third_party/rust/bindgen/build.rs

   1 use std::env;
   2 use std::fs::File;
   3 use std::io::Write;
   4 use std::path::{Path, PathBuf};
   5
   6 fn main() {
   7     let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
   8
   9     let mut dst =
  10         File::create(Path::new(&out_dir).join("host-target.txt")).unwrap();
  11     dst.write_all(env::var("TARGET").unwrap().as_bytes())
  12         .unwrap();
  13
  14     // On behalf of clang_sys, rebuild ourselves if important configuration
  15     // variables change, to ensure that bindings get rebuilt if the
  16     // underlying libclang changes.
  17     println!("cargo:rerun-if-env-changed=LLVM_CONFIG_PATH");
  18     println!("cargo:rerun-if-env-changed=LIBCLANG_PATH");
  19     println!("cargo:rerun-if-env-changed=LIBCLANG_STATIC_PATH");
  20     println!("cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS");
  21     println!(
  22         "cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS_{}",
  23         std::env::var("TARGET").unwrap()
  24     );
  25     println!(
  26         "cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS_{}",
  27         std::env::var("TARGET").unwrap().replace('-', "_")
  28     );
  29 }