[Users] Problem installation Einstein Toolkit

[Roland Haas]

Hello Elena,

> Thank you for answering. I still have problems. This is the output of
> the compilation before the error:

Thanks for including the log file. 

The error show there is 

--8<--
ld: library not found for -lsz
collect2: error: ld returned 1 exit status
--8<--

indicating that the linker did not find the libsz library file. This
library is used by HDF5. 

The log file does not quite contain enough information to let me know
which HDF5 was used. For that it would have to be a log file form a
fresh compilation, eg after removing the `configs` directory using

rm -rf configs

Looking at the Option list (and the paths in the error messages) this
seems to be a macOS laptop using macports, yes?

In that case the first thing to check would be that you have installed
the packages listed under the "Prerequisites" section in

https://github.com/einsteintoolkit/jupyter-et/blob/master/tutorial-server/notebooks/CactusTutorial.ipynb

Which will install a copy of hdf5 from macports.

Though, having just tested this on my own macbook (Sonoma 14.6.1,
newest XCode and macports) I get the same error. So let's see...

Ok, there's a libsz in 

/opt/local/lib/libaec/lib/

which (one way, not the best but should do for now until I can update
the instructions more properly) can be made available by doing

```
export LIBRARY_PATH=/opt/local/lib/libaec/lib
```

before running `sim build`.

With this I still get some warnings that are however harmless and I can
run the resulting executable. Eg

```
./exe/cactus_sim -T
```

which will output a (long) list of all compiled in thorns.

Yours,
Roland

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