diff --git a/Source/JavaScriptCore/API/JSStringRef.cpp b/Source/JavaScriptCore/API/JSStringRef.cpp
index 812f3d413..77a3fd0f4 100644
--- a/Source/JavaScriptCore/API/JSStringRef.cpp
+++ b/Source/JavaScriptCore/API/JSStringRef.cpp
@@ -37,7 +37,7 @@ using namespace WTF::Unicode;
 JSStringRef JSStringCreateWithCharacters(const JSChar* chars, size_t numChars)
 {
     initializeThreading();
-    return OpaqueJSString::create(chars, numChars).leakRef();
+    return OpaqueJSString::create(reinterpret_cast<const UChar*>(chars), numChars).leakRef();
 }
 
 JSStringRef JSStringCreateWithUTF8CString(const char* string)
@@ -62,7 +62,7 @@ JSStringRef JSStringCreateWithUTF8CString(const char* string)
 JSStringRef JSStringCreateWithCharactersNoCopy(const JSChar* chars, size_t numChars)
 {
     initializeThreading();
-    return OpaqueJSString::create(StringImpl::createWithoutCopying(chars, numChars, WTF::DoesNotHaveTerminatingNullCharacter)).leakRef();
+    return OpaqueJSString::create(StringImpl::createWithoutCopying(reinterpret_cast<const UChar*>(chars), numChars, WTF::DoesNotHaveTerminatingNullCharacter)).leakRef();
 }
 
 JSStringRef JSStringRetain(JSStringRef string)
@@ -83,7 +83,7 @@ size_t JSStringGetLength(JSStringRef string)
 
 const JSChar* JSStringGetCharactersPtr(JSStringRef string)
 {
-    return string->characters();
+    return reinterpret_cast<const JSChar*>(string->characters());
 }
 
 size_t JSStringGetMaximumUTF8CStringSize(JSStringRef string)
diff --git a/Source/JavaScriptCore/runtime/DateConversion.cpp b/Source/JavaScriptCore/runtime/DateConversion.cpp
index 0b57f012d..05e27338b 100644
--- a/Source/JavaScriptCore/runtime/DateConversion.cpp
+++ b/Source/JavaScriptCore/runtime/DateConversion.cpp
@@ -107,7 +107,8 @@ String formatDateTime(const GregorianDateTime& t, DateTimeFormat format, bool as
 #if OS(WINDOWS)
             TIME_ZONE_INFORMATION timeZoneInformation;
             GetTimeZoneInformation(&timeZoneInformation);
-            const WCHAR* timeZoneName = t.isDST() ? timeZoneInformation.DaylightName : timeZoneInformation.StandardName;
+            const WCHAR* winTimeZoneName = t.isDST() ? timeZoneInformation.DaylightName : timeZoneInformation.StandardName;
+            String timeZoneName(reinterpret_cast<const UChar*>(winTimeZoneName));
 #else
             struct tm gtm = t;
             char timeZoneName[70];
diff --git a/Source/WTF/WTF.pri b/Source/WTF/WTF.pri
index 1f4866d66..bb61e4ba3 100644
--- a/Source/WTF/WTF.pri
+++ b/Source/WTF/WTF.pri
@@ -12,7 +12,7 @@ mac {
     # Mac OS does ship libicu but not the associated header files.
     # Therefore WebKit provides adequate header files.
     INCLUDEPATH = $${ROOT_WEBKIT_DIR}/Source/WTF/icu $$INCLUDEPATH
-    LIBS += -licucore
+    LIBS += /usr/lib/libicucore.dylib
 } else:!use?(wchar_unicode): {
     win32 {
         CONFIG(static, static|shared) {
diff --git a/Source/WTF/wtf/TypeTraits.h b/Source/WTF/wtf/TypeTraits.h
index 9df2c95cf..f5d6121fd 100644
--- a/Source/WTF/wtf/TypeTraits.h
+++ b/Source/WTF/wtf/TypeTraits.h
@@ -72,6 +72,9 @@ namespace WTF {
     template<> struct IsInteger<unsigned long>      { static const bool value = true; };
     template<> struct IsInteger<long long>          { static const bool value = true; };
     template<> struct IsInteger<unsigned long long> { static const bool value = true; };
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) || (defined(_HAS_CHAR16_T_LANGUAGE_SUPPORT) && _HAS_CHAR16_T_LANGUAGE_SUPPORT)
+    template<> struct IsInteger<char16_t>           { static const bool value = true; };
+#endif
 #if !COMPILER(MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
     template<> struct IsInteger<wchar_t>            { static const bool value = true; };
 #endif
diff --git a/Source/WebCore/plugins/qt/PluginPackageQt.cpp b/Source/WebCore/plugins/qt/PluginPackageQt.cpp
index a923d49aa..46772a4bb 100644
--- a/Source/WebCore/plugins/qt/PluginPackageQt.cpp
+++ b/Source/WebCore/plugins/qt/PluginPackageQt.cpp
@@ -136,7 +136,11 @@ static void initializeGtk(QLibrary* module = 0)
         }
     }
 
