which version of SFML is required

[GregTaoo]

I failed to compile just now

obj/osu.o:osu.cpp:(.text+0x6cb): undefined reference to sf::Sprite::setTexture(sf::Texture const&, bool)'`

and so on. it showed me that some functions cannot be found anyway

collect2.exe: error: ld returned 1 exit status
mingw32-make: *** [Makefile:18: bin/bongo.exe] Error 1

[flower-alone]

See this #43