I finally got Audacity (both stable 1.2.6 and beta 1.3.7) compiled and working on Solaris 10, albeit with some minor remaining issues. While 1.3.8 is already out, I opted not to compile it since I had already started working with 1.3.7 and 1.3.8 is also the first release after the project's announcement that PortAudio v18 was no longer supported in the 1.3 branch. We need PortAudio v18 to support Solaris audio framework since Solaris 10 does not have OSS support, at least for Sun Ray. These packages should also work on OpenSolaris, using the legacy Solaris audio interfaces.
Click here for the SVR4 package downloads and a README file with dependency and known issue information. As with the VLC package from a few days ago, dependencies are not included, and I would appreciate if someone would be willing to mirror these files.