When I got the message "CC.exe: error: CreateProcess: No such file or directory" it turns out that I had installed gcc in mingw but not g++. You need to make sure there's a step like "mingw-get install g++". Also, when I got a DOSBOX that would hang when trying to call "mount", it turned out that …

I tried to do this and the resulting executable kept on failing. Eventually I figured out what was going on. Not only do you need to copy the DOSBOX.EXE executable, but you need to make sure the Dosbox directory has the correct gcc DLL files. Specifically, I needed to copy libgcc_s_dw2-1.dll and …