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.
I used to library project on GitHub as a guide:
https://github.com/tuncer/re2
My project is here:
https://github.com/project-z/emutton/
When I do a rebar compile && rebar eunit
, I get a failure in the eunit test because it cannot find emtn.so
:
$ 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
When I call rebar compile
, it is only producing a single driver file, emtn_drv.so
and no emtn.so
:
$ tree priv
priv
└── emtn_drv.so
0 directories, 1 file
I have an echo statement in c_src/build_deps.sh
that I don't see output when I call rebar clean
. It seems to behave as though my pre_hook
and post_hook
in rebar.config
are completely ignored:
{pre_hooks, [{compile, "c_src/build_deps.sh"}]}.
{post_hooks, [{clean, "c_src/build_deps.sh clean"}]}.
Examples of no output shown from rebar
:
$ rebar compile
==> emutton (compile)
$ rebar clean
==> emutton (clean)
Because I have cloned tuncer's RE2 bindings project and when I do a rebar compile
see output from his build_deps.sh script. The permissions on mine match those on his:
-rwxr-xr-x 1 ajl staff 891B Jun 25 12:30 c_src/build_deps.sh
Any idea what I'm missing here? I believe that rebar is configured correctly to call out to the script and do the compilation.