mips64-linux-ld: lib/math/div64.c:undefined reference to `__multi3'

mips64-linux-ld: lib/math/div64.c:undefined reference to `__multi3'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a66191c590b3b58eaff05d2277971f854772bd5b
commit: d10bb374c41e4c4dced04ae7d2fe2d782a5858a0 lib: mul_u64_u64_div_u64(): optimise the divide code
date:   9 weeks ago
config: mips-randconfig-r062-20260122 (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/config)
compiler: mips64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601222217.uzed54La-lkp@intel.com/

All errors (new ones prefixed by >>):

   mips64-linux-ld: mips64-linux-ld: lib/math/div64.o: unable to get decompressed section .debug_info
   lib/math/div64.o: in function `mul_u64_add_u64_div_u64':
   lib/math/div64.c:(.text+0x60): undefined reference to `__multi3'
>> mips64-linux-ld: lib/math/div64.c:(.text+0x188): undefined reference to `__multi3'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: mips64-linux-ld: lib/math/div64.c:undefined reference to `__multi3'

[David Laight]

On Thu, 22 Jan 2026 22:43:28 +0800
kernel test robot <lkp@intel.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   a66191c590b3b58eaff05d2277971f854772bd5b
> commit: d10bb374c41e4c4dced04ae7d2fe2d782a5858a0 lib: mul_u64_u64_div_u64(): optimise the divide code
> date:   9 weeks ago
> config: mips-randconfig-r062-20260122 (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/config)
> compiler: mips64-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202601222217.uzed54La-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    mips64-linux-ld: mips64-linux-ld: lib/math/div64.o: unable to get decompressed section .debug_info
>    lib/math/div64.o: in function `mul_u64_add_u64_div_u64':
>    lib/math/div64.c:(.text+0x60): undefined reference to `__multi3'
> >> mips64-linux-ld: lib/math/div64.c:(.text+0x188): undefined reference to `__multi3'  
> 

Known error, duplicate of a different build.
Really a bug in gcc, fixable by changing the compiler version in a test.

	David

Re: mips64-linux-ld: lib/math/div64.c:undefined reference to `__multi3'

[Philip Li]

On Thu, Jan 22, 2026 at 02:57:52PM +0000, David Laight wrote:
> On Thu, 22 Jan 2026 22:43:28 +0800
> kernel test robot <lkp@intel.com> wrote:
> 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   a66191c590b3b58eaff05d2277971f854772bd5b
> > commit: d10bb374c41e4c4dced04ae7d2fe2d782a5858a0 lib: mul_u64_u64_div_u64(): optimise the divide code
> > date:   9 weeks ago
> > config: mips-randconfig-r062-20260122 (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/config)
> > compiler: mips64-linux-gcc (GCC) 8.5.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601222217.uzed54La-lkp@intel.com/reproduce)
> > 
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202601222217.uzed54La-lkp@intel.com/
> > 
> > All errors (new ones prefixed by >>):
> > 
> >    mips64-linux-ld: mips64-linux-ld: lib/math/div64.o: unable to get decompressed section .debug_info
> >    lib/math/div64.o: in function `mul_u64_add_u64_div_u64':
> >    lib/math/div64.c:(.text+0x60): undefined reference to `__multi3'
> > >> mips64-linux-ld: lib/math/div64.c:(.text+0x188): undefined reference to `__multi3'  
> > 
> 
> Known error, duplicate of a different build.
> Really a bug in gcc, fixable by changing the compiler version in a test.

Got it David, we will avoid further reporting on this. Sorry for the false positive.

> 
> 	David
>