[Boost-build] toolset requirement

Subject: [Boost-build] toolset requirement
From: Deane Yang (deane.yang_at_[hidden])
Date: 2008-12-06 01:21:20

Should it be possible in a Jamfile to do something like this:

project
   : requirements
     <os>NT:<toolset>gcc
   ;

In other words, force the use of gcc when building on Windows.

I tried this, but got a message saying that this was an invalid value 
for toolset and the only valid value was msvc. What could cause this?