Note: This patch worked fine for me, but it is not very clean, and is provided here for educational purpose only. If you search a clean anti-aliasing patch, I'll suggest you to use gdkxft or GTK+ 2.*.
Note 2: The patch is seriously outdated and useless now. It will probably fail to work with modern configurations.
|The classic 'Hello World' program|
WARNING: After applying the patch, you may have to recompile Mozilla and/or Nautilus (if you use them), since these tools manipulates internal Gdk structures messed up with the apply of the patch. If one of your programs segfaults after applying it, first try to recompile it.