How to verify some macro is available for a specific version of GLIBC that is installed on my PC?

[孙世龙 sunshilong]

Thank you for your clarification.

>You can read the glibc source code.
No other methods? Maybe it's meaningful(or faster) when verifying when
a specific macro is first introduced then reading each version source
code.

>__MALLOC_HOOK_VOLATILE is an internal macro and should only be used
>within glibc itself.  It can go away at any time.
Do you indicate that the said macro could not be found in the headers of GLIBC?

Best Regards
Sunshilong

On Sun, Aug 16, 2020 at 6:08 PM Florian Weimer <fw@deneb.enyo.de> wrote:
>
> * 孙世龙 sunshilong via Libc-help:
>
> > How can I verify some macro is available for a specific version of
> > GLIBC that is installed on my PC, e.g:__MALLOC_HOOK_VOLATILE?
>
> You can read the glibc source code.
>
> __MALLOC_HOOK_VOLATILE is an internal macro and should only be used
> within glibc itself.  It can go away at any time.