Re: building from src, linking libpng

On Wed, Jun 29, 2011 at 05:17:49PM -0500, Bob Friesenhahn wrote:
> On Wed, 29 Jun 2011, [email protected] wrote:
>
>>
>> I'm trying to build GraphicsMagick from src w/o X11 support, but with png support. The ./configure process tests for libpng library and headers (finds successfully), then does a link test trying to call png_get_io_ptr().
>>
>> I've run nm(1) on libpng.so, and it says there -is- a png_get_io_ptr(), but the test is still failing:
>
> What type of system are you using?

NetBSD martin 5.1 NetBSD 5.1 (GENERIC) #0: Mon Jun  6 06:26:11 PDT 2011
root@:/usr/obj/sys/arch/amd64/compile/GENERIC amd64

> What version of libpng is being used?

png-1.5.2

> What version of GraphicsMagick are you building?

1.3.12

> Please note that libpng 1.5 has a modified API.  Only the  
> development/snapshot version of GraphicsMagick builds with libpng 1.5.
>
> Sometimes it helps to inspect the config.log file to see what error  
> message was produced by the compiler when the configure test failed.  
> Often the error message can be quite helpful to understand the failure.

Thanks -- I'm typically not an auto* debugger -- looking, and I have
a clue -- lib is installed as libpng15.so, so linking with -lpng
fails. Tested, confirmed.

Can I pass alternate name for this lib to ./configure?

> Bob
> -- 
> Bob Friesenhahn
> [email protected], http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

-- 
Brad Harder
Method Logic Digital Consulting
http://methodlogic.net/
http://twitter.com/bcharder


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