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POHow do you setup an Erlang NIF project with rebar?
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copied!<p>I looked through the questions here on StackOverflow and Googled around for an example of setting up a Basic NIF project in rebar for wrapping a C++ library. </p> <p>I used to library project on GitHub as a guide: </p> <p><a href="https://github.com/tuncer/re2" rel="nofollow">https://github.com/tuncer/re2</a></p> <p>My project is here: </p> <p><a href="https://github.com/project-z/emutton/" rel="nofollow">https://github.com/project-z/emutton/</a></p> <p>When I do a <code>rebar compile && rebar eunit</code>, I get a failure in the eunit test because it cannot find <code>emtn.so</code>: </p> <pre><code>$ rebar compile && rebar eunit ==> emutton (compile) ==> emutton (eunit) undefined *** test module not found *** **emtn =ERROR REPORT==== 25-Jun-2013::12:21:55 === The on_load function for module emtn returned {error, {load_failed, "Failed to load NIF library: 'dlopen(/.../source/emutton/priv/emtn.so, 2): image not found'"}} ======================================================= Failed: 0. Skipped: 0. Passed: 0. One or more tests were cancelled. ERROR: One or more eunit tests failed. ERROR: eunit failed while processing /.../source/emutton: rebar_abort </code></pre> <p>When I call <code>rebar compile</code>, it is only producing a single driver file, <code>emtn_drv.so</code> and no <code>emtn.so</code>: </p> <pre><code>$ tree priv priv └── emtn_drv.so 0 directories, 1 file </code></pre> <p>I have an echo statement in <code>c_src/build_deps.sh</code> that I don't see output when I call <code>rebar clean</code>. It seems to behave as though my <code>pre_hook</code> and <code>post_hook</code> in <code>rebar.config</code> are completely ignored: </p> <pre><code>{pre_hooks, [{compile, "c_src/build_deps.sh"}]}. {post_hooks, [{clean, "c_src/build_deps.sh clean"}]}. </code></pre> <p>Examples of no output shown from <code>rebar</code>: </p> <pre><code>$ rebar compile ==> emutton (compile) $ rebar clean ==> emutton (clean) </code></pre> <p>Because I have cloned tuncer's RE2 bindings project and when I do a <code>rebar compile</code> see output from his build_deps.sh script. The permissions on mine match those on his: </p> <pre><code>-rwxr-xr-x 1 ajl staff 891B Jun 25 12:30 c_src/build_deps.sh </code></pre> <p>Any idea what I'm missing here? I believe that rebar is configured correctly to call out to the script and do the compilation. </p>

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