STM8AF6213. Looking at tutorial videos I see that programmers use the #include <library.h> command at the beginning. Surely this removes the need to have many #deifine statements at the beginning. Are such libraries avilable?

[Tesla DeLorean]

The C compilers should work materially simular to most others.

T​here should be STM8 libraries and examples available for download via the product pages. You could code these differently if they are unsatisfactory, or you could move the #define into your own include files if you didn't want to see them.