Ask HN: Modern C/C++ tech stack?

Go with a gcc/g++ based toolchain, it has a few warts as most do, but it is flexible, well known, documented online and most every library and system works with it. I use gcc/g++ on everything from micro-controllers to servers using C/C++ and it works and has good support. I personally still like makefiles over CMake, but that is personal and nothing is wrong with CMake and many new solutions pick CMake for their build process. Pick a decent IDE that makes your life easier, I use CLion for all server/desktop and on microcontrollers I use either CLion with makefiles or in some cases Atollic Studio since it is well integrated with STM toolchains.

Last point, in reference to C++ if you are learning/planning to use it, stick with modern C++ wherever possible, much of what people complain about C/C++ is really just their own lack of knowledge or bias to what the language was 30+ years ago.