attempting to build netgen from git source using cmake with occ (opencascade)

i'm attempting to build netgen from git source using cmake with occ support but i keep seeing errors in the `CMakeCache.txt` after running cmake to setup netgen for build.

the cmake command i'm using is,

```
cmake \
-DCMAKE_PREFIX_PATH="$bp/Cellar/opencascade/7.5.3/lib/cmake" \
-DUSE_OCC:BOOL=ON \
--graphviz=/opt/code/ltmp/netgen-deps/netgen.graphviz.dep \
-DCMAKE_INSTALL_PREFIX=/opt/beta/netgen ../netgen-src
```

and when i view the `CMakeCache.txt` file in the build dir i see something like the below snippet inside the file,


```
//enable mpi4py interface
USE_MPI4PY:BOOL=ON

//build for native cpu architecture
USE_NATIVE_ARCH:BOOL=ON

//compile with NUMA-aware code
USE_NUMA:BOOL=OFF

//(not supported) compile with OpenCascade geometry kernel
USE_OCC:BOOL=ON

//build with python interface
USE_PYTHON:BOOL=ON

//Enable spd log logging
USE_SPDLOG:BOOL=OFF
```

and looking over the netgen documentation for cmake flags i see,

docu.ngsolve.org/latest/install/cmakeoptions.html

what am i doing wrong here?

Hi ipatch,

you may try to install `libocct-data-exchange-dev` and `libocct-draw-dev`. Helped in my case.

Best,
Matthias R

thanks for the suggestion, but unfortunately those packages look like their for a debian based distro, and i'm attempting to setup netgen on a macos box.