Re: [gentoo-user] Missing CPU options in make menuconfig

[Fernando Rodriguez <cyklonite@gmail.com>]

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On 07/20/2016 07:38 PM, Fernando Rodriguez wrote:
> On 07/20/2016 02:54 PM, Neil Bothwick wrote:
>> On Wed, 20 Jul 2016 14:33:04 -0400, Fernando Rodriguez wrote:
> 
>>> I don't use gentoo sources but I remember reading about gentoo patches
>>> for processor specific optimizations and being tempted to try them. Is
>>> it possible that is what you're refering to?
>>>
>>> The vanilla sources only shows 5 choices for me on amd64:
>>> (X) Opteron/Athlon64/Hammer/K8
>>> ( ) Intel P4 / older Netburst based Xeon
>>> ( ) Core 2/newer Xeon
>>> ( ) Intel Atom
>>> ( ) Generic-x86-64
>>>
>>> And it shows a different set of options when I run it on an x86 machine.
> 
>> That's what I get here, but help lists all the ones I get in
>> gentoo-sources, apart from MNATIVE, which indicates to me that those
>> options should be available, once I work out how to switch them on.
> 
> Disable CONFIG_64BIT and you'll get them all.

And for future references, here's how I found out:

1. On the sources where you have the options highlight one of them and
   press ? (help). You'll see X86_32 under "Depends on:".

2. Hit ESC twice and then twice again to return to a menu with
   search functionality. Then type /X86_32 and hit enter. You'lll see that
   the option depends on !64BIT, so you need to disable CONFIG_64BIT for
   X86_32 to be available.

3. After disabling CONFIG_64BIT on the kernel where the options where missing
   I searched X86_32 again and this time it has [=y] next to it so it came
   on automatically and the options showed up but for some options you need to
   enable manually after enabling the dependencies.

- -- 

Fernando Rodriguez
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