Can't compile on Windows

[Adarma]

Windows 7, toolchain:
stable-x86_64-pc-windows-msvc

running cargo run --example simple:

error: failed to run custom build command for `onig_sys v69.2.0 (C:\CODE\Rust\rust-onig\onig_sys)`

Caused by:
  process didn't exit successfully: `C:\CODE\Rust\rust-onig\target\debug\build\onig_sys-fcd2de2891f1f796\build-script-build` (exit code: 101)
--- stdout
cargo:warning=couldn't execute `llvm-config --prefix` (error: The system cannot find the file specified. (os error 2))
cargo:warning=set the LLVM_CONFIG_PATH environment variable to a valid `llvm-config` executable

--- stderr
thread 'main' panicked at 'Unable to find libclang: "couldn\'t find any valid shared libraries matching: [\'clang.dll\', \'libclang.dll\'], set the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])"', src\libcore\result.rs:1188:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

Does something else need to be installed?
From the ReadMe, it sounded like it will build from source

[oovm]

Same problem: https://github.com/GalAster/carbon-rs/runs/492035660

   Compiling onig_sys v69.2.0
     Running `rustc --crate-name build_script_build C:\Users\runneradmin\.cargo\registry\src\github.com-1ecc6299db9ec823\onig_sys-69.2.0\build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C opt-level=3 -C metadata=523edfba9713ec13 -C extra-filename=-523edfba9713ec13 --out-dir D:\a\carbon-rs\carbon-rs\target\release\build\onig_sys-523edfba9713ec13 -L dependency=D:\a\carbon-rs\carbon-rs\target\release\deps --extern bindgen=D:\a\carbon-rs\carbon-rs\target\release\deps\libbindgen-aa80d456a78fa41c.rlib --extern cc=D:\a\carbon-rs\carbon-rs\target\release\deps\libcc-6c97d0e1bec95bbf.rlib --extern pkg_config=D:\a\carbon-rs\carbon-rs\target\release\deps\libpkg_config-d357e1153e3965c7.rlib --cap-lints allow`
     Running `D:\a\carbon-rs\carbon-rs\target\release\build\onig_sys-523edfba9713ec13\build-script-build`
error: failed to run custom build command for `onig_sys v69.2.0`

Caused by:
  process didn't exit successfully: `D:\a\carbon-rs\carbon-rs\target\release\build\onig_sys-523edfba9713ec13\build-script-build` (exit code: 101)
--- stdout
cargo:warning=couldn't execute `llvm-config --prefix` (error: The system cannot find the file specified. (os error 2))
cargo:warning=set the LLVM_CONFIG_PATH environment variable to a valid `llvm-config` executable

--- stderr
thread 'main' panicked at 'Unable to find libclang: "couldn\'t find any valid shared libraries matching: [\'clang.dll\', \'libclang.dll\'], set the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])"', src\libcore\result.rs:1188:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

##[error]Process completed with exit code 1.

[iwillspeak]

Both of these errors appear to be a lack of the llvm-config too which the bindgen crate uses to generate bindings.

I plan on updating this crate to pre-pack the bindings for common platforms. That work is being tracked in #126.

In the mean time you'll need LLVM installed to get llvm-config available for bindgen to use.

[Keats]

The new version can disable the bindgen build now.