Build GmshDDM on Windows

Here are detailed instructions on how to build GmshDDM on Windows, using Cygwin and the MinGW compilers. The resulting programs do not depend on the cygwin DLL, i.e. are pure Windows executables.

1. Install GmshFEM by following the instructions on https://gitlab.onelab.info/gmsh/fem/-/wikis/Compilation#building-gmshfem-on-windows

2. Build and install GmshDDM:

cd
git clone https://gitlab.onelab.info/gmsh/ddm.git
cd ddm
mkdir build
cd build
cmake ..
make install

2. Compile an example:

cd
cd ddm/demos/helmholtz/waveguide/
mkdir build
cd build
cmake ..
make
./demo.exe