Hi all, Just to let you know, I finally got PJSIP compile con Snow Leopard and 64bits :) These steps should be followd to achieve it: - Download portaudio r1420 (latest trunk nowadays) this can be done with svn propedit svn:externals . in the thirdparty folder, and then svn up. - Apply the following patch: http://music.columbia.edu/pipermail/portaudio/attachments/20091110/c438cb8f/attachment.obj - Edit the user.mak file and add -arch x86_64 CFLAG. That's all! -- Saul Ibarra Corretge AG Projects