When defined, the library will not create a compiler warning when a different version of the library was already included.
By default, the macro is not defined.
Mixing different library versions in the same code can be a problem as the different versions may not be ABI compatible.
The following warning will be shown in case a different version of the library was already included:
Already included a different version of the library!
Added in version 3.11.0.
Last update: March 8, 2023