Merge pull request #5 from Boddlnagg/other-os

Build nothing on non-Apple systems

Cargo.toml

@@ -1,14 +1,14 @@
 [package]
 name = "coremidi-sys"
-version = "2.0.0"
+version = "2.0.2"
 authors = ["Jonas Klesy", "Patrick Reisert"]
 description = "Low-level FFI bindings for the CoreMIDI framework"
 license = "MIT"
 repository = "https://github.com/jonas-k/coremidi-sys"
 documentation = "https://docs.rs/coremidi-sys"
 categories = ["external-ffi-bindings", "multimedia::audio"]
 
-[dependencies]
+[target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
 core-foundation-sys = "0.2"
 
 [package.metadata.docs.rs]

build.rs

@@ -1,3 +1,5 @@
 fn main() {
-    println!("cargo:rustc-link-lib=framework=CoreMIDI");
+    if std::env::var("TARGET").expect("cannot read TARGET environment variable").contains("apple") {
+        println!("cargo:rustc-link-lib=framework=CoreMIDI");
+    }
 }

src/lib.rs

@@ -1,3 +1,5 @@
+#![cfg(any(target_os = "macos", target_os = "ios"))]
+
 #![allow(non_snake_case, non_upper_case_globals, non_camel_case_types)]
 
 extern crate core_foundation_sys;
@@ -13,7 +15,7 @@ include!("generated.rs");
 pub unsafe fn MIDIPacketNext(pkt: *const MIDIPacket) -> *const MIDIPacket {
     let ptr = &(*pkt).data as *const u8;
     let offset = (*pkt).length as isize;
-    if cfg!(target_arch = "arm") {
+    if cfg!(any(target_arch = "arm", target_arch = "aarch64")) {
         // MIDIPacket must be 4-byte aligned on ARM
         ((ptr.offset(offset + 3) as usize) & !(3usize)) as *const MIDIPacket
     } else {