Windows build process fails because of webrtc

[pronoym99]

Summary

The Windows build fails with the following

error: failed to run custom build command for webrtc-sys v0.3.7 (https://github.com/zed-industries/livekit-rust-sdks?rev=80bb8f4c9112789f7c24cc98d8423010977806a6#80bb8f4c)

Complete error output on console

error: failed to run custom build command for `webrtc-sys v0.3.7 (https://github.com/zed-industries/livekit-rust-sdks?rev=80bb8f4c9112789f7c24cc98d8423010977806a6#80bb8f4c)`

Caused by:
  process didn't exit successfully: `path\to\zed\target\release\build\webrtc-sys-4c24a0e26bc1e933\build-script-build` (exit code: 101)
  --- stdout
  cargo:rerun-if-env-changed=LK_DEBUG_WEBRTC
  cargo:rerun-if-env-changed=LK_CUSTOM_WEBRTC
  cargo:CXXBRIDGE_PREFIX=webrtc-sys
  cargo:CXXBRIDGE_DIR0=path\to\zed\target\release\build\webrtc-sys-a0ffebd75f830626\out\cxxbridge\include
  cargo:CXXBRIDGE_DIR1=path\to\zed\target\release\build\webrtc-sys-a0ffebd75f830626\out\cxxbridge\crate

  --- stderr

  CXX include path:
    path\to\zed\target\release\build\webrtc-sys-a0ffebd75f830626\out\cxxbridge\include
    path\to\zed\target\release\build\webrtc-sys-a0ffebd75f830626\out\cxxbridge\crate

  thread 'main' panicked at C:\Users\<username>\.cargo\git\checkouts\livekit-rust-sdks-d281d0d44fd23f40\80bb8f4\webrtc-sys\build.rs:89:45:
  called `Result::unwrap()` on an `Err` value: reqwest::Error { kind: Builder, source: Os { code: 3, kind: NotFound, message: "The system cannot find the path specified." } }
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

Steps to reproduce: Run cargo run --release in your local Zed directory

Expected Behavior: Fully built Zed release version
Actual Behavior: Fails with the above error

Zed Version and System Specs

Zed: v0.137.0 (Zed Dev)
OS: Windows 10.0.26100
Memory: 31.9 GiB
Architecture: x86_64

[pronoym99]

In addition to the standard steps above, I have also carried out cargo clean followed by cargo build, which still leads to the above issue.

[nothing2sayi]

I have the same problem, my computer is macos

[pronoym99]

I have decided not to use the standard build process for Windows because it is failing continuously. I have resorted to using ready-made Windows builds via Scoop. Those of you who are facing the same issue and don't intend to do patchwork (and build your copy of Zed) and need a ready-to-use version may choose this method.

[JunkuiZhang]

What version of the Windows SDK do you have installed on your machine? There have been reports that SDK versions lower than 26100 can cause WebRTC to fail to build.

[ReadyPlayerEmma]

I followed the instructions from the Building Zed for Windows page and the only thing I ran into was this error.

The simple change in SDK version to the newer Windows 11 SDK 26100 resolved it perfectly though. It might be helpful to add a note about that unless you foresee future WebRTC changes that allow it to work with older versions again.