All I wanted to do was compile the new kernel 4 and have it running on my machine. Rather than taking the stock kernel from kernel.org, I figured the Fedora build would have patches and the correct kernel options enabled. Also having an RPM would mean easy update.
I built the 4.0 kernel using GCC: 4.9.2-6 and the kernel is: 3.19.3-200.fc21.x86_64
>> Aside from that, I can't think of any major reason to rebuild unless
you're modifying the code (or you think there's a compiler bug).
No bugs/not modifying any code. Just curious to see if the new kernel would run on my machine.
James
On Friday, 17 April 2015, 12:47, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote:
On Fri, Apr 17, 2015 at 08:44:20AM +0200, Thorsten Leemhuis wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> On 16.04.2015 14:12, Josh Boyer wrote:
> > On Thu, Apr 16, 2015 at 6:17 AM, James Harrison
> > <jamesaharrisonuk@xxxxxxxxxxx> wrote:
> >> I took the src RPM from rawhide and compiled it in F21 x86_64..
> > For what purpose?
>
> I do something like that to help testing a new kernel version before
> it hits updates-testing.
You could pull it out of koji too though.
> > Also, generally you don't have to rebuild the kernel just because
> > it is an older Fedora release. I test rawhide/F22 kernel RPMs on
> > top of F21 userspace daily.
>
> It might be a issue for those few that want to or have to compile
> modules for that kernel -- or is it possible these days to use gcc 4.9
> to compile modules for a kernel that was compiled with gcc 5.0?
Right, that's why I asked James why he rebuilt things. Out of tree
modules would require a rebuild against whatever kernel version you have
locally. As far as I know, you still have to have matching compiler
versions between your kernel and modules.
Aside from that, I can't think of any major reason to rebuild unless
you're modifying the code (or you think there's a compiler bug).
josh
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