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|
extern crate cc;
use std::env;
fn main() {
match env::var("CARGO_CFG_TARGET_OS").unwrap_or_default().as_str() {
"android" => build_android(),
_ => {}
}
}
fn build_android() {
let expansion = match cc::Build::new().file("src/android-api.c").try_expand() {
Ok(result) => result,
Err(e) => {
println!("cargo:warning=failed to run C compiler: {}", e);
return;
}
};
let expansion = match std::str::from_utf8(&expansion) {
Ok(s) => s,
Err(_) => return,
};
let marker = "APIVERSION";
let i = expansion.find(marker).unwrap_or_default();
let version = expansion[i + marker.len() + 1..]
.split_whitespace()
.next()
.unwrap_or("");
let version = version.parse::<u32>().unwrap_or_else(|_| {
println!("cargo:warning=failed to get android api version.");
0
});
if version >= 21 {
println!("cargo:rustc-cfg=feature=\"dl_iterate_phdr\"");
}
}
|
