Issue Warning for Deprecated Library Function

Using Arduino Programming Questions
1

Hi. I'm working on updating one of my libraries. I will be deprecating certain functions and will remove them in the future.

Are there any slick preprocessor macros or compiler directives that I can add to the source code so that a warning will be thrown should user code attempt to invoke one of these deprecated (and soon-to-be-removed) functions?

Thanks.

2

Here you go:
https://en.cppreference.com/w/cpp/language/attributes/deprecated

This is a relatively recent advancement so it's possible that not all toolchains will support it. You might check this code used to deprecate the Arduino binary macros:

(but note the waters are a bit muddied there because it also needs to check for the standard versions that have binary literals and deprecated enums.

3

At least for gcc/g++: attribute ((deprecated))

4

Perfect. Works well at least for ESP32 toolchain. Will try others. Thanks.

5

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