View source for Installation/Linux/OpenFOAM-2.4.x/CentOS SL RHEL

= Introduction =
This page is dedicated to explaining how to install {{OpenFOAM}} {{version2.4.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 (mostly) at version {{tt|6.6}}.

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.

__FORCETOC__
__TOC__

= ''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 5.11 ==
Here you have the following choices:
* You can install from source, by either:
** Following the official instructions from here: [http://openfoam.org/download/source/ Repository Releases] - use ''2.4.x'' for the version.
** Or by following the detailed step-by-step instructions below...


Notes regarding the instructions below:
* The instructions below were tested with CentOS 5.11, but might work with 5.10 or newer versions.


'''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 readline-devel ncurses-devel \
texinfo gstreamer-plugins-base-devel libXext-devel libGLU-devel libXt-devel \
libXrender-devel libXinerama-devel libpng-devel libXrandr-devel libXi-devel \
libXft-devel libXcursor-devel

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

<li>In addition to this, we need the EPEL repository, so that we can install the package {{tt|qtwebkit-devel}} needed for building ParaView 4.1.0 with Python 2.6. The latest RPM link is usually available here: [https://fedoraproject.org/wiki/EPEL/FAQ#How_can_I_install_the_packages_from_the_EPEL_software_repository.3F EPEL FAQ: How can I install the packages from the EPEL software repository?]

The commands we'll use for this are as follows (the first one you might have to get the latest RPM link from the FAQ indicated above):
<bash>wget http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
rpm -Uvh epel-release-5-4.noarch.rpm

#disable the EPEL repository from being turned on by default
sed -i -e 's/enabled=1/enabled=0/' /etc/yum.repos.d/epel.repo

#now install the packages we need from EPEL
yum install --enablerepo=epel python26 python26-devel git-all
</bash>
</li>

<li>For building OpenFOAM itself and using the dedicated Open-MPI version, 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
mpi-selector --system --set openmpi-1.4-gcc-i386</bash></li>

<li>For x86_64:
<bash>#forcefully load Open-MPI into the environment
mpi-selector --system --set openmpi-1.4-gcc-x86_64</bash>
</li>
</ul>
</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-2.4.x.git
git clone https://github.com/OpenFOAM/ThirdParty-2.4.x.git
</bash>
But we will now have to download a few more of the necessary packages for the {{tt|ThirdParty-2.4.x}} folder:
<ol>
<li>First, we need to prepare for the downloads:
<bash>cd ThirdParty-2.4.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/v4.1/ParaView-v4.1.0-source.tar.gz
wget -P download http://www.cmake.org/files/v2.8/cmake-2.8.12.1.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34703/CGAL-4.6.tar.bz2
wget -P download http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.bz2
</bash>
</li>

<li>Next, we need to unpack the packages we've downloaded:
<bash>tar -xzf download/ParaView-v4.1.0-source.tar.gz
tar -xzf download/cmake-2.8.12.1.tar.gz
tar -xzf download/scotch_6.0.3.tar.gz
tar -xjf download/CGAL-4.6.tar.bz2
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-v4.1.0 ParaView-4.1.0
</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 GCC version 4.8.2 to 4.8.4, as well as switching to a custom built Boost version:
<bash>sed -i -e 's=gcc\-4\.8\.2=gcc-4.8.4=' OpenFOAM-2.4.x/etc/config/settings.sh
sed -i -e 's=boost-system=boost_1_55_0=' OpenFOAM-2.4.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>#make sure you start a new terminal window!!

#here you can change 4 to the number of cores you've got
source $HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc WM_NCOMPPROCS=4 foamCompiler=ThirdParty \
WM_COMPILER=Gcc48 WM_MPLIB=SYSTEMOPENMPI WM_ARCH_OPTION=32
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of24x='source \$HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 2.4.x|of24x}}
</li>

<li>For x86_64:
<bash>#make sure you start a new terminal window!!

