Bug#353693: Looking for a autotools/libtool expert:Unnecessarily linked libraries
Frank Küster wrote:
> Ralf Stubner <ralf.stubner@physik.uni-erlangen.de> wrote:
>
>> Frank Küster wrote:
>> [...]
>>> At least libcairo is wrong; I think that also libfontconfig, libjpeg,
>>> libfreetype, and maybe libX11 and libXrender are wrong, because
>>
>> I wouldn't be surprised if libjpeg is actually needed, since pdftex is
>> able to include JPEG files directly into the PDF.
>
> Yes, I thought so, too. But as i said, there's no libjpeg in the
> tar.gz, and I couldn't find any reference to jpeg headers in the pdftex
> sources. I only had a quick look, though.
In addition, as Norbert showed, the binaries in texlive aren't linked
against libjpeg. I meanwhile think that libjpeg is indeed unneeded, too.
IIRC JPEG is directly supported by PDF, so pdftex only has to read the
size of the image from the JPEG header and dump the entire image into
the PDF. PNG, on the other hand, has to be transformed in order to be
included in the PDF, which is done with the help of libpng.
cheerio
ralf
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