For example sys-devel/gcc installs man pages in a weird location /usr/share/gcc-data/x86_64-pc-linux-gnu/13/man, which is added to MANPATH (and therefore e.g. "man 1 gcc" works) but is not considered when building mandb (therefore "apropos gcc" or "man -k gcc" fail to find gcc(1)). This happens because 1. the path is not considered by mandb possibly because it is run by a /etc/cron.daily/mandb cron job in the environment without correct MANPATH (i'm not sure, idk how to verify this) 2. MANDB_MAP for this path is missing in man_db.conf Reproducible: Always Steps to Reproduce: apropos -e gcc Actual Results: gcc: nothing appropriate. Expected Results: gcc (1) - GNU project C and C++ compiler A workaround: Add to man_db.conf: MANDATORY_MANPATH /usr/share/gcc-data/x86_64-pc-linux-gnu/13/man MANDB_MAP /usr/share/gcc-data/x86_64-pc-linux-gnu/13/man /var/cache/man Rebuild everything: sudo -E mandb --create
