问题
I am new to Erlang, I have been trying to install Erlang and ejabberd on EC2 ubuntu machine, everything went well till I started compiling some external modules in ejabberd. It started throwing error "undefined parse transform 'lager_transform'". I tried everything which is as below :
- Did rebar get-deps, make clean, make deps, make install. After this I am able to see that lager_transform.beam is made and present in //lib/ folder.
- Checked rebar.config file, it had lager deps on top, which is widely suggested, no help even after that.
- Added
-compile[{parse_tranform},{lager_transform}]on top of module, even then their is no luck.
I am really blocked on this, and not able to complete the installation. I have done this before on fedora with ejabberd 15.11 and otp 18.2, at that time it was using p1_logger instead of lager. But now when I am installing fresh with otp 18.2 and ejabberd 16.0 or 15.11, I am getting lager_transform undefined error.
Please suggest and help
回答1:
Please make sure you compile ejabberd as described in documentation: http://docs.ejabberd.im/admin/guide/installation/#installing-ejabberd-from-source-code
For example, you can compile it with:
./configure --enable-lager --enable-mysql
make
You need to run configure and make to set properly the build chain.
来源：https://stackoverflow.com/questions/35144794/ejabberd-and-erlang-installation-with-lager-transform-undefined