[RFC] cmake,bsd: Fix mandir to saner defaults. #7417
Merged
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The old behaviour was to set CMAKE_INSTALL_MANDIR to /usr/local/man
when MANPREFIX wasn't defined. This caused mismatching installation
paths when the installation prefix wasn't /usr/local.
This fix explicitely checks that the prefix is /usr/local to change
the value of CMAKE_INSTALL_MANDIR, and uses the default behaviour
otherwise, as /usr/local is the exception rather than the norm
(as per man hier(7)).
Tested prefixes are:
/usr
/usr/share/man
/usr/local
/usr/local/man
$HOME/.local
$HOME/.local/share/man
These paths should be correct according to hier(7), and compatible with the XDG defaults.
This fixes #7239.