#here you can change 4 to the number of cores you've got
source $HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc WM_NCOMPPROCS=4 foamCompiler=ThirdParty \
WM_COMPILER=Gcc48 WM_MPLIB=SYSTEMOPENMPI
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of24x='source \$HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 2.4.x|of24x}}
</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-2.4.x/etc/config/settings.sh:
    Cannot find /home/user/OpenFOAM/ThirdParty-2.4.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 2.3 requires at least GCC 4.5 and CentOS only provides GCC 4.4):
<bash>cd $WM_THIRD_PARTY_DIR
alias wget="wget --no-check-certificate"
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>
'''Note''': The {{tt|alias wget}} command is needed because wget on CentOS 5.11 is quite old now and can't handle very well HTTPS accesses to {{tt|raw.github.com}}.
</li>

<li>CentOS 5.11 comes with CMake 2.6.4, but ParaView 4.1.0 needs a one of the versions from the more recent CMake 2.8.x series 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><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 version for Boost 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>Now let's make a quick hack and then build OpenFOAM:
<bash>#Go into OpenFOAM's main source folder
cd $WM_PROJECT_DIR

#little hack for using libncurses for setSet
sed -i -e 's/LINK_FLAGS="\-lreadline"/LINK_FLAGS="-lreadline -lncurses"/' \
  $FOAM_UTILITIES/mesh/manipulation/setSet/Allwmake

# This next command will take a while... somewhere between 30 minutes to 3-6 hours.
./Allwmake > log.make 2>&1

#Run it a second time for getting a summary of the installation
./Allwmake > log.make 2>&1
</bash></li>

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

<li>CentOS 5.11 comes with Qt 4.2.1, but ParaView 4.1.0 needs at least 4.7. Therefore, we'll need to do a custom build of Qt 4.8.6:
<bash>cd $WM_THIRD_PARTY_DIR
wget "https://raw.github.com/wyldckat/scripts4OpenFOAM3rdParty/master/getQt"
chmod +x getQt
sed -i -e 's=4\.6=4.8=' -e 's=4\.8\.4=4.8.6=' -e 's=/\$major/\$tarFile=/$major/$version/$tarFile=' getQt
./getQt

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

<li>Now, in order to build ParaView 4.1.0 that comes with OpenFOAM:
<ol>
<li>We need to first apply a fix and then we can build with both MPI and Python support:
<bash>cd $WM_THIRD_PARTY_DIR/ParaView-4.1.0
wget http://www.paraview.org/pipermail/paraview/attachments/20140210/464496cc/attachment.bin -O Fix.patch
patch -p1 < Fix.patch
cd ..

sed -i -e 's=which python=which python26=' etc/tools/ParaView4Functions
</bash>
</li>
<li>Now let's build ParaView:
<bash>./makeParaView4 -qmake $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/qt-4.8.6/bin/qmake \
PYTHON_EXECUTABLE:FILEPATH=/usr/bin/python26 -mpi -python > log.makePV 2>&1
</bash>
While ParaView is being built, you might want to check the file {{tt|log.makePV}} to check how it's coming along with the build and to check if there were any major errors; there could be some error messages, but some of them will not stop the build from concluding with success.
</li>
<li>Now let's build the official OpenFOAM reader for ParaView:
<bash>cd $FOAM_UTILITIES/postProcessing/graphics/PV4Readers 
wmSET $FOAM_SETTINGS
./Allwclean 
./Allwmake
</bash>
</li>
</ol>
</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>
</ol>


{{Installation/Linux/AliasReminder|OpenFOAM 2.4.x|of24x}}


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

<br>

== CentOS 6.6 ==
Here you have the following choices:
* You can install from source, by either:
** Following the official instructions from here: [http://openfoam.org/download/source/ Repository Releases] - use ''2.4.x'' for the version.
** Or by following the detailed step-by-step instructions below...


Notes regarding the instructions below:
* The instructions below were tested with CentOS 6.6, but might work with 6.5 or newer versions.


'''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-2.4.x.git
git clone https://github.com/OpenFOAM/ThirdParty-2.4.x.git
</bash>
But we will now have to download a few more of the necessary packages for the {{tt|ThirdParty-2.4.x}} folder:
<ol>
<li>First, we need to prepare for the downloads:
<bash>cd ThirdParty-2.4.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/v4.1/ParaView-v4.1.0-source.tar.gz
wget -P download http://www.cmake.org/files/v2.8/cmake-2.8.12.1.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34703/CGAL-4.6.tar.bz2
wget -P download http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.bz2
</bash>
</li>

