how to use PETSC with C++

[Barry Smith]

  Please download and install PETSc 2.3.1 (just released).
Regardless of whether you run with --with-clanguage=c++ or
not, what you want to do SHOULD work!

  If the problem persists with 2.3.1 please send configure.log
make_log*** and the output from linking your example to
petsc-maint at mcs.anl.gov so we
can determine what has gone wrong.

   Barry


On Tue, 7 Feb 2006, Tomasz Jankowski wrote:

> hello group
>
> I know that no-one like newbie questions, but... unfortunetly I have one
>
> Sorry but I cant find in google or manual the clear example how to use
> PETSC from C++.
> If there are such, please just point me to them.
>
>
> Initaially I have started with
> ./config/configure.py --download-f-blas-lapack=1
>
> I have sucessfully compiled a few examples and run in parallel mode.
> Now I want to implement PETSC for solwing my linear models.
> I need to switch to C++ because whole code for data manipulation
> (reading,renumbering) and model manipulation (representation, building) I
> have written in C++.
>
> Maybe it is strange that I'm writing c/c++ code and have such problems but
> (i'm geneticst not informaticst) compiling and linking ,static and shared
> libs building it is just night mare for me.
>
> So,
>
> I have configured PETSC with such options
> Configure Options: --with-clanguage=C++ --download-f-blas-lapack=1
> --with-shared=0 -configModules=PETSc.Configure
>
> and can't compile even such code
> -------------------------------------------
> #include <string>
> #include "petscksp.h"
>
> #undef __FUNCT__
> #define __FUNCT__ "main"
> int main(int argc,char **args)
> {
>    PetscErrorCode ierr;
>    PetscInitialize(argc,args,PETSC_NULL,PETSC_NULL);
>    ierr = PetscFinalize();
>    CHKERRQ(ierr);
>    return 0;
> }
> ----------------------------------------
>
>
> When I try to compile it I obtain this:
>
> mpiCC -c -Wall -g3 -I/home/work/petsc-2.3.0
> -I/home/work/petsc-2.3.0/bmake/linux-gnu -I/home/work/petsc-2.3.0/include
> -I/usr/local/include -D__SDIR__="/home/work/blup_pcg" ex4.C
> mpiCC -Wall -g3  -o ex4 ex4.o
> -Wl,-rpath,/home/work/petsc-2.3.0/lib/linux-gnu
> -L/home/work/petsc-2.3.0/lib/linux-gnu -lpetscksp -lpetscdm -lpetscmat
> -lpetscvec -lpetsc    -lnsl -lrt
> -Wl,-rpath,/home/work/petsc-2.3.0/externalpackages/fblaslapack/linux-gnu
> -L/home/work/petsc-2.3.0/externalpackages/fblaslapack/linux-gnu-lflapack
> -Wl,-rpath,/home/work/petsc-2.3.0/externalpackages/fblaslapack/linux-gnu
> -L/home/work/petsc-2.3.0/externalpackages/fblaslapack/linux-gnu -lfblas
> -lm -L/usr/local/lib -llammpio -llamf77mpi -lmpi -llam -lutil -ldl -lg2c
> -lm -L/usr/lib/gcc-lib/i486-linux/3.3.5
> -L/usr/lib/gcc-lib/i486-linux/3.3.5/../../.. -lm -lgcc_s -lpthread
> -L/usr/local/lib -L/usr/lib/gcc-lib/i486-linux/3.3.5
> -L/usr/lib/gcc-lib/i486-linux/3.3.5/../../.. -llammpio -llammpi++
> -llamf77mpi -lmpi -llam -lutil -ldl -lstdc++ -lgcc_s -lpthread
> ex4.o(.text+0x2e): In function `main':
> /usr/local/include/mpi2cxx/datatype_inln.h:174: undefined reference to
> `PetscInitialize(int*, char***, char const*, char const*)'
> ex4.o(.text+0x33):/usr/local/include/mpi2cxx/datatype_inln.h:213:
> undefined reference to `PetscFinalize()'
> collect2: ld returned 1 exit status
> mpiCC: No such file or directory
> make: [ex4] B³±d 1 (zignorowany)
>
>
> ########################################################
> #               tomjan at jay.au.poznan.pl                #
> #              jay.au.poznan.pl/~tomjan/               #
> ########################################################