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Description of problem:
When compiling libvirt-0.9.2-1.el6.src.rpm on x86_64 machine, it produced the following error informations

...
  CC     libvirt_driver_qemu_la-qemu_monitor_json.lo
  CC     libvirt_driver_qemu_la-qemu_driver.lo
qemu/qemu_monitor_json.c: In function 'qemuMonitorJSONAddDrive':
qemu/qemu_monitor_json.c:2468: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
  CC     libvirt_driver_qemu_la-qemu_bridge_filter.lo
  CC     libvirt_driver_lxc_la-lxc_conf.lo
...


Version-Release number of selected component (if applicable):
libvirt-0.9.2-1.el6.src.rpm

How reproducible:
always

Steps to Reproduce:
1.install the libvirt-0.9.2-1.el6.src.rpm
2. cd /root/rpmbuild/SPECS
3. rpmbuild -bb libvirt.spec

  
Actual results:
it showed warning info.

Expected results:
no warning info.

Additional info:

Created attachment 505917 [details]
proposed patch

I tried to initialize the ret variable to -1, it works.

Confirmed; the bug is RHEL-specific, due to a flaw in the libvirt-Support-virtio-disk-hotplug-in-JSON-mode.patch

I've incorporated Gunannan's patch into this respin:
http://post-office.corp.redhat.com/archives/rhvirt-patches/2011-June/msg00349.html

I missed this when doing the rebase for libvirt-0.9.2-1.el6, it will be
in the next build,

Daniel

This bug has been verified on libvirt-0.9.3-1.el6.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2011-1513.html