On Mon, 21 Nov 2022 12:08:53 +0100 "Jakub T. Jankiewicz" <jcubic at onet.pl> wrote: > Yes I have installed perl-devel I have /usr/lib64/perl5/CORE/EXTERN.h but > the Claws-mail can't find it. Can you share your config.log? (Or at least the pertinent part of it.) with regards Paul