Simplified process startup on macOS and Linux

Apple/Shared/Logging.swift

@@ -0,0 +1,19 @@
+import os
+@_exported import OSLog
+
+extension Logger {
+    private static let loggers: OSAllocatedUnfairLock<[String: Logger]> = OSAllocatedUnfairLock(initialState: [:])
+
+    public static let subsystem = Constants.bundleIdentifier
+
+    public static func logger(for type: Any.Type) -> Logger {
+        let category = String(describing: type)
+        let logger = loggers.withLock { loggers in
+            if let logger = loggers[category] { return logger }
+            let logger = Logger(subsystem: subsystem, category: category)
+            loggers[category] = logger
+            return logger
+        }
+        return logger
+    }
+}