vmlinuz no symtab? while cross compiling...

vmlinuz no symtab? while cross compiling...

[Jon Anderson]

I'm attempting to cross compile linux-2.6.8.1, along with a few external 
modules (madwifi, hostap-driver, aodv-uu). The kernel and (built-in) 
modules compile fine, but compiling every one of those external modules 
fails around MODPOST. For example, aodv-uu:

<snip userspace stuff>
make -C /home/janderson/var/autobuild/i386/root/usr/src/linux 
SUBDIRS=/home/janderson/var/tmp/autobuild/aodv-uu-0.8.1 modules
i486-linux-uclibc-gcc -Wall -O2 -DCONFIG_GATEWAY  -o aodvd main.o list.o 
debug.o timer_queue.o aodv_socket.o aodv_hello.o aodv_neighbor.o 
aodv_timeout.o routing_table.o seek_list.o k_route.o aodv_rreq.o 
aodv_rrep.o aodv_rerr.o packet_input.o packet_queue.o libipq.o icmp.o 
min_ipenc.o locality.o
make[1]: Entering directory 
`/home/janderson/var/autobuild/i386/root/usr/src/linux-2.6.8.1'
  CC [M]  /home/janderson/var/tmp/autobuild/aodv-uu-0.8.1/kaodv.o
  Building modules, stage 2.
  MODPOST
modpost: vmlinux no symtab?
/bin/sh: line 1:   798 Aborted                 scripts/mod/modpost -i 
/home/janderson/var/autobuild/i386/root/usr/src/linux-2.6.8.1/Module.symvers 
vmlinux /home/janderson/var/tmp/autobuild/aodv-uu-0.8.1/kaodv.o
make[2]: *** [__modpost] Error 134

madwifi and hostap-driver do the same thing: "vmlinux no symtab?".

I've messed around with cleaning out the scripts/mod directory, then 
running a make prepare (which seems to rebuild modpost), but that makes 
no difference.

For the moment, I can work around this (because I'm "cross compiling" 
for i486 on an i686 system) by just running make again in the kernel 
directory, but I would assume that wouldn't work when I have to do it 
for ppc. :-)

I guess I'm just looking for any information that might help me get rid 
of this error. Any pointers would be most welcome.

(Hopefully this is the right place to be posting such questions - if 
it's not, then I appologize.)

Cheers,

jon

Re: vmlinuz no symtab? while cross compiling...

[Sam Ravnborg]

On Thu, Aug 19, 2004 at 02:37:19AM -0400, Jon Anderson wrote:
> I'm attempting to cross compile linux-2.6.8.1, along with a few external 
> modules (madwifi, hostap-driver, aodv-uu). The kernel and (built-in) 
> modules compile fine, but compiling every one of those external modules 
> fails around MODPOST. For example, aodv-uu:

Took a look at aodv-uu.
Author should learn to create a real Kbuild Makefile...
But that does not seem to be your problem.

> <snip userspace stuff>
> make -C /home/janderson/var/autobuild/i386/root/usr/src/linux 
> SUBDIRS=/home/janderson/var/tmp/autobuild/aodv-uu-0.8.1 modules
> i486-linux-uclibc-gcc -Wall -O2 -DCONFIG_GATEWAY  -o aodvd main.o list.o 
> debug.o timer_queue.o aodv_socket.o aodv_hello.o aodv_neighbor.o 
> aodv_timeout.o routing_table.o seek_list.o k_route.o aodv_rreq.o 
> aodv_rrep.o aodv_rerr.o packet_input.o packet_queue.o libipq.o icmp.o 
> min_ipenc.o locality.o
> make[1]: Entering directory 
> `/home/janderson/var/autobuild/i386/root/usr/src/linux-2.6.8.1'
>  CC [M]  /home/janderson/var/tmp/autobuild/aodv-uu-0.8.1/kaodv.o
>  Building modules, stage 2.
>  MODPOST
> modpost: vmlinux no symtab?
modpost complains that it cannot locate the symbol table in vmlinux.
That can be caused by the following reasons:

o vmlinux were build with different settings than scripts/mod
  - If you cleaned out scripts/mod/ and run make scripts with wrong ARCH options
o vmlinux has been stripped for some reason

> /bin/sh: line 1:   798 Aborted                 scripts/mod/modpost -i 
> /home/janderson/var/autobuild/i386/root/usr/src/linux-2.6.8.1/Module.symvers 
> vmlinux /home/janderson/var/tmp/autobuild/aodv-uu-0.8.1/kaodv.o
> make[2]: *** [__modpost] Error 134
> 
> madwifi and hostap-driver do the same thing: "vmlinux no symtab?".
> 
> I've messed around with cleaning out the scripts/mod directory, then 
> running a make prepare (which seems to rebuild modpost), but that makes 
> no difference.
> 
> For the moment, I can work around this (because I'm "cross compiling" 
> for i486 on an i686 system) by just running make again in the kernel 
> directory, but I would assume that wouldn't work when I have to do it 
> for ppc. :-)
Did not understand what you said here.


Please make sure that:
- Kernel is build with same ARCH=, CROSS_COMPILE option as modules
- That kernel is fully build, with same options

Please let me know if this info helped you fixing the problem.

	Sam

Re: vmlinuz no symtab? while cross compiling...

[Sam Ravnborg]

On Fri, Aug 20, 2004 at 12:04:20AM +0200, Sam Ravnborg wrote:
> On Thu, Aug 19, 2004 at 02:37:19AM -0400, Jon Anderson wrote:
> > I'm attempting to cross compile linux-2.6.8.1, along with a few external 
> > modules (madwifi, hostap-driver, aodv-uu). The kernel and (built-in) 
> > modules compile fine, but compiling every one of those external modules 
> > fails around MODPOST. For example, aodv-uu:
> 
> Took a look at aodv-uu.
> Author should learn to create a real Kbuild Makefile...
> But that does not seem to be your problem.
Actually it was not that bad for 2.6 - but 2.4 could use some help.

> > modpost: vmlinux no symtab?
> modpost complains that it cannot locate the symbol table in vmlinux.
> That can be caused by the following reasons:
> 
> o vmlinux were build with different settings than scripts/mod
>   - If you cleaned out scripts/mod/ and run make scripts with wrong ARCH options
> o vmlinux has been stripped for some reason

The last item on the list was the culprint in this case.

	Sam