On Wed Jan 17 18:57:46 2018, isc-bind@trinnet.net wrote:
> > => which system and more important which compiler?
> 
> Don't laugh (I did say this was legacy but this has never been an issue 
> with all the Bind releases I've built on this machine:

=> it is not so old. I was afraid it was a SuOS 4.1.x which
now is really very old.... I used a lot this system.

> $ cat /etc/redhat-release
> Linux Mandrake release 7.0 (Air)
> 
> $ gcc -v
> Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux/2.95.2/specs
> gcc version 2.95.2 19991024 (release)

=> so a < 3.1. If I assume no major feature as attributes
where added in a revision I have the version to check for.

> Nope.. that file isn't present:
> --
> trinity3:/usr/src/archive/dns/bind-9.11.2-P1$ ls -la 
> lib/isc/include/isc/deprecated.h
> ls: lib/isc/include/isc/deprecated.h: No such file or directory

=> it is in the v9_11 branch but seems not very old.
Anyway the ISC_DEPRECATED macro should be define somewhere
and if you can't find it you get only warnings...