[petsc-users] About Configuring PETSc

[Balay, Satish]

Did you build PETSc with PETSC_ARCH=arch-opt?

Btw - I used PETSC_ARCH=arch-debug to illustrate - but you already
have a build with PETSC_ARCH=arch-linux2-c-debug - so you should stick
to that.

Satish

On Fri, 22 Mar 2019, Maahi Talukder via petsc-users wrote:

> Hi,
> 
> I tried to run the command 'make PETSC_ARCH=arch-opt wholetest1' but it
> shows me the following error-
> 
> ..................................................................................................................................................
> [maahi at CB272PP-THINK1 Desktop]$ make PETSC_ARCH=arch-opt wholetest1
> /home/maahi/petsc/lib/petsc/conf/rules:960:
> */home/maahi/petsc/arch-opt/lib/petsc/conf/petscrules:
> No such file or directory*
> make: *** No rule to make target
> '/home/maahi/petsc/arch-opt/lib/petsc/conf/petscrules'.  Stop.
> ........................................................................................................................................................
> 
> My .bashrc is the following -
> 
> .....................................................................
> 
> PATH=$PATH:$HOME/.local/bin:$HOME/bin:/usr/lib64/openmpi/bin
> 
> export PATH
> 
> export PETSC_DIR=$HOME/petsc
> export PETSC_ARCH=arch-linux2-c-debug
> #export PETSC_ARCH=arch-debug
> 
> ..........................................................................................
> 
> Could you please tell me what went wrong?
> 
> Regards,
> Maahi Talukder
> 
> 
> On Thu, Mar 21, 2019 at 11:55 PM Maahi Talukder <maahi.buet at gmail.com>
> wrote:
> 
> > Thank you so much for your reply. That clear things up!
> >
> > On Thu, Mar 21, 2019 at 10:43 PM Balay, Satish <balay at mcs.anl.gov> wrote:
> >
> >> On Thu, 21 Mar 2019, Maahi Talukder via petsc-users wrote:
> >>
> >> > 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 ?
> >>
> >> You can specify PETSC_ARCH as an option to make. You can have a default
> >> value set in .bashrc - and change to a different value on command line.
> >>
> >> For ex: in .bashrc
> >>
> >> export PETSC_ARCH=arch-debug
> >>
> >> Now if you want to build with debug libraries:
> >>
> >> make wholetest1
> >>
> >> Now If you want to build with optimized libraries:
> >>
> >> make PETSC_ARCH=arch-opt wholetest1
> >>
> >>
> >> >  And by PETSC_ARCH=arch-opt, do you mean the
> >> > non-debugging mode?
> >>
> >> Yes. You can use whatever name you think is appropriate here.
> >>
> >> ./configure PETSC_ARCH=a-name-i-can-easily-associate-with-this-build
> >> [other configure options.]
> >>
> >> >
> >> > 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
> >>
> >> Hm - you shouldn't be needing these options here. You should switch your
> >> source files from .f to .F and .f90 to .F90 - and remove the above FFLAGS
> >>
> >> Satish
> >>
> >> > 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
> >> > > >
> >> > >
> >> > >
> >> >
> >>
> >>
>