[petsc-users] About Configuring PETSc

[Smith, Barry F.]

  You do not have an installation of PETSc at the directory location /home/maahi/petsc/arch-opt/

  Perhaps you did not run ./configure  and make with the PETSC_ARCH value set to arch-opt or perhaps the ./configure failed. 

   Barry



> On Mar 22, 2019, at 2:07 PM, Maahi Talukder via petsc-users <petsc-users at mcs.anl.gov> 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
> > > >
> > >
> > >
> > 
>