[boost] setting option specific for compiler in Jamfile

Subject: [boost] setting option specific for compiler in Jamfile
From: Oliver Kowalke (oliver.kowalke_at_[hidden])
Date: 2014-03-19 04:50:53

How can I apply an option in Jamfile which applies only for toolset-version
onward?

instead of writing:

 <toolset>gcc-4.7:<cxxflags>-fxyz
 <toolset>gcc-4.8:<cxxflags>-fxyz
 <toolset>gcc-4.9:<cxxflags>-fxyz

I'd like to have a single line.

 <toolset>gcc-greater-eqal-4.7:<cxxflags>-fxyz

best regards,
Oliver