[petsc-users] calling PETSc from C++

[Francis Poulin]

Hello,

Yes my examples work fine.   I have looked in the makefile for the examples and it looks fairly complicated.  One thing I noticed is that I wasn't  using the mpicc that is in my petsc directory.  I went back and made sure that I am using the mpicc that was build by PETSc.  That changes things, but now I cannot compile the code whereas before I could.

Do you have a suggestion as to how I can most easily adapt the makefile from the examples into the code we are building?

Thanks for the help,
Francis
 
On 2012-03-12, at 4:41 PM, Jed Brown wrote:

> On Mon, Mar 12, 2012 at 15:37, Francis Poulin <fpoulin at uwaterloo.ca> wrote:
> I am trying to call Petsc from a C++ program and having difficulties.  I'm using v3.2.6 and I can run all the examples so I assumed that everything was installed ok.  The body of the function is very simple, see below.  I get a segmentation fault.   In my installation I used mpich
> 
> I have a colleague who also installed openmp and this works for him on the same version of Petsc.  Could it be that Petsc is confused because I have two different MPI's installed?  I am hoping that it will use the one that it configured but I do have the other MPI in the same path.
> 
> Yes, the most likely scenario is that your application was linked with a different MPI than PETSc was compiled with. It is probably a makefile that uses the wrong MPI. Can you build PETSc examples?

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