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   | \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox        |
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   |   \\  /    A nd           | Copyright (C) 2016-2018 OpenCFD Ltd.         |
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   |    \\/     M anipulation  |                                              |
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---

# OpenFOAM&reg; ThirdParty Build

OpenFOAM depends to a certain extent on third-party libraries
(*opensource only*). It also provides some interfaces to *opensource* or
*proprietary* libraries. This third-party package contains configurations and
scripts for building third-party packages. It should normally only be used in
conjunction with the corresponding OpenFOAM version.

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## Organization
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The ThirdParty directory contains a number of build scripts as well as
some directories:
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| Directory         | Contains
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|-------------------|-------------------------------------------------------
| etc/              | auxiliary tools and content used for the build process
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| build/            | intermediate build objects
| platforms/        | the installation directories
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## Configuration of Third-Party Versions
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For most of the build scripts, the default software version
is provided by an appropriate OpenFOAM `etc/config.sh/...` entry.
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This approach avoids duplicate entries for the default versions and
ensures the best overall consistency between the OpenFOAM installation
and its corresponding third-party installation.

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Nonethess, the distributed make scripts can generally be used for a
variety of versions of the third-party libraries, with the software
version specified on the command-line. For example,

    $ ./makeFFTW -help
    usage: makeFFTW [OPTION] [fftw-VERSION]

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---

## Before Starting

0. Review the [system requirements](http://www.openfoam.com/documentation/system-requirements.php)
   and decide on the following:
   * compiler type/version - if the system compiler is not relatively recent,
     you will need a [third-party compiler](#makeGcc) installation.
   * MPI type/version.
   * ParaView type/version.
   * CMake type/version, ...
1. If you are using a system MPI (eg, openmpi), ensure that this environment
   has also been properly activated for your user.
   Often (but not always) a `mpi-selector` command is available for this purpose.
   You may need to open a new shell afterwards for the change to take effect.
   Using the following command may help diagnosing things:

       which mpicc

2. Adjust the OpenFOAM `etc/bashrc`, `etc/config.sh/...` or equivalent
   `prefs.sh` files to reflect your preferred configuration.
   For many config files, there are several configuration possibilities:
   - Define a particular third-party version.
   - Use a system installation.
   - Disable use of an optional component.
   - Define an alternative site-wide central location.
   - After making the desired changes, use `wmRefresh` or equivalent to use the configurations.


---

## Building

Many components of ThirdParty are *optional* or are invoked
automatically as part of the top-level OpenFOAM `Allwmake`.
Nonetheless it may be necessary or useful to build various
ThirdParty components prior to building OpenFOAM itself.

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### Bootstrapping *(optional)*
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* `makeGcc` _or_ `makeLLVM` <a name="makeGcc"></a>
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   - Makes a third-party [gcc](#gcc-compiler) or [clang](#clang-compiler) installation,
     which is needed if the system gcc is [too old](#gcc-compiler).
     If your system compiler is recent enough, you can skip this step.
   - If you do use this option, you will need the following adjustments to the
     OpenFOAM `etc/bashrc` or your equivalent `prefs.sh` file:
     - `WM_COMPILER_TYPE=ThirdParty`
     - `WM_COMPILER=Gcc48` (for example)
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     - `WM_COMPILER=Clang40` (for example)
     - or `WM_COMPILER=Clang` and adjust `clang_version` in the OpenFOAM
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     `etc/config.sh/compiler` or equivalent.
   - More description is contained in the header comments of the
     `makeGcc` and `makeLLVM` files.
   - *Attention*: If you are building a newer version of clang, you may need to
     update your CMake beforehand.
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* `makeCmake`
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   - Makes a third-party [CMake](#general-packages) installation, which is
     needed if a system CMake does not exist or is [too old](#min-cmake),
   - Note that CMake is being used by an number of third-party packages
     (CGAL, LLVM, ParaView, VTK, ...)
     so this may become an increasingly important aspect of the build.
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Note that the order of the bootstrapping process may need to be
reversed, or even require a few loops. For example, if you may need a
newer version of CMake before being able to build LLVM/Clang and
subsequently use the newly build clang to create a newer version of
CMake in the desired location.

Additionally, if you are using clang but with ThirdParty locations for
gmp/mpfr you will need some extra work. Here is an example:

* Compile a new ThirdParty clang version:

      ./makeLLVM llvm-4.0.1

* Now adjust the OpenFOAM `prefs.sh` to use the new compiler settings,
  and update the OpenFOAM environment (eg, `wmRefresh`)

* Next use (abuse) the `makeGcc` script to compile gmp/mpfr libraries.
  It is best to pass the desired versions explicitly, and necessary
  to set the CC/CXX variables so that the correct compiler is used:

      CC=clang CXX=clang++  ./makeGcc gmp-6.1.2 mpfr-4.0.0 gcc-system

  specifying `gcc-system` effectively disables building of gcc,
  but will build the gmp/mpfr components.

