Re: Compiling octave specifying path to GraphicsMagick library

[Carnë Draug]

On 2 April 2012 12:18, Mike Miller <address@hidden> wrote:
> On Mon, Apr 02, 2012 at 09:57:16AM +0100, Carnė Draug wrote:
>> On 1 April 2012 14:15, Mike Miller <address@hidden> wrote:
>> > On Sun, Apr 01, 2012 at 11:34:15AM +0100, Carnė Draug wrote:
>> >> On 23 March 2012 13:26, John W. Eaton <address@hidden> wrote:
>> >> > On 23-Mar-2012, Carnė Draug wrote:
>> >> > | I can't find the option to specify the path for the GraphicsMagick
>> >> > | library when compiling octave. I've looked at ./configure --help but
>> >> > | there is only the --with-magick option which only lets me choose
>> >> > | between GraphicsMagick and ImageMagick but not define the directory
>> >> > | for the library. I have tried (guessing) --with-magick-libdir and
>> >> > | --with-magick-includedir but no success.
>> >> >
>> >> > Use CPPFLAGS=-I/some/dir to add the directory where the header files
>> >> > are found and LDFLAGS=-L/some/dir to add the directory where the
>> >> > library is found.
>> >>
>> >> I tried this but it's still not working. I thought it was a problem
>> >> with GraphicsMagick but after talking to their devs it looks like the
>> >> problem is still with building Octave.
>> >>
>> >> Even by setting those flags, after compiling Octave (3.6.1 by the way)
>> >> checking octave_config_info I noticed that it was still using the
>> >> system /usr/include/GraphicsMagick. This was despite that configure
>> >> was using the "right" GraphicsMagick for the tests. However, looking
>> >> into the Makefile being generated I noticed this MAGICK_CPPFLAGS =
>> >> -I/usr/include/GraphicsMagick. I manually edited the Makefile
>> >> MAGICK_CPPFLAGS and MAGICK_LDFLAGS and that seemed to work. However,
>> >> the octave_config_info is still mentioning MAGICK_CPPFLAGS =
>> >> -I/usr/include/GraphicsMagick, not the ones I changed.
>> >>
>> >> I no longer get the warning about being limited to 8bit images (so
>> >> it's using the right GraphicsMagick) but I get the following error
>> >>
>> >> error: imread: invalid image file: Magick++ exception: Magick: No
>> >> decode delegate for this image format () reported by
>> >> magick/constitute.c:8279 (ReadImage)
>> >>
>> >> But GraphicsMagick does open the images no problem (I've tried it
>> >> outside octave with "gm display").
>> >>
>> >> Does anyone has any idea of what I'm doing wrong?
>> >
>> > Yes, I still think PKG_CONFIG_PATH is the right way to go, have you
>> > tried it yet?
>>
>> I did but I had problems with it. When running configure, one of the
>> tests fail (the one about "checking for Magick::ColorRGB in
>> Magick++.h"). When I talked with the GraphicsMagick devs, they told
>> me:
>>
>> > It looks like the GraphicsMagick libraries have been included, but all of
>> > the libraries that the GraphicsMagick libraries depend on are not included.
>> >
>> > Do you have any idea how Octave picks up the configuration required by
>> > GraphicsMagick?
>> >
>> > For example, it might try to execute 'GraphicsMagick++-config' (which would
>> > be /home/carandraug/.bin/gm/bin/GraphicsMagick++-config in your install) to
>> > obtain its configuration.  Perhaps it expects that this script will be in
>> > your executable search path.
>>
>> I have tried to change $PATH to include it and all "which
>> GraphicsMagick++-config", "pkg-config --cflags GraphicsMagick++" and
>> "pkg-config --libs GraphicsMagick++" show the right paths
>>
>> $ which GraphicsMagick++-config
>> /home/carandraug/.bin/gm/bin/GraphicsMagick++-config
>> $ pkg-config --cflags GraphicsMagick++
>> -I/home/carandraug/.bin/gm/include/GraphicsMagick
>> $ pkg-config --libs GraphicsMagick++
>> -L/home/carandraug/.bin/gm/lib -lGraphicsMagick++ -lGraphicsMagick
>>
>> However, configure still fails. I have pastebin the errors I get on
>> config.log here http://pastebin.com/TVZWA0ew .
>
> I can tell from your config.log that configure is only finding the
> static library libGraphicsMagick.a, when you built it did you disable
> shared libraries?  That would be why it can't find it's dependencies.

Oh! I didn't disable them, they are disabled by default and on their
INSTALL file they advise to not enable it unless I know what I'm doing
(which I don't, octave was the only program I have ever built before).
So I enabled shared libraries, added the bash code to .profile already
mentioned to set all the variables, and configure ran fine fine this
time. I have then built octave successfully and imread is working
perfectly, reading uint16 images. Problem solved!

Thank you all very much for your help,
Carnë