libpng issues

[Gerrit P. Haase]

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
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