On latest svn (r1129) and some previous ones, installing ffado fails just after installing .desktop files. Here is the end of the output from 'scons install':
Install file: "support/mixer/ffadomixer" as "/usr/bin/ffadomixer"
xdg-desktop-menu install support/xdg/ffado.org-ffadomixer.desktop
xdg-icon-resource install --size 64 --context apps support/xdg/hi64-apps-ffado.png
scons: *** DirNodeInfo instance has no attribute 'csig'
scons: building terminated because of errors.
This doesn't seem to prevent ffado from installing and working. scons --version reports:
SCons by Steven Knight et al.:
engine: v0.97.0d20071203.r2509, 2007/12/03 20:20:38, by broonie on mercator
Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007 The SCons Foundation
The install was done on Ubuntu Hardy (8.04) with all latest updates.