We have a Makefile project with lots of make targets in it. All is fine, but when we add a new target and try to build 
it. It always seems to invoke "make all" from the root of the projet.

Investigation shows that new target have a different targetID then the restes of the targets. 

The functionning targets have:
   targetID="org.eclipse.cdt.build.MakeTargetBuilder">

But the new target has:
  targetID="com.qnx.tools.ide.qde.core.cbuilder">

Editing the .cprojet by hand to replace the targetId solves the problem.  Why is it doing that, how can I avoid this?