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50 lines
1.5 KiB
50 lines
1.5 KiB
use std::env;
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use std::path::Path;
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use std::process::Command;
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fn main() {
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cc::Build::new()
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.file("src/cxx.cc")
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.cpp(true)
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.cpp_link_stdlib(None) // linked via link-cplusplus crate
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.flag_if_supported(cxxbridge_flags::STD)
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.warnings_into_errors(cfg!(deny_warnings))
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.compile("cxxbridge1");
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println!("cargo:rerun-if-changed=src/cxx.cc");
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println!("cargo:rerun-if-changed=include/cxx.h");
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println!("cargo:rustc-cfg=built_with_cargo");
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if let Some(manifest_dir) = env::var_os("CARGO_MANIFEST_DIR") {
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let cxx_h = Path::new(&manifest_dir).join("include").join("cxx.h");
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println!("cargo:HEADER={}", cxx_h.to_string_lossy());
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}
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if let Some(rustc) = rustc_version() {
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if rustc.minor < 48 {
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println!("cargo:warning=The cxx crate requires a rustc version 1.48.0 or newer.");
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println!(
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"cargo:warning=You appear to be building with: {}",
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rustc.version,
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);
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}
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}
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}
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struct RustVersion {
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version: String,
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minor: u32,
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}
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fn rustc_version() -> Option<RustVersion> {
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let rustc = env::var_os("RUSTC")?;
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let output = Command::new(rustc).arg("--version").output().ok()?;
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let version = String::from_utf8(output.stdout).ok()?;
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let mut pieces = version.split('.');
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if pieces.next() != Some("rustc 1") {
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return None;
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}
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let minor = pieces.next()?.parse().ok()?;
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Some(RustVersion { version, minor })
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}
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