[petsc-users] compile error of CHKERRQ when linking to PETSC

[feng wang]

Dear Satish,
Many thanks for your prompt reply.
Yes, you are right! I've changed the return type of my function to "PetscErrorCode", it is working now. silly me.....
Thanks,
Feng

________________________________
From: Satish Balay <balay at mcs.anl.gov>
Sent: 03 March 2021 18:25
To: feng wang <snailsoar at hotmail.com>
Cc: PETSc <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] compile error of CHKERRQ when linking to PETSC

CHKERRQ() returns error code from the routine. However if the routine is set to return void - use CHKERRABORT()

CHKERRABORT(PETSC_COMM_WORLD,ierr)

Satish

On Wed, 3 Mar 2021, feng wang wrote:

> Dear All,
>
> I am new to PETSC and have exercised on a few simple programs to get myself familiar with PETSC and the simple codes work properly. So the environment for PETSC is set up with no problem. Now I am trying to do some work in my big code which is written in C++.  Somehow, I get the compile error for  "CHKERRQ", and the error message is:
>
> ~/cfd/petsc/include/petscerror.h:464:196: error: return-statement with a value, in function returning 'void' [-fpermissive]
>        do {PetscErrorCode ierr__ = (ierr); if (PetscUnlikely(ierr__)) return PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,ierr__,PETSC_ERROR_REPEAT," ");} while (0)
>                                                                                                                                                                            ^
> domain/cfd/petsc_nk.cpp:23:7: note: in expansion of macro ‘CHKERRQ’
>        CHKERRQ(ierr);
>
> Basically, it complains about "CHKERRQ", if I remove "CHKERRQ", the code compiles with no problem. Could someone please shine some light on this?
>
> Many thanks,
> Feng
>
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