View source for Installation/Linux/OpenFOAM-3.0.x/CentOS SL RHEL

= Introduction =
This page is dedicated to explaining how to install {{OpenFOAM}} {{version3.0.x}} in:
* Community ENTerprise Operating System, aka '''CentOS'''.
* Red Hat Enterprise Linux, aka '''RHEL'''.
* Scientific Linux, aka '''SL'''.

In '''theory''', all of the above follow the same versioning. Therefore, at the time this page was first written, RHEL, CentOS and SL were all at version {{tt|6.7}}.

Both SL and CentOS derive from RHEL, but [http://centfoam.sourceforge.net/wiki/index.php/Main_Page CentFOAM] is what inspired this (and other related instruction pages). Therefore, before even trying to follow the instructions on this page, try first [http://centfoam.sourceforge.net/wiki/index.php/Main_Page CentFOAM].

Last but not least, RHEL uses Fedora as their bleeding edge Linux Distribution, where they test new features. This leads to very close similarities between them, e.g. RHEL 6.3 is very similar to Fedora 14; which means that whatever you can build on Fedora 14, you should also be able to build on RHEL 6.3!

If you do not yet feel comfortable using Linux, then perhaps you better first read the page [[Installation/Working with the Shell|Working with the Shell]] and train a bit with the shell/terminal environments, so you can have a better perception of the steps shown below.

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= ''Copy-Paste'' steps =

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!

== CentOS 6.7 ==

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

Steps:
<ol>
{{Installation/Linux/SwitchToRoot}}

<li>Install the necessary packages:
<bash>yum groupinstall 'Development Tools' 
yum install openmpi openmpi-devel zlib-devel texinfo gstreamer-plugins-base-devel \
libXext-devel libGLU-devel libXt-devel libXrender-devel libXinerama-devel libpng-devel \
libXrandr-devel libXi-devel libXft-devel libjpeg-turbo-devel libXcursor-devel \
readline-devel ncurses-devel python python-devel

#This one is useful, but not crucial
yum upgrade</bash>
</li>

{{Installation/Linux/ExitRoot}}

<li>Start a new terminal. This is because you'll need a fully refreshed shell.</li>

<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-3.0.x.git
git clone https://github.com/OpenFOAM/ThirdParty-3.0.x.git
</bash>
But we will now have to download a few more of the necessary packages for the {{tt|ThirdParty-3.0.x}} folder:
<ol>
<li>First, we need to prepare for the downloads:
<bash>cd ThirdParty-3.0.x
mkdir download
</bash>
</li>

<li>Now, we need to download the essential source code packages for these instructions you are following (the links are from the file {{tt|README.org}}):
<bash>wget -P download  http://www.paraview.org/files/v4.4/ParaView-v4.4.0-source.tar.gz
wget -P download http://www.cmake.org/files/v3.2/cmake-3.2.1.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
wget -P download https://github.com/CGAL/cgal/releases/download/releases%2FCGAL-4.7/CGAL-4.7.tar.xz
wget -P download http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.bz2
</bash>
'''Note''': If you get the error message "File name too long", then use the alternative download command, e.g.:
<bash>wget -O download/CGAL-4.7.tar.xz https://github.com/CGAL/cgal/releases/download/releases%2FCGAL-4.7/CGAL-4.7.tar.xz</bash>
</li>

<li>Next, we need to unpack the packages we've downloaded:
<bash>tar -xzf download/ParaView-v4.4.0-source.tar.gz
tar -xzf download/cmake-3.2.1.tar.gz
tar -xzf download/scotch_6.0.3.tar.gz
tar -xJf download/CGAL-4.7.tar.xz
tar -xjf download/boost_1_55_0.tar.bz2
</bash>
</li>

<li>And we need to correct some folder names... in this case, it's just ParaView:
<bash>mv ParaView-v4.4.0-source ParaView-4.4.0
</bash>
</li>

<li>Last but not least, the final command on this sub-list is to go back to the main {{tt|OpenFOAM}} folder:
<bash>cd ..
</bash>
</li>
</ol>
</li>

