Martin J. Bligh wrote:
>>>>Compiling misc.c with -O0 gives a better error message:
>>>>
>>>><--  snip  -->
>>>>
>>>>...
>>>>ld -m elf_i386 -Ttext 0x100000 -e startup_32 -o bvmlinux head.o misc.o
>>>>piggy.o
>>>>misc.o: In function `outb_quad':
>>>>misc.o(.text+0x289c): undefined reference to `__io_virt_debug'
>>>>make[2]: *** [bvmlinux] Error 1
>>>>make[2]: Leaving directory
>>>>`/home/bunk/linux/kernel-2.5/linux-2.5.14-modular/arch/i386/boot/compressed'
>>>
>>>Seems like you're not linking in lib/iodebug.c for some reason.
>>>
>>>outb_quad calls readb, which calls __io_virt, which calls __io_virt_debug,
>>>which is defined in iodebug.c
>>
>>It's in the boot decompression code, before any of that stuff is
>>available.  I'm working on a patch.
> 
> 
> Is this arch/i386/boot/compressed/misc.c ?
> I can't see how it would be doing outb_quad, and even if it was, it
> would be totally pointless, as xquad_portio isn't set yet ....
> 
> M.
> 

This patch fixes the compile problem, but I'm not quite convinced it's 
the best solution.  The decompressor is a completely seperate 
environment from the kernel, so including kernel headers continues to 
invite problems like this in the future.

-- 

						Brian Gerst