This brief tutorial will show you how to install VirtualBox Guest Additions on OpenSUSE 12.2 32 bit Gnome Edition. I got the following error when I tried to install Guest Additions on OpenSUSE 12.2 Gnome edition.
To solve the problems, we need to install several packages before installing Guest Additions. Execute this command on Terminal as root to install required packages.
zypper install gcc kernel-devel make
After that, we can re-install Guest Additions.
First, mount the Guest Additions. Go to Devices > Install Guest Additions from the Virtualbox guest window.
Then switch to OpenSUSE virtual machine and double click the file autorun.sh.
Then select run in Terminal and Enter your root password when asked.