I’ve looked at the documentation, but it’s not obvious to me.
Our codebase has multiple libraries. A couple of them have a lot of source files and need to be updated often. Is it possible to enable a unity build just on specific targets?
So, if I have libraries A, B, and C part of this codebase. Can I have B be the only library to use a unity build?
There’s a target property for that, I believe it’s called UNITY_BUILD.
I think I might misunderstand how that property works. The documentation says to disable it if you want to disable unity builds even when a developer passes the unity option.
But, by default does CMake only perform a unity build based on targets?
For some reason, I had in my head it might combine the source for multiple targets. However, while typing this out I realize that decision wouldn’t make much sense at all.
I think you can also use that property to enable unity build for only some targets… But even if not, you could achieve the same effect by explicitly setting the UNITY_BUILD property to false for the targets you don’t want to build as unity.
Tried it. Got stuff to fix in our codebase first. There are a couple specific targets I wanted to try this on, but they are the ones that fail. I’m going to book mark this though. Thanks for the info.
you may simply add this line for the target you want to build this way:
set_target_properties(my_target PROPERTIES UNITY_BUILD ON)