92 lines
2.8 KiB
Rust
92 lines
2.8 KiB
Rust
use std::env;
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use std::path::{Path, PathBuf};
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use std::process::Command;
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const MAINNET_FIELD_ELEMENTS_PER_BLOB: usize = 4096;
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const MINIMAL_FIELD_ELEMENTS_PER_BLOB: usize = 4;
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fn move_file(src: &Path, dst: &Path) -> Result<(), String> {
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std::fs::copy(src, dst)
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.map_err(|_| format!("Failed to copy {} to {}", src.display(), dst.display()))?;
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std::fs::remove_file(src)
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.map_err(|_| format!("Failed to remove file {} from source", src.display()))?;
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Ok(())
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}
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fn main() {
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let root_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("../../");
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let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
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// Ensure libblst exists in `OUT_DIR`
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// Assuming blst submodule exists
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Command::new("make")
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.current_dir(root_dir.join("src"))
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.arg("blst")
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.status()
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.unwrap();
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move_file(
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root_dir.join("lib/libblst.a").as_path(),
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out_dir.join("libblst.a").as_path(),
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)
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.unwrap();
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let field_elements_per_blob = if cfg!(feature = "minimal-spec") {
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MINIMAL_FIELD_ELEMENTS_PER_BLOB
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} else {
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MAINNET_FIELD_ELEMENTS_PER_BLOB
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};
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eprintln!("Using FIELD_ELEMENTS_PER_BLOB={}", field_elements_per_blob);
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// Deleting any existing assembly and object files to ensure that compiling with a different
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// feature flag changes the final linked library file.
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let obj_file = root_dir.join("src/c_kzg_4844.o");
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if obj_file.exists() {
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std::fs::remove_file(obj_file).unwrap();
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}
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// Ensure libckzg exists in `OUT_DIR`
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Command::new("make")
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.current_dir(root_dir.join("src"))
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.arg("all")
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.arg(format!(
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"FIELD_ELEMENTS_PER_BLOB={}",
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field_elements_per_blob
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))
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.status()
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.unwrap();
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Command::new("ar")
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.current_dir(&root_dir.join("src"))
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.args(["crus", "libckzg.a", "c_kzg_4844.o"])
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.status()
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.unwrap();
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move_file(
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root_dir.join("src/libckzg.a").as_path(),
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out_dir.join("libckzg.a").as_path(),
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)
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.unwrap();
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println!("cargo:rustc-link-search={}", out_dir.display());
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println!("cargo:rustc-link-search={}", out_dir.display());
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println!("cargo:rustc-link-lib=static=ckzg");
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println!("cargo:rustc-link-lib=static=blst");
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// Write the compile time variable to a consts.rs file to be imported to the bindings module.
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let const_file = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("src/consts.rs");
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std::fs::write(
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const_file,
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format!(
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"pub const FIELD_ELEMENTS_PER_BLOB: usize = {};",
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field_elements_per_blob
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),
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)
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.unwrap();
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// Cleanup
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let obj_file = root_dir.join("src/c_kzg_4844.o");
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if obj_file.exists() {
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std::fs::remove_file(obj_file).unwrap();
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}
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}
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