Please refer to the HTML documentation in doc/DocBook/html/single.html for instructions.
Note; to build it on modern Linux you'll need some older version of gcc to generate the .tu file, I used the gcc-5 binary, see site_scons/site_tools/tu.py, anything older that supports -fdump-translation-unit should do. The rest of the program can be built with normal gcc like this:
scons parts=debugger
scons parts=interceptor without_lavc=true # swy: skip the ffmpeg stuff
scons parts=docs
Keep in mind that scons parts=tests seems to have circular dependencies, but we don't care about that one.
To debug the SCons build scons --debug=stacktrace is useful.