Hi, during our work on making the Qt port of WebKit compile on Windows with MSVC and MingW g++ we ran into the following code in JavaScriptCore/API/JSStringRef.h: ... #if !defined(WIN32) && !defined(_WIN32) typedef unsigned short JSChar; #else typedef wchar_t JSChar; #endif ... JSChar being defined as wchar_t caused compiles problems for us inside WebCore itself when converting from JSChar to UChar. For now we added a || defined(__BUILDING_QT) to the condition, but we're wondering why JSChar is defined as wchar_t on Windows in the first place. We ran into this problem only when compiling with g++, MSVC seems to silently convert wchar_t to unsigned short. Unfortunately the svn history does not provide anything regard this #ifdef since it was added to the svn repository. Does anybody know/remember why JSChar is defined to wchar_t on Windows and if it is still needed? Simon