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[[_TOC_]]
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In this tutorial we will use Geant4 version 11.2.0, compiled with the support of multithreading, GDML and Qt5 based Gui.
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In this tutorial we will use Geant4 version 11.2.1, compiled with the support of multithreading, GDML and Qt5 based Gui.
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On Linux systems we use a compiled version of Geant4 and a binary distribution for ROOT installations.
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```
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git clone https://gitlab.cern.ch/geant4/geant4.git
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cd geant4/
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git checkout v11.2.0
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This will create a clone of the Geant4 11.2.0 release on your local disk.
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git checkout v11.2.1
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This will create a clone of the Geant4 11.2.1 release on your local disk.
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The ROOT and Geant4 are installed with the current user as owner.
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You need to create a target directory owned by my current user:
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`sudo mkdir -p /usr/local/geant4/11.2.0`
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`sudo mkdir -p /usr/local/geant4/11.2.1`
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`sudo chown -R `id -un`:`id -gn` /usr/local/geant4`
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```
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```
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mkdir geant4-build
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cd geant4-build
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cmake -DCMAKE_INSTALL_PREFIX=/usr/local/geant4/11.2.0 \
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cmake -DCMAKE_INSTALL_PREFIX=/usr/local/geant4/11.2.1 \
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-DCMAKE_BUILD_TYPE=RelWithDebInfo [ -DGEANT4_BUILD_MULTITHREADED=ON ] \
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-DGEANT4_INSTALL_DATA=ON -DGEANT4_USE_GDML=ON -DGEANT4_USE_QT=ON \
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-DGEANT4_USE_OPENGL_X11=ON [-DGEANT4_USE_FREETYPE=ON] ../geant4
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| ... | ... | @@ -138,7 +138,7 @@ Now you can comile binaries and install Geant4: |
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cmake --build . --target install -- -j8
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```
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Geant4 is now installed in the `/usr/local/geant4/11.2.0` directory.
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Geant4 is now installed in the `/usr/local/geant4/11.2.1` directory.
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The installation script `build-geant4-ubuntu.sh` will do all these steps.
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fi
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# Geant4
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if [ -x /usr/local/geant4/11.2.0/bin/geant4.sh ]; then
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. /usr/local/geant4/11.2.0/bin/geant4.sh
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if [ -x /usr/local/geant4/11.2.1/bin/geant4.sh ]; then
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. /usr/local/geant4/11.2.1/bin/geant4.sh
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fi
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```
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$ cd ~/tmp
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$ mkdir B1-build
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$ cd B1-build
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$ cmake /usr/local/geant4/11.2.0/share/Geant4/examples/basic/B1
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$ cmake /usr/local/geant4/11.2.1/share/Geant4/examples/basic/B1
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```
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You should see something like the output below. Watch for eventual configuration errors.
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