On Sat, Jan 28, 2023 at 9:04 AM David Brown <david.brown@xxxxxxxxxxxx> wrote: > Another possibility is to run the compilation using a Cygwin > environment, rather than more common mingw gcc builds. Under Cygwin, > filenames are case sensitive. I vaguely recall that years ago, Windows had an option to make an entire volume case sensitive as part of its posix compatibility efforts. Googling only reveals results related to a newer w10 option to turn it on at a per-directory level. Either of those options might be useful here for the user.