That is exactly the problem, I do not want to change the whole includes to use arduino/WString.h, and I do not want to expose the whole Arduino.h in my files. Therefore I went with the last solution (to add the folder of WString.h to my build_flags).
The only problem I have with the following is that I was not able to pass a relative path to the compiler. For example:
build_flags =
-Ilib/custom_arduino_fakes/
When checking the verbose output of the compilation, I see that it is always translated into the following:
-IC:\Users\ME\.platformio\platforms\native\builder\lib\custom_arduino_fakes\
Which is of course not the path of my project.
Only passing the absolute full path gets translated to the correct relative path, so this:
build_flags =
-IC:/Users/ME/Development/PROJ/Firmware/lib/custom_arduino_fakes/
gets translated into this:
-Ilib/custom_arduino_fakes/
Trying to access the default variables did not work because they were always empty here in this context for some reason I do not know.
Do you have any suggestion to be able to use a relative path inside my project here without needing to pass the whole absolute path?