Kernel Compilation advice needed

[Zer0]

Hello,

I'm considering upgrading from Mandrake 10.0 to a custom-compiled Gentoo box. I need some advice as to what parameters and flags i should pass into the g++ (or maybe even icc ) command, given my system specs. Here they are:

Intel P4 530 3.0GHz (1MB L2 cache, 800FSB, HyperThreading, etc.)
Integrated GMA 900 (915G chipset) graphics
512MB DDR-400 RAM
80GB SATA hard drive
Asus P5GDC-V mobo (PCIe)
Integrated network hardware

What adds to my confusion is that Knoppix 3.4 shows my processor as an i586, whereas mandrake 10.0 shows it as a i686. Moreover, both distros show two identical processors, even though i don't have a dual processor setup (I think this is due to HyperThreading though). Whats the optimum g++ command for my system? Thanks.

P.S: I want it fully optimised for speed. Memory is definitely not an issue here.

[sarumont]

Here is the page that you'll want to check out:

Using the GCC compiler

You'll definately want these in your CFLAGS:

-O3 -pipe -mcpu=pentium4 -msse -msse2 -mmmx -fomit-frame-pointers

Beyond that, check out all the optomization options on the site to which I linked you. Also check out section 5.e. of the Gentoo Installation guide (x86).

[Zer0]

thank you very much for the incredibly helpful link, sarumont!!!