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|
use std::env;
use std::ffi::OsStr;
macro_rules! cfg_var {
( $name:ident , $value:ident ) => {
env::var_os(format!(
"CARGO_{}_{}",
stringify!($name),
stringify!($value).to_uppercase(),
))
.is_some()
};
}
macro_rules! targets {
( $name:ident => $($value:ident),+ ) => {
env::var_os(concat!("CARGO_CFG_TARGET_", stringify!($name)))
.as_deref()
.and_then(OsStr::to_str)
.is_some_and(|values| {
let values: Vec<_> = values.split(',').collect();
[$(stringify!($value)),+]
.into_iter()
.any(|x| values.contains(&x))
})
};
}
macro_rules! new_cfg {
( $name:expr , $condition:expr ) => {{
println!("cargo:rustc-check-cfg=cfg({})", $name);
if $condition {
println!("cargo:rustc-cfg={}", $name);
}
}};
}
macro_rules! new_crate_cfg {
( $name:ident , $condition:expr $(,)? ) => {
new_cfg!(concat!("process_control_", stringify!($name)), $condition)
};
}
fn main() {
new_crate_cfg!(docs_rs, false);
new_crate_cfg!(
memory_limit,
targets!(OS => android)
|| (targets!(OS => linux) && targets!(ENV => gnu, musl))
|| cfg_var!(CFG, windows),
);
new_crate_cfg!(
unix_waitid,
!targets!(OS => espidf, horizon, openbsd, redox, tvos, vxworks),
);
}
|
