Re: libcupsfilters: mupdf not "Required"

Am 06.12.25 um 22:30 schrieb Rainer Fiebig ([email protected] via blfs-dev
Mailing List):
> Am 06.12.25 um 21:40 schrieb Bruce Dubbs ([email protected] via
> blfs-dev Mailing List):
>> On 12/6/25 10:31 AM, Rainer Fiebig ([email protected] via blfs-dev Mailing
>> List) wrote:
>>> Am 06.12.25 um 17:09 schrieb Rainer Fiebig ([email protected] via blfs-dev
>>> Mailing List):
>>>> Mupdf is labeled as "Required" for libcupsfilters.  However,
>>>> libcupsfilters-2.1.1 can be built without mupdf, using the config-option
>>>>
>>>>     --disable-mutool
>>>>
>>>> I just did so and the build was fine, including the tests.
>>>>
>>>> So I suggest do downgrade mupdf to "Recommended" or perhaps even
>>>> "Optional" for libcupsfilters.
>>>
>>> This seems to go even further as there is also
>>>
>>>     --disable-ghostscript
>>>
>>> as a config-option.  So it seems to me that ghostscript can/should also
>>> be downgraded, like mupdf.
>>>
>>> Here's part of the build-log, building without both, ghostscript and
>>> mupdf:
>>> [...]
>>> Build configuration:
>>>          libcups:         2.4.15
>>>          cups-config:     system
>>>          poppler:         yes
>>>          ghostscript:     no
>>>          gs-path:
>>>          mutool:          no
>>>          mutool-path:
>>>          ippfind-path:    system
>>>          imagefilters:    yes
>>>          jpeg:            yes
>>>          exif:            yes
>>>          png:             yes
>>>          tiff:            yes
>>>          dbus:            yes
>>>          werror:          no
>>>          test-font:       /usr/share/fonts/dejavu/DejaVuSans.ttf
>>
>> I like that, but to decide whether to make them recommended or optional,
>> I'm wondering what they do for libcupsfilters.
> Or for cups-filters which also has those two config-options.
> 
>>
>> We do say ghostscript OR mupdf.  I'm guessing they convert to a pdf
>> instead of the default ps format.
>>
>> Perhaps one of them is needed to just output to a pdf file.
> Or perhaps even both.  I had removed mupdf from the system and had
> rebuilt libcupsfilters _and_ cups-filters with ghostscript but without
> mupdf.  I just discovered that now Firefox and Thunderbird hang and have
> to be killed when trying to print a page or email via the system
> print-dialogue.  Printing a pdf from LO-Writer or Kate still works.
Man - this problem caused me serious pain and practically ruined my
weekend (and more)!

Only a few minutes ago and by pure chance, I discovered (by parsing the
latest BLFS-cups-instructions _again_ for a mistake I might have made)
that there is a new version for cups (-2.4.16).  Installing that version
finally! solved the problem.  I was really at my wits end with this.

I'm wondering why there have not been complaints regarding cups-2.4.15
on blfs-support.  Maybe I'm the only one who follows and heeds the
security advisories.

Whatever - from this experience with cups-2.4.15, I suggest that
security advisory

12.4 042 CUPS Date: 2025-12-02 Severity: Medium

be amended for cups-2.4.16 or that a new SA be issued.  Perhaps users
should even be warned against using cups-2.4.15 on blfs-support.


Rainer

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