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use std::env;
fn main() {
let llvm_path =
env::var("MU_LLVM_PATH").unwrap_or("/usr/local/mu_library/mu_llvm/llvm-18.1".to_string());
let mu_lib_path = env::var("MU_LIB_PATH").unwrap_or("/usr/local/mu_library/mu/".to_string());
eprintln!("[mu_lib build.rs] Build script executing...");
eprintln!("[mu_lib build.rs] LLVM path: {}", llvm_path);
eprintln!("[mu_lib build.rs] MU library path: {}", mu_lib_path);
println!("cargo:rerun-if-changed=src");
// Set linker
let linker_path = format!("{}/bin/ld.lld", llvm_path);
println!("cargo:rustc-linker={}", linker_path);
eprintln!("[mu_lib build.rs] Linker path: {}", linker_path);
let builtins_rv_path = format!("{}/builtins-rv", llvm_path);
println!("cargo:rustc-link-search={}", builtins_rv_path);
println!("cargo:rustc-link-lib=clang_rt.builtins-riscv64");
// Set linker script
let linker_script_path = format!("{}/script/mu_linker.ld", mu_lib_path);
println!("cargo:rustc-link-args=-T{}", linker_script_path);
eprintln!(
"[mu_lib build.rs] Linker script path: {}",
linker_script_path
);
// Set library path
let picolibc_newlib_path = format!("{}/picolibc-rv/newlib", llvm_path);
println!("cargo:rustc-link-search={}", picolibc_newlib_path);
eprintln!("[mu_lib build.rs] Picolibc path: {}", picolibc_newlib_path);
let mu_lib_search_path = format!("{}/lib", mu_lib_path);
println!("cargo:rustc-link-search={}", mu_lib_search_path);
eprintln!(
"[mu_lib build.rs] MU library search path: {}",
mu_lib_search_path
);
// Set library
println!("cargo:rustc-link-lib=mu_std");
eprintln!("[mu_lib build.rs] Library to link: mu_std");
/* NOTE: Activate only when generating new bindings.
* We primarily provide bindings,
* so there's no need to generate bindings on every build.
* However, if you want to generate new bindings, you can enable this code.
* You need to provide MU_RB_HPP_PATH when you enable this code.
*/
// let mu_rb_hpp_path = env::var("MU_RB_HPP_PATH")
// .unwrap_or("/usr/local/mu_library/mu/include/mu/mu_rb.hpp".to_string());
// println!("cargo:rerun-if-changed={}", mu_rb_hpp_path);
// let bindings = bindgen::Builder::default()
// .enable_cxx_namespaces()
// .header(mu_rb_hpp_path)
// .use_core()
// .clang_arg(format!("-I{}/picolibc-rv/include", llvm_path)) // stdint.h
// .clang_arg(format!("-I{}/libcxx-rv/include/c++/v1", llvm_path)) // cstdint
// .clang_arg(format!("-I{}/include", mu_lib_path))
// .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
// .generate()
// .expect("Unable to generate bindings");
// bindings
// .write_to_file("src/bindings.rs")
// .expect("Couldn't write bindings!");
// Skip cc compilation for docs.rs builds
// if env::var("DOCS_RS").is_ok() {
// println!("cargo:warning=Skipping cc compilation for docs.rs build");
// return;
// }
let startup_path = format!("{}/script/mu_startup.s", mu_lib_path);
let clang_path = format!("{}/bin/clang", llvm_path);
println!("cargo:rerun-if-changed={}", startup_path);
cc::Build::new()
.file(startup_path)
.compiler(clang_path)
.target("riscv64-unknown-none-elf")
.flag("-c")
.flag("-march=rv64imfdxmetis")
// .flag("-fno-pic")
// .flag("-fno-plt")
.flag("-fno-pie")
.flag("-Wno-unused-command-line-argument")
.compile("startup");
}