[libvirt] [PATCH 0/2] fix configure to require yajl if qemu is new enough

[Eric Blake]

After yet another debug session on IRC about failure to use qemu
because yajl-devel wasn't installed, I came up with these patches.
The first is just preparation (no change to generated code); and
with the second, I validated that uninstalling yajl-devel and then
trying to configure once again gives me the desired:

checking for yajl_tree_parse in -lyajl... no
configure: error: You must install the libyajl library & headers to compile libvirt

[I can't claim build-breaker or trivial rule for either of these
patches, but as I am also the autoconf guru around here, I won't
be surprised if the extent of other's reviews is "yep, I installed
it and it did what you said"...]

And yes, I tested on RHEL 5 that it still works with autoconf 2.59.

Eric Blake (2):
  build: avoid obsolete AC_HELP_STRING
  build: fix regression in requiring yajl for new enough qemu

 configure.ac        | 221 +++++++++++++++++++++++++++++++++++-----------------
 m4/virt-apparmor.m4 |   4 +-
 m4/virt-lib.m4      |  12 +--
 m4/virt-selinux.m4  |   3 +-
 4 files changed, 158 insertions(+), 82 deletions(-)

-- 
1.8.3.1