[CMake] How do static libraries get linked in Ninja?

[Robert Dailey]

I have two targets in CMake: a static library and a shared library.
The shared library specifies the static library as a target link
library.

When I generate for Ninja, and I run:

$ ninja -v

During the link command for the shared library, I do not see the
static library specified to g++. I do see *.so files, but not *.a
files. Why are static libraries not showing up on the command line for
the link step? There must be some black magic happening that I'm not
seeing...