With respect to the more than three years old grx 2.4.6 it contains, besides various corrections/improvements sent to the list

support for x86_64 compilers (basically a backport from MGRX)

....... DGA2 driver for linux/X11 SDL driver (both by Dimitar Zhekov)

The last driver works both in linux/x11 and win32/mingw32 systems It works both in full screen and in windowed modes, selected at run time either by setting GRX20DRV="sdl::fs" resp. "sdl::ww" or by program by using GrSetDriver(): see test/fswwtest.c

This driver is compiled separately from a special section of makedefs.grx, giving libraries libgrx20S which can coexist with libgrx20 (resp libgrx20X) on a given system: mingw (resp x11), and then be selected at link time of the application programs.

I justed packed everything together and checked ...

Maurice