Ok, so the current Felix builder is progressing.
At present the layout is:
ROOT/share/src # repository source
ROOT/share/lib # reorganised as library
ROOT/share/lib/rtl # shared C++ headers
ROOT/target/config # some config
ROOT/target/lib # platform depen
I am currently able to do this:
# build the Python based Felix
make build
# OSX bootstrap
make bootstrap
# upgrade
rm -rf build/release
mv build/trial build/release
# Again
make bootstrap
And so on, as many times as you like.
Running the bootstrap process takes the Python based build and use