Knoppix 7.0.3 CD & DVD now on mirrors

[ruymbeke]

Hello,
Thank you very much for your reply.
This is exactly what I did: boot the DVD iso within a virtual machine without any update nor modification.
It worked with some previous Knoppix releases but not 7.0.3. It suppose that Klaus did not compile the
Knoppix kernels from Knoppix, reason for the version mismatch probably created by a different gcc version.
I guess it will help to find out which version of gcc has been used to compile the 703 kernel.
Best Regards,
Gilles

I think the kernel modules are "sensitive" to a few factors, gcc compiler version is one of them. Did you by any chance upgraded the gcc compiler version ? Since you only want to get the oprofile.ko, you might want to try to compile it inside a virtual machine, using the original DVD Live CD. In that case, hopefully you retained all the factors could cause the kernel module loader to fail the sanity check.

[kl522]

Hello,
Thank you very much for your reply.
This is exactly what I did: boot the DVD iso within a virtual machine without any update nor modification.
It worked with some previous Knoppix releases but not 7.0.3. It suppose that Klaus did not compile the
Knoppix kernels from Knoppix, reason for the version mismatch probably created by a different gcc version.
I guess it will help to find out which version of gcc has been used to compile the 703 kernel.
Best Regards,
Gilles

try
$ cat /proc/version

Yeah likely he compiled the kernel using an older knoppix.

[ruymbeke]

try: $ cat /proc/version
Yeah likely he compiled the kernel using an older knoppix.

Hi kl522,
Here you go, I remember that Klaus mentioned once that he was using an eepc for development
and yes Knoppix 7.0.3 is using a more recent version of gcc 4.7.1-2 than the one used to compile
the kernel (gcc 4.7.1-1) as you read below. So I need to either downgrade gcc to 4.7.1-1 or use
a previous version of Knoppix which still uses that version of gcc. I would be nice to have installed
on Knoppix the correct version of gcc to recompile the kernel without complication. I guess this is a
suggestion for improvement that Klaus may consider to use on his next release.
Thanks for your help.
Best Regards,
Gilles

root@Knoppix:/# cat /proc/version
Linux version 3.4.4 (root@eeepc) (gcc version 4.7.0 (Debian 4.7.1-1) ) #14 SMP PREEMPT Sat Jun 23 20:07:21 CEST 2012
root@Knoppix:/# gcc --version
gcc (Debian 4.7.1-2) 4.7.1
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[kl522]

Hi kl522,
Here you go, I remember that Klaus mentioned once that he was using an eepc for development
and yes Knoppix 7.0.3 is using a more recent version of gcc 4.7.1-2 than the one used to compile
the kernel (gcc 4.7.1-1) as you read below. So I need to either downgrade gcc to 4.7.1-1 or use
a previous version of Knoppix which still uses that version of gcc. I would be nice to have installed
on Knoppix the correct version of gcc to recompile the kernel without complication. I guess this is a
suggestion for improvement that Klaus may consider to use on his next release.
Thanks for your help.
Best Regards,
Gilles

root@Knoppix:/# cat /proc/version
Linux version 3.4.4 (root@eeepc) (gcc version 4.7.0 (Debian 4.7.1-1) ) #14 SMP PREEMPT Sat Jun 23 20:07:21 CEST 2012
root@Knoppix:/# gcc --version
gcc (Debian 4.7.1-2) 4.7.1
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

The module file can be edited manually. I have done before, after editing the module using vi, if the length of string remains, the module can be loaded. Or perhaps insmod has a force option to forcefully load a module.

[kl522]

The module file can be edited manually. I have done before, after editing the module using vi, if the length of string remains, the module can be loaded. Or perhaps insmod has a force option to forcefully load a module.

Perhaps can try this :-

# sed -i -e 's/GCC: (Debian 4.7.1-2) 4.7.1/GCC: (Debian 4.7.1-1) 4.7.0/g' oprofile.ko

Might be faster than other methods.

[ruymbeke]

... sed -i -e 's/GCC: (Debian 4.7.1-2) 4.7.1/GCC: (Debian 4.7.1-1) 4.7.0/g' oprofile.ko ...

Nice trick but the module still does not load because of Unknown symbols.
I may have to overlay the kernel and all the modules ...

[kl522]

Too bad then, I think other things are probably changed too. Maybe can still try modprobe -f.

[ruymbeke]

...So I need to either downgrade gcc to 4.7.1-1 or use a previous version of Knoppix...

Well Knoppix 7.0.2 is using an older version of gcc 4.6.3-7 so I will need to downgrade gcc on Knoppix 7.0.3.
So what is the easiest way to find and reinstall an older version of gcc ?
apt-get -y --reinstall install gcc-4.7=4.7.1 does not work: "E: Version '4.7.1' for 'gcc-4.7' was not found"
Best Regards,
Gilles