[Libguestfs] about libguestfs 'AVAILABILITY'

Hi all: I installed libguestfs-1.29.40 on both ubuntu 12.04 and ubuntu 14.04. Both of them have the same problems,It is about the 'AVAILABILITY' . I build libguestfs by tarball , everything is ok except the commond : make check . on ubuntu 12.04 the error is md_create: feature 'mdadm' is not available in this build of libguestfs. Read 'AVAILABILITY' in the guestfs(3) man page for how to check for the availability of features. at /usr/Libvmi/libguestfs-1.29.40/tests/guests/guest-aux/make-fedora-img.pl line 103. /usr/Libvmi/libguestfs-1.29.40/run: command failed with exit code 2 make[2]: *** [stamp-fedora-md.img] Error 2 make[2]: Leaving directory `/usr/ /libguestfs-1.29.40/tests/guests' make[1]: *** [check-am] Error 2 make[1]: Leaving directory `/usr/Libvmi/libguestfs-1.29.40/tests/guests' on ubuntu 14.04 the error is feature 'lvm2' is not available in this build of libguestfs. Read 'AVAILABILITY' in the guestfs(3) man page for how to check for the availability of features. then I execute :libguestfs-test-tool there is something wrong I execute make quickcheck there is something wrong too! I just I have no idea about the 'AVAILABILITY' problems . I will be very excited if the problem can be solved. thanks again ! hope you have a good day! sincerely