Yes, it's generated by the `configure` script in
Autotools, just like Meson.
Ah... in my case I'm building with (my own) Visual C++ build
projects. At one time, some libraries could generate VC project
files either using Meson or CMake but I never really found them
satisfactory. Could you maybe attach a copy of config.h so I can at
least see what kinda stuff it needs to contain? Thanks,