preadv2
add package_blkid.m4 to the distributed files
Bunch of configure updates for xfsprogs to allow packages to better be kept in sync in this area. Add an aclocal.m4 build target for top level directory.
fix lib64 installs Merge of master-melb:xfs-cmds:25657a by kenmcd.
librt depends on libpthread. libxfs needs librt
detect blkid topology support in autoconf
Resolve build issues on Debian GNU/kFreeBSD port.
Add support for mlock / munlock.
Minor xfsprogs updates - add checks for pthreads lib, add missing stripe info init in libxfs_mount, testing script for large filesystems. Add in pthreads library checks.
xfsprogs: define umode_t for build if not defined already
xfsprogs: Automatic build dependency calculations
Merge over several portability changes from xfstest update.