Gabriele Cosmo
81 lines
2.7 KiB
Markdown
81 lines
2.7 KiB
Markdown
\page README_HowToRun How to build and run an example
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All basic and most of extended examples have a similar structure.
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The `main()` function is included in `exampleXYZ.cc` in the example top directory
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and the example source code is structered in `include` and `src` subdirectories.
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When the example is built, the executable takes the same name as the file with
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`main()` function without the `.cc` extension, `exampleXYZ`.
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Then several macros are provided to run the example with various start-up
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conditions. These macros have usually the `.mac` extension. Besides these macros,
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there is often a macro `exampleXYZ.in` (note its different extension)
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which is used in Geant4 testing and which output, `exampleXYZ.out`, can be also included
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in the distribution.
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You can find all details about building the examples in the <a href= "https://geant4-userdoc.web.cern.ch/UsersGuides/InstallationGuide/html/index.html"> Geant4 Installation Guide </a>, in the section <a href="https://geant4-userdoc.web.cern.ch/UsersGuides/InstallationGuide/html/buildtools.html"> How to Use the Geant4 Toolkit Libraries </a>.
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Here we recall only the basics.
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## Compile and link to generate an executable
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```
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% cd path_to_exampleXYZ # go to directory which contains your example
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% mkdir exampleXYZ_build
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% cd exampleXYZ_build
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% cmake -DGeant4_DIR=path_to_Geant4_installation/lib[64]/cmake/Geant4/ ../exampleXYZ
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% make -j N exampleXYZ # "N" is the number of processes
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```
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## Execute exampleXYZ in 'batch' mode from macro files
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```
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% cd exampleXYZ_build
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% ./exampleXYZ xyz.mac
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```
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## Execute exampleXYZ in the 'interactive mode' with visualization
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```
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% cd exampleXYZ_build
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% ./exampleXYZ
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....
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Idle> type your commands
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....
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Idle> exit
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```
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See also the explicit instructions for building TestEm1 example at
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\ref README_HowToRunTestEm1 page.
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\page README_HowToRunTestEm1 How to build and run TestEm1 example
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Below we give the explicit instructions (described in general at \ref README_HowToRun page) for the example extended/electromagnetic/TestEm1.
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Let's suppose that the `TestEm1` directory is available in `$HOME` and Geant4 installation in `/usr/local` and we work within the `bash` shell on a `64-bit machine.
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## Compile and link TestEm1 to generate an executable
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```
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% cd $HOME
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% mkdir TestEm1_build
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% cd TestEm1_build
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% cmake -DGeant4_DIR=/usr/local/lib64/Geant4-11.3.0/ ../TestEm1
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% make -j 2 TestEm1
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```
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## Execute TestEm1 in 'batch' mode from macro files
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```
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% cd $HOME/TestEm1_build
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% ./TestEm1 annihil.mac
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% ./TestEm1 brem.mac
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% ./TestEm1 TestEm1.in >& myTestEm1.out # redirecting output in a file
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```
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## Execute TestEm1 in 'interactive mode' with visualization
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```
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% cd $HOME/TestEm1_build
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% ./TestEm1
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PreInit> /run/initialize
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Idle> /run/beamOn 1
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...
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Idle> exit
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```
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