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cb7ada5409
Right now, using cargo with QEMU requires copying by hand the bindings.rs to the source tree. Instead, we can use an include file to escape the cage of cargo's mandated source directory structure. By running cargo within meson's "devenv" and adding a MESON_BUILD_ROOT environment variable, it is easy for build.rs to find the file. However, the file must be symlinked into cargo's output directory for rust-analyzer to find it. Suggested-by: Junjie Mao <junjie.mao@hotmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
// Copyright 2024, Linaro Limited
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// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
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// SPDX-License-Identifier: GPL-2.0-or-later
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#[cfg(unix)]
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use std::os::unix::fs::symlink as symlink_file;
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#[cfg(windows)]
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use std::os::windows::fs::symlink_file;
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use std::{env, fs::remove_file, io::Result, path::Path};
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use version_check as rustc;
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fn main() -> Result<()> {
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// Placing bindings.inc.rs in the source directory is supported
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// but not documented or encouraged.
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let path = env::var("MESON_BUILD_ROOT")
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.unwrap_or_else(|_| format!("{}/src", env!("CARGO_MANIFEST_DIR")));
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let file = format!("{}/bindings.inc.rs", path);
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let file = Path::new(&file);
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if !Path::new(&file).exists() {
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panic!(concat!(
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"No generated C bindings found! If you want to run `cargo`, start a subshell\n",
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"with `meson devenv`, or point MESON_BUILD_ROOT to the top of the build tree."
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));
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}
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let out_dir = env::var("OUT_DIR").unwrap();
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let dest_path = format!("{}/bindings.inc.rs", out_dir);
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let dest_path = Path::new(&dest_path);
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if dest_path.symlink_metadata().is_ok() {
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remove_file(dest_path)?;
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}
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symlink_file(file, dest_path)?;
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// Check for available rustc features
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if rustc::is_min_version("1.77.0").unwrap_or(false) {
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println!("cargo:rustc-cfg=has_offset_of");
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}
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println!("cargo:rerun-if-changed=build.rs");
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Ok(())
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}
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