[petsc-users] CMake error in PETSc

[Matthew Knepley]

It sounds like your C++ compiler is name mangling the symbol, but the
library has no mangling.
Why are you using C++.

  Thanks,

    Matt

On Fri, Dec 6, 2019 at 10:44 AM Yingjie Wu <yjwu16 at gmail.com> wrote:

> Hi,
> Thank you for your email.
>
> The error in the previous program was indeed due to the missing
> "SNESSetFromOptions".
> I use the /snes/example/tutorial/ex1.cpp as test case. However, I found
> that some of the statements in the program were not compiled and deleted
> the statements containing "MPI_Comm_size", but I don't know how to solve
> this problem.
>
> lerui at yu1994-ThinkPad-W520:~/tem2/build2$ cmake ..
> -- The C compiler identification is GNU 5.4.0
> -- The CXX compiler identification is GNU 5.4.0
> -- Check for working C compiler: /usr/bin/cc
> -- Check for working C compiler: /usr/bin/cc -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Detecting C compile features
> -- Detecting C compile features - done
> -- Check for working CXX compiler: /usr/bin/c++
> -- Check for working CXX compiler: /usr/bin/c++ -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Detecting CXX compile features
> -- Detecting CXX compile features - done
> -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
> -- Checking for one of the modules 'PETSc'
> pkg include dirs:
> /home/lerui/petsc-3.12.2/arch-linux2-c-debug/include;/home/lerui/petsc-3.12.2/include
> pkg include libs: petsc
> pkg ldflags: -L/home/lerui/petsc-3.12.2/arch-linux2-c-debug/lib;-lpetsc
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /home/lerui/tem2/build2
> lerui at yu1994-ThinkPad-W520:~/tem2/build2$ make
> Scanning dependencies of target main
> [ 50%] Building CXX object CMakeFiles/main.dir/ex1.cpp.o
> [100%] Linking CXX executable main
> /usr/bin/ld: CMakeFiles/main.dir/ex1.cpp.o: undefined reference to symbol
> 'MPI_Comm_size'
> /home/lerui/petsc-3.12.2/arch-linux2-c-debug/lib/libmpi.so.12: error
> adding symbols: DSO missing from command line
> collect2: error: ld returned 1 exit status
> CMakeFiles/main.dir/build.make:94: recipe for target 'main' failed
> make[2]: *** [main] Error 1
> CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/main.dir/all' failed
> make[1]: *** [CMakeFiles/main.dir/all] Error 2
> Makefile:83: recipe for target 'all' failed
> make: *** [all] Error 2
>
> Thanks,
> Yingjie
>
> Jed Brown <jed at jedbrown.org> 于2019年12月6日周五 上午10:54写道：
>
>> Yingjie Wu <yjwu16 at gmail.com> writes:
>>
>> > I'm so sorry that I've ignored your previous advices.
>> >
>> > I added a global variable that seems works:
>> >
>> >
>> > export
>> >
>> LD_LIBRARY_PATH=/home/lerui/petcs-3.12.2/arch-linux2-c-debug/lib:$LD_LIBRARY_PATH
>> >
>> >
>> > How should I make petsc in a standard position?This eliminates the need
>> to
>> > set global variables.
>>
>> You can configure PETSc with --prefix=/your/standard/path, then make
>> install.
>>
>> > It seems that some of the options before running fit become unavailable:
>> >
>> >
>> > mpiexec -n 1 ./example01cmke -snes_view
>> >
>> >
>> > Options-snes _ view are not used and how should I solve this problem?
>>
>> I don't have your ex1.cpp, but presumably you didn't SNESSetFromOptions?
>>
>

-- 
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/>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20191206/90471030/attachment.html>