use std::env;
use std::fs;
use std::path::Path;
use std::process::Command;
fn build_syscalls() {
let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
let syscall_file = format!("src/syscalls/syscall_{target_arch}.c");
cc::Build::new().file(syscall_file).compile("syscall");
}
fn get_page_size() {
let output = Command::new("getconf")
.args(["PAGE_SIZE"])
.output()
.expect("Failed to run getconf");
let page_size_val = std::str::from_utf8(&output.stdout).unwrap();
let page_size_val = page_size_val.trim();
let out_dir = env::var("OUT_DIR").unwrap();
let dest_path = Path::new(&out_dir).join("page_size.rs");
fs::write(
dest_path,
format!("pub const PAGE_SIZE: usize = {page_size_val};"),
)
.unwrap();
}
fn main() {
let rustc_toolchain = env::var("RUSTUP_TOOLCHAIN").unwrap_or_else(|_| "stable".to_string());
if rustc_toolchain.starts_with("nightly") {
println!("cargo:rustc-cfg=has_asm");
} else {
build_syscalls();
}
get_page_size();
}