I just switched to linux at home, installing FC6. I'm trying to get my network connection working with a D-Link DWL-G122 (B1) wireless, but have been unable to compile the driver module:

[Daniel@localhost Module]$ make -C /lib/modules/2.6.18-1.2798.fc6 SUBDIRS=$PWD modules
make: Entering directory `/lib/modules/2.6.18-1.2798.fc6'
make: *** No rule to make target `modules'. Stop.
make: Leaving directory `/lib/modules/2.6.18-1.2798.fc6

I saw the FC6 bugs page and figured out that Anaconda had installed the i586 kernel, so I installed the i686 kernel ...but didn't solve the problem. Any suggestions?

You have kernel-devel & kernel-headers installed also matching current running kernel. Also, at Fedora's update site is the latest kernel update 2.6.19-1.2895.fc6, you should manually download it and the matching kernel-devel and kernel-headers packages and install/upgrade them with command:

rpm -Uvh packagename

Replace "packagename" with actual name of package.

If you don't have kernel-devel or kernel-headers packages installed, you would have to install them (newer updates) with install command as such:

rpm -ivh packagename

If you are not sure if they are installed there will be a install.log file in /root with list of all installed packages in the order they were installed. If you selected "Development" category of packages during installation, they should be installed.
The reason I recommend applying the updated kernel packages is because usually they are better and you will have to re-compile your network drivers after updating them latter, so it is better to get that out of the way before compiling your net drivers.

You can post the errors here and someone can possibly assist, actually, it would be better to start a new thread for the gcc thing, but also do a search first through the search option in main menu on the right side of this page to find other threads with gcc errors, for keywords you may want to put down exact error message you got.

I installed the gcc packages without any trouble, but then got errors on the driver files... I've started a new thread for those, here.