Re: [gentoo-dev] Re: Moving CPU flags into USE_EXPAND

Il 15/01/2015 11:30, Alexis Ballier ha scritto:
> On Thu, 15 Jan 2015 10:20:15 +0000 (UTC)
> Martin Vaeth <martin@×××××.de> wrote:
>
>> Christopher Head <chead@×××××.ca> wrote:
>>> All that requires is knowing the names, though; it would be
>>> fine if no package actually uses the feature yet.
>> ++
>>
>> More precisely: When changing the names anyway,
>> IMHO it would be a very good idea to follow the convention of the
>> "flag" names in /proc/cpuinfo and add all flags supported
>> there as possible USE-flags, no matter, whether they are currently
>> used in some package or not.
>
> seriously ?
>
> $ grep flags /proc/cpuinfo | head -n 1 | wc -w
> 94
>

Actually I like the idea, there are performances problems  related to
ebuilds or portage?

CPU_FLAGS=$(grep -m1 flags /proc/cpuinfo)
CPU_FLAGS=${CPU_FLAGS#*:}
echo $CPU_FLAGS | wc -w
92