[Boost-build] How to adjust/redefine default variants "debug", "release" and "profiling"

Subject: [Boost-build] How to adjust/redefine default variants "debug", "release" and "profiling"
From: Deniz Bahadir (D.Bahadir_at_[hidden])
Date: 2009-11-11 03:13:34

Hello everyone,

I have a short question concerning the default build variants "debug", "release", and "profiling":
  Is it possible to change some features for these default variants or add some new? (And how?)

I do not want to inherit these variants but instead change them directly.
For example, I like to add a preprocessor-define "DEBUG" to the debug variant, (but not to the others).

By searching this list I already found a way to change some of the default-settings by doing the following:
  # Rearrange default features to our specs
  import feature ;
  feature.set-default runtime-debugging : off ;
However, as far as I understand, this changes the default value globally for all three default variants and it seems not to be possible to do it just for one variant. I was also not able to add a preprocessor-define (at least globally to all variants) using this mechanism.

So hopefully someone can help me.

Thanks in advance,
DENIZ

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