[petsc-users] PETSc with gcc/gfortran

[Barry Smith]

  This happens when the module files were created with one Fortran compiler, say ifort`, but it is attempting to read them with a different Fortran compiler, say gfortran. (You can never mix to different Fortran compilers in the same executable/library/module system.

  You need to use a different PETSC_ARCH and configure PETSc with --with-fc=gfortran to use the gfortran compiler

  Barry


> On Sep 6, 2022, at 11:59 AM, Han Tran <tranduchan at gmail.com> wrote:
> 
> I used to compile my Fortran 90 code using intel compilers (i.e. intel and impi). However, when I tried to compile using gcc, it gave the following error.
> 
>   use petscksp
>       1
> Fatal Error: File 'petscksp.mod' opened at (1) is not a GNU Fortran module file
> 
> It would be appreciated if you could give any hints on this issue. Thank you so much!
> 
> -Han

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