getting FNM_PATHNAME behaviour from pattern matching

[Sitaram Chamarty]

Hello,

I'm trying to match a patterm that requires the behaviour of
FNM_PATHNAME (from fnmatch(3)).  Unlike, say, FNM_PERIOD,
which is emulated by unsetting 'dotglob', there does not
seem to be an equivalent to emulate FNM_PATHNAME.

I'd like
    [[ abc/dd/def.html == abc/*.html ]]; echo $?

to return 1, not 0.

What am I missing/doing wrong?