lifecycle:
- clean

- configure
- compile (req. configure)
- dist (aka build)
- test (req. build)
- package (req. test)
- install (req. package)

./build.py reconfigure
./build.py build framework

module framework

inputs:
src: src/framework/*.cpp
headers: src/framework/*.hpp (build-time, consume-time)
headers: src/framework-private/*.hpp (build-time)
module: cfx2 (build-time, consume-time, run-time)
  implies: build-time (headers, link libs)
           consume-time (dist. headers)
           run-time (dist. DLL)
module: png (build-time, run-time)

outputs:
headers: build/framework-headers/
dependencies.txt (lists consume-time & run-time dependencies)
libs: framework.so
    OR
framework.a(carried dependency: png:build-time:libs)


consume framework
-> assimilate explicit consume-time dependencies
-> assimilate carried dependencies (=> add libpng if framework built as static lib)