How to make the external libs only build once?

[UkonnRa]

Every time I change the code, I have to wait for a long time to build all the external libs(assimp, especially).
I hope you can try to avoid the unnecessary building work.

[Polytonic]

Hm, you shouldn't be recompiling dependencies on code changes -- does your development environment or text editor fiddle with files on save?

You'll have to link on each build, but that's a necessary consequence of static linking.