I'm trying to compile a module that uses the new xmpp library for ejabberd.
I've a very simple rebar.config file:
{deps, [
{xmpp, ".*", {git, "https://github.com/processone/xmpp", {tag, "1.1.4"}}}
]}.
When I try to run rebar3 eunit or rebar3 compile I get an error message:
$ rebar3 compile
===> Verifying dependencies...
===> Fetching xmpp ({git,"https://github.com/processone/xmpp",
{ref,"c010141487632db1666bcbf64f90f42c0fde50aa"}})
===> Fetching rebar3_hex ({pkg,<<"rebar3_hex">>,<<"3.1.0">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/rebar3_hex-3.1.0.tar
===> Compiling rebar3_hex
===> Fetching fast_xml ({pkg,<<"fast_xml">>,<<"1.1.18">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/fast_xml-1.1.18.tar
===> Fetching pc ({pkg,<<"pc">>,<<"1.4.0">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/pc-1.4.0.tar
===> Compiling pc
===> Fetching stringprep ({pkg,<<"stringprep">>,<<"1.0.7">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/stringprep-1.0.7.tar
===> Fetching p1_utils ({pkg,<<"p1_utils">>,<<"1.0.6">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/p1_utils-1.0.6.tar
===> Compiling p1_utils
===> Compiling fast_xml
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/fast_xml/c_src/fxml.c
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/fast_xml/c_src/fxml_stream.c
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/fast_xml/priv/lib/fxml.so
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/fast_xml/priv/lib/fxml_stream.so
===> Compiling stringprep
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/stringprep/c_src/stringprep.cpp
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/stringprep/priv/lib/stringprep.so
===> Compiling xmpp
===> Compiling _build/default/lib/xmpp/src/xmpp_util.erl failed
_build/default/lib/xmpp/include/xmpp.hrl:29: can't find include file "fxml.hrl"
However, when I compile this module separately, it works:
$ cd _build/default/lib/xmpp
$ rebar3 compile
===> Fetching rebar3_hex ({pkg,<<"rebar3_hex">>,<<"3.1.0">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/rebar3_hex-3.1.0.tar
===> Compiling rebar3_hex
===> Verifying dependencies...
===> Fetching fast_xml ({pkg,<<"fast_xml">>,<<"1.1.18">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/fast_xml-1.1.18.tar
===> Fetching pc ({pkg,<<"pc">>,<<"1.4.0">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/pc-1.4.0.tar
===> Compiling pc
===> Fetching stringprep ({pkg,<<"stringprep">>,<<"1.0.7">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/stringprep-1.0.7.tar
===> Fetching p1_utils ({pkg,<<"p1_utils">>,<<"1.0.6">>})
===> Downloaded package, caching at /Users/marcp/.cache/rebar3/hex/default/packages/p1_utils-1.0.6.tar
===> Skipping p1_utils (from {pkg,<<"p1_utils">>,<<"1.0.6">>,
<<"EF0951DDF38E92B7E479AF4B8DC950DF76AF8C1030432EF68B7FD7AD17C436FE">>}) as an app of the same name has already been fetched
===> Compiling p1_utils
===> Compiling fast_xml
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/fast_xml/c_src/fxml.c
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/fast_xml/c_src/fxml_stream.c
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/fast_xml/priv/lib/fxml.so
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/fast_xml/priv/lib/fxml_stream.so
===> Compiling stringprep
===> Compiling /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/stringprep/c_src/stringprep.cpp
===> Linking /Users/marcp/Desktop/erlang-test/myapp/_build/default/lib/xmpp/_build/default/lib/stringprep/priv/lib/stringprep.so
===> Compiling xmpp
How can I find out what's going on? Is the rebar.config.script of the xmpp library to blame?
It turns out the xmpp cannot be compiled with rebar3 out of the box. I've opened an issue on GitHub.
As a workaround adding the following to my rebar.config file worked:
{overrides, [
{add, xmpp, [{erl_opts, [{i, "_build/default/lib/fast_xml/include"}]}]}
]}.