menu.cpp:(.text._ZN5CMenu11_buildMenusEv+0x130e): undefined reference to `background_png'
menu.cpp:(.text._ZN5CMenu11_buildMenusEv+0x1316): undefined reference to `background_png'
menu.cpp:(.text._ZN5CMenu11_buildMenusEv+0x132e): undefined reference to `background_png'
menu.cpp:(.text._ZN5CMenu11_buildMenusEv+0x1336): undefined reference to `background_png'
Qualcuno saprebbe aiutarmi?