[petsc-users] Putting petsc in a namespace

[Florian Lindner]

Hello,

This may be rather a C/C++ question, but ...

I encapsulate some petsc functions into c++ classes. Since I don't want 
to pull all petsc symbols into the global namespace for anyone using my 
classes I try to put petsc into it's own namespace:

Header petsc.h:

namespace petsc {
#include "petscmat.h"
}

class Vector {
   petsc::Vec vector;
}


Implementation petsc.cpp:

#include "petsc.h"

namespace petsc {
#include "petscviewer.h"
}

using namespace petsc;


User:

#include "petsc.h"
#include <petscksp.h>  // if the user wants he can import parts of petsc 
of course


But this gives a massive amount of error messsages like:

mpic++ -o petsc.o -c -O0 -g3 -Wall 
-I/home/florian/software/petsc/include 
-I/home/florian/software/petsc/arch-linux2-c-debug/include petsc.cpp
mpic++ -o prbf.o -c -O0 -g3 -Wall -I/home/florian/software/petsc/include 
-I/home/florian/software/petsc/arch-linux2-c-debug/include prbf.cpp
In file included from 
/home/florian/software/petsc/include/petscksp.h:6:0,
                  from prbf.cpp:9:
/home/florian/software/petsc/include/petscpc.h:9:14: error: 
'PetscErrorCode' does not name a type
  PETSC_EXTERN PetscErrorCode PCInitializePackage(void);


Is there a way to achieve what I want?

Thanks,
Florian