when trying to install the
Guest Additions into the Fedora 15 VM instance in VirtualBox.
As part of the error message, it clearly indicated which package (a kernel-devel package) needs to be installed.
Then it reports the gcc is not found.
yum install gcc g++ seems to take care of this problem.
Take a few reboot and reinstallation to get it right
But Fedora is not working 100% in this VM environment. Sometimes part of the screen turns blue for no reason or when mouseover