Update hidapi-sys crate to 0.1.4

This change updates the hidapi-sys crate to version 0.1.4. In this
version the cc crate (the stable and renamed version of the gcc crate)
is used.

Import subrepo hidapi-sys/:hidapi-sys at c01043da72c0cac898660017e4c4115278c14369
Import subrepo cc/:cc at 500c65b03775cecf55bd358e616963bc3222acca

3 files changed, 42 insertions, 20 deletions

diff --git a/hidapi-sys/Cargo.toml b/hidapi-sys/Cargo.toml
index 15b4e9e..3483b34 100644
--- a/hidapi-sys/Cargo.toml
+++ b/hidapi-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name    = "hidapi-sys"
-version = "0.1.2"
+version = "0.1.4"
 build   = "build.rs"
 links   = "hidapi"
 
@@ -20,5 +20,5 @@ build  = ["static"]
 libc = "0.2"
 
 [build-dependencies]
-gcc        = "0.3"
+cc         = "1.0"
 pkg-config = "0.3"
diff --git a/hidapi-sys/README.md b/hidapi-sys/README.md
new file mode 100644
index 0000000..89048b1
--- /dev/null
+++ b/hidapi-sys/README.md
@@ -0,0 +1,10 @@
+hidapi-sys [![WTFPL](http://img.shields.io/badge/license-WTFPL-blue.svg)](http://www.wtfpl.net/txt/copying)
+==========
+Bindings for hidapi with support for building sources automatically.
+
+Requirements
+------------
+`gcc` and `pkg-config` are required for building source automatically.
+
+`git` is required unless `HIDAPI_PATH` is exported to an existing checkout of
+hidapi sources.
diff --git a/hidapi-sys/build.rs b/hidapi-sys/build.rs
index d910944..4a392c6 100644
--- a/hidapi-sys/build.rs
+++ b/hidapi-sys/build.rs
@@ -1,4 +1,4 @@
-extern crate gcc;
+extern crate cc;
 extern crate pkg_config;
 
 use std::env;
@@ -11,8 +11,8 @@ fn main() {
 		return;
 	}
 
-	fetch().unwrap();
-	build().unwrap();
+	fetch().expect("failed to checkout hidapi sources, internet connection and git are needed");
+	build().expect("failed to build hidapi sources");
 
 	println!("cargo:rustc-link-search=native={}", output().to_string_lossy());
 }
@@ -22,10 +22,19 @@ fn output() -> PathBuf {
 }
 
 fn source() -> PathBuf {
-	output().join("hidapi")
+	if let Ok(path) = env::var("HIDAPI_PATH") {
+		path.into()
+	}
+	else {
+		output().join("hidapi")
+	}
 }
 
 fn fetch() -> io::Result<()> {
+	if env::var("HIDAPI_PATH").is_ok() {
+		return Ok(());
+	}
+
 	Command::new("git")
 		.current_dir(&output())
 		.arg("clone")
@@ -38,44 +47,47 @@ fn fetch() -> io::Result<()> {
 
 #[cfg(target_os = "linux")]
 fn build() -> io::Result<()> {
-	let mut config = gcc::Build::new();
+	let mut build = cc::Build::new();
 
-	config.file(source().join("libusb/hid.c"));
-	config.include(source().join("hidapi"));
+	build.file(source().join("libusb/hid.c"));
+	build.include(source().join("hidapi"));
+	build.static_flag(true);
 
 	for path in pkg_config::find_library("libusb-1.0").unwrap().include_paths {
-		config.include(path.to_str().unwrap());
+		build.include(path.to_str().unwrap());
 	}
 
-	config.compile("libhidapi-libusb.a");
+	build.compile("libhidapi-libusb.a");
 
 	Ok(())
 }
 
 #[cfg(target_os = "macos")]
 fn build() -> io::Result<()> {
-	let mut config = gcc::Build::new();
+	let mut build = cc::Build::new();
 
-	config.file(source().join("libusb/hid.c"));
-	config.include(source().join("hidapi"));
+	build.file(source().join("libusb/hid.c"));
+	build.include(source().join("hidapi"));
+	build.static_flag(true);
 
 	for path in pkg_config::find_library("libusb-1.0").unwrap().include_paths {
-		config.include(path.to_str().unwrap());
+		build.include(path.to_str().unwrap());
 	}
 
-	config.compile("libhidapi.a");
+	build.compile("libhidapi.a");
 
 	Ok(())
 }
 
 #[cfg(target_os = "windows")]
 fn build() -> io::Result<()> {
-	let mut config = gcc::Build::new();
+	let mut build = cc::Build::new();
 
-	config.file(source().join("windows/hid.c"));
-	config.include(source().join("hidapi"));
+	build.file(source().join("windows/hid.c"));
+	build.include(source().join("hidapi"));
+	build.static_flag(true);
 
-	config.compile("libhidapi.a");
+	build.compile("libhidapi.a");
 
 	Ok(())
 }