View source for Installation/Linux/OpenFOAM-7/Ubuntu/18.04

For other versions of Ubuntu and other installation instructions, please visit the parent page: [[../]]

A few notes before you start copy-pasting:

# Lines that start with <tt>#</tt> don't have to be ''copy-pasted''. They are just comments to let you know what's going on.
# One wrong character is enough for breaking this guide, so make sure you can read the characters properly or that the installed language system does not break the copied characters!


= Ubuntu 18.04 =

'''Discussion thread where you can ask questions about these steps''': {{Installation/NoThreadAskForum}}

Steps:
<ol>
{{Installation/Linux/SwitchToRoot}}
{{Installation/Linux/AptGetUpdate}}
<li>Install the necessary packages:
<bash>apt-get install git-core build-essential cmake libfl-dev bison zlib1g-dev qttools5-dev qtbase5-dev libqt5x11extras5-dev gnuplot \
libreadline-dev libncurses-dev libxt-dev libopenmpi-dev openmpi-bin libboost-system-dev libboost-thread-dev libgmp-dev \
libmpfr-dev python python-dev libcgal-dev curl
</bash>
'''Note''': It has been reported that the following should also be executed in some cases, so that ParaView and CGAL will build properly:
<bash>apt-get install libglu1-mesa-dev</bash>
</li>

{{Installation/Linux/ExitRoot}}

<li>Download and unpack (here you can copy-paste all in single go):
<bash>#OpenFOAM downloading and installation
cd ~
mkdir OpenFOAM
cd OpenFOAM
git clone https://github.com/OpenFOAM/OpenFOAM-7.git
git clone https://github.com/OpenFOAM/ThirdParty-7.git
</bash>
</li>

<li>'''Optional''': Let's make a few symbolic links that should ensure that the correct global MPI installation is used by this OpenFOAM installation:
<bash>ln -s /usr/bin/mpicc.openmpi OpenFOAM-7/bin/mpicc
ln -s /usr/bin/mpirun.openmpi OpenFOAM-7/bin/mpirun</bash>
This way we avoid having problems in case there is more than one MPI toolbox installed in your Ubuntu system, for example if MPICH2 is installed and is the default MPI toolbox.
</li>

<li>For building OpenFOAM itself, it depends on whether you have installed the i686 or x86_64 architecture of Ubuntu. To check this, run:
<bash>uname -m</bash>
Now, accordingly:
<ul {{NoIndentStyle}}>
<li>For '''i686''':
<bash>source $HOME/OpenFOAM/OpenFOAM-7/etc/bashrc WM_ARCH_OPTION=32 FOAMY_HEX_MESH=yes
</bash></li>

<li>For '''x86_64''', it depends on whether you need 64-bit integer support or not:
<ul {{NoIndentStyle}}>
<li>For building with the normal 32-bit integer support (maximum 2.147×10<sup>9</sup> cells, faces or points):
<bash>source $HOME/OpenFOAM/OpenFOAM-7/etc/bashrc FOAMY_HEX_MESH=yes
</bash>
</li>
<li>For building with the normal 64-bit integer support (maximum 9.22×10<sup>18</sup> cells, faces or points):
<bash>source $HOME/OpenFOAM/OpenFOAM-7/etc/bashrc WM_LABEL_SIZE=64 FOAMY_HEX_MESH=yes
</bash>
</li>
</ul>
</li>
</ul>
</li>

<li>Save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of7='source \$HOME/OpenFOAM/OpenFOAM-7/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM-7|of7}}
</li>

<li>In order to build ParaView 5.6.0, including with the ability to use Python and MPI, several steps are needed:
<ol>
<li>Make sure you're running in the {{tt|ThirdParty}} folder and that the correct Qt version is used:
<bash>cd $WM_THIRD_PARTY_DIR
export QT_SELECT=qt5
 </bash>
</li>
<li>For building ParaView with Python and MPI, it depends on whether you have installed the i686 or x86_64 architecture of Ubuntu. To check this, run:
<bash>uname -m</bash>
Now, accordingly:
<ul {{NoIndentStyle}}>
<li>For '''i686''':
<bash>#this will take a while... somewhere between 30 minutes to 2 hours or more
./makeParaView -python -mpi -python-lib /usr/lib/i386-linux-gnu/libpython2.7.so.1.0 > log.makePV 2>&1</bash>
</li>

<li>For '''x86_64''':
<bash>#this will take a while... somewhere between 30 minutes to 2 hours or more
./makeParaView -python -mpi -python-lib /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 > log.makePV 2>&1</bash>
</li>
</ul>
</li>
<li>{{Installation/ParaView/BuildProblemsCheckFAQ|makeParaView|log.makePV}}
</li>
<li>Finally, update the shell environment:
<bash>wmRefresh</bash>
</li>
</ol>
</li>

<li>Now let's build OpenFOAM:
<ol>
<li>Go into OpenFOAM's main source folder and be certain that the correct Qt version is being used:
<bash>cd $WM_PROJECT_DIR
export QT_SELECT=qt5</bash>
</li>

<li>This next command will take a while... somewhere between 30 minutes to 3-6 hours:
<bash>./Allwmake -j 4 > log.make 2>&1</bash>
{{Installation/Linux/NumberOfCores}}
</li>
<li>Run it a second time for getting a summary of the installation:
<bash>./Allwmake -j 4 > log.make 2>&1</bash>
'''Note:''' Technically, the build will stop as soon as the first error is found. Running a second time only makes it easier to sort through between what's already been built and where the crash occurred.
</li>
</ol>
</li>

<li>{{Installation/Linux/CheckIfAllWentWell}}</li>

<li>{{Installation/ReadUserGuideEtAl_OpenFOAMFoundation}}</li>

<li>When you need to update your local ''clone'', for getting the latest source code updates, you can follow the instructions provided in the page [[Installation/Working with git repositories]].</li>

<li>'''Note''': When you want to update your build, follow the instructions on section [[Installation/Linux/OpenFOAM-7#Steps for updating|Steps for updating]] on the parent page.</li>
</ol>


{{Installation/Linux/AliasReminder|OpenFOAM-7|of7}}


'''Discussion thread where you can ask questions about these steps''': {{Installation/NoThreadAskForum}}

<br>
== Compiling the On-Screen Mesa drivers for ParaView ==

On virtual machines or when using older graphics cards and/or drivers, it's not possible to use ParaView 5.6 because it needs OpenGL2 support with version 3.3 or newer. Therefore, a workaround, is to build and deploy On-Screen Mesa drivers, for which we provide instructions here: [[Installation/On-Screen_Mesa/Ubuntu#Ubuntu_18.04]]


[[Category:Installing OpenFOAM on Linux]] [[Category:Installing OpenFOAM on Ubuntu]]