nfd2 0.3.1

Please use https://crates.io/crates/rfd instead
Documentation 
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/*
Copyright (c) 2016 Saurav Sachidanand

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

use std::{env, process::Command};

macro_rules! nfd {
    ($suf:expr) => {
        concat!("nativefiledialog/src/", $suf);
    };
}

fn main() {
    let mut cfg = cc::Build::new();
    let target = env::var("TARGET").expect("TARGET not specified");

    cfg.include(nfd!("include")).file(nfd!("nfd_common.c"));

    // clang/gcc will give a truncation warning @ nfd_gtk.c:54:59
    // ...but not apple clang! because apple clang is BEST CLANG
    if cfg.get_compiler().is_like_gnu()
        && !env::var("HOST")
            .expect("HOST not specified")
            .contains("darwin")
    {
        cfg.flag("-Wno-format-truncation");
    }

    if target.contains("darwin") {
        cfg.file(nfd!("nfd_cocoa.m")).compile("libnfd.a");
        println!("cargo:rustc-link-lib=framework=AppKit");
    } else if target.contains("windows") {
        cfg.cpp(true)
            .define("_CRT_SECURE_NO_WARNINGS", None)
            .define("UNICODE", None)
            .define("_UNICODE", None)
            .file(nfd!("nfd_win.cpp"))
            .compile("libnfd.a");

        println!("cargo:rustc-link-lib=ole32");
        println!("cargo:rustc-link-lib=shell32");
        // MinGW doesn't link it by default
        println!("cargo:rustc-link-lib=uuid");
    } else {
        let pkg_output = Command::new("pkg-config")
            .arg("--cflags")
            .arg("gtk+-3.0")
            .arg("glib-2.0")
            .arg("--libs")
            .arg("glib-2.0")
            .output();

        if let Ok(output) = pkg_output {
            let t = String::from_utf8(output.stdout).unwrap();
            let flags = t.split(' ');
            for flag in flags {
                if flag != "\n" && !flag.is_empty() {
                    cfg.flag(flag);
                }
            }
        }

        cfg.file(nfd!("nfd_gtk.c")).compile("libnfd.a");

        // The libs needed are the not in the default search-path on FreeBSD
        #[cfg(target_os = "freebsd")]
        {
            let pkg_search = Command::new("pkg-config")
                .arg("--libs-only-L")
                .arg("gtk+-3.0")
                .arg("glib-2.0")
                .output();

            if let Ok(output) = pkg_search {
                let t = String::from_utf8(output.stdout).unwrap();
                let flags = t.split(' ');
                for flag in flags {
                    if let Some(dir) = flag.strip_prefix("-L") {
                        println!("cargo:rustc-link-search={}", dir);
                    }
                }
            }
        }

        println!("cargo:rustc-link-lib=gdk-3");
        println!("cargo:rustc-link-lib=gtk-3");
        println!("cargo:rustc-link-lib=glib-2.0");
        println!("cargo:rustc-link-lib=gobject-2.0");
    }
}