Support of macOS arm64

build.sbt

@@ -52,7 +52,14 @@ inThisBuild(
       if (isSnapshot.value) Some("snapshots" at nexus + "content/repositories/snapshots")
       else Some("releases" at nexus + "service/local/staging/deploy/maven2")
     },
-    nativeArch := "x86_64",
+    nativeArch := {
+      System.getProperty("os.arch") match {
+        case "amd64" =>
+          "x86_64"
+        case arch =>
+          arch
+      }
+    },
     nativeCompiler := "gcc",
     nativeCompileOptions := "-shared" :: "-O2" :: "-Wall" :: "-Wextra" :: Nil,
     nativePlatform := (System.getProperty("os.name").head.toLower match {

src/main/java/org/scalasbt/ipcsocket/NativeLoader.java

@@ -23,12 +23,18 @@ class NativeLoader {
   private static final boolean isMac;
   private static final boolean isLinux;
   private static final boolean isWindows;
+  private static final String arch;
 
   static {
     final String os = System.getProperty("os.name", "").toLowerCase();
     isMac = os.startsWith("mac");
     isLinux = os.startsWith("linux");
     isWindows = os.startsWith("windows");
+    String maybeArch = System.getProperty("os.arch", "");
+    if ("amd64".equals(maybeArch)) {
+      maybeArch = "x86_64";
+    }
+    arch = maybeArch;
   }
 
   private static final String pid =
@@ -40,18 +46,14 @@ private static String tmpDirLocation() {
 
   static void load() throws UnsatisfiedLinkError {
     if (!loaded.get()) {
-      final String os = System.getProperty("os.name", "").toLowerCase();
-      final boolean isMac = os.startsWith("mac");
-      final boolean isLinux = os.startsWith("linux");
-      final boolean isWindows = os.startsWith("windows");
       final boolean is64bit = System.getProperty("sun.arch.data.model", "64").equals("64");
       String tmpDir = tmpDirLocation();
       if (is64bit && (isMac || isLinux || isWindows)) {
         final String extension = "." + (isMac ? "dylib" : isWindows ? "dll" : "so");
         final String libName = (isWindows ? "" : "lib") + "sbtipcsocket" + extension;
         final String prefix = isMac ? "darwin" : isLinux ? "linux" : "win32";
 
-        final String resource = prefix + "/x86_64/" + libName;
+        final String resource = prefix + "/" + arch + "/" + libName;
         final URL url = NativeLoader.class.getClassLoader().getResource(resource);
         if (url == null) throw new UnsatisfiedLinkError(resource + " not found on classpath");
         try {