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I'm new to Rust development under Windows.

I'm trying to bindgen a library, libk4a, on both windows and linux.On linux it is installed as libk4a, under the usual places, /usr/local/include/k4a/k4a.h and /usr/local/lib/libk4a.so.

I've followed the bindgen book's example and have made a wrapper.h to pass to build.rs, which is simply:

#include <k4a/k4a.h>

This works fine under linux with the build.rs setting of 

println!("cargo:rustc-link-lib=k4a");

On windows, the dll is under C:\Program Files\Azure Kinect SDK v1.3.0\sdk\windows-desktop\amd64\release\bin\ and the header at C:\Program Files\Azure Kinect SDK v1.3.0\sdk\include\k4a\k4a.h

While I'm able to run bindgen on its own with 

bindgen wrapper.h -- -I "C:\Program Files\Azure Kinect SDK v1.3.0\sdk\include"

If it try to add the include path in my build.rs as this previous answer suggests:

   let bindings = bindgen::Builder::default()
        .header("wrapper.h")
        .clang_arg("-I \"C:\\Program Files\\Azure Kinect SDK v1.3.0\\sdk\\include\"")
        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
        .generate()
        .expect("Unable to generate bindings");

I still get the error saying it cannot find the header file:

wrapper.h:1:10: fatal error: 'k4a/k4a.h' file not found
wrapper.h:1:10: fatal error: 'k4a/k4a.h' file not found, err: true
thread 'main' panicked at 'Unable to generate bindings: ()', build.rs:11:20

Am I missing a place to add something to the include path? Should k4a/k4a.h be on my path somewhere? Or do I have a typo in my config? I'm not sure why it works with raw bindgen on the command line, but not build.rs.

Amedee d'Aboville
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1 Answers1

1

This question had a simple answer.

I added the extra clang argument

.clang_arg("-v")

to see the include path that clang was getting, and I noticed that it showed

" C:\Program Files\Azure Kinect SDK v1.3.0\sdk\include\"

Basically there was a space before the include path. Removing it made it work.

Amedee d'Aboville
  • 95
  • 7