fbool 0.2.0

Boolean function analysis library: entanglement, entropy, sensitivity, spectral analysis, frontier, and circuit complexity
Documentation 
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// build.rs - Multi-compiler build (MSVC, MinGW, GCC)
// Only builds the optimal5 C++ engine if the "optimal5" feature is enabled.
use std::env;

fn main() {
    // Only build C++ if optimal5 feature is enabled
    if env::var("CARGO_FEATURE_OPTIMAL5").is_err() {
        return;
    }

    println!("cargo:rerun-if-changed=cpp/");

    // Debug info
    let target = env::var("TARGET").unwrap_or_default();
    println!("cargo:warning=Building optimal5 for target: {target}");

    let mut build = cc::Build::new();
    build.cpp(true).file("cpp/lib.cpp").include("cpp");

    // Configure based on target
    if target.contains("msvc") {
        // MSVC-specific flags
        build
            .flag("/std:c++17")
            .flag("/O2") // Optimization level 2
            .flag("/EHsc") // Exception handling model
            .define("_CRT_SECURE_NO_WARNINGS", None); // Disable security warnings
    } else if target.contains("windows") && (target.contains("gnu") || target.contains("mingw")) {
        // MinGW/GCC flags for Windows GNU target
        build
            .flag("-O3")
            .flag("-std=c++17")
            .flag("-Wall")
            .flag("-Wextra")
            .flag("-static-libgcc")
            .flag("-static-libstdc++");

        build.define("WIN32", None);
        build.define("_WIN32", None);
    } else {
        // Default GCC flags for other targets
        build
            .flag("-O3")
            .flag("-std=c++17")
            .flag("-Wall")
            .flag("-Wextra")
            .flag("-pedantic");
    }

    build.compile("optimal5");

    println!("cargo:rustc-link-lib=static=optimal5");
}