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build.rs
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
fn main() {
let target = std::env::var("TARGET").unwrap();
if target.contains("apple") {
// On (older) OSX we need to link against the clang runtime,
// which is hidden in some non-default path.
//
// More details at https://github.com/alexcrichton/curl-rust/issues/279.
if let Some(path) = macos_link_search_path() {
println!("cargo:rustc-link-lib=clang_rt.osx");
println!("cargo:rustc-link-search={path}");
}
}
}
fn macos_link_search_path() -> Option<String> {
let output = cc::Build::new()
.get_compiler()
.to_command()
.arg("--print-search-dirs")
.output()
.ok()?;
if !output.status.success() {
println!(
"failed to run 'clang --print-search-dirs', continuing without a link search path"
);
return None;
}
let stdout = String::from_utf8_lossy(&output.stdout);
for line in stdout.lines() {
if line.contains("libraries: =") {
let path = line.split('=').nth(1)?;
if !path.is_empty() {
return Some(format!("{path}/lib/darwin"));
}
}
}
println!("failed to determine link search path, continuing without it");
None
}