[petsc-users] petsc under cygwin

[Smith, Barry F.]

  Ok, run configure with --with-cxx=0 and without --with-clanguage=c++ but note that certain external packages such as SuperLU_DIST require C++.

> On Dec 5, 2019, at 11:39 PM, Povolotskyi, Mykhailo <mpovolot at purdue.edu> wrote:
> 
> 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 <mpovolot at purdue.edu> 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>