: include paths (-I) are per-module now, so the clib library has to be linked to the binding module. If I change exe.linkLibrary(lib.artifact("foo")); to binding.linkLibrary(lib.artifact("foo"));, your example project builds for me (since binding is the module that's importing foo.h).

[actondev]

Oh, I see! Thank you so much!