Mark unused parameters

src/core/mac_startup.mm

@@ -159,7 +159,7 @@ QDebug operator<<(QDebug dbg, NSObject* object) {
 - (void)application:(NSApplication*)app openFiles:(NSArray*)filenames {
 
   qLog(Debug) << "Wants to open:" << filenames;
-  [filenames enumerateObjectsUsingBlock:^(id object, NSUInteger idx, BOOL* stop) {
+  [filenames enumerateObjectsUsingBlock:^(id object, NSUInteger, BOOL*) {
     [self application:app openFile:(NSString*)object];
   }];
 

src/core/macfslistener.mm

@@ -47,6 +47,10 @@ void MacFSListener::Init() { run_loop_ = CFRunLoopGetCurrent(); }
 
 void MacFSListener::EventStreamCallback(ConstFSEventStreamRef stream, void* user_data, size_t num_events, void* event_paths, const FSEventStreamEventFlags event_flags[], const FSEventStreamEventId event_ids[]) {
 
+  Q_UNUSED(stream);
+  Q_UNUSED(event_flags);
+  Q_UNUSED(event_ids);
+
   MacFSListener* me = reinterpret_cast<MacFSListener*>(user_data);
   char** paths = reinterpret_cast<char**>(event_paths);
   for (size_t i = 0; i < num_events; ++i) {

src/core/macsystemtrayicon.mm

@@ -206,5 +206,6 @@ void MacSystemTrayIcon::ClearNowPlaying() {
 }
 
 void MacSystemTrayIcon::SetNowPlaying(const Song& song, const QUrl& cover_url) {
+  Q_UNUSED(cover_url);
   p_->ShowNowPlaying(song.artist(), song.PrettyTitle());
 }