I checked: I cannot build C++ programs with MPI, but I can build and run C programs with MPI.
I have -with-log=0 because there is an overhead if many small objects are created, which is my case. As for the fortran, I will remove --with-fortran=0 On 12/5/2019 11:53 PM, Smith, Barry F. wrote: > Can you actually build and run C++ programs with the MPI? > > Executing: mpicxx -o /tmp/petsc-Llvze6/config.setCompilers/conftest.exe > -fopenmp -fPIC /tmp/petsc-Llvze6/config.setCompilers/conftest.o > Possible ERROR while running linker: exit code 1 > stderr: > /usr/lib/gcc/x86_64-pc-cygwin/7.4.0/../../../../x86_64-pc-cygwin/bin/ld: > cannot find -lmpi_cxx > collect2: error: ld returned 1 exit status > Error testing C++ compiler: Cannot compile/link Cxx with mpicxx. > MPI installation mpicxx is likely incorrect. > Use --with-mpi-dir to indicate an alternate MPI. > > Also you have --with-fortran=0 > > but --download-fblaslapack and FOPTFLAGS=-O3 > > and why do you have --with-log=0 it costs no overhead if you do not use it > and is always useful for tracking performance. > > Barry > > >> On Dec 5, 2019, at 9:19 PM, Povolotskyi, Mykhailo <[email protected]> >> wrote: >> >> Dear Petsc support team, >> >> for some reasons I have to build petsc under Windows. >> >> I have installed Cygwin with GNU compilers and OpenMPI. >> >> Unfortunately, the configuration fails with the following message: >> >> TESTING: checkCxxCompiler from >> config.setCompilers(config/BuildSystem/config/setCompilers.py:814) >> ******************************************************************************* >> UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log >> for details): >> ------------------------------------------------------------------------------- >> C++ compiler you provided with -with-cxx=mpicxx does not work. >> Cannot compile/link Cxx with mpicxx. >> >> I'm attaching the *.log file. >> >> Please advise, >> >> Michael. >> >> <configure.log>
