Try building on OS X with libc++

This reverts commit ee70819f2b69d4bd0c9909d89c6b633f5065a1db.

CMakeLists.txt

@@ -16,6 +16,10 @@ if (CMAKE_CXX_COMPILER MATCHES ".*clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-uninitialized")
 endif ()
 
+if (APPLE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --stdlib=libc++")
+endif ()
+
 set(CMAKE_REQUIRED_FLAGS "-std=c++0x")
 check_cxx_source_compiles(
     "#include <unordered_map>

src/internet/cloudfileservice.h

@@ -3,6 +3,8 @@
 
 #include "internetservice.h"
 
+#include <memory>
+
 #include <QMenu>
 
 #include "core/tagreaderclient.h"
@@ -61,8 +63,8 @@ class CloudFileService : public InternetService {
   LibraryModel* library_model_;
   QSortFilterProxyModel* library_sort_model_;
 
-  boost::scoped_ptr<QMenu> context_menu_;
+  std::unique_ptr<QMenu> context_menu_;
-  boost::scoped_ptr<AlbumCoverManager> cover_manager_;
+  std::unique_ptr<AlbumCoverManager> cover_manager_;
   PlaylistManager* playlist_manager_;
   TaskManager* task_manager_;
 

src/internet/spotifyserver.cpp

@@ -99,12 +99,12 @@ void SpotifyServer::SetPlaybackSettings(pb::spotify::Bitrate bitrate, bool volum
 
 void SpotifyServer::MessageArrived(const pb::spotify::Message& message) {
   if (message.has_login_response()) {
-    const pb::spotify::LoginResponse& response = message.login_response();
+    const auto& response = message.login_response();
     logged_in_ = response.success();
 
     if (response.success()) {
       // Send any messages that were queued before the client logged in
-      foreach (const pb::spotify::Message& message, queued_messages_) {
+      for (const pb::spotify::Message& message : queued_messages_) {
         SendOrQueueMessage(message);
       }
       queued_messages_.clear();