* As a final step, it will be necessary to add the ThirdParty
  gmp/mpfr locations in the OpenFOAM config files since they are
  normally only used in combination with a ThirdParty gcc.
  The location to make these changes is in the `etc/config.sh/CGAL`,
  since this is the component that uses the mpfr library.
  For example,

      gmp_version=gmp-6.1.2
      mpfr_version=mpfr-4.0.0

      export GMP_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER_ARCH/$gmp_version
      export GMP_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER_ARCH/$mpfr_version

* Update update the OpenFOAM environment (eg, `wmRefresh`) again.


### Build Sequence

1. `Allwmake`
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   - This will be automatically invoked by the top-level OpenFOAM `Allwmake`, but
     can also be invoked directly to find possible build errors.
   - Builds an mpi library (openmpi or mpich), scotch decomposition, boost, CGAL, FFTW.
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   - If the optional kahip or metis  directories are found, they will also be compiled.
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2. `makeParaView`  *(optional but highly recommended)*
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   - This is optional, but extremely useful for visualization and for
     run-time post-processing function objects.
     You can build this at a later point in time, but then you should
     remember to rebuild the post-processing function objects and the
     reader module as well.
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3. Make any additional optional components
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#### Optional Components

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`makeADIOS`
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- Only required for [ADIOS](#parallel) support,
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  which is currently staged in the [add-ons repository][link AddOns].

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`makeCGAL`
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- Builds [boost](#general-packages) and [CGAL](#general-packages).
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  Automatically invoked from the ThirdParty `Allwmake`,
  but can be invoked directly to resolve possible build errors.

`makeFFTW`
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- Builds [FFTW](#general-packages).
  Automatically invoked from the ThirdParty `Allwmake`,
  but can be invoked directly to resolve possible build errors.

`makeKAHIP`
- Builds [KaHIP](#parallel) decomposition library.
  Automatically invoked from the ThirdParty `Allwmake`,
  but can be invoked directly to resolve possible build errors.

`makeMETIS`
- Builds [METIS](#parallel) decomposition library.
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  Automatically invoked from the ThirdParty `Allwmake`,
  but can be invoked directly to resolve possible build errors.

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`makeMGridGen`
- Optional agglomeration routines.

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`makeCCMIO`
- Only required for conversion to/from STARCD/STARCCM+ files.

`makeMesa`, `makeVTK`
- Additional support for building offscreen rendering components.
  Useful if you want to render on computer servers without graphics cards.
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  The `makeParaView.example` and `makeVTK.example` files offer some
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  suggestions about compiling such a configuration.

`makeQt`
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- Script to build a [Qt](#makeQt), including qmake.
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- Possibly needed for `makeParaView`.
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- The associated `etc/relocateQt` may be of independent use.
  Read the file for more details.
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`makeGperftools`
- Build gperftools (originally Google Performance Tools)

`minCmake`
- Scour specified directories for CMakeLists.txt and their cmake_minimum.
  Report in sorted order.

`Allclean`
- After building, this script may be used to remove intermediate build information
and save some disk space.


## Build Notes

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### CGAL
- The zlib library and zlib development headers are required.

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### Scotch
- The zlib library and zlib development headers are required.


### Mesa
- Needed for off-screen rendering.
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- Building with [mesa-11][link mesa11] and [mesa-13][link mesa13] both
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  seem okay, as does building with [mesa-17][link mesa].
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- Building with mesa-12 is not possible since it fails to create
  the necessary `include/GL` directory and `osmesa.h` file.

### VTK
- Needed for off-screen rendering and run-time post-processing without
  ParaView.
- Rather than downloading VTK separately, it is easy to reuse the VTK
  sources that are bundled with ParaView.
  For example, by using a symbolic link:

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      ln -s ParaView-v5.6.0/VTK VTK-8.2.0
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  The appropriate VTK version number can be found from the contents of
  the `vtkVersion.cmake` file.
  For example,

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      $ cat ParaView-v5.6.0/VTK/CMake/vtkVersion.cmake
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      # VTK version number components.
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      set(VTK_MAJOR_VERSION 8)
      set(VTK_MINOR_VERSION 2)
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      set(VTK_BUILD_VERSION 0)

### ParaView
- Building ParaView requires CMake, qmake and a `qt` development files.
  Use the `-cmake`, `-qmake` and `-qt-*` options for `makeParaView` as
  required.
  See additional notes below about [making Qt](#makeQt) if necessary.

