How to integrate SCons and emacs + cedet without breaking semantic and auto-complete?
I don't think there exists SCons integration for cedet. However, it is easy to set up an EDE project manually.
An lisp-snippet for a C++-project is given below.
(ede-cpp-root-project "myProject"
:name "myProject"
:file "my_project.txt"
:include-path '("myproject/include")
:system-include-path '("/usr/include/c++/4.5.1"
"/usr/include/"))