From: Art Cancro
Upgrading to a new version uses the same build procedure as
compiling
the program for a fresh install, except that you want to do make
-install-exec instead of make install. This will
+upgrade instead of make install. This will
overwrite the programs but not your data. Be sure to shut down
citserver during this process! If Citadel is running while you
upgrade, you may face data corruption issues.
After doing make install-exec, you should run setup +
After doing make upgrade, you should run setup again to bring your data files up to date. Please see the setup section below for more information on this.