editing rig is 95% there

My editing rig is 95% there, outside of not having the ability to render using h264. Also, I'm only able to export files greater than 2GB to tape. Apparently, this is a typical problem that should be resolved by using some compiler flags (-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE). However, the compiler flags did not work, so I was just reading up on this thread: http://www.google.com/search?hl=en&q=reading+files+larger+than+2gb+cflags+D_LARGEFILE_SOURCE

that states that my system needs to support the following calls: mmap64, sendfile64, sendfilev64, mkstemp64. I will also try to pass --enable-lfs to configure.