Besides CMake, Bazel, and Conan, what build system or related project(s) are worth looking at? Which one(s) would you recommend? (See other threads as well)
It's bazel-like, in C++, so you can have a binary tool, and it outputs ninja build files.
https://chromium.googlesource.com/chromium/src/tools/gn/
https://chromium.googlesource.com/chromium/src/+/lkgr/tools/...
There's a pretty interesting compiler wrapper called "fastbuild" that really lives up to its name.
C/C++ build environments are fascinating to me because there are so many. They solve this swarm of overlapping problems in many different ways.