build.rs

fn main() {
    #[cfg(feature = "smtc")]
    {
        println!("cargo:rerun-if-changed=c/ckb_smt.h");

        cc::Build::new()
            .file("src/ckb_smt.c")
            .static_flag(true)
            .flag("-O3")
            .flag("-fvisibility=hidden")
            .flag("-fdata-sections")
            .flag("-ffunction-sections")
            .include("src/")
            .include("c/")
            .include("c/deps/ckb-c-stdlib")
            .flag("-Wall")
            .flag("-Werror")
            .flag("-Wno-unused-parameter")
            .flag("-Wno-nonnull")
            .define("__SHARED_LIBRARY__", None)
            .define("CKB_STDLIB_NO_SYSCALL_IMPL", None)
            .compile("smt-c-impl");
    }
}