On Mon, Nov 23, 2009 at 6:33 PM, walt <w41...@gmail.com> wrote:
> On 11/23/2009 08:02 AM, Alexander wrote:
>
>> Hi,
>>
>> I'm trying to upgrade app-text/poppler-utils (as part of a bigger
>> system upgrade), but it fails...
>>
>
> libtool: link: x86_64-pc-linux-gnu-g++ -Wall -Wno-write-strings -O2
>> -march=nocona -pipe -Wl,-O1 -o pdfinfo pdfinfo.o printencodings.o
>> parseargs.o -lpoppler /usr/lib64/libfontconfig.so
>> /usr/lib64/libfreetype.so /usr/lib64/libexpat.so -lopenjpeg -lz
>> ImageOutputDev.o: In function `ImageOutputDev::drawImage(GfxState*,
>> Object*, Stream*, int, int, GfxImageColorMap*, int*, int)':
>> ImageOutputDev.cc:(.text+0x2f4): undefined reference to
>> `ImageStream::close()'
>>
>
> Just finding the real error in all that junk is the first challenge
> in debugging :o) I just noticed that the word 'error' doesn't even
> appear in the libtool 'error' message. Hrmphh! Yet another black
> mark on libtool's report card.
>
> Notice the double colons in "ImageStream::close()". That's a dead
> giveaway that this is c++ code. Remember that, because you will see
> this kind of c++ problem fairly often.
>
> The usual suspect is that you are now using a different (newer?) gcc
> to build poppler-utils than you were using when you compiled the
> c++ library that's causing this problem. (Usually, but not always.)
>
> So, which c++ library is causing the problem?
>
> A quick and dirty check:
> $grep -r ImageStream /usr/include/*
> /usr/include/ImageMagick/magick/image.h: DisassociateImageStream(Image *),
> /usr/include/ImageMagick/magick/methods.h:#define DisassociateImageStream
> PrependMagickMethod(DisassociateImageStream)
> /usr/include/poppler/Gfx.h: Stream *buildImageStream();
> /usr/include/poppler/Stream.h:// ImageStream
> /usr/include/poppler/Stream.h:class ImageStream { <-------- Eureka!
>
>
> $equery b Stream.h
> [ Searching for file(s) Stream.h in *... ]
> dev-libs/poppler-0.10.7 (/usr/include/poppler/Stream.h)
>
> So, the guilty party is poppler? Looks like it.
>
> The cheap and dirty remedy is to re-emerge poppler, but just for my
> own education (and yours, I hope) I'm slogging ahead:
>
> I reinstalled dev-libs/poppler, and now installing app-text/poppler-utils
works.
> The ImageStream 'class' should define a 'method' named close(). (This
> is the usual and customary object-oriented paradigm.) Take a look at
> Stream.h, and look for these lines:
>
> // Close the stream previously reset
> void close();
>
> Do you see them? If not, re-emerge poppler and look again. I'd like
> to know if I'm on the right track.
>
> I checked this, and I could not find this line. Then I reinstalled it, and
now it's there.
Thanks for the very informative reply! -- next time I'll know to try this
approach too.
Best,
Alexander
