Re: ImageMagick support on Cygwin

[joakim@verona.se]

Ken Brown <kbrown@cornell.edu> writes:

> On 8/20/2010 5:01 AM, Eli Zaretskii wrote:
>>> Date: Fri, 20 Aug 2010 00:49:28 +0200
>>> From: Angelo Graziosi<angelo.graziosi@alice.it>
>>>
>>> Ken Brown wrote:
>>>> I think the culprit is this line in configure.in:
>>>>
>>>>
>>>> AC_DEFINE(HAVE_MAGICKEXPORTIMAGEPIXELS, 1, [Define to 1 if MagickExportImagePixels is defined.])
>>>
>>> Commenting out it and regenerating 'configure' seems to fix the issue.
>>
>> Can you figure out why AC_DEFINE(HAVE_MAGICKEXPORTIMAGEPIXELS) causes
>> trouble in Cygwin?  What version of ImageMagick do you have?
>
> I don't think this is a Cygwin issue.  I think it's a mistake in
> configure.in, but I could be wrong.  (I don't really understand the
> syntax of this file.)  The line I quoted seems to unconditionally
> define HAVE_MAGICKEXPORTIMAGEPIXELS, making the next line irrelevant:
>
>   AC_CHECK_FUNCS_ONCE(MagickExportImagePixels)
>
> What happens on Cygwin is that it doesn't have the
> MagickExportImagePixels function, and AC_CHECK_FUNCS_ONCE correctly
> detects this, but HAVE_MAGICKEXPORTIMAGEPIXELS is defined anyway.
>
> Cygwin's ImageMagick is 6.4.0.6, to answer your last question.

This analysis is probably correct. I'll try to check in a fix.

> Ken
>

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