ImageMagick: Still more insufficient package dependencies?

ImageMagick: Still more insufficient package dependencies?

[Angelo Graziosi]

I am trying to build the development version of Emacs with the 
imagemagick support. In the configure step one gets:

$ ./configure --with-imagemagick
[...]
checking for Wand... yes
checking IMAGEMAGICK_CFLAGS... -fopenmp -I/usr/include/ImageMagick
checking IMAGEMAGICK_LIBS... -lMagickWand -lMagickCore
checking for MagickExportImagePixels... no
[...]
Does Emacs use imagemagick?                             yes
[...]

But,

$ make
[...]
image.o: In function `imagemagick_load_image':
/tmp/emacs/src/image.c:7723: undefined reference to 
`_MagickExportImagePixels'
collect2: ld returned 1 exit status
make[2]: *** [temacs.exe] Error 1
make[2]: Leaving directory `/tmp/emacs/Work/src'
make[1]: *** [src] Error 2
make[1]: Leaving directory `/tmp/emacs/Work'
make: *** [bootstrap] Error 2

So, is this to be expected with current ImageMagick packages of Cygwin? 
or have we another 'more insufficient package dependencies' issue? In 
this case, which are the other packages to be installed?

I have already installed ImageMagick-6.4.0.6-2, 
libImageMagick1-6.4.0.6-2 and libMagick-devel-6.4.0.6-2 and their 
dependencies.

Thanks,
Angelo.

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Re: ImageMagick: Still more insufficient package dependencies?

[Ken Brown]

On 8/19/2010 7:33 AM, Angelo Graziosi wrote:
> I am trying to build the development version of Emacs with the
> imagemagick support. In the configure step one gets:
>
> $ ./configure --with-imagemagick
> [...]
> checking for Wand... yes
> checking IMAGEMAGICK_CFLAGS... -fopenmp -I/usr/include/ImageMagick
> checking IMAGEMAGICK_LIBS... -lMagickWand -lMagickCore
> checking for MagickExportImagePixels... no
> [...]
> Does Emacs use imagemagick?                             yes
> [...]
>
> But,
>
> $ make
> [...]
> image.o: In function `imagemagick_load_image':
> /tmp/emacs/src/image.c:7723: undefined reference to
> `_MagickExportImagePixels'

This looks to me like an Emacs configuration problem, not a Cygwin 
problem.  The code in image.c:7723 is guarded by #ifdef 
HAVE_MAGICKEXPORTIMAGEPIXELS, and configure reported "no" in the 
corresponding test.

Ken

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Re: ImageMagick: Still more insufficient package dependencies?

[Gary]

Angelo Graziosi wrote:
> I am trying to build the development version of Emacs with the
> imagemagick support. In the configure step one gets:
>
> $ ./configure --with-imagemagick
> [...]
> checking for Wand... yes
> checking IMAGEMAGICK_CFLAGS... -fopenmp -I/usr/include/ImageMagick
> checking IMAGEMAGICK_LIBS... -lMagickWand -lMagickCore
> checking for MagickExportImagePixels... no
> [...]
> Does Emacs use imagemagick?                             yes
> [...]
>
> But,
>
> $ make
> [...]
> image.o: In function `imagemagick_load_image':
> /tmp/emacs/src/image.c:7723: undefined reference to
> _MagickExportImagePixels'

I haven't tried building emacs, but I know the console version (at least
on Cygwin, I can't comment on any other build) does seem to have some
odd (unsatisfied) reliance on imagemagick, and reported it as a bug -
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6133

-- 
Gary
Non-kook (allegedly)

1.7.4(0.225/5/3) 2010-04-07 11:02 Cygwin


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Re: ImageMagick: Still more insufficient package dependencies?

[Angelo Graziosi]

Ken Brown wrote:
> This looks to me like an Emacs configuration problem, not a Cygwin problem. The code in image.c:7723 is guarded by #ifdef HAVE_MAGICKEXPORTIMAGEPIXELS, and configure reported "no" in the corresponding test.

If I understand this rightly,

...
checking for MagickExportImagePixels... no
...

is right, i.e. the Cygwin binaries of ImageMagick do not support the 
function 'MagickExportImagePixels', but Emacs 'configure' sets 
'HAVE_MAGICKEXPORTIMAGEPIXELS' to true in any case, so that the build 
enables the imagemagick support,

...
Does Emacs use imagemagick?       yes
...

but it fails, obviously, at link time. This seems to be confirmed by

$ grep -iR MagickExportImagePixe config.status
D["HAVE_MAGICKEXPORTIMAGEPIXELS"]=" 1"

$ grep -iR MagickExportImagePixe src/config.h
/* Define to 1 if you have the `MagickExportImagePixels' function. */
#define HAVE_MAGICKEXPORTIMAGEPIXELS 1

Thanks for clarification.

- Angelo

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