<li>A few details need to be fixed, before proceeding, which will change the default Boost version:
<bash>sed -i -e 's=boost-system=boost_1_55_0=' OpenFOAM-3.0.x/etc/config/CGAL.sh
</bash>
</li>

<li>For building OpenFOAM itself, it depends on whether you have installed the i386 or x86_64 architecture of CentOS/SL/RHEL. To check this, run:
<bash>uname -m</bash>
Now, accordingly:
<ul {{NoIndentStyle}}>
<li>For i386:
<bash>#forcefully load Open-MPI into the environment
#the export command has been reported as needed due to the 
#module not being available in a clean installation
module load openmpi-i386 || export PATH=$PATH:/usr/lib/openmpi/bin

#ignore any error messages given by the command above

source $HOME/OpenFOAM/OpenFOAM-3.0.x/etc/bashrc foamCompiler=ThirdParty WM_COMPILER=Gcc48 WM_ARCH_OPTION=32 FOAMY_HEX_MESH=yes
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of30x='module load openmpi-i386; source \$HOME/OpenFOAM/OpenFOAM-3.0.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 3.0.x|of30x}}
</li>

<li>For x86_64, it depends on whether you need 64-bit integer support or not. But first, common to both, we will forcefully load Open-MPI into the environment (the export command has been reported as needed due to the module not being available in a clean installation):
<bash>module load openmpi-x86_64 || export PATH=$PATH:/usr/lib64/openmpi/bin</bash>
'''Note''': Ignore any error messages given by the command above.<br>
Now, depending 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-3.0.x/etc/bashrc foamCompiler=ThirdParty WM_COMPILER=Gcc48 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-3.0.x/etc/bashrc WM_LABEL_SIZE=64 foamCompiler=ThirdParty WM_COMPILER=Gcc48 FOAMY_HEX_MESH=yes
</bash>
</li>
</ul>

Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of30x='module load openmpi-x86_64; source \$HOME/OpenFOAM/OpenFOAM-3.0.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 3.0.x|of30x}}
</li>
</ul>

Note: You probably will see a message similar to this one and it's meant to do so until we've built the custom Gcc version:
<bash>Warning in /home/user/OpenFOAM/OpenFOAM-3.0.x/etc/config/settings.sh:
    Cannot find /home/user/OpenFOAM/ThirdParty-3.0.x/platforms/linux64/gcc-4.8.4 installation.
    Please install this compiler version or if you wish to use the system compiler,
    change the 'foamCompiler' setting to 'system'</bash>
</li>

<li>Now we'll have to get all of the scripts we'll need to build GCC and binutils (because OpenFOAM-3.0.x requires at least GCC 4.5 and CentOS only provides GCC 4.4):
<bash>cd $WM_THIRD_PARTY_DIR
wget "https://raw.github.com/wyldckat/scripts4OpenFOAM3rdParty/master/getGcc"
wget "https://raw.github.com/wyldckat/ThirdParty-2.0.x/binutils/makeBinutils"
wget "https://raw.github.com/wyldckat/ThirdParty-2.0.x/binutils/getBinutils"
chmod +x get* make*

#we need to disable the ''multilib'' functionality, since we won't need to build both 32 and 64bit architectures.
sed -i -e 's=\(--with-system-zlib \)=\1--disable-multilib =' makeGcc
</bash>
</li>

