Fail to load vulkan on mac

[rongcuid]

Template

• Version of vulkano: 0.32.0
• OS: Mac OS 13.1
• GPU (the selected PhysicalDevice): TODO
• GPU Driver: TODO
• Upload of a reasonably minimal complete main.rs file that demonstrates the issue: just use any example

Issue

When I try to run a Vulkano program, it fails to load Vulkan:

cargo run --bin basic-compute-shader
    Finished dev [unoptimized + debuginfo] target(s) in 0.06s
     Running `/Users/rongcuid/src/vulkano/target/debug/basic-compute-shader`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: LibraryLoadFailure(DlOpen { desc: "dlopen(libvulkan.1.dylib, 0x0005): tried: \'libvulkan.1.dylib\' (no such file), \'/System/Volumes/Preboot/Cryptexes/OSlibvulkan.1.dylib\' (no such file), \'/usr/lib/libvulkan.1.dylib\' (no such file, not in dyld cache), \'libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/src/vulkano/target/debug/build/shaderc-sys-d1970d87df1501e8/out/lib/libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/src/vulkano/target/debug/deps/libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/src/vulkano/target/debug/libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/lib/libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/.rustup/toolchains/stable-aarch64-apple-darwin/lib/libvulkan.1.dylib\' (no such file), \'/Users/rongcuid/lib/libvulkan.1.dylib\' (no such file), \'/usr/local/lib/libvulkan.1.dylib\' (no such file), \'/usr/lib/libvulkan.1.dylib\' (no such file, not in dyld cache)" })', examples/src/bin/basic-compute-shader.rs:36:40

The library is in fact under /opt/local/lib. I don't know why Vulkano doesn't load it, because I have tried using Vulkan in C and that program can load the library normally.

[rongcuid]

It was Macport's problem. I installed directly from the installer and it works. I guess it's your choice to see whether this installtion option should be considered as an additional case

[Rua]

I don't know anything about Macs. What in Vulkano's code would need to be changed?

[rongcuid]

Maybe Vulkano is not responsible for loading the library. Perhaps the issue is elsewhere, maybe Ash. I will give it a look later.

[Soth1985]

LunarG Vulkan SDK installs the libraries to the /usr/local/lib path which dlopen does not search in, to fix can just add it to search path in https://github.com/vulkano-rs/vulkano/blob/a1307b6ef8dbcf77c3479c56bd354de7bc297a2e/vulkano/src/library.rs

#[cfg(target_os = "macos")]
            fn get_paths() -> [&'static Path; 4] {
                [
                    Path::new("libvulkan.dylib"),
                    Path::new("libvulkan.1.dylib"),
                    Path::new("libMoltenVK.dylib"),
                    Path::new("/usr/local/lib/libMoltenVK.dylib"),
                ]
            }

[marc0246]

@Soth1985 I don't think absolute paths are the solution. When you install an application or libarary, it's supposed to be on the respective PATH so that it can be loaded by name.

[victor-rykov-playrix]

In RustRover setting environment variable also helps (exporting it to .profile .zprofile does not work)

[marc0246]

I can't believe what I'm reading. They mention in the SDK docs (the webside actively hates me trying to link to the specific heading, so scroll to "SDK System Paths" manually) that as of recent, macOS's dynamic linker no londer automatically searches in /usr/local/lib. They also mention that volk searches using the absolute path as a last resort and seemingly endorse that. So if that's how it is then I guess we should do the same.

[marc0246]

I implemented the above ^ in #2614.

[marc0246]

Closed as the original issue as described is not something that's planned, that being MoltenVK installed in ways other than what volk and/or Vulkan SDK does.