[petsc-users] Exhausted all shared linker guesses. Could not determine how to create a shared library!

[Matthew Knepley]

On Mon, Mar 8, 2021 at 8:23 PM Fande Kong <fdkong.jd at gmail.com> wrote:

> Thanks Matthew,
>
> Hmm, we still have the same issue after shutting off all unknown flags.
>

Oh, I was misinterpreting the error message:

  ld: can't link with a main executable file
'/var/folders/tv/ljnkj46x3nq45cp9tbkc000c0000gn/T/petsc-6v1w4q4u/config.setCompilers/libconftest.dylib'

So clang did not _actually_ make a shared library, it made an executable.
Did clang-11 change the options it uses to build a shared library?

Satish, do we test with clang-11?

  Thanks,

      Matt

Thanks,
>
> Fande
>
> On Mon, Mar 8, 2021 at 6:07 PM Matthew Knepley <knepley at gmail.com> wrote:
>
>> On Mon, Mar 8, 2021 at 7:55 PM Fande Kong <fdkong.jd at gmail.com> wrote:
>>
>>> Hi All,
>>>
>>> mpicc rejected "-fPIC". Anyone has a clue how to work around this issue?
>>>
>>
>> The failure is at the last step
>>
>> Executing: mpicc  -o
>> /var/folders/tv/ljnkj46x3nq45cp9tbkc000c0000gn/T/petsc-6v1w4q4u/config.setCompilers/conftest
>>   -fPIC
>> /var/folders/tv/ljnkj46x3nq45cp9tbkc000c0000gn/T/petsc-6v1w4q4u/config.setCompilers/conftest.o
>> -L/var/folders/tv/ljnkj46x3nq45cp9tbkc000c0000gn/T/petsc-6v1w4q4u/config.setCompilers
>> -lconftest
>>
>> Possible ERROR while running linker: exit code 1
>>
>> stderr:
>>
>> ld: can't link with a main executable file
>> '/var/folders/tv/ljnkj46x3nq45cp9tbkc000c0000gn/T/petsc-6v1w4q4u/config.setCompilers/libconftest.dylib'
>> for architecture x86_64
>>
>> clang-11: error: linker command failed with exit code 1 (use -v to see
>> invocation)
>>
>> but you have some flags stuck in which may or may not affect this. I
>> would try shutting them off:
>>
>> LDFLAGS_LD=-pie -headerpad_max_install_names -dead_strip_dylibs -rpath
>> /Users/kongf/miniconda3/envs/moose/lib
>> -L/Users/kongf/miniconda3/envs/moose/lib
>>
>> I cannot tell exactly why clang is failing because it does not report a
>> specific error.
>>
>>   Thanks,
>>
>>      Matt
>>
>> The log was attached.
>>>
>>> Thanks so much,
>>>
>>> Fande
>>>
>>
>>
>> --
>> What most experimenters take for granted before they begin their
>> experiments is infinitely more interesting than any results to which their
>> experiments lead.
>> -- Norbert Wiener
>>
>> https://www.cse.buffalo.edu/~knepley/
>> <http://www.cse.buffalo.edu/~knepley/>
>>
>

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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