Updated for Swift 5.4

Author: colemancda

Sources/BluetoothLinux/POSIXError.swift

@@ -44,11 +44,13 @@ public extension POSIXError {
 }
 
 internal extension POSIXErrorCode {
+    
     var errorMessage: String {
         return String(cString: strerror(rawValue), encoding: .utf8)!
     }
 }
 
+#if !swift(>=5.4)
 // MARK: - CustomStringConvertible
 
 // https://github.com/apple/swift/pull/24149
@@ -58,13 +60,6 @@ extension POSIXError: CustomStringConvertible {
         return _nsError.description
     }
 }
-
-#if os(macOS)
-extension POSIXErrorCode: CustomStringConvertible {
-    public var description: String {
-        return rawValue.description
-    }
-}
 #endif
 
 // MARK: - LocalizedError

Sources/BluetoothLinux/Scan.swift

@@ -80,8 +80,6 @@ public extension HostController {
         /// Otherwise, if flags is set to 0, then the results of previous inquiries may be returned, 
         /// even if the devices aren't in range anymore.
         case flushCache = 0x0001
-        
-        public static let allCases: Set<ScanOption> = [.flushCache]
     }
 
     struct InquiryResult {