@cblake Well, I tried a bit more with your cligen powered memory map code,... **Work Laptop with Windows 10 (Nim 1.4.4)** : initially compiler complained about a missing c header... but I was running an old version of cligen so I uninstalled it and installed again 1.6.1 with nimble. The missing header issue had gone, but I got a new compiler error. Then I decided to test cligen on **Home Laptop with Windows 10** (I'm more keen to experiment on this)... here first I updated Nim to last stable (1.6.12) and then here I installed last cligen version, 1.6.1. However I get the same compiler error I get on Work Laptop. Here it is: $ nim c -d:release --mm:orc cligen_test.nim Hint: used config file 'C:\Users\Andrea\.choosenim\toolchains\nim-1.6.12\config\nim.cfg' [Conf] Hint: used config file 'C:\Users\Andrea\.choosenim\toolchains\nim-1.6.12\config\config.nims' [Conf] .......................................................................................................... C:\Users\Andrea\.nimble\pkgs\cligen-1.6.1\cligen\mfile.nim(131, 17) Error: type mismatch: got <Handle, cint, cint, int, int, bool, bool> but expected one of: proc mopen(fd, fh: cint; fi: FileInfo; prot = PROT_READ; flags = MAP_SHARED; a = 0.Off; b = Off(-1); allowRemap = false; noShrink = false; err = stderr): MFile first type mismatch at position: 1 required type for fd: cint but expression 'fh' is of type: Handle proc mopen(fh: cint; prot = PROT_READ; flags = MAP_SHARED; a = 0; b = Off(-1); allowRemap = false; noShrink = false; err = stderr): MFile first type mismatch at position: 1 required type for fh: cint but expression 'fh' is of type: Handle proc mopen(path: string; prot = PROT_READ; flags = MAP_SHARED; a = 0; b = -1; allowRemap = false; noShrink = false; perMask = 0o000000000666; err = stderr): MFile first type mismatch at position: 1 required type for path: string but expression 'fh' is of type: Handle expression: mopen(fh, prot, flags, a, b, allowRemap, noShrink) Run
I wonder if it is Windows specific, or maybe I have a not-so-clean installation, so it's specific to my configuration (likely so) .