For linux the mmap offset must also be page aligned, and we
need to disable macros like __FBSDID()
Change the linux osdep_uuidgen() to use more portable gettimeofday().
Reviewed by: marcel
native and foreign architectures and comparing products).
They eliminate most of the differences caused by different
object directory paths, timestamping, and identification.
(Note WORLDTMP was renamed to ${OBJTREE}${.CURDIR}/tmp.)