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**NOTE** this step may not be entirely successful for your particular
system. Building ParaView itself is generally not a significant problem
but its dependency on particular Qt versions can be a problem.

If you fail at this step due to Qt dependencies, you may have success
building a slightly older Qt version. Another alternative may be to
use the ParaView-5.4 sources that were included in the ThirdParty-v1712
source pack. This, however, has never been tested in combination with
the OpenFOAM Catalyst insitu visualization.


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#### 5.6.x, 5.5.x binary packages
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For general functionality, the paraview version distributed with
the operating system or a [binary package][download ParaView]])
may be sufficient for your needs.
- No known issues with the native OpenFOAM reader.


Using a binary package does mean you miss these elements (which may or
may not be important for you):
- cannot visualize a `blockMeshDict`
- cannot build Catalyst insitu visualization
- no alternative OpenFOAM reader module for some special features not
  found in the native OpenFOAM reader.

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#### 5.5.x
- Requires patching for the vtk-m configuration (on some systems).
- Recommended patching for ParaView Catalyst.
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- Recommended patching for file series
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  No known issues with the native OpenFOAM reader.

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#### 5.4.x
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- Compiles without patching.
  No known issues with the native OpenFOAM reader.

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#### 5.3.0 and older are neither recommended nor supported
- Various compilation issues and known bugs.
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### ADIOS
- The github release currently requires GNU autoconf tools (eg,
  autoconf, autoheader, automake) for its configuration.
- Some inconsistency in directory names (ADIOS vs. adios) between releases.
- Optionally uses bzip2, zlib development headers (eg, libbz2-devel, zlib-devel)
  for the corresponding compression tranforms.
- The [zfp floating point compression][page zfp] library is now included as
  part of ADIOS.

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### Making Qt <a name="makeQt"></a>
- Building a third-party Qt installation (prior to building ParaView) requires
  some additional effort, but should nonetheless work smoothly.

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1. Download a [*qt-everywhere-opensource-src*][link Qt5] package and
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   unpack in the third-party directory.
2. Use the `makeQt` script with the QT version number. For example,

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       ./makeQt 5.9.3
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3. Build ParaView using this third-party QT. For example,

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       ./makeParaView -qt-5.9.3  5.6.0
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- ParaView versions prior to 5.3.0 do not properly support QT5.
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- If you relocate the third-party directory to another location
  (eg, you built in your home directory, but want to install it in a
  central location), you will need to use the `etc/relocateQt` script
  afterwards.

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*Note* On some older systems it can be quite difficult to build the
latest QT. In these cases, it is sometimes possible to build a
slightly older QT (eg, [qt-5.6.3][link Qt56]) instead.


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---

## Versions

### Gcc Compiler <a name="gcc-compiler"></a>

The minimum version of gcc required is 4.8.0.

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| Name              | Location
|-------------------|--------------------------------------------
| [gcc][page gcc]   | [releases][link gcc]
| [gmp][page gmp]   | system is often ok, otherwise [download][link gmp]
| [mpfr][page mpfr] | system is often ok, otherwise [download][link mpfr]
| [mpc][page mpc]   | system is often ok, otherwise [download][link mpc]
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#### Potential MPFR conflicts

If you elect to use a third-party version of mpfr, you may experience
conflicts with your installed system mpfr.
On some systems, mpfr is compiled as *non-threaded*, whereas the
third-party will use *threaded* by default.
This can cause some confusion at the linker stage, since it may
resolve the system mpfr first (and find that it is *non-threaded*).

You can avoid this by one of two means:
1. Use system components for gmp/mpfr/mpc:  `makeGcc -system ...`
2. Use third-party mpfr, but without threading: `makeGcc -no-threadsafe ...`


#### 32-bit build (on 64-bit)

If you have a 64-bit system, but wish to have a 32-bit compiler, you
will need to enable multi-lib support for Gcc: `makeGcc -multilib`,
which is normally disabled, since many (most?) 64-bit systems do not
install the 32-bit development libraries by default.


### Clang Compiler <a name="clang-compiler"></a>

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The minimum version of clang required is 3.5.
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*Attention*: If you are building a newer version of clang, you may need to
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update your CMake beforehand since GNU *configure* can only be used prior
to clang version 3.9.

