Thank you, now the game can pop up a black screen. The console said:
==> Performing warm boot.
-> Runtime directory is /home/unv/rhombihexadeltille-game/
-> Resource directory is /home/unv/rhombihexadeltille-game/
==> Running boot hooks.
==> Reloading foreign libraries.
-> Loading foreign library #<LIBRARY LIBSDL2-MIXER>.
-> Loading foreign library #<LIBRARY LIBSDL2-TTF>.
-> Loading foreign library #<LIBRARY LIBFFI>.
-> Loading foreign library #<LIBRARY LIBSDL2-IMAGE>.
-> Loading foreign library #<LIBRARY LIBSDL2>.
-> Loading foreign library #<LIBRARY OPENGL>.
==> Launching application.
debugger invoked on a SDL2::SDL-RC-ERROR in thread
#<THREAD "SDL2 Main Thread" RUNNING {10032B1793}>:
SDL Error (-1): That operation is not supported
The current thread is not at the foreground,
SB-THREAD:RELEASE-FOREGROUND has to be called in #<SB-THREAD:THREAD "main thread" RUNNING {10005B8083}>
for this thread to enter the debugger.
^C
debugger invoked on a SB-SYS:INTERACTIVE-INTERRUPT in thread
#<THREAD "main thread" RUNNING {10005B8083}>:
Interactive interrupt at #x7FC5AFD807FB.
Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.
restarts (invokable by number or by possibly-abbreviated name):
0: [EXIT ] Exit.
1: [ABORT] Exit from the current thread.
("bogus stack frame")
0]
I don’t know what is wrong. The error message is arcane to me. :(