<li>Next, we need to unpack the packages we've downloaded:
<bash>tar -xzf download/ParaView-v4.1.0-source.tar.gz
tar -xzf download/cmake-2.8.12.1.tar.gz
tar -xzf download/scotch_6.0.3.tar.gz
tar -xjf download/CGAL-4.6.tar.bz2
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-v4.1.0 ParaView-4.1.0
</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 GCC version 4.8.2 to 4.8.4, as well as switching to a custom built Boost version:
<bash>sed -i -e 's=gcc\-4\.8\.2=gcc-4.8.4=' OpenFOAM-2.4.x/etc/config/settings.sh
sed -i -e 's=boost-system=boost_1_55_0=' OpenFOAM-2.4.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

#here you can change 4 to the number of cores you've got
source $HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc WM_NCOMPPROCS=4 foamCompiler=ThirdParty \
WM_COMPILER=Gcc48 WM_MPLIB=SYSTEMOPENMPI WM_ARCH_OPTION=32
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of24x='module load openmpi-i386; source \$HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 2.4.x|of24x}}
</li>

<li>For x86_64:
<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-x86_64 || export PATH=$PATH:/usr/lib64/openmpi/bin 

#ignore any error messages given by the command above

#here you can change 4 to the number of cores you've got
source $HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc WM_NCOMPPROCS=4 foamCompiler=ThirdParty \
WM_COMPILER=Gcc48 WM_MPLIB=SYSTEMOPENMPI
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of24x='module load openmpi-x86_64; source \$HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 2.4.x|of24x}}
</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-2.4.x/etc/config/settings.sh:
    Cannot find /home/user/OpenFOAM/ThirdParty-2.4.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 2.3 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 4.1.0 needs a one of the versions from the more recent CMake 2.8.x series 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><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 version for Boost 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>Now let's build OpenFOAM:
<bash>#Go into OpenFOAM's main source folder
cd $WM_PROJECT_DIR

# This next command will take a while... somewhere between 30 minutes to 3-6 hours.
./Allwmake > log.make 2>&1

#Run it a second time for getting a summary of the installation
./Allwmake > log.make 2>&1
</bash></li>

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

<li>CentOS 6.6 comes with Qt 4.6.2, but ParaView 4.1.0 needs at least 4.7. Therefore, we'll need to do a custom build of Qt 4.8.6:
<bash>cd $WM_THIRD_PARTY_DIR
wget "https://raw.github.com/wyldckat/scripts4OpenFOAM3rdParty/master/getQt"
chmod +x getQt
sed -i -e 's=4\.6=4.8=' -e 's=4\.8\.4=4.8.6=' -e 's=/\$major/\$tarFile=/$major/$version/$tarFile=' getQt
./getQt

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

<li>Now, in order to build ParaView 4.1.0 that comes with OpenFOAM:
<ol>
<li>We need to first apply a fix and then we can build with both MPI and Python support:
<bash>cd $WM_THIRD_PARTY_DIR/ParaView-4.1.0
wget http://www.paraview.org/pipermail/paraview/attachments/20140210/464496cc/attachment.bin -O Fix.patch
patch -p1 < Fix.patch
cd ..
</bash>
</li>
<li>Now let's build ParaView:
<bash>./makeParaView4 -qmake $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/qt-4.8.6/bin/qmake \
-mpi -python > log.makePV 2>&1
</bash>
While ParaView is being built, you might want to check the file {{tt|log.makePV}} to check how it's coming along with the build and to check if there were any major errors; there could be some error messages, but some of them will not stop the build from concluding with success.
</li>
<li>Now let's build the official OpenFOAM reader for ParaView:
<bash>cd $FOAM_UTILITIES/postProcessing/graphics/PV4Readers 
wmSET $FOAM_SETTINGS
./Allwclean 
./Allwmake
</bash>
</li>
</ol>
</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>
</ol>


{{Installation/Linux/AliasReminder|OpenFOAM 2.4.x|of24x}}


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

<br>

== CentOS 7.1 ==
Here you have the following choices:
* You can install from source, by either:
** Following the official instructions from here: [http://openfoam.org/download/source/ Repository Releases] - use ''2.4.x'' for the version.
** Or by following the detailed step-by-step instructions below...


Notes regarding the instructions below:
* The instructions below were tested with CentOS 7.1, but might work with 7.0 or newer versions.
* There is no support for the 32-bit architectures in CentOS 7, therefore these instructions only address the x86_64 architecture.


