large file problems on 32-bit linux

[throwaway-zz]

Large file problems again, this time on 32-bit Linux instead of 64-bit. Again, the solution is pretty simple:

CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

I tried putting these defines in common.h, but of course it doesn't get included in the right order for that to work. So I set CFLAGS before calling cmake. Presumably the right way to do this would be to put it in CMakeLists.txt, but I don't know cmake very well.

[coryLeahcordero811]

#11