Moved dlopen implementation into wxDynamicLibrary.
Wrapped wxDllLoader in 2.2 compat guards and defined it in terms
of the new classes.
Added link option flags to wxDL and other missing functionality
previously implemented in wxDllLoader.
Modified wxDL++ classes to use wxDL base class implementation.
Replaced all uses of wxDllLoader in wx classes by the new
classes as appropriate.
def'd out (unimplemented) wxSystemSettingsBase so wxMSW would link.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13224 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
have user export syntax under win32 (unlike the old method which
had it's own uglyness though). Consider this a quickfix for win32,
will look at better solutions after some sleep.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13132 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775