examples/rust_example/build/BUILD.gn

toolchain("rust") {
  tool("rust_bin") {
    depfile = "{{target_out_dir}}/{{crate_name}}.d"
    outfile = "{{target_out_dir}}/{{crate_name}}"
    command = "rustc --crate-name {{crate_name}} {{source}} --crate-type {{crate_type}} --emit=dep-info=$depfile,link -Z dep-info-omit-d-target {{rustflags}} -o $outfile {{rustdeps}} {{externs}}"
    description = "RUST $outfile"
    outputs = [ outfile ]
  }

  tool("rust_staticlib") {
    depfile = "{{target_out_dir}}/{{crate_name}}.d"
    outfile = "{{target_out_dir}}/{{crate_name}}.a"
    command = "rustc --crate-name {{crate_name}} {{source}} --crate-type {{crate_type}} --emit=dep-info=$depfile,link -Z dep-info-omit-d-target {{rustflags}} -o $outfile {{rustdeps}} {{externs}}"
    description = "RUST $outfile"
    outputs = [ outfile ]
  }

  tool("rust_rlib") {
    depfile = "{{target_out_dir}}/{{crate_name}}.d"
    outfile = "{{target_out_dir}}/lib{{crate_name}}.rlib"
    command = "rustc --crate-name {{crate_name}} {{source}} --crate-type {{crate_type}} --emit=dep-info=$depfile,link -Z dep-info-omit-d-target {{rustflags}} -o $outfile {{rustdeps}} {{externs}}"
    description = "RUST $outfile"
    outputs = [ outfile ]
  }

  tool("rust_cdylib") {
    depfile = "{{target_out_dir}}/{{crate_name}}.d"
    outfile = "{{target_out_dir}}/lib{{crate_name}}.so"
    command = "rustc --crate-name {{crate_name}} {{source}} --crate-type {{crate_type}} --emit=dep-info=$depfile,link -Z dep-info-omit-d-target {{rustflags}} -o $outfile {{rustdeps}} {{externs}}"
    description = "RUST $outfile"
    outputs = [ outfile ]
  }

  tool("stamp") {
    command = "touch {{output}}"
    description = "STAMP {{output}}"
  }

  tool("copy") {
    command = "cp -af {{source}} {{output}}"
    description = "COPY {{source}} {{output}}"
  }
}

config("rust_defaults") {
  rustflags = [ "-Cdebuginfo=2" ]
}