From owner-freebsd-ports@FreeBSD.ORG  Tue Feb 13 01:47:59 2007
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From: Chuck Swiger <cswiger@mac.com>
Date: Mon, 12 Feb 2007 17:01:45 -0800
To: Andrew Pantyukhin <infofarmer@FreeBSD.org>
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Cc: youshi10@u.washington.edu, freebsd-ports@freebsd.org,
	Tom McLaughlin <tmclaugh@freebsd.org>
Subject: Re: Porting a Linux application to FreeBSD
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On Feb 12, 2007, at 4:39 PM, Andrew Pantyukhin wrote:
>> Linux does not have it's own libpng and neither do we.  Most Linux
>> distros and us use libpng from libpng.org.  I took a quick look at  
>> the
>> current libpng in the ports tree and it appears to have  
>> png_read_png().
>> With out seeing a Makefile for the ports system and some error  
>> output it
>> is hard to comment as to the specific reason stuff is failing for  
>> you.
>
> Yes, but my money says
> ==
> =CPPFLAGS=       -I${LOCALBASE}/include
> =LDFLAGS=        -L${LOCALBASE}/lib
> =GNU_CONFIGURE=  yes
> =CONFIGURE_ENV=  CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
> ===
> will help, it always(x0.999) does :-) It's one
> of those things everyone knows about but no one
> commits into Mk/* because we enjoy routine so
> much.

I believe your suggestion is exactly right as to the problem; my only  
question would be whether it would be better to change the ports Mk  
infrastructure, or to change the system compiler to add /usr/local/ 
{include,lib} to the default search paths...

-- 
-Chuck