hartmannathan commented on PR #12786:
URL: https://github.com/apache/nuttx/pull/12786#issuecomment-2256725340
> > > Avoid creating Kconfig entrypoint and just create the macro and
include some info that it will be deprecated and the developers should use
capture_initialize()
> >
> >
> > Agreed, but how do we make a noticeable warning (at build-time) that the
deprecated API is used? It would be best if messages could be printed at end of
compile output.
>
> There is a deprecated attribute, it is used on Linux kernel.
>
> We could create it for NuttX as well:
>
> ```
> #ifdef __GNUC__
> #define __deprecated __attribute__((deprecated))
> #else
> #define __deprecated
> #endif
> ```
>
> So we just add:
>
> ```
> void old_function(void) __deprecated;
>
> void old_function(void)
> {
> // implementation
> }
> ```
@acassis thank you!
I looked up attribute __deprecated and found this StackOverflow answer which
covers GCC, Clang, and MSVC:
https://stackoverflow.com/a/21265197
tl;dr GCC and Clang use __attribute__((deprecated)) (but we should check for
__GNUC__ || __clang__) while MSVC uses __declspec(deprecated).
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