$ make

//A bunch of compiling stuff went here, but was removed for brevity
hwengine.pas(155,5) Note: Local variable "prevFocusState" not used
Linking ../bin/hwengine
/usr/bin/ld: warning: ../bin/link.res contains output sections; did you forget -T?
../bin/../bin/hwengine.o: In function `P$HWENGINE_DOTIMER$LONGINT':
hwengine.pas:(.text+0x1dd): undefined reference to `SDL_GL_SwapWindow'
../bin/../bin/hwengine.o: In function `P$HWENGINE_ONDESTROY':
hwengine.pas:(.text+0x3f8): undefined reference to `SDL_GL_DeleteContext'
hwengine.pas:(.text+0x405): undefined reference to `SDL_DestroyWindow'
../bin/../bin/SDLh.o: In function `SDLH_SDL_WARPMOUSE$WORD$WORD':
SDLh.pas:(.text+0x16): undefined reference to `SDL_WarpMouseInWindow'
../bin/../bin/uMisc.o: In function `UMISC_INITMODULE':
uMisc.pas:(.text+0x5e2): undefined reference to `SDL_AllocFormat'
../bin/../bin/uMisc.o: In function `UMISC_FREEMODULE':
uMisc.pas:(.text+0x60d): undefined reference to `SDL_FreeFormat'
../bin/../bin/uStore.o: In function `USTORE_SETUPOPENGL':
uStore.pas:(.text+0x2e9b): undefined reference to `SDL_GL_CreateContext'
uStore.pas:(.text+0x2ec4): undefined reference to `SDL_GL_SetSwapInterval'
../bin/../bin/uStore.o: In function `USTORE_ADDPROGRESS':
uStore.pas:(.text+0x38c7): undefined reference to `SDL_GL_SwapWindow'
../bin/../bin/uStore.o: In function `USTORE_CHFULLSCR$SHORTSTRING':
uStore.pas:(.text+0x4573): undefined reference to `SDL_CreateWindow'
uStore.pas:(.text+0x45a3): undefined reference to `SDL_CreateWindow'
../bin/../bin/uKeys.o: In function `UKEYS_PROCESSKBD':
uKeys.pas:(.text+0x109): undefined reference to `SDL_GetKeyboardState'
../bin/../bin/uKeys.o: In function `UKEYS_RESETKBD':
uKeys.pas:(.text+0x6a9): undefined reference to `SDL_GetKeyboardState'
../bin/../bin/uKeys.o: In function `UKEYS_INITKBDKEYTABLE':
uKeys.pas:(.text+0xb65): undefined reference to `SDL_GetKeyboardState'
hwengine.pas(527,1) Error: Error while linking
hwengine.pas(527,1) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted
Error: /usr/bin/ppcx64 returned an error exitcode (normal if you did not specify a source file to be compiled)
make[2]: *** [bin/hwengine] Error 1
make[1]: *** [hedgewars/CMakeFiles/hwengine.dir/all] Error 2
make: *** [all] Error 2