'''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 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 cmake qt-devel qt-assistant \
mpfr-devel gmp-devel

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

<li>In addition to this, we need the EPEL repository, so that we can install the package {{tt|qtwebkit-devel}} needed for building ParaView 4.1.0. The latest RPM link is usually available here: [https://fedoraproject.org/wiki/EPEL/FAQ#How_can_I_install_the_packages_from_the_EPEL_software_repository.3F EPEL FAQ: How can I install the packages from the EPEL software repository?]

The commands we'll use for this are as follows (the first one you might have to get the latest RPM link from the FAQ indicated above):
<bash>rpm -Uvh http://download.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

#disable the EPEL repository from being turned on by default
sed -i -e 's/enabled=1/enabled=0/' /etc/yum.repos.d/epel.repo

#now install the packages we need from EPEL
yum install --enablerepo=epel qtwebkit-devel
</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-2.4.x.git
git clone https://github.com/OpenFOAM/ThirdParty-2.4.x.git
</bash>
But we will now have to download a few more of the necessary packages for the {{tt|ThirdParty-2.4.x}} folder:
<ol>
<li>First, we need to prepare for the downloads:
<bash>cd ThirdParty-2.4.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/v4.1/ParaView-v4.1.0-source.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
wget -P download https://gforge.inria.fr/frs/download.php/file/34703/CGAL-4.6.tar.bz2
wget -P download http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.bz2
</bash>
</li>

<li>Next, we need to unpack the packages we've downloaded:
<bash>tar -xzf download/ParaView-v4.1.0-source.tar.gz
tar -xzf download/scotch_6.0.3.tar.gz
tar -xjf download/CGAL-4.6.tar.bz2
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-v4.1.0 ParaView-4.1.0
</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, namely switching to a custom built Boost version:
<bash>sed -i -e 's=boost-system=boost_1_55_0=' OpenFOAM-2.4.x/etc/config/CGAL.sh
</bash>
</li>

<li>For building OpenFOAM itself,  you'll need to ''source'' the correct environment settings:
<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 mpi/openmpi-x86_64 || export PATH=$PATH:/usr/lib64/openmpi/bin 

#ignore any error messages given by the command above

#here you can change 4 to the number of cores you've got
source $HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc WM_NCOMPPROCS=4 WM_MPLIB=SYSTEMOPENMPI
</bash>
Also, save an ''alias'' in the personal {{tt|.bashrc}} file, simply by running the following command:
<bash>echo "alias of24x='module load mpi/openmpi-x86_64; source \$HOME/OpenFOAM/OpenFOAM-2.4.x/etc/bashrc $FOAM_SETTINGS'" >> $HOME/.bashrc
</bash>
{{Installation/Linux/AliasNote|OpenFOAM 2.4.x|of24x}}
</li>

<li>Now let's fix the version for Boost in {{tt|makeCGAL}}:
<bash>cd $WM_THIRD_PARTY_DIR
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 > log.mkcgal 2>&1

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

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

# This next command will take a while... somewhere between 30 minutes to 3-6 hours.
./Allwmake > log.make 2>&1

#Run it a second time for getting a summary of the installation
./Allwmake > log.make 2>&1
</bash></li>

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

<li>Now, in order to build ParaView 4.1.0 that comes with OpenFOAM:
<ol>
<li>We need to first apply a fix and then we can build with both MPI and Python support:
<bash>cd $WM_THIRD_PARTY_DIR/ParaView-4.1.0
wget http://www.paraview.org/pipermail/paraview/attachments/20140210/464496cc/attachment.bin -O Fix.patch
patch -p1 < Fix.patch
cd ..
</bash>
</li><li>Now we can build ParaView:
<bash>./makeParaView4 -qmake $(which qmake-qt4) -mpi -python > log.makePV 2>&1
</bash>
While ParaView is being built, you might want to check the file {{tt|log.makePV}} to check how it's coming along with the build and to check if there were any major errors; there could be some error messages, but some of them will not stop the build from concluding with success.
</li>
<li>Now let's build the official OpenFOAM reader for ParaView:
<bash>cd $FOAM_UTILITIES/postProcessing/graphics/PV4Readers 
wmSET $FOAM_SETTINGS
./Allwclean 
./Allwmake
</bash>
</li>
</ol>
</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>
</ol>


{{Installation/Linux/AliasReminder|OpenFOAM 2.4.x|of24x}}


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



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