Many syntax errors when executing mongo-c-driver build

I am trying to install mongo-c-driver with this guide: Getting Started with MongoDB and C++ | MongoDB
The building process is going fine, but when I am trying to execute(install) it, I recieve MAAANY SYNTAX ERRORS:

Idk what is wrong, I hope You will help me.

@Roberto_Sanchez I sawn you help on this forum a lot, please help, I use MongoDB for educational purposes.