Added LDFLAGS note to Raspberry Pi documentation (thanks, Michael!).

x11: Drop duplicate XInput2 XI_RawMotion events. This happens when the pointer is grabbed, but it's not clear if this is a bug in x.org or my misunderstanding of the XGrabPointer() documentation. At any rate, we'll want to revisit this later for a better solution. Fixes Bugzilla #2963.

Unix: Don't send quit events during signal handler. Make note to send it, and send next time we SDL_PumpEvents(). Otherwise, we might be trying to use malloc() to push a new event on the queue while a signal is interrupting malloc() elsewhere, usually causing a crash. Fixes Bugzilla #2870.

Updated configure script.

configure/cmake/x11: Removed SDL_VIDEO_DRIVER_X11_CONST_PARAM_XDATA32 test. This was the only thing that made SDL_config.h generate differently between 32 and 64-bit versions of Linux, so instead we force a function cast in our X11 code to match our dynamic loader version, which removes the compile error on some machines that prompted this test in the first place. Xlib never wrote to this data, so if you're on an older Xlib where this param wasn't const, your data should still be intact when we force the caller to think it was actually const after all. Fixes Bugzilla #1893.

CMake: default to shared library builds being enabled.

Let's assume that if VS2005 and VS2010 do it, VS2008 probably does, too.

VS2005 tweaks (thanks, Ozkan!). Fixes Bugzilla #2895. His notes: The following trivial changes make SDL2 tree (mostly) compatible with Visual Studio 2005: * SDL_stdlib.c: Similar to VS2010 and newer, VS2005 also generates memcpy(), (it also generates memset(), see below), so propagate the #if condition to cover VS2005. * SDL_pixels.c (SDL_CalculateGammaRamp): VS2005 generates a memset() call for gamma==0 case, so replace the if loop with SDL_memset(). * SDL_windowsvideo.h: Include msctf.h only with VS2008 and newer, otherwise include SDL_msctf.h * SDL_windowskeyboard.c: Adjust the #ifdefs so that SDL_msctf.h inclusion is always recognized correctly.

Maybe patched to compile on some Windows configurations. (Maybe) Fixes Bugzilla #3001.

Backed out changeset c9c61d66cfa0 This caused Bugzilla #2963, so we'll find a better solution.