Cannot build in either Windows or linux

[lokitkhemka]

While building with windows, I keep getting error ´module not found´ for both netgen and ngsolve.

ln linux, while building with GUI I get python not found error, while it finds python just fine without gui.

I don't know if the codebase is dumb, or I am. Maybe that is why I don't deserve to live. I wish I were dead.....

[mhochsteger]

Did you compile yourself or install with pip?
For self-compiled versions the errors could mean that cmake found one python version and you are using another at run-time.

You can check this on Linux with ldd, for instance on my machine:

ldd /opt/netgen/lib/python3.12/site-packages/ngsolve/ngslib.so | grep python

On Windows you can use dependencywalker and check ngslib.pyd.

No need to give up hope, I'm sure we can figure this out 😄

[lokitkhemka]

Thanks, I guess. My problem is bigger than one FEM repo. I love reading and learning FEA repos as a hobby, but only because I have tried and failed to get a job in this space. Is it any wonder I feel utterly useless?

During build process, I am getting error:

CMake Error at /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find Python3 (missing: Development.Module)
Call Stack (most recent call first):
  /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.22/Modules/FindPython/Support.cmake:3180 (find_package_handle_standard_args)
  /usr/share/cmake-3.22/Modules/FindPython3.cmake:490 (include)
  CMakeLists.txt:89 (find_package)

I have python3, python3-dev all installed in my machine. So, I don't understand the error.

EDIT: As an added context, this only happens when USE_GUI is turned on in CMake.

[lokitkhemka]

When I try to build with USE_GUI turned off, I get bunch of error, trying to build pybind11. I hope this helps.

The error is as follows:

error: ‘PyUnicode_AsUTF8AndSize’ was not declared in this scope; did you mean ‘PyUnicode_AsUTF8String’?
  411 |    = reinterpret_cast<const CharT *>(PyUnicode_AsUTF8AndSize(load_src.ptr(), &size));
      |                                      ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

This is just one of many errors, but it is indicative of the error. BTW, it is building pybind11, which is included in the repo.