When set to Project Autobuild, an Autotools project will cause a rebuild to occur whenever a new file is opened in the Navigator window. This is completely unnecessary as no files have been changed.
A bug has been found in the code that was changing the CDT project file, every time a new file was brought up for selection. The project file was being changed because the ScannerInfoProvider was being set. This was done to handle the case whereby a New Project Wizard for Managed Make Projects selects the Autotools type. The code has been fixed to verify the ScannerInfoProvider before setting it to prevent unnecessary changes to the project description.