Do not append .lib extension to .res file on `cargo:rustc-link-lib=dylib=stuff.res`

[rodrigocfd]

In Windows, when trying to pass a compiled resource script to the linker (I have MSVC build tools properly installed), I'm using the following line in my build.rs:

println!("cargo:rustc-link-lib=dylib=stuff.res");

The problem is that stuff.res is being renamed to stuff.res.lib, and since this file does not exist, the build fails. If I manually rename my file to stuff.res.lib, then it works.

Is it possible to handle this situation, maybe by identifying the provided extension and letting .res to pass?

Note: this feature request originated from here.

[ehuss]

Transferred to rust-lang/rust repository. The naming convention is done by rustc. (Unfortunately I'm not familiar with compiled resource scripts, so I am uncertain on how they should be integrated.)

[petrochenkov]

I think rust-lang/rfcs#2951 (which is an accepted, but not yet implemented RFC) should help with this, through verbatim modifier specifically.

[petrochenkov]

Closing this issue, the verbatim modifier was implemented about 9 months ago, and #81490 tracks its stabilization.

[rodrigocfd]

@petrochenkov I just tried to link a .res file and it still didn't work.

Build script:

fn main() {
	println!("cargo:rustc-link-lib=dylib=resources/resources.res");
}

Error message:

error: linking with `link.exe` failed: exit code: 1181
  |
  = note: LINK : fatal error LNK1181: cannot open input file 'resources\resources.res.lib'

It's still searching for resources.res.lib, instead of simply using resources.res.

What am I missing?

[petrochenkov]

@rodrigocfd

What am I missing?

The +verbatim modifier, I guess?

println!("cargo:rustc-link-lib=dylib:+verbatim=resources/resources.res");

[rodrigocfd]

The +verbatim modifier, I guess?

Exactly that. It works now, thank you @petrochenkov.