Hi all. Please test the SConstruct2 file to see if it works as expected. It 
adds a few things to the build system. The most important for the users is 
that it does not autobuild stuff if it has not been asked to do so (via the 
build* options), even if the dependencies are present, and that it fails if 
something has been asked but the dependencies aren't met.
The file is not complete yet. One of the driving principles is the breakup of 
the huge SConstruct into several Sconscript files, and there are still stuff 
to be moved. Other stuff missing is the install target. Not all dependencies 
have been made hard requirements for each option.

However, I'd like you to test SConstruct2 because the amount of changes and 
code cleanup has become large enough, and done on separate periods that there 
is a very real possibility that I broke builds, specially on darwin and win32 
hosts with options I don't use. I would welcome all reports of failures. 
Particularly dubious is the CsoundVST build.

Saludos,
Felipe Sateler