Building Qemu 0.12.3 for Slackware 13 x86_64

The Qemu package slackbuild file from slackbuilds.org ( http://slackbuilds.org/repository/13.0/system/qemu/) by default compiles for x86 (i486) target. This will cause a build error on Slackware 13.0 x86_64 systems. In order to build the package from the source, you have to change the target in the slackbuild file to:

...
ARCH=${ARCH:-x86_64}
...

This way the package build should be successful in Slackware 13 x86_64 systems.