Re: Search content (.h files) of all (-dev) packages?
> upstream .. issue
Paolo, thanks for watching. Doxygen works as expected.
In the past, it accepted group commands without being in a "special comment section". Since version 1.8.16, Doxygen requires a "special 
comment section". Again, as designed, Doxygen does not see those group 
commands now. Consequently, Doxygen does not emit any warning. And the 
resulting documentation might† be broken. Actually, I noticed this 
initially with libopusfile which had empty documentation in chapter 4 
because of that [1].
Consequently, Doxygen has no issue. However, looking at the amount of 
projects affected, a feature request for Doxygen could be to emit a 
warning if such an "old" style group command is found. Not sure.
† That is the problem: It might be obvious. It might be not so obvious 
change in the resulting documentation. Even in libopusfile, where it was 
obvious and reported by two other users over a year span, it took me 
some time to find the cause.
[1] <https://gitlab.xiph.org/xiph/opusfile/-/merge_requests/34>
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