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use std::env;
use std::path::{Path, PathBuf};
use std::process::Command;
pub(crate) fn build_backend(
channel: &str,
host_triple: &str,
use_unstable_features: bool,
) -> PathBuf {
let mut cmd = Command::new("cargo");
cmd.arg("build").arg("--target").arg(host_triple);
cmd.env("CARGO_BUILD_INCREMENTAL", "true"); // Force incr comp even in release mode
let mut rustflags = env::var("RUSTFLAGS").unwrap_or_default();
if env::var("CI").as_ref().map(|val| &**val) == Ok("true") {
// Deny warnings on CI
rustflags += " -Dwarnings";
// Disabling incr comp reduces cache size and incr comp doesn't save as much on CI anyway
cmd.env("CARGO_BUILD_INCREMENTAL", "false");
}
if use_unstable_features {
cmd.arg("--features").arg("unstable-features");
}
match channel {
"debug" => {}
"release" => {
cmd.arg("--release");
}
_ => unreachable!(),
}
// Set the rpath to make the cg_clif executable find librustc_codegen_cranelift without changing
// LD_LIBRARY_PATH
if cfg!(unix) {
if cfg!(target_os = "macos") {
rustflags += " -Csplit-debuginfo=unpacked \
-Clink-arg=-Wl,-rpath,@loader_path/../lib \
-Zosx-rpath-install-name";
} else {
rustflags += " -Clink-arg=-Wl,-rpath=$ORIGIN/../lib ";
}
}
cmd.env("RUSTFLAGS", rustflags);
eprintln!("[BUILD] rustc_codegen_cranelift");
crate::utils::spawn_and_wait(cmd);
Path::new("target").join(host_triple).join(channel)
}
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