rebar.config

{erl_opts, [
    % Erlang releases after 17 don't put R in front of their name, and also
    % require dict() to be written like dict:dict()
    {platform_define, "^R", non_namespaced_types}, % used by meck
    {platform_define, "^[0-9]+", namespaced_types} % used by hamcrest
]}.

{profiles, [
    {test, [
        {erl_opts, [
            debug_info,
            {platform_define, "^R(?!16B03)", cover_empty_compile_opts}
        ]},
        {cover_enabled, true},
        {cover_opts, [verbose]}
    ]},
    {compile, [
        {erl_opts, [
            debug_info,
            warnings_as_errors,
            warn_export_all,
            warn_export_vars,
            warn_shadow_vars,
            warn_obsolete_guard,
            warn_unused_import
        ]}
    ]}
]}.