fn main()

in build.rs [5:79]
63 lines of code
12 McCabe index (conditional complexity)

fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    println!("cargo:rerun-if-changed=include/yyjson/*");
    println!("cargo:rerun-if-env-changed=CC");
    println!("cargo:rerun-if-env-changed=CFLAGS");
    println!("cargo:rerun-if-env-changed=LDFLAGS");
    println!("cargo:rerun-if-env-changed=ORJSON_DISABLE_AVX512");
    println!("cargo:rerun-if-env-changed=ORJSON_DISABLE_SIMD");
    println!("cargo:rerun-if-env-changed=ORJSON_DISABLE_YYJSON");
    println!("cargo:rerun-if-env-changed=RUSTFLAGS");
    println!("cargo:rustc-check-cfg=cfg(intrinsics)");
    println!("cargo:rustc-check-cfg=cfg(optimize)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_10)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_11)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_12)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_13)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_14)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_8)");
    println!("cargo:rustc-check-cfg=cfg(Py_3_9)");
    println!("cargo:rustc-check-cfg=cfg(Py_GIL_DISABLED)");
    println!("cargo:rustc-check-cfg=cfg(yyjson_allow_inf_and_nan)");

    let python_config = pyo3_build_config::get();
    for cfg in python_config.build_script_outputs() {
        println!("{cfg}");
    }

    if let Some(true) = version_check::supports_feature("core_intrinsics") {
        println!("cargo:rustc-cfg=feature=\"intrinsics\"");
    }

    if let Some(true) = version_check::supports_feature("optimize_attribute") {
        println!("cargo:rustc-cfg=feature=\"optimize\"");
    }

    #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
    if env::var("ORJSON_DISABLE_SIMD").is_err() {
        // auto build unstable SIMD on nightly
        if let Some(true) = version_check::supports_feature("portable_simd") {
            println!("cargo:rustc-cfg=feature=\"unstable-simd\"");
        }
        // auto build AVX512 on x86-64-v4 or supporting native targets
        #[cfg(all(target_arch = "x86_64", target_feature = "avx512vl"))]
        if let Some(true) = version_check::supports_feature("stdarch_x86_avx512") {
            if env::var("ORJSON_DISABLE_AVX512").is_err() {
                println!("cargo:rustc-cfg=feature=\"avx512\"");
            }
        }
    }

    #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
    if matches!(python_config.pointer_width, Some(64)) {
        println!("cargo:rustc-cfg=feature=\"inline_int\"");
    }

    if env::var("ORJSON_DISABLE_YYJSON").is_ok() {
        if env::var("CARGO_FEATURE_YYJSON").is_ok() {
            panic!("ORJSON_DISABLE_YYJSON and --features=yyjson both enabled.")
        }
    } else {
        // Compile yyjson
        cc::Build::new()
            .file("include/yyjson/yyjson.c")
            .compile("yyjson");

        // Link against Python
        let python_config = pyo3_build_config::get();
        for cfg in python_config.build_script_outputs() {
            println!("{cfg}");
        }

        println!("cargo:rustc-cfg=feature=\"yyjson\"");
        println!("cargo:rustc-cfg=yyjson_allow_inf_and_nan");
    }
}