[PATCH] sandbox: solve undefined reference to pthread_kill symbol

[Anshul Dalal]

Hi Raymond,

On Wed Jun 4, 2025 at 2:30 AM IST, Raymond Mao wrote:
> Hi Tom,
>
> On Tue, 3 Jun 2025 at 15:23, Tom Rini <trini at konsulko.com> wrote:
>>
>> On Tue, Jun 03, 2025 at 02:00:23PM -0400, Raymond Mao wrote:
>> > Hi Tom,
>> >
>> > On Tue, 3 Jun 2025 at 11:47, Tom Rini <trini at konsulko.com> wrote:
>> > >
>> > > On Tue, Jun 03, 2025 at 08:13:58AM -0700, Raymond Mao wrote:
>> > >
>> > > > This patch is to solve the sandbox building error:
>> > > > $ make O=build-sandbox -s sandbox_defconfig
>> > > > $ make O=build-sandbox -s -j2
>> > > > /usr/bin/ld: /tmp/u-boot.27rzOu.ltrans58.ltrans.o: undefined reference to symbol 'pthread_kill@@GLIBC_2.2.5'
>> > > > /usr/bin/ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
>> > > > collect2: error: ld returned 1 exit status
>> > > > [...]
>> > > >
>> > > > Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
>> > > > ---
>> > > >  arch/sandbox/config.mk | 2 +-
>> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
>> > >
>> > > OK, but how do you get this failure to start with? What host?
>> > It failed when I started any sandbox unit test like:
>> > ./test/py/test.py --bd sandbox --build -k <any_test>
>> > My local host: Ubuntu v20.04, x86_64
>>
>> We don't see that normally, is there something odd about your compilers?
>> This is the kind of thing which should be failing everywhere, but isn't.
>> Thanks.
>>
> This failure occured in my host since v2025.07-rc1, but with the same
> host, same setup and same instructions it worked fine in v2025.04-rc5.
> Seems that some impacts were introduced during v2025.04-rc5 ~
> v2025.07-rc1, which might be worth investigating.
>

I am unable to reproduce the issue on gcc 15.1.1 and glibc 2.41. I think
the issue is likely on your host end.  What compiler and libc are you
using for the build?

Regards,
Anshul