[uml-devel] problems making UML binary

[uml-devel] problems making UML binary

[adamdabr]

Hello,

Could you please help me with the following problem? 

Here's a problem I've encountered when trying to compile an UML (User Mode Linux) linux binary: 

Details: 

1) I am working with Mandrake 10.1 Official distribution
2) I got 2.4.27 kernel and uml patch 2.4.27-1
3) Applied the patch - worked well
4) Did make xconfig ARCH=um and saved standard configuration
5) Then I've tried make linux ARCH=um but got problems:
	a) with gcc 3.4.1 that I started with (standard Mandrake 10.1 instalation) I've got a lot of errors like: 

"sched.c:839: error: conflicting types for 'sleep_on_timeout' 

/home/adam/work/UML/linux-2.4.27/include/linux/sched.h:598: error: previous declaration of 'sleep_on_timeout' 

was here" 

So I guessed it was a gcc/Mandrake problem..
	b) with gcc 3.3.1-2mdk or gcc 2.96-063mdk I got another problem - make linux ARCH=um runs smooth 

until it gets to linking: here is what I've got:
"ld -r -o unmap_fin.o unmap.o -lc -L/usr/lib
ld: cannot find -lc
make[3]: *** [unmap_fin.o] Error 1
make[3] Leaving directory `/home/adam/work/UML/linux-2.4.27/arch/um/kernel/tt'
..."

Could anybody please help me? My goal is to get UML in order to make some changes to kernel (A patch I've got 

to write), so downloading binary linux with maps&config is no solution - I need to be able to compile this. And I 

guess I need to start with raw UML working :\ 
What should I do?

P.S As you can see, I am not building it in /usr/src/linux

Thank you,
Adam


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Re: [uml-devel] problems making UML binary

[Blaisorblade]

On Tuesday 15 February 2005 16:49, adamdabr@poczta.onet.pl wrote:
> Hello,
>
> Could you please help me with the following problem?
>
> Here's a problem I've encountered when trying to compile an UML (User Mode
> Linux) linux binary:

> 5) Then I've tried make linux ARCH=um but got problems:
>  a) with gcc 3.4.1 that I started with (standard Mandrake 10.1 instalation)
> I've got a lot of errors like:
>
> "sched.c:839: error: conflicting types for 'sleep_on_timeout'
>
> /home/adam/work/UML/linux-2.4.27/include/linux/sched.h:598: error: previous
> declaration of 'sleep_on_timeout'
>
> was here"
No idea about this (yet)... maybe GCC became stricter about declaration 
consistency... Since the problem happens probably with i386, too, you might 
try the latest 2.4 with the same patch applied.

> So I guessed it was a gcc/Mandrake problem..
>  b) with gcc 3.3.1-2mdk or gcc 2.96-063mdk I got another problem - make
> linux ARCH=um runs smooth

> until it gets to linking: here is what I've got:
> "ld -r -o unmap_fin.o unmap.o -lc -L/usr/lib
> ld: cannot find -lc
> make[3]: *** [unmap_fin.o] Error 1
> make[3] Leaving directory
> `/home/adam/work/UML/linux-2.4.27/arch/um/kernel/tt' ..."

This is a message caused by missing /usr/lib/libc.a - install 
glibc-static-devel and this one *should* work fine. Actually, in my 
experience, gcc 3.3.2 from Mandrake 10 Official miscompiles UML / 2.4 (not 
reproducible with UML / 2.6). gcc 3.2.2 from Mandrake 9.1 installs and works 
well (use make ARCH=um CC='gcc-3.2.2' after installing it)... I've no 
experience with the 3.3.1 one.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade




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