It seems there's some USE flag check missing: while activating "smime", we have to activage "pgp" module as well: […] checking whether to build pgpcore plugin... no checking whether to build pgpmime plugin... no checking whether to build pgpinline plugin... no checking whether to build rssyl plugin... no checking whether to build spamassassin plugin... no checking whether to build smime plugin... no configure: error: "Plugin smime cannot be built; missing pgpcore plugin " Reproducible: Always Steps to Reproduce: 1. activate smime USE 2. try to compile claws-mail-3.9.1 3. wait… Actual Results: unable to compile Expected Results: should complain about the pgp USE missing and propose to activate it (with --autounmask-write if I'm not mistaken).
Thank you for spotting. This has been fixed through extension of REQUIRED_USE