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To: cygwin AT cygwin DOT com
From: Marco Alanen <marco DOT alanen AT sbg DOT se>
Subject: Re: libpng issues
Date: Fri, 12 Nov 2004 14:55:36 +0100
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Message-ID: <cn2fco$9va$1@sea.gmane.org>
References: <cn264o$f0d$1 AT sea DOT gmane DOT org> <4194B95F DOT 4080209 AT familiehaase DOT de>
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Gerrit P. Haase wrote:
> Marco Alanen wrote:
> 
>> After successfully porting our application from Linux to cygwin, most 
>> of the functions work, except for one thing - png images. As soon as I 
>> call  png_create_read_struct, the application will imediately hang and 
>> start using up all available CPU power. This happens with both 
>> libpng10 and libpng12.
>>
>> This is the call we make:
>> png_structp png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, 
>> (png_voidp)0, 0, 0);
>>
>> Anybody who knows anything about it, or knows what more information I 
>> should provide?
> 
> 
> Simple testcase (compilable snippet), please?
> 
> Gerrit

Some simple code:
#include <stdio.h>
#include <png.h>

int main(int argc, char **argv)
{
         png_structp png_ptr = png_create_read_struct    			 
(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);

         return 0;
}

Compiled with:
gcc -o pngtest pngtest.c -mno-cygwin -mwin32 -mwindows -lpng

  Thanks /Marco


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