It was just a guess, I have no idea actually why it's complaining. I think that use of functions like this should be hidden from the user, and I shouldn't have to mind about where different functions are located just because boost cannot find them, so I hope it's not the meaning that I should include these headers myself.

According to the top of this page, boost it may or may not work on the MSYS command shell, but I guess that doesn't mean that boost won't support mingw even if the normal command shell is used. I did have MSYS installed, although I compiled from the normal command shell. I don't know if this could have affected in any way.

Thanks anyway. Maybe mingw works with boost after all, just that I have done something wrong.

-Kristofer