Installing with pip requires call to ldconfig if preCICE is built from source

I built preCICE from source yesterday (on Linux Mint, with parameters suggested here) and installed it succesfully, but then, running pip install --user pyprecice generates an error libprecice.so.2 not found. Running sudo ldconfig before running pip is enough to fix it.
The issue doesn't appear if we install a .deb package for libprecice. I noticed that the post-installation script of the .deb does include a call to sudo ldconfig, which explains a lot.

Suggested fix : Either add a call to ldconfig in the installation instructions (on the website) or the the install script (probably hard, since ldconfig requires superuser, it would break install into a user-chosen path without superuser). Unless something is wrong on the binding side, but I doubt it.

The report concerns the source-build installation instructions, install script, and .deb post-installation script; begin by comparing those paths with the pip binding installation. Done means a source build followed by pip install works without a manual ldconfig call, or the required step is clearly documented.