1 // Copyright 2024, Linaro Limited 2 // Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org> 3 // SPDX-License-Identifier: GPL-2.0-or-later 4 5 #[cfg(unix)] 6 use std::os::unix::fs::symlink as symlink_file; 7 #[cfg(windows)] 8 use std::os::windows::fs::symlink_file; 9 use std::{env, fs::remove_file, io::Result, path::Path}; 10 11 use version_check as rustc; 12 13 fn main() -> Result<()> { 14 // Placing bindings.inc.rs in the source directory is supported 15 // but not documented or encouraged. 16 let path = env::var("MESON_BUILD_ROOT") 17 .unwrap_or_else(|_| format!("{}/src", env!("CARGO_MANIFEST_DIR"))); 18 19 let file = format!("{}/bindings.inc.rs", path); 20 let file = Path::new(&file); 21 if !Path::new(&file).exists() { 22 panic!(concat!( 23 "\n", 24 " No generated C bindings found! Maybe you wanted one of\n", 25 " `make clippy`, `make rustfmt`, `make rustdoc`?\n", 26 "\n", 27 " For other uses of `cargo`, start a subshell with\n", 28 " `pyvenv/bin/meson devenv`, or point MESON_BUILD_ROOT to\n", 29 " the top of the build tree." 30 )); 31 } 32 33 let out_dir = env::var("OUT_DIR").unwrap(); 34 let dest_path = format!("{}/bindings.inc.rs", out_dir); 35 let dest_path = Path::new(&dest_path); 36 if dest_path.symlink_metadata().is_ok() { 37 remove_file(dest_path)?; 38 } 39 symlink_file(file, dest_path)?; 40 41 // Check for available rustc features 42 if rustc::is_min_version("1.77.0").unwrap_or(false) { 43 println!("cargo:rustc-cfg=has_offset_of"); 44 } 45 46 println!("cargo:rerun-if-changed=build.rs"); 47 Ok(()) 48 } 49