## MFront

MFront / TFEL support is enabled by the CMake-option -DOGS_USE_MFRONT=ON and can be installed

• system-wide,
• in the user directory or
• automatically inside the OGS build-directory.

## System-wide install

If you install it system-wide it will get picked up by CMake (when the mfront-executable is in the PATH). Make sure to install a compatible version! Currently OGS requires the TFEL branch rliv-3.4. Check the CMake output for version information of MFront / TFEL.

## Installation in the user directory

If you need another version of MFront / TFEL (e.g. for model development) as required for OGS one solution is to install MFront / TFEL in your user-directory with a version-suffix, see the official documentation for instructions! In this case you can use the mfront executable by using the binary name with the suffix, e.g. mfront-4.0.0-dev and OGS will automatically download and build a compatible MFront / TFEL version inside the build directory.

## Automatic installation

If you do not want to care about all this simply do not install MFront / TFEL and OGS will automatically download and build a compatible MFront / TFEL version inside the build directory.

This article was written by Lars Bilke. If you are missing something or you find an error please let us know.
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