86 lines
2.5 KiB
Rust
86 lines
2.5 KiB
Rust
use std::{env, fs, path::Path};
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use abi_generator::{
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abi::{ty::TypeWidth, AbiBuilder},
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syntax::UnwrapFancy,
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TargetEnv,
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};
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fn add_file<'a>(build: &'a mut cc::Build, name: &'a str) -> &'a mut cc::Build {
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println!("cargo:rerun-if-changed={}", name);
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build.file(name)
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}
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fn load_abi_definitions<P: AsRef<Path>>(path: P) -> String {
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let mut content = String::new();
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for file in fs::read_dir(path).unwrap() {
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let file = file.unwrap();
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if file.path().extension().map(|x| x == "abi").unwrap_or(false) {
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println!("cargo:rerun-if-changed={}", file.path().display());
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content.extend(fs::read_to_string(file.path()));
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}
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}
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content
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}
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fn build_libm() {
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println!("cargo:rerun-if-changed=libm/private.h");
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let mut build = cc::Build::new();
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build
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.compiler("clang")
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.flag("-ffreestanding")
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.flag("-nostdlib");
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add_file(&mut build, "libm/s_truncf.c");
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add_file(&mut build, "libm/s_ceilf.c");
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add_file(&mut build, "libm/s_floorf.c");
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add_file(&mut build, "libm/s_fabsf.c");
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add_file(&mut build, "libm/s_scalbnf.c");
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add_file(&mut build, "libm/s_copysignf.c");
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add_file(&mut build, "libm/e_powf.c");
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add_file(&mut build, "libm/e_sqrtf.c");
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add_file(&mut build, "libm/e_hypotf.c");
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add_file(&mut build, "libm/e_fmodf.c");
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add_file(&mut build, "libm/w_powf.c");
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add_file(&mut build, "libm/w_hypotf.c");
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add_file(&mut build, "libm/w_fmodf.c");
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build.compile("m");
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}
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fn generate_abi<P: AsRef<Path>>(target_is_64bit: bool, abi_path: P) {
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let output_dir = std::env::var("OUT_DIR").expect("$OUT_DIR not set");
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let generated_calls = Path::new(&output_dir).join("generated_calls.rs");
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let target_env = if target_is_64bit {
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TargetEnv {
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thin_pointer_width: TypeWidth::U64,
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fat_pointer_width: TypeWidth::U128,
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}
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} else {
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TargetEnv {
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thin_pointer_width: TypeWidth::U32,
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fat_pointer_width: TypeWidth::U64,
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}
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};
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let abi = load_abi_definitions(abi_path);
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let abi = AbiBuilder::from_string(&abi, target_env).unwrap_fancy(&abi);
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let calls = prettyplease::unparse(
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&abi.emit_file(false, true)
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.unwrap_fancy("Could not emit system calls"),
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);
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fs::write(generated_calls, calls).unwrap();
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}
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fn main() {
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let target_is_64bit = env::var("CARGO_CFG_TARGET_POINTER_WIDTH").unwrap() == "64";
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println!("cargo:rustc-check-cfg=cfg(rust_analyzer)");
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build_libm();
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generate_abi(target_is_64bit, "../abi/def");
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}
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