libusb1-sys 0.3.0

FFI bindings for libusb.
Documentation 
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fn main() {
    if let Err(_) = pkg_config::find_library("libusb-1.0") {
        let mut base_config = cc::Build::new();
        base_config.include(".");
        base_config.include("libusb/libusb");

        if cfg!(target_os = "macos") {
            base_config.define("OS_DARWIN", Some("1"));
            base_config.file("libusb/libusb/os/darwin_usb.c");
            link_framework("CoreFoundation");
            link_framework("IOKit");
            link("objc", false);
        }
        if cfg!(target_os = "linux") {
            base_config.define("OS_LINUX", Some("1"));
            base_config.define("HAVE_ASM_TYPES_H", Some("1"));
            base_config.define("HAVE_LINUX_NETLINK_H", Some("1"));
            base_config.define("HAVE_SYS_SOCKET_H", Some("1"));
            base_config.define("USBI_TIMERFD_AVAILABLE", Some("1"));
            base_config.file("libusb/libusb/os/linux_netlink.c");
            base_config.file("libusb/libusb/os/linux_usbfs.c");
            base_config.define("POLL_NFDS_TYPE", Some("nfds_t"));
            base_config.define("_GNU_SOURCE", Some("1"));
        }

        if cfg!(unix) {
            base_config.define("HAVE_DLFCN_H", Some("1"));
            base_config.define("HAVE_GETTIMEOFDAY", Some("1"));
            base_config.define("HAVE_INTTYPES_H", Some("1"));
            base_config.define("HAVE_MEMORY_H", Some("1"));
            base_config.define("HAVE_POLL_H", Some("1"));
            base_config.define("HAVE_STDINT_H", Some("1"));
            base_config.define("HAVE_STDLIB_H", Some("1"));
            base_config.define("HAVE_STRINGS_H", Some("1"));
            base_config.define("HAVE_STRING_H", Some("1"));
            base_config.define("HAVE_STRUCT_TIMESPEC", Some("1"));
            base_config.define("HAVE_SYS_STAT_H", Some("1"));
            base_config.define("HAVE_SYS_TIME_H", Some("1"));
            base_config.define("HAVE_SYS_TYPES_H", Some("1"));
            base_config.define("HAVE_UNISTD_H", Some("1"));
            base_config.define("POLL_NFDS_TYPE", Some("nfds_t"));
            base_config.define("STDC_HEADERS", Some("1"));
            base_config.define("THREADS_POSIX", Some("1"));
            base_config.define(
                "DEFAULT_VISIBILITY",
                Some("__attribute__((visibility(\"default\")))"),
            );

            base_config.file("libusb/libusb/os/poll_posix.c");
            base_config.file("libusb/libusb/os/threads_posix.c");
        }

        if cfg!(windows) {
            base_config.define("OS_WINDOWS", Some("1"));
            base_config.file("libusb/libusb/os/poll_windows.c");
            base_config.file("libusb/libusb/os/threads_windows.c");
            base_config.file("libusb/libusb/os/windows_usb.c");

            base_config.define("DEFAULT_VISIBILITY", Some(""));
            base_config.define("_TIMESPEC_DEFINED", Some("1"));
            base_config.define("POLL_NFDS_TYPE", Some("unsigned int"));
            base_config.define("HAVE_SIGNAL_H", Some("1"));
            base_config.define("HAVE_SYS_TYPES_H", Some("1"));
            link("user32", false);
        }

        base_config.file("libusb/libusb/core.c");
        base_config.file("libusb/libusb/descriptor.c");
        base_config.file("libusb/libusb/hotplug.c");
        base_config.file("libusb/libusb/io.c");
        base_config.file("libusb/libusb/strerror.c");
        base_config.file("libusb/libusb/sync.c");

        base_config.compile("libusb.a");
    }
}

pub fn link(name: &str, bundled: bool) {
    use std::env::var;
    let target = var("TARGET").unwrap();
    let target: Vec<_> = target.split('-').collect();
    if target.get(2) == Some(&"windows") {
        println!("cargo:rustc-link-lib=dylib={}", name);
        if bundled && target.get(3) == Some(&"gnu") {
            let dir = var("CARGO_MANIFEST_DIR").unwrap();
            println!("cargo:rustc-link-search=native={}/{}", dir, target[0]);
        }
    }
}

pub fn link_framework(name: &str) {
    println!("cargo:rustc-link-lib=framework={}", name);
}