importing variable into meson

[Zane Shelley]

I have a piece of code that will be included in multiple build 
environments: GNU make, ODE make (POWER FSP specific), and whatever we 
decide to use for OpenBMC. Previously, we have been able to manage which 
source files to build with a .mk file that simply has variables defined 
like:

src_files += source1.cpp
src_files += source2.cpp
src_files += source3.cpp
...

Then all we have to do is include those files in the makefiles. I am 
trying to find if tools like meson, or maybe cmake, can include the same 
files. Thoughts?


-- 
- Zane