basicinlines.h is only included in m_fixed.h, while basictypes.h is included only in headers, so it's better to respect this convention. OSX compiles fine also without m_fixed.h, even better.
- Replaced GTK/OS X (note different from Cocoa) clipboard code with SDL clipboard API.
- Removed requirement to link to GTK in order to compile with GTK support.
- GTK is no longer init'd if the GTK IWAD picker is not used.
- Our usage of GTK is such that the dynamic loader can work with both GTK2 and GTK3 depending on what's installed.
- Since we're accumulating a lot of library loaders I've built a generic interface as FModule which replaces TOptWin32Proc and the loaders in the OpenAL and Fluidsynth code.
The only reason this even existed was that ZDoom's original VC projects used __fastcall. The CMake generated project do not, they stick to __cdecl.
Since no performance gain can be seen by using __fastcall the best course of action is to just remove all traces of it from the source and forget that it ever existed.
Patched up everything so that it compiles without errors again. This only addresses code related to some compile error. A large portion of the angle code still uses angle_t and converts back and forth.
- Reuse the old window in the SDL backend since in some instances switching windows causes issues (OS X fullscreen for instance (while using the SDL backend of course)).
- Clear the SDL render before copying in the framebuffer to remove HOM-like effect.
This helps the crash catcher when there are numerous wad files, for which it's possible that either the wad list, the map or the position is truncated. A more reliable alternative to this should be allocating the char buffer, but I never heard about a way to do this reliably during signal handling.
