[libvirt] [PATCH] [Build-breaker : 1.2.12] Suppress compilation without dbus headers

[Daniel P. Berrange]

On Sun, Jan 25, 2015 at 05:56:25PM +0530, Prerna Saxena wrote:
> Hi,
> While testing 1.2.12 rc2 on Powerpc, Fedora 21, I hit a bunch of build failures in absence of dbus-devel :
> 
> src/util/virsystemd.c:284:17: note: in expansion of macro 'STREQ_NULLABLE'
>              if (STREQ_NULLABLE("org.freedesktop.DBus.Error.UnknownMethod",
>                  ^
> ....
> src/util/virsystemd.c:288:17: error: implicit declaration of function 'dbus_error_free' [-Werror=implicit-function-declaration]
>                  dbus_error_free(&error);
> 
> 
> Found that this was because commit 318df5a05 needs Dbus libraries for compilation, and configure didnt mark "with_dbus" to be mandatory. In this case, the compilation itself failed in a much uglier
> fashion on my system where dbus-devel was absent.
> 
> The following patch introduces a compile error when dbus-devel is absent, so that the build itself proceeds later without cryptic errors.
> 
> This has also been reported on the list : https://www.redhat.com/archives/libvir-list/2015-January/msg00641.html

I've already posted a fix for this problem

https://www.redhat.com/archives/libvir-list/2015-January/msg00869.html

Regards,
Daniel
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