[petsc-dev] (arm64) could not find object file symbol for symbol ___muldc3

[Barry Smith]

  Blaise,

  Please send configure.log 

  It would also be helpful if you could run 

  nm -o /usr/lib/lib* | grep muldc3 

  Our cross language linker tests are not adding all the libraries they need to add when using Fortran for linking.

  Barry



> On Apr 6, 2021, at 11:00 AM, Matthew Knepley <knepley at gmail.com> wrote:
> 
> On Tue, Apr 6, 2021 at 11:04 AM Blaise A Bourdin <bourdin at lsu.edu <mailto:bourdin at lsu.edu>> wrote:
> Hi,
> 
> I am having the following warning when compiling any fortran example (currently on main, but  it’s been going on for a little while) on a ARM mac.
> 
> 
> *******************Error detected during compile or link!*******************
> See http://www.mcs.anl.gov/petsc/documentation/faq.html <http://www.mcs.anl.gov/petsc/documentation/faq.html>
> /opt/HPC/petsc-main/src/snes/tutorials ex5f
> *********************************************************
> mpif90 -Wl,-bind_at_load -Wl,-multiply_defined,suppress -Wl,-multiply_defined -Wl,suppress -Wl,-commons,use_dylibs -Wl,-search_paths_first -Wl,-no_compact_unwind -ffree-line-length-none -fallow-argument-mismatch -fPIC -g   -ffree-line-length-none -fallow-argument-mismatch -fPIC -g    -I/opt/HPC/petsc-main/include -I/opt/HPC/petsc-main/bigsur-gcc10.2-arm64-reallybasic-g/include -I/opt/X11/include     ex5f.F90  -Wl,-rpath,/opt/HPC/petsc-main/bigsur-gcc10.2-arm64-reallybasic-g/lib -L/opt/HPC/petsc-main/bigsur-gcc10.2-arm64-reallybasic-g/lib -Wl,-rpath,/opt/X11/lib -L/opt/X11/lib -Wl,-rpath,/opt/homebrew/Cellar/mpich/3.4.1_2/lib -L/opt/homebrew/Cellar/mpich/3.4.1_2/lib -Wl,-rpath,/opt/homebrew/Cellar/gcc/10.2.0_4/lib/gcc/10/gcc/aarch64-apple-darwin20/10.2.1 -L/opt/homebrew/Cellar/gcc/10.2.0_4/lib/gcc/10/gcc/aarch64-apple-darwin20/10.2.1 -Wl,-rpath,/opt/homebrew/Cellar/gcc/10.2.0_4/lib/gcc/10 -L/opt/homebrew/Cellar/gcc/10.2.0_4/lib/gcc/10 -lpetsc -llapack -lblas -lX11 -lc++ -ldl -lmpifort -lmpi -lpmpi -lgfortran -lemutls_w -lm -lc++ -ldl -o ex5f
> warning: (arm64)  could not find object file symbol for symbol muldc3
> Fortran example src/snes/tutorials/ex5f run successfully with 1 MPI process
> 
> 
> For reference, here is how I configured petsc:
> ./configure     --CFLAGS='-Wimplicit-function-declaration'    --FFLAGS="-ffree-line-length-none -fallow-argument-mismatch"            --with-debugging=1                    --with-shared-libraries=1             --with-x11=1
> 
> It looks like this symbol is referenced in: sfpack.o
> 
> SiMini:petsc-main (main)$ grep -ri muldc3 bigsur-gcc10.2-arm64-reallybasic-g/*
> Binary file bigsur-gcc10.2-arm64-reallybasic-g/lib/libpetsc.3.015.0.dylib matches
> Binary file bigsur-gcc10.2-arm64-reallybasic-g/lib/libpetsc.3.015.dylib matches
> bigsur-gcc10.2-arm64-reallybasic-g/lib/petsc/conf/check.log:warning: (arm64)  could not find object file symbol for symbol ___muldc3
> Binary file bigsur-gcc10.2-arm64-reallybasic-g/lib/libpetsc.dylib matches
> Binary file bigsur-gcc10.2-arm64-reallybasic-g/obj/vec/is/sf/impls/basic/sfpack.o matches
> 
> SiMini:petsc-main (main)$ nm bigsur-gcc10.2-arm64-reallybasic-g/obj/vec/is/sf/impls/basic/sfpack.o | grep muldc3
>                  U ___muldc3
> 
> Google tells me it is a gcc thing for complex multiplication. Ah, I think this is the problem:
> 
>   https://lists.mcs.anl.gov/pipermail/mpich-discuss/2012-August/012920.html <https://lists.mcs.anl.gov/pipermail/mpich-discuss/2012-August/012920.html>
> 
> It is in the C library and you are linking from Fortran, so the compatibility libraries are not correct.
> 
>   Thanks,
> 
>     Matt
>  
> Any idea?
> Blaise
> 
> 
> -- 
> A.K. & Shirley Barton Professor of  Mathematics
> Adjunct Professor of Mechanical Engineering
> Adjunct of the Center for Computation & Technology
> Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803, USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276 Web http://www.math.lsu.edu/~bourdin <http://www.math.lsu.edu/~bourdin>
> 
> 
> -- 
> 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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