ISO C++ does not support 'long long'

[Michael ODonnell]

It depends on a number of factors like which compiler version
you're using (try "cc --version" to find out) and how badly
written that code is.  You'll probbaly get a lot farther if
you get your build to stop using "-pedantic" but that's not an
all-purpose solution and removing it may even allow genuinely
bad code to be compiled.  Worth a shot, though...