CC src/core/windows/SDL_xinput.o
In file included from src/core/windows/SDL_xinput.c:24:0:
src/core/windows/SDL_xinput.h:115:3: error: conflicting types for 'XINPUT_GAMEPAD_EX'
 } XINPUT_GAMEPAD_EX;
   ^~~~~~~~~~~~~~~~~
In file included from src/core/windows/SDL_xinput.h:29:0,
                 from src/core/windows/SDL_xinput.c:24:
C:/msys64/mingw64/x86_64-w64-mingw32/include/xinput.h:182:3: note: previous declaration of 'XINPUT_GAMEPAD_EX' was here
 } XINPUT_GAMEPAD_EX, *PXINPUT_GAMEPAD_EX;
   ^~~~~~~~~~~~~~~~~
In file included from src/core/windows/SDL_xinput.c:24:0:
src/core/windows/SDL_xinput.h:123:3: error: conflicting types for 'XINPUT_STATE_EX'
 } XINPUT_STATE_EX;
   ^~~~~~~~~~~~~~~
In file included from src/core/windows/SDL_xinput.h:29:0,
                 from src/core/windows/SDL_xinput.c:24:
C:/msys64/mingw64/x86_64-w64-mingw32/include/xinput.h:192:3: note: previous declaration of 'XINPUT_STATE_EX' was here
 } XINPUT_STATE_EX, *PXINPUT_STATE_EX;
   ^~~~~~~~~~~~~~~
make[2]: *** [Makefile:173: src/core/windows/SDL_xinput.o] Error 1
make[2]: Leaving directory '/home/me/hellcrawl/crawl-ref/source/contrib/sdl2'
make[1]: *** [Makefile:24: sdl2] Error 2
make[1]: Leaving directory '/home/me/hellcrawl/crawl-ref/source/contrib'
  * If you experience any problems building Crawl, please take a second look
  * at INSTALL.txt: the solution to your problem just might be in there!
make: *** No rule to make target '.contrib-libs', needed by 'contrib/install/x86_64-w64-mingw32/lib/libSDL2_image.a'.  Stop.