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cb8bef9423
CMake is using stamp files to check if the external projects are out of date. There is an option 'BUILD_ALWAYS 1' of ExternalProject_Add, but it is not available prior to CMake 3.1. To work around it, this commit solves two problems at once: - Add a new step 'check_submodules' between configure and build to check if all submodules are up to date. This step has the option 'ALWAYS 1', which means it is always considered outdated. - Since 'build' depends on the above step, it will always be started
Netgen mesh generator
NETGEN is an automatic 3d tetrahedral mesh generator. It accepts input from constructive solid geometry (CSG) or boundary representation (BRep) from STL file format. The connection to a geometry kernel allows the handling of IGES and STEP files. NETGEN contains modules for mesh optimization and hierarchical mesh refinement. Netgen 6.x supports scripting via a Python interface. Netgen is open source based on the LGPL license. It is available for Unix/Linux, Windows, and OSX.