I am using mingw32 gcc 4.8.1 as my compiler, and SFML does not provide a binary corresponding to it. So I followed the instruction and built SFML with cmake and mingw32-make.exe. However I realized one thing: different from the SFML library provided by the download page, there is no opengl module inside my lib folder anymore. Is it supposed to be like this? If not, how can I fix it? Thank you! (I'm still new to programming, so if I named anything wrong please forgive!)