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Date:      Sat, 30 May 2009 16:29:53 +0200
From:      Gabor Kovesdan <gabor@FreeBSD.org>
To:        Ed Schouten <ed@80386.nl>
Cc:        ports@FreeBSD.org, gerald@FreeBSD.org
Subject:   Re: [Patch] Proposal: USE_GNU89 switch
Message-ID:  <4A2142E1.7000607@FreeBSD.org>
In-Reply-To: <20090530142152.GS48776@hoeg.nl>
References:  <20090529123633.GM48776@hoeg.nl> <20090530140800.GR48776@hoeg.nl> <4A213F84.1000704@FreeBSD.org> <20090530142152.GS48776@hoeg.nl>

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Ed Schouten escribió:
> * Gabor Kovesdan <gabor@FreeBSD.org> wrote:
>   
>> I don't think it's a good idea. This knob is completely superfluous and  
>> thus should be avoided. One can just add -std to CFLAGS from a port  
>> Makefile. Forced build are also possible without this stuff, you can set  
>> this in /etc/make.conf.
>>     
>
> So how can we be sure all C compilers implement this switch? In
> bsd.port.mk I see some traces of ICC support. Using this approach it
> would also be possible to remap certain C standards to different
> compilers.
>   
If ICC were supported I would agree with you that a general solution 
would be the best, but unfortunately ICC isn't actually supported. It's 
not a trivial task to work on ICC support because you need a license to 
do so because it is considered a derived work. I wanted to work on ICC 
support before but this was the barrier that stopped me. Probably 
netchild@ can tell you more, he has a license and he used to work on ICC 
support. As for LLVM, probably it won't work out for the whole ports 
tree. I don't know what's the portmgr opinion on this, if we start to 
use LLVM in Ports Collection, we should reconsider the knob, though.
> Really, I really don't care how it's done, whether it's a flag or added
> to the compiler flags directly. I'm just saying adding it to CFLAGS
> directly sounds like a very bad idea. Adding it to /etc/make.conf sounds
> even worse, because it probably only confuses (autoconf) scripts that
> try to figure out a way to make the compiler speak C99.
>   
I didn't say one should add it permanently to make.conf, it was just an 
example how a forced C99 build can be done without introducing new knobs.

Cheers,

-- 
Gabor Kovesdan
FreeBSD Volunteer

EMAIL: gabor@FreeBSD.org .:|:. gabor@kovesdan.org
WEB:   http://people.FreeBSD.org/~gabor .:|:. http://kovesdan.org




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