Closes#606
This lets the unit tests be runnable on linux. The change:
- Adds a linux-test makefile target so we can run the unit tests locally
- Fixes up some test code to work on Linux (mostly ifdefs)
- Runs the unit tests in CI now
Today our CI builds all of the linux code we have with musl and libc to
ensure everything is silky smooth. We should have a way to do the same
locally. This adds a new macOS only goal that spins up a container
(requires `container` to be installed) that builds an image with our
deps (libarchive and compression libs) and then builds the project. It
supports supplying whatever libc (musl or glibc) to verify they both
work.
Related to https://github.com/apple/containerization/issues/606
To make sure the project (and many linux specific libraries) builds on
linux lets add a linux step to build for both musl and glibc. Eventually
this will run unit tests as well. This change needs a bit more libc
agnostic-ifying work to make sure things work for both libcs.