+#ifdef NIXPKGS_LIBGTK2
+    QLibrary library(QLatin1String(NIXPKGS_LIBGTK2), 0);
+#else
     QLibrary library(QLatin1String("libgtk-x11-2.0"), 0);
+#endif
     if (library.load()) {
         typedef void *(*gtk_init_check_ptr)(int*, char***);
         gtk_init_check_ptr gtkInitCheck = (gtk_init_check_ptr)library.resolve("gtk_init_check");
diff --git a/Source/WebCore/plugins/qt/PluginViewQt.cpp b/Source/WebCore/plugins/qt/PluginViewQt.cpp
index de06a2fea..86fe39ef1 100644
--- a/Source/WebCore/plugins/qt/PluginViewQt.cpp
+++ b/Source/WebCore/plugins/qt/PluginViewQt.cpp
@@ -697,7 +697,11 @@ static Display *getPluginDisplay()
     // support gdk based plugins (like flash) that use a different X connection.
     // The code below has the same effect as this one:
     // Display *gdkDisplay = gdk_x11_display_get_xdisplay(gdk_display_get_default());
+#ifdef NIXPKGS_LIBGDK2
+    QLibrary library(QLatin1String(NIXPKGS_LIBGDK2), 0);
+#else
     QLibrary library(QLatin1String("libgdk-x11-2.0"), 0);
+#endif
     if (!library.load())
         return 0;
 
diff --git a/Source/WebKit2/PluginProcess/qt/PluginProcessMainQt.cpp b/Source/WebKit2/PluginProcess/qt/PluginProcessMainQt.cpp
index 8de65216b..38f5c05e5 100644
--- a/Source/WebKit2/PluginProcess/qt/PluginProcessMainQt.cpp
+++ b/Source/WebKit2/PluginProcess/qt/PluginProcessMainQt.cpp
@@ -53,7 +53,11 @@ static void messageHandler(QtMsgType type, const QMessageLogContext&, const QStr
 
 static bool initializeGtk()
 {
+#ifdef NIXPKGS_LIBGTK2
+    QLibrary gtkLibrary(QLatin1String(NIXPKGS_LIBGTK2), 0);
+#else
     QLibrary gtkLibrary(QLatin1String("libgtk-x11-2.0"), 0);
+#endif
     if (!gtkLibrary.load())
         return false;
     typedef void* (*gtk_init_ptr)(void*, void*);
diff --git a/Source/WebKit2/Shared/API/c/WKString.cpp b/Source/WebKit2/Shared/API/c/WKString.cpp
index cbac67dd8..23400a64e 100644
--- a/Source/WebKit2/Shared/API/c/WKString.cpp
+++ b/Source/WebKit2/Shared/API/c/WKString.cpp
@@ -55,7 +55,7 @@ size_t WKStringGetLength(WKStringRef stringRef)
 size_t WKStringGetCharacters(WKStringRef stringRef, WKChar* buffer, size_t bufferLength)
 {
     COMPILE_ASSERT(sizeof(WKChar) == sizeof(UChar), WKStringGetCharacters_sizeof_WKChar_matches_UChar);
-    return (toImpl(stringRef)->getCharacters(static_cast<UChar*>(buffer), bufferLength));
+    return (toImpl(stringRef)->getCharacters(reinterpret_cast<UChar*>(buffer), bufferLength));
 }
 
 size_t WKStringGetMaximumUTF8CStringSize(WKStringRef stringRef)
diff --git a/Source/WebKit2/WebProcess/Plugins/Netscape/x11/NetscapePluginX11.cpp b/Source/WebKit2/WebProcess/Plugins/Netscape/x11/NetscapePluginX11.cpp
index d734ff684..0f6ff63d1 100644
--- a/Source/WebKit2/WebProcess/Plugins/Netscape/x11/NetscapePluginX11.cpp
+++ b/Source/WebKit2/WebProcess/Plugins/Netscape/x11/NetscapePluginX11.cpp
@@ -64,7 +64,11 @@ static Display* getPluginDisplay()
     // The code below has the same effect as this one:
     // Display *gdkDisplay = gdk_x11_display_get_xdisplay(gdk_display_get_default());
 
+#ifdef NIXPKGS_LIBGDK2
+    QLibrary library(QLatin1String(NIXPKGS_LIBGDK2), 0);
+#else
     QLibrary library(QLatin1String("libgdk-x11-2.0"), 0);
+#endif
     if (!library.load())
         return 0;