<li>CentOS 6.6 comes with CMake 2.6.4, but ParaView 4.4.0 needs a one of the versions from the more recent CMake 3.0 or newer and CGAL also needs CMake. Therefore, we'll need to do a custom build and we have to do it before we build the custom GCC+binutils (reason: [http://www.cfd-online.com/Forums/openfoam-installation/130205-paraview-4-redhat-possible.html#post478025]):
<bash>cd $WM_THIRD_PARTY_DIR
./makeCmake > log.mkcmake 2>&1
wmSET $FOAM_SETTINGS
</bash>
<ul {{NoIndentStyle}}>
<li>'''Note:''' If you've already tried building CMake and got this error message:
<bash>note: 'keypad' is defined in DSO /lib64/libtinfo.so.5 so try adding it to the linker command line</bash>
Then run:
<bash>mv $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_ARCH_OPTION/gcc-4.8.4 $WM_THIRD_PARTY_DIR/platforms/linux64/gcc-4.8.4.bak
./makeCmake > log.mkcmake 2>&1
mv $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_ARCH_OPTION/gcc-4.8.4.bak $WM_THIRD_PARTY_DIR/platforms/linux64/gcc-4.8.4
wmSET $FOAM_SETTINGS
</bash>
</li>
</ul>
</li>

<li>Now let's get and build Gcc 4.8.4 and company:
<bash>./getGcc gcc-4.8.4 gmp-5.1.2 mpfr-3.1.2 mpc-1.0.1
./makeGcc gcc-4.8.4 gmp-5.1.2 mpfr-3.1.2 mpc-1.0.1 > log.mkgcc 2>&1
wmSET $FOAM_SETTINGS</bash>
If it still gives you the same error message from #3, then something went wrong...
</li>

<li>Now let's get and build a custom GNU Binutils:
<bash>./getBinutils
./makeBinutils gcc-4.8.4 > log.mkbinutils 2>&1</bash>
</li>

<li>Now let's fix the Boost version in {{tt|makeCGAL}}:
<bash>sed -i -e 's=boost-system=boost_1_55_0=' makeCGAL
</bash>
</li>

<li>Now let's build CGAL, because we need to use custom options and we need the shell environment to be updated afterwards, for CGAL to be properly picked up for building OpenFOAM:
<bash># This next command will take a little while...
./makeCGAL gmp-5.1.2 mpfr-3.1.2 > log.mkcgal 2>&1

#update the shell environment
wmSET $FOAM_SETTINGS
</bash>
</li>

<li>CentOS 6.7 comes with Qt 4.6.2, but ParaView 4.4.0 needs at least 4.7. Therefore, we'll need to do a custom build of Qt 4.8.6:
<bash>cd $WM_THIRD_PARTY_DIR

#Get the scripts we need
wget https://github.com/wyldckat/scripts4OpenFOAM3rdParty/raw/master/getQt

#make them executable
chmod +x getQt

#define correct download version and download it
sed -i -e 's=4\.6=4.8=' -e 's=4\.8\.4=4.8.6=' -e 's=/\$major/\$tarFile=/$major/$version/$tarFile=' getQt
./getQt

./makeQt qt-4.8.6 > log.mkqt 2>&1</bash></li>

<li>Now, in order to build ParaView 4.4.0 that comes with OpenFOAM:
<ol>
<li>For building ParaView 4.4.0 with Python and MPI, run:
<bash>cd $WM_THIRD_PARTY_DIR

#We need to apply a fix for a problem with reading multiple solids in an STL
wget https://raw.githubusercontent.com/Kitware/VTK/40937e934308e5009e80769dc0c451ee4f157749/IO/Geometry/vtkSTLReader.cxx -O ParaView-4.4.0/VTK/IO/Geometry/vtkSTLReader.cxx 

#this will take a while... somewhere between 30 minutes to 2 hours or more
./makeParaView4 -qmake $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/qt-4.8.6/bin/qmake -mpi -python > log.makePV 2>&1
</bash>
</li>
<li>Once the {{tt|makeParaView4}} script is finished running, make sure to check the contents of the file {{tt|log.makePV}} and check if there are any errors.
</li>
<li>Finally, update the shell environment:
<bash>wmSET $FOAM_SETTINGS</bash>
</li>
</ol>
</li>

<li>Now let's build OpenFOAM:
<ol>
<li>Go into OpenFOAM's main source folder:
<bash>cd $WM_PROJECT_DIR</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>
</ol>


{{Installation/Linux/AliasReminder|OpenFOAM 3.0.x|of30x}}


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

<br>


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