I'm a recent vim convert (from fancy IDEs like eclipse.)

I love the :make command in vim and use it extensively; however I also like to edit multiple projects (with separate makefiles.)

So usually to edit more than one project I will do

pushd project1
vim project1.cpp
[suspend signal]
pushd ../project2
vim project2.cpp

and now I can switch between the two projects with ctrl+z i.e. suspend signal, and fg.

When this becomes an issue is when I want to open one project in the context of another so I can do copy/pasting. So if instead in the above I do

pushd project1
vim project1.cpp
:vsp ../project2/project2.cpp

I can edit both concurrently in the same vim process, however I can't effectively build one or the other with the :make command, it will only build project 1.

Does anyone have some kind of scheme that gives them the best of both worlds: being able to edit concurrently while still being able to build multiple projects with the :make command all from the same vim process?