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* proc.c:undefined reference to `strcmp'
@ 2019-01-22 10:08 kbuild test robot
  2019-01-22 11:44 ` Geert Uytterhoeven
  0 siblings, 1 reply; 3+ messages in thread
From: kbuild test robot @ 2019-01-22 10:08 UTC (permalink / raw)
  To: Olof Johansson; +Cc: kbuild-all, linux-kernel

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Hi Olof,

It's probably a bug fix that unveils the link errors.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   47bfa6d9dc8c060bf56554a465c9031e286d2f80
commit: 35004f2e55807a1a1491db24ab512dd2f770a130 lib/genalloc.c: include vmalloc.h
date:   2 weeks ago
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gnu-gcc (Debian 8.2.0-11) 8.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 35004f2e55807a1a1491db24ab512dd2f770a130
        # save the attached .config to linux build tree
        GCC_VERSION=8.2.0 make.cross ARCH=m68k 

All errors (new ones prefixed by >>):

   m68k-linux-gnu-ld: block/partitions/ldm.o: in function `ldm_partition':
   ldm.c:(.text+0x1900): undefined reference to `strcmp'
   m68k-linux-gnu-ld: ldm.c:(.text+0x1964): undefined reference to `strcmp'
   m68k-linux-gnu-ld: drivers/rtc/proc.o: in function `is_rtc_hctosys':
>> proc.c:(.text+0x18c): undefined reference to `strcmp'
   m68k-linux-gnu-ld: drivers/watchdog/watchdog_pretimeout.o: in function `watchdog_register_governor':
   watchdog_pretimeout.c:(.text+0x142): undefined reference to `strcmp'
   m68k-linux-gnu-ld: drivers/devfreq/devfreq.o: in function `try_then_request_governor':
   devfreq.c:(.text+0x9c6): undefined reference to `strcmp'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: proc.c:undefined reference to `strcmp'
  2019-01-22 10:08 proc.c:undefined reference to `strcmp' kbuild test robot
@ 2019-01-22 11:44 ` Geert Uytterhoeven
  2019-01-24  9:55   ` [kbuild-all] " Rong Chen
  0 siblings, 1 reply; 3+ messages in thread
From: Geert Uytterhoeven @ 2019-01-22 11:44 UTC (permalink / raw)
  To: kbuild test robot; +Cc: Olof Johansson, kbuild-all, Linux Kernel Mailing List

On Tue, Jan 22, 2019 at 11:11 AM kbuild test robot <lkp@intel.com> wrote:
> It's probably a bug fix that unveils the link errors.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   47bfa6d9dc8c060bf56554a465c9031e286d2f80
> commit: 35004f2e55807a1a1491db24ab512dd2f770a130 lib/genalloc.c: include vmalloc.h
> date:   2 weeks ago
> config: m68k-allmodconfig (attached as .config)
> compiler: m68k-linux-gnu-gcc (Debian 8.2.0-11) 8.2.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 35004f2e55807a1a1491db24ab512dd2f770a130
>         # save the attached .config to linux build tree
>         GCC_VERSION=8.2.0 make.cross ARCH=m68k
>
> All errors (new ones prefixed by >>):
>
>    m68k-linux-gnu-ld: block/partitions/ldm.o: in function `ldm_partition':
>    ldm.c:(.text+0x1900): undefined reference to `strcmp'
>    m68k-linux-gnu-ld: ldm.c:(.text+0x1964): undefined reference to `strcmp'
>    m68k-linux-gnu-ld: drivers/rtc/proc.o: in function `is_rtc_hctosys':
> >> proc.c:(.text+0x18c): undefined reference to `strcmp'
>    m68k-linux-gnu-ld: drivers/watchdog/watchdog_pretimeout.o: in function `watchdog_register_governor':
>    watchdog_pretimeout.c:(.text+0x142): undefined reference to `strcmp'
>    m68k-linux-gnu-ld: drivers/devfreq/devfreq.o: in function `try_then_request_governor':
>    devfreq.c:(.text+0x9c6): undefined reference to `strcmp'

I guess this bisection is a false positive. Have you just upgraded to gcc 8?
Gcc 8 replaces the strncmp() in is_rtc_hctosys() to strcmp().
Will be fixed in v5.1 by
https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git/commit/?h=for-v5.1&id=28713169d879b67be2ef2f84dcf54905de238294

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [kbuild-all] proc.c:undefined reference to `strcmp'
  2019-01-22 11:44 ` Geert Uytterhoeven
@ 2019-01-24  9:55   ` Rong Chen
  0 siblings, 0 replies; 3+ messages in thread
From: Rong Chen @ 2019-01-24  9:55 UTC (permalink / raw)
  To: Geert Uytterhoeven, kbuild test robot
  Cc: Olof Johansson, kbuild-all, Linux Kernel Mailing List


On 1/22/19 7:44 PM, Geert Uytterhoeven wrote:
> On Tue, Jan 22, 2019 at 11:11 AM kbuild test robot <lkp@intel.com> wrote:
>> It's probably a bug fix that unveils the link errors.
>>
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   47bfa6d9dc8c060bf56554a465c9031e286d2f80
>> commit: 35004f2e55807a1a1491db24ab512dd2f770a130 lib/genalloc.c: include vmalloc.h
>> date:   2 weeks ago
>> config: m68k-allmodconfig (attached as .config)
>> compiler: m68k-linux-gnu-gcc (Debian 8.2.0-11) 8.2.0
>> reproduce:
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          git checkout 35004f2e55807a1a1491db24ab512dd2f770a130
>>          # save the attached .config to linux build tree
>>          GCC_VERSION=8.2.0 make.cross ARCH=m68k
>>
>> All errors (new ones prefixed by >>):
>>
>>     m68k-linux-gnu-ld: block/partitions/ldm.o: in function `ldm_partition':
>>     ldm.c:(.text+0x1900): undefined reference to `strcmp'
>>     m68k-linux-gnu-ld: ldm.c:(.text+0x1964): undefined reference to `strcmp'
>>     m68k-linux-gnu-ld: drivers/rtc/proc.o: in function `is_rtc_hctosys':
>>>> proc.c:(.text+0x18c): undefined reference to `strcmp'
>>     m68k-linux-gnu-ld: drivers/watchdog/watchdog_pretimeout.o: in function `watchdog_register_governor':
>>     watchdog_pretimeout.c:(.text+0x142): undefined reference to `strcmp'
>>     m68k-linux-gnu-ld: drivers/devfreq/devfreq.o: in function `try_then_request_governor':
>>     devfreq.c:(.text+0x9c6): undefined reference to `strcmp'
> I guess this bisection is a false positive. Have you just upgraded to gcc 8?

yes, we upgraded to gcc 8 recently.


> Gcc 8 replaces the strncmp() in is_rtc_hctosys() to strcmp().
> Will be fixed in v5.1 by
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git/commit/?h=for-v5.1&id=28713169d879b67be2ef2f84dcf54905de238294

Thanks for your explanation. we'll blacklist it.

Best Regards,
Rong Chen


>
> Gr{oetje,eeting}s,
>
>                          Geert
>

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-01-24  9:55 UTC | newest]

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2019-01-22 10:08 proc.c:undefined reference to `strcmp' kbuild test robot
2019-01-22 11:44 ` Geert Uytterhoeven
2019-01-24  9:55   ` [kbuild-all] " Rong Chen

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