GitHub user iilyak opened a pull request:
https://github.com/apache/couchdb/pull/348
Define OTP_VSN/OTP_RELEASE/HAS_CALLBACKS macro
We define HAS_CALLBACKS feature macro in order to make `dialyzer`
happy. OTP releases prior to 15 require defining `behaviour_info` instead
of a `callback` attribute. New macro could be used to make conditional
compilation as follows:
```
-ifdef(HAS_CALLBACKS).
-callback app() -> atom().
-else.
-export([behaviour_info/1]).
behaviour_info(callbacks) ->
[
{app, 0}
];
behaviour_info(_) ->
undefined.
-endif.
```
The same approach could be used to eliminate the cost of
`erlang:function_exported` in `couch_crypto.erl`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloudant/couchdb set_features
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/couchdb/pull/348.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #348
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