[petsc-users] About Configuring PETSc

[Maahi Talukder]

Thank you for your reply.

So do I need to set the value of PETSC_ARCH as needed in .bashrc  as I did
in case of PETSC_DIR ?  And by PETSC_ARCH=arch-opt, do you mean the
non-debugging mode?

And I am using the following makefile with my code-

CFLAGS =
FFLAGS =-I/home/maahi/petsc/include
-I/home/maahi/petsc/arch-linux2-c-debug/include -cpp -mcmodel=large
CPPFLAGS =
FPPFLAGS =


include ${PETSC_DIR}/lib/petsc/conf/variables
include ${PETSC_DIR}/lib/petsc/conf/rules

wholetest1: wholetest1.o
-${FLINKER} -o wholetest1 wholetest1.o ${PETSC_LIB}
${RM} wholetest1.o

So where do I add that PETSC_ARCH?

Thanks,
Maahi Talukder

On Thu, Mar 21, 2019 at 10:14 PM Balay, Satish <balay at mcs.anl.gov> wrote:

> PETSc uses the concept of PETSC_ARCH to enable multiple in-place
> builds.
>
> So you can have a debug build with PETSC_ARCH=arch-debug, and a
> optimized build with PETSC_ARCH=arch-opt etc.
>
> And if you are using a petsc formatted makefile with your code - you
> can switch between these builds by just switching PETSC_ARCH.
>
> Satish
>
> On Thu, 21 Mar 2019, Maahi Talukder via petsc-users wrote:
>
> > Dear All,
> >
> > Currently, I am running PETSc with debugging option. And it says that if
> I
> > run ./configure --with-debugging=no, the performance would be faster. My
> > question is: what would I do if I want to go back to debugging mode, and
> If
> > I configure it now with no debugging option, would it make any changes to
> > my current setting?
> >
> > Regards,
> > Maahi Talukder
> >
>
>
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