[petsc-dev] user makefile

[Matthew Knepley]

foo: foo .o
      ${CLINKER} -o $@ $^ ${PETSC_LIB}

   Matt

On Thu, Jan 13, 2022 at 9:54 PM Jacob Faibussowitsch <jacob.fai at gmail.com>
wrote:

> Is share/petsc/Makefile.user what you are looking for?
>
> Best regards,
>
> Jacob Faibussowitsch
> (Jacob Fai - booss - oh - vitch)
>
> On Jan 13, 2022, at 21:49, Barry Smith <bsmith at petsc.dev> wrote:
>
>
>
> https://petsc.org/release/docs/manual/getting_started/?highlight=user%20makefile
>
> Search for Writing Application Codes with PETSc
>
> Perhaps this needs to clearer or have links to it from the FAQ.
>
>
>
> On Jan 13, 2022, at 9:38 PM, Mark Adams <mfadams at lbl.gov> wrote:
>
> I am finding it pretty hard to find an example of a makefile target to
> build an app with PETSc.
>
> I can not find it on the docs page.
>
> With Google:
>
> Victor has a little example that looks fine ($PETSC_LIB). (sort of, see
> below)
>
> Another one is bigger and has this at the end:
>
>     -${CLINKER} $< -o bin.x $(OBJ_FILES) ${PETSC_KSP_LIB}
> -I$(PETSC_DIR)/include
>
> I recall using PETSC_KSP_LIB the last time I wrote a makefile 20 years ago.
>
> Maybe there should be a FAQ that a search would find like "Example of user
> makefile" with something like Victor's (dropping v2 and updating it, this
> looks wrong):
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> *PETSc linkingThe easiest way to link PETSc to your code is to have this
> line in your makefile:include ${PETSC_DIR}/conf/baseThis will automatically
> give you the compilation rules. For linking you then do:${CLINKER} -o ex1
> ex1.o ${PETSC_LIB}(or FLINKER for fortran)You can also use this include
> line:include ${PETSC_DIR}/conf/variablesand then you have to give the
> compile rules yourself. In this case, dosomething like${CC} -c ex1.c
> ${PETSC_INCLUDE}to compile. (This is for petsc version 3, for version 2
> useinclude ${PETSC_DIR}/bmake/common/baseand replace base by variables to
> omit petsc’s make rules.)If you insist on having all the libraries and
> includes explicitly, usemake getlinklibsmake getincludedirs*
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-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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