On Mon, May 31, 2021 at 05:42:28PM -0400, Sasha Levin wrote: > > Hi, > > > > Apparently %pe is only supported up to (including) 5.5. It is not part > > of 5.4.123. > > It seems like it would be easier to just back port the %pe commit to v5.4? It seems to apply and build basically fine? I didn't try test it. It's commit 57f5677e535b ("printf: add support for printing symbolic error names"). Rasmus, we were always wondering when you were going to make it work for integer error codes. ;) regards, dan carpenter