On Sun, 2017-06-25 at 19:12 +0200, Enrico Weigelt, metux IT consult wrote: > Adding a new format conversion for *printf() and friends.
Every use of %M is going to cause gcc when using __printf to emit a warning like: unknown conversion type character ‘M’ in format [-Wformat=] Beyond that, why is this useful? There can't possibly be any fast-path use. Why not just create a function that does errno/string conversions?

