[ELDK] Ubuntu 804 ELDK 4.0 kernel rebuild issues

Bruce Reiss bwr64x at calcentral.com
Fri Jul 4 00:07:04 CEST 2008

Bruce W Reiss, pronounced "hey dude" since I'm in California  :)
bwr is my email/code comment tag

I've been running everything in /opt, the ELDK installation, the kernel image, 
and my driver development directories. I keep all "work" stuff seperate from my 
home directory to simplify backups and such. Does this cause issues since root 
owns /opt? I'm fairly new at Linux/kernel make/driver development, so basic 
"better to do it this way" comments are appropriate.

Building the kernel in user mode resulted:

bwr at main:/opt/ddc-linux-2.6.18$ make
rm: cannot remove `include/config/kernel.release': Permission denied
make: *** [include/config/kernel.release] Error 1
bwr at main:/opt/ddc-linux-2.6.18$

This is when I ran "$ sudo make" instead and got further, but with the later 
issues I noted.

I'll try building the kernel elsewhere, after I correct my ELDKv4.0 install 
issue from the other thread.

Thanks for the suggestions,

Detlev Zundel wrote:
> Hi bwr (how does one pronounce that?),
>> I've run into a couple of obscure issues using the ELDK under Ubuntu 8.04. They 
>> probably aren't really ELDK issues, but they appear to be, and I spent a lot of 
>> time looking for ELDK issues until I resolved it. Suggestions on where else to 
>> post this information would be useful.
>> The task is cross compiling a Linux kernel
>> Ubuntu 8.04 host system
>> ELDK v4.0
>> ppc_8540 based target board
>> Linux kernel 2.6.18
>> U-Boot 1.2.0 modified
>> By default, Ubuntu does not have:
>> /usr/include/sys/types.h   (you need to install package libc6-dev)
> Yes, without doing this, you will have a hard time compiling anything ;)
>> /usr/include/curses.h      (install libncurses5-dev)
> Needed only for make menuconfig.
>> Once these were there, attempting to "$ make" returns a permission violation. 
> Ooops, you will need to expand on that.  This is not a problem if you do
> everything correctly.
>> Trying "$ sudo make" (the recommended Ubuntu way) will run for awhile, then 
>> result in an error message saying
>> *** 2.6 kernels no longer build correctly with old versions of binutils.
>> *** Please upgrade your binutils to 2.12.1 or newer
>> This is from ..Linux/arch/ppc/Makefile
> There is really no need at all to run the kernel make as root.
>> Which seems to indicate the ELDK has an old version of binutils. This is not the 
>> case. What has happened is that the make process has lost the value of 
>> CROSS_COMPILE (although it still has ARCH, unless it get reset somewhere). 
>> Without CROSS_COMPILE, the makefile uses the native gcc assembler instead of the 
>> ELDK version, gets confused and returns the above error message.
>> If instead of "$ sudo make" you run "$ sudo -s" to switch to root, then "$ make" 
>> it works fine, CROSS_COMPILE is not lost, and the kernel rebuilds.
> No, no, you have different problems.  We never build kernels as
> superuser.
> Is it possible that you try to build a kernel below /usr/src or any
> other central place having restrictive permissions?  Don't do that.
> Clone our linux-2.6-denx repo somewhere below your home directory and
> work there.
> Cheers
>   Detlev
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