[libvirt] BSD remote_protocol [was: [PATCH] build: mark conditionally unused variables]

[Eric Blake]

On 05/02/2013 06:38 AM, Roman Bogorodskiy wrote:
> 
> When configured with '--without-gnutls', it fails again in
> remote_protocol.c:
> 
> http://people.freebsd.org/~novel/misc/libvirt_remote_protocol_warns.txt

  CC       libvirt_driver_remote_la-remote_protocol.lo
cc1: warnings being treated as errors
./remote/remote_protocol.c: In function 'xdr_remote_node_get_cpu_stats_ret':
./remote/remote_protocol.c:530: warning: dereferencing type-punned
pointer will break strict-aliasing rules [-Wstrict-aliasing]

I suspect this is a macro expansion triggering the actual warning; can
you determine what the preprocessed text is that is behind this warning?
 I bet we can fix it in one or two places for all of the warnings
triggered on this file.

> 
> Going further and disabling remote results in another failure:
> 
> http://people.freebsd.org/~novel/misc/libvirt_node_devices_warns.txt

node_device/node_device_driver.c: In function 'update_caps':
node_device/node_device_driver.c:51: warning: statement with no effect

That comes from:
            detect_scsi_host_caps(&dev->def->caps->data);

which in turn shows up as this in node_device_driver.h:

#  define detect_scsi_host_caps(d)                      (-1)

I don't know why I'm not seeing the warning, but that one's easy to fix
- I can try to patch that one.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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