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Date: Sat, 29 Jul 2006 23:12:59 +0200
From: "[LoN]Kamikaze" <LoN_Kamikaze@gmx.de>
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To: Andrey Chernov <ache@freebsd.org>, Jeremy Messenger <mezz7@cox.net>, 
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Subject: Re: graphics/png - CC
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Andrey Chernov wrote:
> On Sat, Jul 29, 2006 at 02:59:19PM -0500, Jeremy Messenger wrote:
>> On Sat, 29 Jul 2006 13:27:08 -0500, [LoN]Kamikaze <LoN_Kamikaze@gmx.de>  
>> wrote:
>>
>>> Andrey Chernov wrote:
>>>> On Sat, Jul 29, 2006 at 01:16:47PM -0500, Jeremy Messenger wrote:
>>>>> On Fri, 28 Jul 2006 18:35:14 -0500, Andrey Chernov <ache@FreeBSD.ORG>
>>>>> wrote:
>>>>>
>>>>>> On Fri, Jul 28, 2006 at 11:40:10AM +0200, [LoN]Kamikaze wrote:
>>>>>>> The port graphics/png does not honour the CC Variable.
>>>>>> I can't reproduce that, it honors CC for me.
>>>>> I can, CC=gcc will not change the CC when it compiles.
>>>> It is hard to imagine how it is ever possible. There is standard BSD
>>>> makefile.freebsd which not owervrites CC as you can see in the file.
>> No idea, I don't know png's build system so that cc must be come from  
>> somewhere.
>>
>>> Is it possible that make.conf is read again?
>> I think, add "CC=${CC}" in graphics/png/Makefile's MAKE_ENV at 31 line  
>> should do.
> 
> It will be hack for reason unknown, I prefer to avoid that.
> I normally set CC to anything and it honors.
> I never heard from somebody other than you about that problem.
> You should inspect your build path step by step to find real reason of 
> that bag, only after that we can find the real fix.
> 

The problem is there, without doubt. Normally bsd.port.mk only forwards CC to the configure script (look for the do-configure target). Since the configure target is omitted the port will not receive CC. This is why it has to be included into the make environment. I.e. with

MAKE_ENV+= CC="${CC}"

This is not a hack, but a necessity, due to the lack of a configure step.