Thread (6 messages) 6 messages, 3 authors, 2009-12-20

Re: drivers/gpu/drm/radeon/radeon_test.c:45: undefined reference to

From: Dave Hylands <hidden>
Date: 2009-12-19 09:13:22
Also in: lkml

Hi Jim,

On Fri, Dec 18, 2009 at 12:54 PM, Mr. James W. Laferriere
[off-list ref] wrote:
       Hello Benjamin ,  I am not having a good time compiling 2.6.32.1 .
First RCU 'inline' difficulties then fusion-mpt 'inline' difficulty ,  Now
this .
       This one is not a simple as removing 'inline' from a statement .
       Would you please look into this ?  Anything else you need please just
ask .
       Please cc: me as I am not subscribed to linux-fbdev .

               Tia ,  JimL
...snip...
drivers/built-in.o(.text+0x11345a): In function `radeon_test_moves':
drivers/gpu/drm/radeon/radeon_test.c:45: undefined reference to `__udivdi3'
make: *** [.tmp_vmlinux1] Error 1
__udivdi3 is a gcc helper function used to do 64-bit division. This
form of 64-bit division is not supported from within the kernel (which
is why you get the undefined symbol).

There is <asm/div64.h> which contains a macro called do_div which can
perform a 64-bit dvision by a 32-bit divisor.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/
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