Recompile multiple separate libs from one driver ?

[ghost]

Hi,

Given separate projects I need to convert to static libraries, I would like to have a root config that handle the recompilation of my multiple projects in different sub directories.

Layout:

-- Root config
-- Dir A
    -- project a
    -- sub config
-- Dir B
    -- project b
    -- sub config

Roof config would have compiler info and common needed files.
Running the root config would lead to recompilation of the childs that need it.
Ideally, I also need a Debug and Release build for each sub project.

Sub projects should also be able to compile without calling the root config.
Think the root config like a synchronizer that you use sometimes.

What is the most efficient way to do it using Meson ?

Thanks