Which CFLAGS to you use to install gentoo-x86 on Athlon64 ?

[_kal_]

By looking here: http://gcc.gnu.org/onlinedocs/gcc-3.3/gcc/Optimize-Options.html
It saw that we shouldn't turn on -fomit-frame-pointer when we use -O2 optimisation because it's even included.

So, correct cflags are :

[nxsty]

[_kal_]

[carpman]

any suggestions for x86 on amd64 using gcc4.1 glib 2.4?

Just in process of building new system using jackass stage3 which is built using:

[Monkeh]

Same as for 64-bit. -march=k8 -O2 -pipe.

[_kal_]

I'm still wondering what processor should I set in Kernel Configuration :

Athlon64 or Athlon/Duron/K7 ?

[GhePeU]

[RushPL]

[jathlon]

I haven't tried this, but I'm sure it wouldn't take that long to find out. If you have a 32bit version of Linux installed, will a 32bit version of gcc build a 64bit kernel? If it compiles, does it run? If it runs, is it stable? Make sure you have a stable kernel handy if you need it. A couple of minutes with the docs for grub or lilo will tell you how to install a couple of kernels side by side.

If you do decide to build the 64bit kernel make sure that under;

Executable file formats / Emulations you select;

IA32 Emulation.

Without the IA32 Emulation, I suspect that a 64bit kernel won't run any 32bit code. The first bit of 32bit code that would try to run is 'init'. Right after the kernel finishes booting. No init, no useable system.

I use lilo, but it seems to me that grub isn't any harder to add a second kernel to. This is what my lilo.conf looks like.

[Monkeh]

[GhePeU]

[RushPL]