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Date: Mon, 25 May 2015 10:37:25 +0200
From: Tijl Coosemans <tijl@FreeBSD.org>
To: Jan Beich <jbeich@FreeBSD.org>
Cc: ports-committers@freebsd.org, svn-ports-all@freebsd.org,
 svn-ports-head@freebsd.org
Subject: Re: svn commit: r387283 - head/devel/sdl20
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On Sun, 24 May 2015 20:01:47 +0200 Jan Beich <jbeich@FreeBSD.org> wrote:
> Tijl Coosemans <tijl@FreeBSD.org> writes:
>> +.if defined(MACHINE_CPU) && ${MACHINE_CPU:Mmmx}
>> +CONFIGURE_ARGS+=	--enable-mmx
>> +.else
>> +CONFIGURE_ARGS+=	--disable-mmx
>> +.endif
> 
> Why not use smth like the following instead ?
> 
>   OPTIONS_DEFAULT_i386=	${MACHINE_CPU:tu:MMMX}

Because an option doesn't make much sense for CPU features.  Either
the target CPU supports MMX or it doesn't.  It's not a user choice.