Eclipse 3.7.0 Indigo with CDT shows many false compilation errors

Question

I have updated my Ubuntu box to 11.10 and then Eclipse also have been updated to 3.7.0 Indigo with CDT 8.0.1

Then the following problem occurs:

Answer 1

Updated index option to active build configuration works for me,

also I removed some files from the file list of being indexed up-front,