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Please note that this documentation is not complete, we are working on finishing it.

Building a toolchain for anything OpenEmbedded supports

When you have installed bitbake and openembedded you can build the package meta-toolchain to get a toolchain for that architecture.

Building Erlang

Make sure to have a valid toolchain in your $PATH, in the EmbErl.sh script there is a variable named $HOST. The toolchain should have its binaries named ${HOST}-command. Example for HOST=arm: gcc should be arm-gcc and be available in your $PATH.

We have used the toolchain that is built by openembedded when building our things.

./EmbErl.sh -<opts>

Available opts are:
-s          Strip beam files and compile with the slim flag
-S          Stip binaries with the strip-tool
-c          Compile beams using the compress flag
-C          Compress applications into zip's
-o <arg>    Compile the virtual machine with the <arg> optimization flag
-H <arg>    Compile the virtual machine for the host <arg>
-h          Display help message 

To use another Erlang version than the one that EmbErl.sh uses as default, change the VERSION variable (eg VERSION=R14B01 ./EmbErl.sh <arguments>). One can also set the variable TARGET_ERL_ROOT=path to change the location in which Erlang will be installed.

Generate package

Please note that generating a package is intedend to be used to create a installation package as the ones we release on embedded-erlang.com. There is no reason to do this step if you just want erlang to be built for a different architecture.

Use the CreatePackage.sh script in order to create a package. If you did specify TARGET_ERL_ROOT in the build step you should do it for the package generation as well (eg TARGET_ERL_ROOT=path ; ./CreatePackage.sh)

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