• Chris Hanson - Xcode: Build numbers and versioning with agvtool

Xcode includes agvtool — "Apple-generic versioning tool" — in the /Developer/Tools directory, a useful utility that can be used to easily apply build numbers to your software.

(tags: xcode build cocoa osx)

• Easy iPhone Application Versioning with agvtool - Jamie’s Web Log

(tags: buildsystems cocoa osx xcode)

• Red Sweater Blog – Automatic Build Sub-Versioning in Xcode

(tags: svn xcode osx cocoa)