Update readme

[pchaillo]

Hi,

I just add a detail on the pybind11 library in order to make sure that people install pybind11 with apt-get and not with pip.

Bests,

Paul

[alxbilger]

What's the problem with pip? Can we do something to fix it?

[alxbilger]

Hi @pchaillo, can you give us some news about this PR. What happens if you install with pip?

TODO:

• Add this detail in the doc
• Mention this for Linux only

[bakpaul]

Hello, I am sorry but I don't think those packages are required, installing through pip is enough.
Actually, it is even recommended to use pip installed packages for as many python dependency as possible, to enable multiple python version usage on your system.

But, doing so, pybind11 will not be found automatically by CMake, you'll need to modify a the CMake option CMAKE_PREFIX_PATH and append the path to pybind11 cmake files. For instance of our github builders we retrieve this folder by calling pybind11_DIR="$(pybind11-config --cmakedir)". On my ubuntu it looks like that : /usr/lib/python3/dist-packages/pybind11/share/cmake/pybind11.

Could you try this and see if it works for you and if it does, we can close this PR.

[hugtalbot]

Let's close the PR @pchaillo
If you get some time to work on it again, please feel free to reopen it