Make.conf flags

Message

dake · Post by **dake** » Sat Aug 04, 2012 9:10 am

Hi,

Just built my first PC and want to know what your settings are for a intel Ivy Bridge chip, or users with this processor could you post your make.conf file.
I have Intel 3rd generation i5 3570K processor and 32 GIg memory so i need to know and make sure the right changes are made to the make file.

And would like to set this beast up for running Gentoo.

Thanks,

ultraincognito · Post by **ultraincognito** » Mon Aug 06, 2012 3:17 pm

You may to do it simply with "native" architecture. On example, watch on my make.conf:

Code: Select all

CFLAGS="-O2 -march=native -pipe"
CXXFLAGS="-O2 -march=native -pipe"
CHOST="i686-pc-linux-gnu"
MAKEOPTS="-j2"

I have the Sempron 2600+ with one core. You can set "-j3" for the makeopts I think.

Veldrin · Post by **Veldrin** » Mon Aug 06, 2012 3:37 pm

ultraincognito: running a 32-bit system on that kind of hardware would be a waste.

dake: use the following:

Code: Select all

CFLAGS="-march=native -O2 -pipe"
CXXFLAGS="${CFLAGS}"
CHOST="x86_64-pc-linux-gnu"
MAKEOPTS="-j5"

and use amd64 for livecd and stage3

gorkypl · Post by **gorkypl** » Mon Aug 06, 2012 5:15 pm

I think that proper kernel configuration would also be important. Keep your eyes open

Also mount /tmp and /var/tmp as tmpfs, it will speed up your system (especially the latter one, it will result in faster building of packages).

ultraincognito · Post by **ultraincognito** » Mon Aug 06, 2012 5:23 pm

Veldrin wrote:ultraincognito: running a 32-bit system on that kind of hardware would be a waste.

Yes, you are right but it's a bit other question. If Mr. Dake has downloaded the stage 3 then now he hasn't a choice.

But if seriously, did OP read the handbook?

dake · Post by **dake** » Tue Aug 07, 2012 5:08 pm

Thanks for the info guys,

I will try this weekend at installing, and hopefully i should have a working system.

Cheers

dake

cach0rr0 · Post by **cach0rr0** » Wed Aug 08, 2012 8:10 am

ultraincognito wrote:
Veldrin wrote:ultraincognito: running a 32-bit system on that kind of hardware would be a waste.
Yes, you are right but it's a bit other question. If Mr. Dake has downloaded the stage 3 then now he hasn't a choice.

But if seriously, did OP read the handbook?

there are 64bit (amd64) stage3 tarballs

(for the casual reader - 'amd64' == 'x86_64' - so yes, amd64 is correct for your 64bit Intel CPU, unless you're using an Itanium chip)

dake -

before you go merging a load of stuff, it might be worth pointing out that gcc 4.5.3 - the latest "stable", does not appear to have specific optimizations for sandy bridge (namely, a march of corei7-avx). For that, you would need to go to 4.6, which is ~arch masked.

as to how stable 4.6 is? I haven't a clue, I've been away from the forums for a bit and havent seen what sort of buzz there is in gentooland. But I *have* seen posts on the subject before, cant recall where (sorry). As to what you miss out on by being stuck with corei7 instead of corei7-avx? Don't know there either, presumably minimal effect. But if it's worth it to you to have something with supposedly specific optimizations for your CPU, you'd want a newer GCC, and as such, once your base system is happy, one of the first things you'd want to do is upgrade GCC, glibc, binutils

gorkypl · Post by **gorkypl** » Wed Aug 08, 2012 8:22 am

4.6 is OK, I am running 4.7 for some time and had only two or three problems with compiling.