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