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  1. Enter the full path to the <GMAT> cloned repository on your computer
  2. Enter the full path to the folder where the GMAT build system should be placed
    1. CMake produces out-of-source builds. It is recommended to use <GMAT>/build/<OS>-cmakebuild for this value.
  3. Click "Configure"
    1. CMake may ask for permission to create the folder you specified in Step 2 ("Where to build the binaries")
    2. CMake will ask you to choose a generator (see Figure 4). See the CMake Generator webpage for an explanation of available generators.
      Recommended generators are:
      1. Mac: Unix Makefiles (although XCode has also been observed to work)
      2. Linux: Unix Makefiles
      3. Windows: Visual Studio (note e.g. "Visual Studio 12 2013" is 32-bit, whereas "Visual Studio 12 2013 x64" is 64-bit)

        Figure 4. Choosing a generator in CMake

        CMake choose generator

    3. CMake will start the configuration process, after which the Variable List and Configure Results sections (Figure 3 sections 4a and 4b) will be populated:

      Figure 5. Output of CMake Configure

      CMake initial configure
  4. Use the Configure results output box (Figure 3 section 4a) to change variables in the CMake variable list (Figure 3 section 4b) as follows:

    1. Always start at the top of the configure results output box and correct errors one-by-one
    2. For each error: change the appropriate CMake variable, re-configure, confirm the error was fixed (in the results output box), then repeat for next error
    3. In addition to errors, there are several CMake variables that allow you to control how the build system configures GMAT:

      CMake Variable (Group)DescriptionAssociated CMake Error
      CSPICE_DIR (Ungrouped)Path to CSPICE root directory
      (containing include/, lib/, etc.) 
      CSPICE NOT FOUND (make sure to run depends script from Step 1) 
      F2C_DIR (Ungrouped)Path to F2C root directory
      (containing f2c.h) 
      Note: this should generally be CSPICE_DIR/include
      F2C NOT FOUND (make sure to run depends
      script from Step 1) 
      CMAKE_BUILD_TYPE (CMAKE)On makefile systems, this specifies the desired build type
      On VisualStudio/XCode systems, this specifies all possible build types
      Valid values: Release, Debug, RelWithDebInfo, MinSizeRel
      Note: On makefile systems, you should create a separate out-of-source build folder for each desired build type (Figure 3 box 2).
      (e.g. cmakebuild-release or cmakebuild-debug)
      CMAKE_INSTALL_PREFIX (CMAKE)Location to install GMAT when doing make install
      or building the VisualStudio->INSTALL project  Note: This is autofilled to <GMAT>/GMAT-<release>-<OS>-<BitType> for convenience.

      Full path to the top-level GMAT Proprietary Plugins code/ folder.

      (folder that contains CMakeLists.txt) This will be automatically found if you name it gmatinternal-git and place it next to the main <GMAT> repository folder.

      Matlab_ROOT_DIR (Matlab)Path to MATLAB root directory
      (on Mac, this is the path to
      Matlab NOT FOUND (make sure MATLAB
      is installed) 
      PLUGIN_XXX (PLUGIN)Whether to build a particular GMAT Plugin
      Note: the proprietary plugins only show up here if
      GMAT_PROPRIETARY_PLUGINS has been correctly set 
      wxWidgets_ROOT_DIR (wxWidgets)Mac/Linux: Path to wxWidgets wx-config utility
      (usually this is the wxWidgets bin/ folder)
      Windows: Path to wxWidgets
      (containing include/ and lib/)
      wxWidgets NOT FOUND (make sure to run depends script from Step 1) 
      PYTHON_LIBRARY (PYTHON) (Advanced Variable)Requests that Use a specific installation of Python be used for GMAT's PythonInterface plugin. If this variable is blank, the latest found version of Python that can be found in default locations will be used. Set this to the FULL PATH to pythonXX.lib (e.g. C:/path/to/python35.lib) if you installed Python to a custom location.Python NOT FOUND (make sure Python is installed, and variable is set properly)
      XercesC_LIBRARY (Xerces)
      Xerces library and include folder locations.Failed to find XercesC (make sure to run depends script from Step 1)
  5. When all CMake errors are handled and you have specified all desired GMAT options, click "Generate".
    CMake will create the build system in the chosen out-of-source build folder (Figure 3 box 2).