OSX / Catalina..

[fairbairn]

Base code compiles fine under rust, however when linking, it cannot resolve the NDI related references.

Installing the NDI SDK for Mac provides their libndi.4.dylib for x64 but not as a statically linkable option.

I've tried setting LIBRARY_PATH, moving the dylib around, but I feel the compilation is likely looking for a static library to link with.

Any hints on how this might be compiled to work on Mac?

[sdroege]

The library needs to be in the library search path used by rustc. You can set this via RUSTFLAGS="-L=/some/path before compiling.

[Townsheriff]

I managed to make it compile by adding these lines to build.rs:

println!("cargo:rustc-link-lib=dylib=ndi");
println!("cargo:rustc-link-search=native=/System/Volumes/Data/Library/NDI SDK for Apple/lib/x64");

dynlib in /System/Volumes/Data/Library/NDI SDK for Apple/lib/x64 was called libndi.4.dynlib I renamed it to libndi.dynlib othewise it could not be found.

At this point I was able to compile.

Then I got runtime errors: Library not loaded: @rpath/libndi.4.dylib and to fix that I used install_name_tool -change @rpath/libndi.4.dylib "/System/Volumes/Data/Library/NDI_SDK_COPY/lib/x64/libndi.dylib" target/debug/libgstndi.dylib

And now I have no errors.

As for RUSTFLAGS="-L=/some/path did not work, I think there is a typo also ("=" should be removed), but not an expert on this.

[sdroege]

It would be useful to add something to the build.rs for setting this up automatically somehow for the different platforms.

[zevarito]

I've made it work like this, in both Mac & Linux:

RUSTFLAGS="-C link-args=-Wl,-rpath,/path-to-lib -L /path-to-lib -lndi"

[normen]

The solution of @Townsheriff was the only one that worked for me to compile on mac. With the NDI SDK v5 the paths are slightly different (/Library/NDI SDK for macOS/lib/macOS) but the dylib is called libndi.dylib right out of the box. Still had to do the install_name_tool step though.

[fairbairn]

With NDI 5, clean pull, my build.rs ended up as @Townsheriff suggested, and it compiled..

fn main() {
    gst_plugin_version_helper::info();
    println!("cargo:rustc-link-lib=dylib=ndi");
    println!("cargo:rustc-link-search=native=/System/Volumes/Data/Library/NDI SDK for Apple/lib/x64");
}