Appendix C Compiling the source code

Stable releases and nightly source snapshots are available from http://geuz.org/gmsh/src/. You can also access the subversion repository directly:

The first time you want to download the latest full source, type:
```
svn co https://geuz.org/svn/gmsh/trunk gmsh
```
You will be asked to accept the security certificate and to provide your username and password. (Use gmsh/gmsh for read-only access.)
To update your local version to the latest and greatest, go in the gmsh directory and type:
```
svn update
```
If you have write access, to commit your changes to the central repository, go in the gmsh directory and type:
```
svn commit
```

Once you have the source code, you need to run CMake to configure your build (see the ‘README.txt’ file in the top-level source directory for detailed information on how to run CMake).

Each build can be configured using a series of options, to selectively enable optional modules or features. Here is the list of CMake options:

ENABLE_3M: Enable proprietary 3M extension (default: OFF)
ENABLE_ACIS: Enable ACIS geometrical models (experimental) (default: ON)
ENABLE_ANN: Enable ANN (used for fast point search in mesh/post) (default: ON)
ENABLE_BAMG: Enable Bamg 2D anisotropic mesh generator (default: ON)
ENABLE_BFGS: Enable BFGS (used by some mesh optimizers) (default: ON)
ENABLE_BLAS_LAPACK: Enable BLAS/Lapack for linear algebra (required for meshing) (default: ON)
ENABLE_BLOSSOM: Enable Blossom algorithm (needed for full quad meshing) (default: ON)
ENABLE_BUILD_LIB: Enable ’lib’ target for building static Gmsh library (default: OFF)
ENABLE_BUILD_SHARED: Enable ’shared’ target for building shared Gmsh library (default: OFF)
ENABLE_BUILD_DYNAMIC: Enable dynamic Gmsh executable (linked with shared lib) (default: OFF)
ENABLE_BUILD_ANDROID: Enable Android NDK library target (experimental) (default: OFF)
ENABLE_BUILD_IOS: Enable iOS (ARM) library target (experimental) (default: OFF)
ENABLE_CGNS: Enable CGNS mesh export (experimental) (default: OFF)
ENABLE_CAIRO: Enable Cairo to render fonts (experimental) (default: ON)
ENABLE_CHACO: Enable Chaco mesh partitioner (alternative to Metis) (default: ON)
ENABLE_DINTEGRATION: Enable discrete integration (needed for levelsets) (default: ON)
ENABLE_FLTK: Enable FLTK graphical user interface (requires mesh/post) (default: ON)
ENABLE_FOURIER_MODEL: Enable Fourier geometrical models (experimental) (default: OFF)
ENABLE_GMM: Enable GMM linear solvers (simple alternative to PETSc) (default: ON)
ENABLE_GRAPHICS: Enable building graphics lib even without GUI (advanced) (default: OFF)
ENABLE_KBIPACK: Enable Kbipack (neeeded by homology solver) (default: ON)
ENABLE_MATHEX: Enable math expression parser (used by plugins and options) (default: ON)
ENABLE_MED: Enable MED mesh and post file formats (default: ON)
ENABLE_MESH: Enable mesh module (required by GUI) (default: ON)
ENABLE_METIS: Enable Metis mesh partitioner (default: ON)
ENABLE_MMG3D: Enable MMG3D 3D anisotropic mesh refinement (default: ON)
ENABLE_MPEG_ENCODE: Enable built-in MPEG movie encoder (default: ON)
ENABLE_MPI: Enable MPI (mostly for parser and solver - mesh generation is sequential) (default: OFF)
ENABLE_MSVC_STATIC_RUNTIME: Enable static Visual C++ runtime (default: OFF)
ENABLE_NATIVE_FILE_CHOOSER: Enable native file chooser in GUI (default: ON)
ENABLE_NETGEN: Enable Netgen 3D frontal mesh generator (default: ON)
ENABLE_OCC: Enable Open CASCADE geometrical models (default: ON)
ENABLE_ONELAB: Enable OneLab solver interface (default: ON)
ENABLE_ONELAB_METAMODEL: Enable OneLab metamodels (experimental) (default: ON)
ENABLE_OPENMP: Enable OpenMP (experimental) (default: OFF)
ENABLE_OPTHOM: Enable high-order mesh optimization tools (default: ON)
ENABLE_OS_SPECIFIC_INSTALL: Enable OS-specific (e.g. app bundle) installation (default: ON)
ENABLE_OSMESA: Enable OSMesa for offscreen rendering (experimental) (default: OFF)
ENABLE_PARSER: Enable GEO file parser (required for .geo/.pos files) (default: ON)
ENABLE_PETSC: Enable PETSc linear solvers (required for SLEPc) (default: ON)
ENABLE_PLUGINS: Enable post-processing plugins (default: ON)
ENABLE_POST: Enable post-processing module (required by GUI) (default: ON)
ENABLE_POPPLER: Enable Poppler for displaying PDF documents (experimental) (default: OFF)
ENABLE_QT: Enable dummy QT graphical interface proof-of-concept (experimental) (default: OFF)
ENABLE_RTREE: Enable RTREE (used for quad/hex mesh generation) (default: ON)
ENABLE_SALOME: Enable Salome routines for CAD healing (default: ON)
ENABLE_SGEOM: Enable SGEOM interface to OCC (experimental) (default: OFF)
ENABLE_SLEPC: Enable SLEPc eigensolvers (required for conformal compounds) (default: ON)
ENABLE_SOLVER: Enable built-in finite element solvers (required for compounds) (default: ON)
ENABLE_TAUCS: Enable Taucs linear solver (alternative to PETSc) (default: ON)
ENABLE_TETGEN: Enable Tetgen 3D initial mesh generator (default: ON)
ENABLE_TETGEN_OLD: Enable older version of Tetgen (default: OFF)
ENABLE_VORO3D: Enable Voro3D (for hex meshing, experimental) (default: ON)
ENABLE_WRAP_JAVA: Enable generation of Java wrappers (experimental) (default: OFF)
ENABLE_WRAP_PYTHON: Enable generation of Python wrappers (default: OFF)

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