HelenOS sources

_LARGEFILE64_SOURCE   65 uspace/lib/posix/include/posix/stdio.h #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
_LARGEFILE64_SOURCE   62 uspace/lib/posix/include/posix/sys/types.h #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
_LARGEFILE64_SOURCE  100 uspace/lib/posix/include/posix/unistd.h #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)

HelenOS homepage, sources at GitHub