[Boost-build] explicit rule does not take conditional requirements

Subject: [Boost-build] explicit rule does not take conditional requirements
From: John Reid (j.reid_at_[hidden])
Date: 2011-05-10 08:24:54

Some of my tests run slowly in a debug build. I would like to be able to 
do something like:

explicit python_test_find_starts : <variant>:debug ;

so that they only run in release builds by default. Presumably I can do 
something like:

if <some condition to test build type here> {
     explicit python_test_find_starts ;
}

What can I use for the condition?

Thanks,
John.