This is the link that Matt Godbolt posted on reddit a year ago or so: a multifile project compliled by his Compiler Explorer.
Clearly, as soon as I change the compiler to MSVC, the building fails; not just because of the options (e.g. -std=c++17 should be /std:c++17), but mainly because of the makefile.
How do I need to alter the project to make it compile with MSVC?