Re: [gentoo-amd64] Re: revdep-rebuild, Firefox, Thunderbird, GCC

[Lie Ryan]

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John P. Burkett wrote:
> Lie Ryan wrote:
>> John P. Burkett wrote:
>>>> However, that doesn't seem to be the issue here, which brings us to
>>>> reason #2.  The ati-drivers include a kernel driver, which must be
>>>> compiled against a kernel that has been built so the proper parts of it
>>>> are exposed for the drivers to use.  The kernel must reside at /usr/src/
>>>> linux.  If you look at the error above, it found the directory all right,
>>>> but it didn't find what it needed in it.  Have you built your kernel
>>>> using those sources, with your new gcc, yet?  Did you leave the working
>>>> files exposed for ati-drivers to use if so, or did you cleanup using make
>>>> clean, or something?
>>> Going to /usr/src and doing "ls -l" elicits the following:
>>> lrwxrwxrwx  1 root root   22 Sep  3  2007 linux -> linux-2.6.22-gentoo-r2
>>> drwxr-xr-x 19 root root 1088 Jun  8 01:16 linux-2.6.22-gentoo-r2
>>> So linux appears to be symbolic link to linux-2.6.22-gentoo-r2
>>> Going to /usr/src/linux-2.6.22-gentoo-r2 and doing "ls -l" produces the
>>> following:
>> The latest gentoo kernel is 2.6.29-gentoo-r5, AFTER this problem is
>> solved, probably you can consider upgrading the kernel as well (we don't
>> want kernel upgrade problems get compounded with gcc problem, do we?).
>> For now, perhaps you can recompile with the same (working -- I assumed)
>> .config (we also don't want configuration mistakes compounding compile
>> problem for now)
>
> Thank you, Lie. Learning to upgrade the kernel is on my to-do list. When
> you say recompile with the same .config, are you referring to
> recompiling the kernel?  Several .config files are on my system. My
> first guess is that the relevant one is
> /usr/src/linux-2.6.22-gentoo-r2/.config
> Its first lines are the following:
> # Automatically generated make config: don't edit
> # Linux kernel version: 2.6.22-gentoo-r2
> #
> # Tue Sep  4 10:25:14 2007
> CONFIG_X86_64=y
> CONFIG_64BIT=y

Yes, as you have found out, there is a file named ".config" inside the
kernel sources' directory; you usually edit this with "make menuconfig"
or one of the GUI config tools. After configuration is done just do
"make  all", "make modules_install", and install it on the /boot
partition (for full tutorial see the gentoo documentation)

>>> -rw-r--r--  1 root root  252456 Sep  4  2007 Module.symvers
>>> -rw-r--r--  1 root root 1418737 Sep  4  2007 System.map
>>> drwxr-xr-x  4 root root      96 Jun  8 01:16 arch
>>> drwxr-xr-x  2 root root     752 Jun  8 01:16 block
>>> drwxr-xr-x  2 root root    6640 Jun  8 01:16 crypto
>>> drwxr-xr-x 35 root root     968 Jun  8 01:16 drivers
>>> drwxr-xr-x 35 root root    4936 Jun  8 01:16 fs
>>> drwxr-xr-x  5 root root     152 Jun  8 01:16 include
>>> drwxr-xr-x  2 root root     736 Jun  8 01:16 init
>>> drwxr-xr-x  2 root root     680 Jun  8 01:16 ipc
>>> drwxr-xr-x  5 root root    3832 Jun  8 01:16 kernel
>>> drwxr-xr-x  4 root root    4512 Jun  8 01:16 lib
>>> drwxr-xr-x  2 root root    2616 Jun  8 01:16 mm
>>> drwxr-xr-x 23 root root     856 Jun  8 01:16 net
>>> drwxr-xr-x  6 root root     320 Jun  8 01:16 scripts
>>> drwxr-xr-x  2 root root     208 Jun  8 01:16 security
>>> drwxr-xr-x 16 root root     904 Jun  8 01:16 sound
>>> drwxr-xr-x  2 root root     424 Jun  8 01:16 usr
>>> -rwxr-xr-x  1 root root 9388791 Sep  4  2007 vmlinux
>>> The June 8 date is a surprise to me because I did not intentionally do
>>> anything to this directory then.
>> I guess, maybe portage re-emerge'd the source at Jun 8
>>
>>>> My guess is that you need to build your kernel with the new gcc, and then
>>>> ati-drivers will hopefully compile.
>>> Is there anyway to tell whether the kernel is built with the new gcc?
>> You can do:
>> $ cat /proc/version
> Doing that produces the following response:
> Linux version 2.6.22-gentoo-r2-osmp (root@microway) (gcc version 4.1.2
> (Gentoo 4.1.2)) #2 SMP Mon Sep 3 21:52:26 EDT 2007
>
> Doing "gcc -v" produces output whose final line is
> gcc version 4.3.2 (Gentoo 4.3.2-r3 p1.6, pie-10.1.5)
>
> I take this to mean that the kernel is not built with the new gcc.
> Should I now try to rebuild the kernel with the new gcc?  Never having
> rebuilt a kernel, I'd welcome advice about how to do it.

Before rebuilding your kernel, make sure to have a spare Live CD and
always a spare working kernel in /boot. For first time building, be
conservative on changing the .config; the priority would be to identify
which options are required to have a kernel that (at least) boots. For a
successful boot, the most important options are the ones related to your
harddisk and filesystem...

Configuring the kernel is kind of guesswork at first, although a more
intelligent guessess can be made by looking at lsmod, lspci, lshw, and
/proc/cpuinfo on a working kernel.

Tips: change the CONFIG_LOCAL_VERSION (General Setup -> Local Version -
append to kernel release) for every recompilation. By having a unique
version string for each recompiling, kernel modules from previous
recompilation of the same kernel version wouldn't get mixed up with the
new recompilation.
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