How to do verbose compilation


We are looking for some compilation problem (files that are never 'up-to-date').

For this we need verbose compilation log.

I tied adding to external build '-verbose' (javac option) but it is  ignored - or maybe it is filtered by IDEA,

My questions -

  1. How I turn on compiler log - I know it is log4j but I don't know how to do it and where
  2. How to perform verbose compilation.

May thanks

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