If your system gcc is particularly old
(see [minimum gcc requirements for clang](#min-gcc))
you may have additional hurdles to using the newest versions of clang.
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| Name                  | Location
|-----------------------|------------------------
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| [clang][page clang]   | [download][link clang] or [newer][newer clang]
| [llvm][page llvm]     | [download][link llvm] or [newer][newer llvm]
| [openmp][page omp]    | [download][link omp] or [newer][newer omp]
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### General <a name="general-packages"></a>

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| Name                  | Location
|-----------------------|------------------------
| [CMake][page cmake]   | [download][link cmake]
| [boost][page boost]   | [download][link boost]
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| [CGAL][page CGAL]     | [download][link CGAL]
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| [FFTW][page FFTW]     | [download][link FFTW]
| [ADF/CGNS][page CGNS], ccm | [link ccmio][link ccmio]
| gperftools            | [repo][repo gperftools] or [download][link gperftools]
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### Parallel Processing <a name="parallel"></a>

| Name                  | Location
|-----------------------|------------------------
| [openmpi][page openmpi] | [download][link openmpi]. The newer [openmpi][newer openmpi] make exhibit stability issues.
| [adios][page adios]   | [repo][repo adios] or [github download][link adios] or [alt download][altlink adios]
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| [scotch, ptscotch][page scotch] | [download][link scotch] or older: [6.0.3][link scotch603]
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| [kahip][page kahip] | [download][link kahip]
| [metis][page metis] | [download][link metis]


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### Visualization <a name="viz-version"></a>

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| Name                  | Location
|-----------------------|------------------------
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| [MESA][page mesa]     | [download][link mesa] or [older 13][link mesa13], [older 11][link mesa11]
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| [ParaView][page ParaView] | [download][link ParaView] or [older paraview-55][link ParaView55], [older paraview-54][link ParaView54] or [binaries][download ParaView]
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| [Qt][page Qt]         | [QT5][link Qt5] for ParaView-5.3.0 and later, or the [older qt-56][link Qt56] for older systems.
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### CMake Minimum Requirements <a name="min-cmake"></a>

The minimum CMake requirements for building various components.

    2.8         llvm-3.4.2
    2.8.11      CGAL-4.9
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    2.8.11      CGAL-4.11
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    2.8.12.2    llvm-3.7.0
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    2.8.12.2    llvm-3.8.0
    2.8.4       cmake-3.6.0
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    3.3         ParaView-5.6.0
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    3.4.3       llvm-3.9.1
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    3.4.3       llvm-4.0.0 - llvm-6.0.0
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    3.6         ADIOS2
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### GCC Minimum Requirements <a name="min-gcc"></a>

The minimum gcc/g++ requirements for building various components.

    4.7         llvm-3.7.0
    4.7         llvm-3.6.2
    4.7         llvm-3.5.2
    4.4         llvm-3.4.2

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If your system gcc/g++ is too old to build the desired llvm/clang
version, you may need to build a lower llvm/clang version and then use
that clang compiler for building the newer llvm/clang version.

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<!-- gcc-related -->
[page gcc]:       http://gcc.gnu.org/releases.html
[page gmp]:       http://gmplib.org/
[page mpfr]:      http://www.mpfr.org/
[page mpc]:       http://www.multiprecision.org/

[link gcc]:       http://gcc.gnu.org/releases.html
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[link gmp]:       ftp://ftp.gnu.org/gnu/gmp/gmp-6.1.2.tar.xz
[link mpfr]:      ftp://ftp.gnu.org/gnu/mpfr/mpfr-4.0.1.tar.xz
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[link mpc]:       ftp://ftp.gnu.org/gnu/mpc/mpc-1.1.0.tar.gz
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<!-- clang-related -->
[page llvm]:      http://llvm.org/
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[page clang]:     http://clang.llvm.org/
[page omp]:       http://openmp.llvm.org/
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[link clang]:     http://llvm.org/releases/3.7.1/cfe-3.7.1.src.tar.xz
[link llvm]:      http://llvm.org/releases/3.7.1/llvm-3.7.1.src.tar.xz
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[link omp]:       http://llvm.org/releases/3.7.1/openmp-3.7.1.src.tar.xz
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[newer clang]:    http://llvm.org/releases/4.0.1/cfe-4.0.1.src.tar.xz
[newer llvm]:     http://llvm.org/releases/4.0.1/llvm-4.0.1.src.tar.xz
[newer omp]:      http://llvm.org/releases/4.0.1/openmp-4.0.1.src.tar.xz
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<!-- parallel -->
[page adios]:     https://www.olcf.ornl.gov/center-projects/adios/
[repo adios]:     https://github.com/ornladios/ADIOS
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[link adios]:     https://github.com/ornladios/ADIOS/archive/v1.13.1.tar.gz
[altlink adios]:  http://users.nccs.gov/~pnorbert/adios-1.13.1.tar.gz
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[page zfp]:       http://computation.llnl.gov/projects/floating-point-compression/zfp-versions

