Third-party libraries should support multiple toolsets

[resnikb@…]

When projects which use the same third-party library are compiled

with different compilers, the library compiled with the same compiler should be used. Currently, there is no way to specify, for example:

  using qt4 : C:/Qt4/VC8 : <toolset>msvc-8 ;
  using qt4 : C:/Qt4/VC6 : <toolset>msvc-6 ;

And have the appropriate settings used when projects are compiled

with MSVC8 and MSVC6 respectively.

Qt is just an example, this is an issue with all third-party libraries supported by Boost.Build.