[Clfs-support] libraries for booting temporary system

[Alexander Roalter]

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Joe Ciccone wrote:
> Alexander Roalter wrote:
>> Joe Ciccone wrote:
>>> Alexander Roalter wrote:
>>>> after compiling the temporary system (SVN, for pure64 x86_64) and
>>>> booting it I got the error
>>>>
>>>> Kernel panic: no init found. Try passing init= option to kernel...
>>>>
>>>> looking into it (and comparing with my host system), /sbin/init is
>>>> linked shared, while my original init (opensuse 11.0) is linked static.
>>>> So contrary to ch. 7.5 I changed the src/Makefile in sysvinit-2.86 the
>>>> line LDFLAGS=-s to LDFLAGS=-s -static
>>>>
>>>> then I got a static init, and the system booted up until the shell
>>>> should have been started with the error: /bin/sh: No such file or
>>>> directory
>>>>
>>>> The problem is: all the files in /bin don't know where to look for the
>>>> libraries, which are located in /tools/lib, and not in /lib.
>>>>
>>>> So if I copy all files from /tools/lib to lib, everything works and I
>>>> get the login prompt and I also can log in...
>>>>
>>>> Now, since this is not described in the book, what has to be done that
>>>> the executable from the temporary system know how to find their
>>>> libraries? I would assume one could use ld.so.cache and set up the
>>>> search path to /tools/lib, but nothing of this kind is done...
>>>>
>>>> Any suggestions?
>>> It shoulds like you're linking against host libraries, init does not
>>> have to be static. My first guess would be that you did not compile gcc
>>> final cross (2nd gcc build) with the specs patch. This would leave your
>>> system attached to /lib/ld.so instead of /tools/lib/ld.so which is gone
>>> once you chroot/boot. You can verify this by running readelf -l
>>> /tools/bin/sh | grep interpreter
>> as expected, it returns
>>
>> clfs:~$ readelf -l /tools/bin/bash | grep interpreter
>> [Requesting program interpreter: /lib/ld-linux-x86-64.so.2]
>>
>> which is bad.
>> On building GCC in chapter 6.9, even gcc-build/gcc/g++ shows the same
>> behavior:
>>
>> clfs:~/sources/gcc-build$ readelf -l ./g++ | grep interpreter
>> [Requesting program interpreter: /lib/ld-linux-x86-64.so.2]
>>
>> so the modified startfile SPEC, that should look first in /tools/lib
>> seems not to have influenced the build... Is there something where one
>> can see which spec file is used?
> http://cross-lfs.org/view/svn/x86_64-64/cross-tools/gcc-final.html .
> During the building of gcc-final in cross-tools you did not apply the
> pure64_specs patch. I'm not sure if you used the same source directory
> but you shouldn't have done that if you did. basically you have to start
> over. Rebuild gcc-final and then rebuild all of /tools.


Now I see, tried it again in 6.9 which is of course much too late.
doing it in 5.15 does the trick, and I don't have to boot, but can do
chroot.

One thing though now I have a problem with:

compiling util-linux, I get
../lib/fsprobe.c:13:19: error: blkid.h: No such file or directory

in /tools/include there's no blkid subdir or blkid.h, as blkid and
libblkid are IN util-linux...

- --
Cheers,
Alex
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