[page scotch]:    https://www.labri.fr/perso/pelegrin/scotch/
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[link scotch603]: https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
[link scotch605]: https://gforge.inria.fr/frs/download.php/file/37398/scotch_6.0.5a.tar.gz
[link scotch]:    https://gforge.inria.fr/frs/download.php/file/37622/scotch_6.0.6.tar.gz
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[page kahip]:     http://algo2.iti.kit.edu/documents/kahip/
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[link kahip]:     http://algo2.iti.kit.edu/schulz/software_releases/KaHIP_2.10.tar.gz
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[page metis]:     http://glaros.dtc.umn.edu/gkhome/metis/metis/overview
[link metis]:     http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/metis-5.1.0.tar.gz

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[page openmpi]:   http://www.open-mpi.org/
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[link openmpi]:   https://www.open-mpi.org/software/ompi/v1.10/downloads/openmpi-1.10.7.tar.bz2
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[newer openmpi]:  https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.1.tar.bz2
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<!-- general -->
[page cmake]:     http://www.cmake.org/
[link cmake]:     http://www.cmake.org/files/v3.5/cmake-3.5.2.tar.gz

[page boost]:     http://boost.org
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[link boost]:     https://sourceforge.net/projects/boost/files/boost/1.64.0/boost_1_64_0.tar.bz2
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[page CGAL]:      http://cgal.org
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[link CGAL]:      https://github.com/CGAL/cgal/releases/download/releases%2FCGAL-4.9.1/CGAL-4.9.1.tar.xz
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[page FFTW]:      http://www.fftw.org/
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[link FFTW]:      http://www.fftw.org/fftw-3.3.7.tar.gz
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[page cgns]:      http://cgns.github.io/
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[link ccmio]:     http://portal.nersc.gov/project/visit/third_party/libccmio-2.6.1.tar.gz (check usage conditions)
[altlink ccmio]:  http://portal.nersc.gov/svn/visit/trunk/third_party/libccmio-2.6.1.tar.gz (check usage conditions)
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[repo gperftools]: https://github.com/gperftools/gperftools
[link gperftools]: https://github.com/gperftools/gperftools/releases/download/gperftools-2.5/gperftools-2.5.tar.gz


<!-- Visualization -->

[page ParaView]:  http://www.paraview.org/
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[download ParaView]: https://www.paraview.org/download/
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[link ParaView54]: http://www.paraview.org/files/v5.4/ParaView-v5.4.1.tar.gz
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[link ParaView55]:   http://www.paraview.org/files/v5.5/ParaView-v5.5.2.tar.gz
[link ParaView]: http://www.paraview.org/files/v5.6/ParaView-v5.6.0.tar.gz
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[page mesa]:  http://mesa3d.org/
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[link mesa]:  ftp://ftp.freedesktop.org/pub/mesa/mesa-17.1.1.tar.xz
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[link mesa13]: ftp://ftp.freedesktop.org/pub/mesa/13.0.6/mesa-13.0.6.tar.xz
[link mesa11]: ftp://ftp.freedesktop.org/pub/mesa/older-versions/11.x/11.2.2/mesa-11.2.2.tar.xz
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[page Qt]: https://www.qt.io/download-open-source/
[repo Qt]: http://code.qt.io/cgit/qt-creator/qt-creator.git
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[link Qt56]: http://download.qt.io/official_releases/qt/5.6/5.6.3/single/qt-everywhere-opensource-src-5.6.3.tar.xz
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[link Qt5]: http://download.qt.io/official_releases/qt/5.9/5.9.3/single/qt-everywhere-opensource-src-5.9.3.tar.xz
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<!-- OpenFOAM -->

[link AddOns]: https://develop.openfoam.com/Community/OpenFOAM-addOns
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[link community-projects]: http://www.openfoam.com/community/projects.php
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---
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<!-- Standard Footer -->
## Additional OpenFOAM Links

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- [Community AddOns][link AddOns] repository
- [Collaborative and Community-based Developments][link community-projects]
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- [Download](http://www.openfoam.com/download) and
  [installation instructions](http://www.openfoam.com/code/build-guide.php)
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- [Documentation](http://www.openfoam.com/documentation)
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- [Reporting bugs/issues](http://www.openfoam.com/code/bug-reporting.php) (including bugs/suggestions/feature requests) in OpenFOAM
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- [Contacting OpenCFD](http://www.openfoam.com/contact)
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---

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Copyright 2016-2018 OpenCFD Ltd