Unable to compile gleam_otp in a Phoenix app

[MattCheely]

When incorporating gleam_otp into a Phoenix application, the library fails to compile. This isn't a big deal for me, as I have a workaround for now, and it's for a personal side project that currently only runs on my dev machine.

Compile output

➜ mix compile
===> Rebar3 detected a lock file from a newer version. It will be loaded in compatibility mode, but important information may be missing or lost. It is recommended to upgrade Rebar3.
===> Compiling gleam_otp
===> Compiling src/gleam_otp_external.erl failed
src/gleam_otp_external.erl:14: can't find include file "gen/src/gleam@otp@process_Sender.hrl"
src/gleam_otp_external.erl:15: can't find include file "gen/src/gleam@otp@process_Exit.hrl"
src/gleam_otp_external.erl:16: can't find include file "gen/src/gleam@otp@process_PortDown.hrl"
src/gleam_otp_external.erl:17: can't find include file "gen/src/gleam@otp@process_ProcessDown.hrl"
src/gleam_otp_external.erl:18: can't find include file "gen/src/gleam@otp@process_StatusInfo.hrl"

src/gleam_otp_external.erl:119: record process_down undefined
src/gleam_otp_external.erl:122: record port_down undefined
src/gleam_otp_external.erl:125: record exit undefined
src/gleam_otp_external.erl:194: record sender undefined
src/gleam_otp_external.erl:207: record status_info undefined
src/gleam_otp_external.erl:210: variable 'Debug' is unbound
src/gleam_otp_external.erl:210: variable 'Mode' is unbound
src/gleam_otp_external.erl:210: variable 'Parent' is unbound
src/gleam_otp_external.erl:212: variable 'Mode' is unbound
src/gleam_otp_external.erl:212: variable 'Parent' is unbound
src/gleam_otp_external.erl:212: variable 'State' is unbound
src/gleam_otp_external.erl:214: variable 'Mod' is unbound

src/gleam_otp_external.erl:118: Warning: variable 'Pid' is unused
src/gleam_otp_external.erl:118: Warning: variable 'Reason' is unused
src/gleam_otp_external.erl:121: Warning: variable 'Port' is unused
src/gleam_otp_external.erl:121: Warning: variable 'Reason' is unused
src/gleam_otp_external.erl:124: Warning: variable 'Pid' is unused
src/gleam_otp_external.erl:124: Warning: variable 'Reason' is unused
src/gleam_otp_external.erl:192: Warning: variable 'Pid' is unused
src/gleam_otp_external.erl:193: Warning: variable 'Prepare' is unused

** (Mix) Could not compile dependency :gleam_otp, "/home/matt/.mix/rebar3 bare compile --paths /home/matt/projects/beam_ci/_build/dev/lib/*/ebin" command failed. You can recompile this dependency with "mix deps.compile gleam_otp", update it with "mix deps.update gleam_otp" or clean it with "mix deps.clean gleam_otp"

Other Notes

This happens when building with both gleam_compile and mix_gleam

Workaround

I've worked around this by copying gleam.toml from my local checkout of gleam_otp into the deps/gleam_otp folder and running rebar3 compile there. Once it's compile once, everything works.

[lpil]

It seems that header files are handled differently with mix than with rebar3. The build stuff is currently being rewritten so this should be fixed soon.

[jeffkreeftmeijer]

This also happens for me when running rebar3 compile in the test_project in https://github.com/jeffkreeftmeijer/shine, which is not an Elixir project. It’s resolved if I remove shine from the project_plugins in https://github.com/jeffkreeftmeijer/shine/blob/main/test_project/rebar.config#L8.

The workaround worked for me when I copied gleam.toml into test_project/_build/default/plugins/gleam_otp/ and then ran rebar3 compile, so I’m not blocked on this either. Thanks for mentioning that! 👍

[lpil]

As we've remake the Mix plugin I'm going to close this as being outdated. If you have further issues please open a new ticket, thank you