When building shared utils modules or plugins, we should not link with
the static libraries built under src/, because that would mean we're
including their symbols as exported by the modules, and it'll break in
runtime.
Instead, just define the correct set of 'include_directories' to be
used in each plugin.
Fixes https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/436
To avoid those cases where a plugin does not need a helper library
an empty array is created.
However, when a helper library has to be built, it is not necessary
to include the created static library in an array.
`libmm-test-common` is created using underscores. It also uses
`gio-unix-2.0` as a public dependency but actually it should be
private.
Both issues have been fixed.
meson is a build system focused on speed an ease of use, which
helps speeding up the software development. This patch adds meson
support along autotools.