Re: [gentoo-hardened] AMD64 + hardened

[lunaslide]

Ed W wrote:
> lunaslide wrote:
>> You should be able to just install a generic gentoo if necessary, then
>> change the profile over, change make.conf CFLAGS and 'emerge -e world'
>> (possibly twice to get all the software rebuilt with the hardened
>> toolchain) and have it running 64bit hardened.  Putting
>> '-march=athlon64 -msse3' in your CFLAGS should get you what you want.
>> Do not use -O3, it's unstable and generally not worth it anyway.
>
> Is this really true?  There are some notes in the 64 bit install doc
> saying that it's *not* this easy and that some stuff needs to be
> changed, especially to support a mixed 32/64 bit environment?  Something
> about multi-lib?
>
> Ed W

You're referring to running 32bit programs on a 64bit OS.  That does 
require the multilib stuff.  But rebuilding the whole system from 
scratch with emerge -e world will build everything 64 bit.  And if I 
recall correctly, when I was doing this with my box, it built two 
versions of glibc and portage even warned me it was doing so.  So it 
might be building multilib just as a result of rebuilding the system 64bit.

I'm just delving into this lately though, so someone please correct me 
if I misunderstood it.

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