Investigate other package managers

[ekilmer]

vcpkg is nice when everything is packaged correctly, however it is very difficult to share the result of a single pre-compiled package with someone else to install into their existing set of packages. This design is nice to ensure maximum compatibility for a single machine by hashing almost every component that goes into building the package (compiler, source code, patches, cmake scripts, dependencies, etc.), but it is very difficult to share pre-compiled packages by themselves.

On the other hand, package managers like Homebrew get away with compiling a package once (and any dependencies) and distributing the result to all macOS users on the same OS version. Mac is relatively easy to do this because there is really only a single target operating system. Linux is more difficult if you aren't careful about libc and lib(std)c++ compatibilities, but Homebrew seems to support Linux, and we could only officially target Ubuntu 20.04.

The nice thing about vcpkg is that you only need to specify the CMAKE_TOOLCHAIN_FILE to choose which dependency set you'd like to compile against. With Homebrew, it's more of a global installation (kind of), which would require manually specifying package directories like -DLLVM_DIR=/usr/local/opt/llvm...