[petsc-users] Makefile problems: environmental variables, includes paths and libraries.

[Matthew Agius]

Thanks for your help
Now I have this error:

*Error: Symbol 'petsc_null_character' at (1) has no IMPLICIT type*

Any idea on this one?


petscinv.F90:147.56:
>             call PetscOptionsGetInt(PETSC_NULL_CHARACTER,&
>                                                         1
> Error: Symbol 'petsc_null_character' at (1) has no IMPLICIT type
> petscinv.F90:227.12:
>         use module_options
>             1
> Fatal Error: Can't open module file 'module_options.mod' for reading at
> (1): No such file or directory
> make: [petscinv] Error 1 (ignored)



Many many thanks dear PETSc users !
Matthew


On Tue, 15 Oct 2019 at 18:42, Balay, Satish <balay at mcs.anl.gov> wrote:

> On Tue, 15 Oct 2019, Matthew Agius via petsc-users wrote:
>
> > Dear PETSC users,
> >
> > This is my first attempt at PETSC package.
> >
> > First step, I think I have installed PETSC, well at least no errors.
> > Now I am trying to run a simple makefile as suggested in the manual
> > I am confused about undeclared variables in the example makefiles that I
> am
> > coming across; variables such as:
> >
> > > ${CLINKER}   ${PETSC_LIB}   ${PETSC_SYS_LIB}   ${PETSC_VEC_LI B}
> > > ${PETSC_MAT_LIB}   ${PETSC_DM_LIB}   ${PETSC_KSP_LIB}
>  ${PETSC_SNES_LIB}
> > > or ${PETSC_TS_LIB}.
> >
> > Are these environmental variables?
>
> nope - they are declared in other makefiles - and picked up with:
>
> include ${PETSC_DIR}/lib/petsc/conf/variables
> include ${PETSC_DIR}/lib/petsc/conf/rules
>
>
> > So far I only have PETSC_DIR declared in my environment.
> > Do I have to declare each one? What are they?
> >
> > The error I am actually getting is
> >
> > > error #6404: This name does not have a type, and must have an explicit
> > > type.   [PETSC_NULL_CHARACTER]
> >
> > This is probably due to a missing Include library file in the
> compilation.
> > Any hint which one it is?
>
> Presumably this is not a petsc example with petsc makefile.
>
> Please compare the output of compiling your code/makefile - with a petsc
> example/makefile and check for differences.
>
> i.e
> cd src/ksp/ksp/examples/tutorials
> make ex2
>
> Satish
>
>
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