34 lines
1,016 B
Rust
34 lines
1,016 B
Rust
use std::env;
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use std::fs;
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use std::path::PathBuf;
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fn main() {
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println!("cargo:rerun-if-changed=build.rs");
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let libstdcxx = cfg!(feature = "libstdc++");
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let libcxx = cfg!(feature = "libc++");
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let nothing = cfg!(feature = "nothing");
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if nothing {
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return;
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}
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if libstdcxx && libcxx {
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println!(
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"cargo:warning=-lstdc++ and -lc++ are both requested, \
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using the platform's default"
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);
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}
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match (libstdcxx, libcxx) {
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(true, false) => println!("cargo:rustc-link-lib=stdc++"),
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(false, true) => println!("cargo:rustc-link-lib=c++"),
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(false, false) | (true, true) => {
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// The platform's default.
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let out_dir = env::var_os("OUT_DIR").expect("missing OUT_DIR");
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let path = PathBuf::from(out_dir).join("dummy.cc");
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fs::write(&path, "int rust_link_cplusplus;\n").unwrap();
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cc::Build::new().cpp(true).file(&path).compile("link-cplusplus");
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}
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}
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}
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