Peter Kuemmel authored Mar 18, 2012 and Brad King committed Mar 19, 2012

Don't forget the subdirectories.

Treat OBJECT libraries as STATIC libraries but leave out the archive
step.  The object files will be left behind for reference by other
targets later.

VS complains

 warning C4355: 'this' : used in base member initializer list

so initialize the member in the constructor body instead.

Bill Hoffman authored Mar 13, 2012 and Brad King committed Mar 16, 2012

This calls ConvertToOutputFormat on the PDB paths for pdb file paths
used in both library creation and the building of object files.