CMake doesn't recognize PETSc

[Josué Barroso]

I'm trying to install deal.II on my machine following the installation instructions but when I run the cmake command it doesn't recognize the PETSc library

Since I'm working on Ubuntu 14.04 (Trusty), I install PETSc through the package petsc-dev (3.4.2.dfsg1-6) (http://packages.ubuntu.com/trusty/petsc-dev)

The detailed log is attached.

I'd appreciate any help.

Thanks in advance

[Chad Balen]

Hi Josué,

From the looks of your log file it's not finding your PETSc build. Try adding the following in terminal when running cmake for deal.II:

$cmake \
$-DDEAL_II_WITH_PETSC=ON \
$-DPETSC_DIR=Path/to/PETSc/dir \
$-DPETSC_ARCH=arch-linux2-c-debug

By using -DDEAL_II_WITH_PETSC=ON it will force deal.ii to use PETSc and if it can't find PETSc it should stop the installation.

Since it couldn't find it, you will also need to give deal.ii a hint of where PETSc is located by using -DPETSC_DIR.

Also you will most likely have to specify a value for -DPETSC_ARCH, I have only installed PETSc from source so PETSc tells me what the architecture is during this. On OpenSUSE (it seems to be either arch-linux2-c-debug for debug mode or arch-linux2-c-opt for optimized mode).

TIP: you may have to do a clean build of deal.ii when changing -DPETSC_ARCH. If I switch between PETSc debug and optimized mode deal.ii doesn't always recognize I changed this value and gives me errors.

Hope that helps,
Chad

[Josué Barroso]

After trying to build with only the option -DDEAL_II_WITH_PETSC=ON  I've got an error message:

 PETSc has to be configured with the same MPI configuration as deal.II, but

  found:

    DEAL_II_WITH_MPI = OFF

    PETSC_WITH_MPI   = (NOT FALSE)

So I change the parameter of the cmake to include the MPI library:

cmake -DCMAKE_INSTALL_PREFIX=~/bin/deal.II -DDEAL_II_COMPONENT_PARAMETER_GUI=ON -DDEAL_II_WITH_MPI=ON ..

And it worked! It found the MPI, PETSc and SLEPc libraries automatically 

Thank you very much for your help!

--

Josué dos Santos Barroso

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[Matthias Maier]

Am 08. Jul 2014, 05:45 schrieb Josué Barroso <josue.s...@gmail.com>:

> After trying to build with only the option -DDEAL_II_WITH_PETSC=ON
>  I've got an error message:
>
>  PETSc has to be configured with the same MPI configuration as
> deal.II, but
>   found:
>
>     DEAL_II_WITH_MPI = OFF
>     PETSC_WITH_MPI   = (NOT FALSE)

Well, you also want to enable MPI support by setting

-DDEAL_II_WITH_MPI=ON

Best,
Matthias

[Uwe Köcher]

Josue,

you could try my installer for deal.II. Today, I've updated the ubuntu14 platform support.

Do the following:

$ sudo apt-get install git

$ git clone https://github.com/koecheru/candi

$ cd candi

$ ./candi.sh

Abort the installer (or open a new terminal), and do the given install notes from the comment.

It installs also the openmpi compiler from ubuntu.

Afterwards you can let the installer run (if you have multiple cores in your system, you could

speed up the build process by setting the variable PROCS in local.cfg to an appropriate size)

On a freshly installed virtual machine (ubuntu 14.04) it runs without any error. If you encounter

any problem, please let me know.

Best,

  Uwe

[Uwe Köcher]

Sorry, the link is correctly: https://github.com/koecher/candi

[Josué Barroso]

Thanks Uwe for the alternative but as I said before, the option -DDEAL_II_WITH_MPI=ON was enough
If someday I need to install deal.II again I'll try that!

Best,

Josué