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Make the crate cross-compilation-friendly #4

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Dec 12, 2018
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Make the crate cross-compilation-friendly #4

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14 changes: 9 additions & 5 deletions build.rs
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Original file line number Diff line number Diff line change
@@ -1,18 +1,23 @@
extern crate cc;

use std::env::var;

fn main() {
let target_os = var("CARGO_CFG_TARGET_OS").unwrap();
let target_family = var("CARGO_CFG_TARGET_FAMILY").unwrap();

let mut base_config = cc::Build::new();
base_config.include(".");
base_config.include("libusb/libusb");

if cfg!(target_os = "macos") {
if target_os == "macos" {
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Do these always match or should we use contains instead for all checks?

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I assume that CARGO_CFG_TARGET_OS contains the same value as cfg!(target_os), and right now it works by matching exactly, so I suppose it will still continue to work by matching exactly.

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") {
if 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"));
Expand All @@ -24,7 +29,7 @@ fn main() {
base_config.define("_GNU_SOURCE", Some("1"));
}

if cfg!(unix) {
if target_family == "unix" {
base_config.define("HAVE_DLFCN_H", Some("1"));
base_config.define("HAVE_GETTIMEOFDAY", Some("1"));
base_config.define("HAVE_INTTYPES_H", Some("1"));
Expand All @@ -48,7 +53,7 @@ fn main() {
base_config.file("libusb/libusb/os/threads_posix.c");
}

if cfg!(windows) {
if target_os == "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");
Expand All @@ -74,7 +79,6 @@ fn main() {
}

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") {
Expand Down