We are using the openSUSE build service to build binaries (x86 and x86_64) for our installers.

You can operate it via webinterface:

https://build.opensuse.org/

or comand line interface:

http://en.opensuse.org/Build_Service/CLI

Get the osc client from here:

https://forgesvn1.novell.com/svn/opensuse/trunk/buildservice/src/clientlib/python/osc/

====== Disable automatic stripping of debug symbols ======
<code>
%install
export NO_BRP_STRIP_DEBUG="true"
</code>