% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
%   http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.


HaveDreyfus = code:lib_dir(dreyfus) /= {error, bad_name}.

if not HaveDreyfus -> CONFIG; true ->
    CurrOpts = case lists:keyfind(erl_opts, 1, CONFIG) of
        {erl_opts, Opts} -> Opts;
        false -> []
    end,
    NewOpts = [{d, 'HAVE_DREYFUS'} | CurrOpts],
    lists:keystore(erl_opts, 1, CONFIG, {erl_opts, NewOpts})
end.