Quickstart

This quickstart guide uses the same steps stated at Yocto Project Quick Build with additional steps to get an erlang runtime up and running on the target device.

Clone meta-erlang and checkout branch scarthgap:

git clone --branch scarthgap https://github.com/meta-erlang/meta-erlang.git

Clone poky and checkout branch scarthgap:

git clone --branch scarthgap git://git.yoctoproject.org/poky

Clone meta-openembedded and checkout branch scarthgap:

git clone --branch scarthgap https://github.com/openembedded/meta-openembedded.git

Move to poky directory:

cd poky

Initialize the build environment:

source oe-init-build-env ../build

Add meta-oe and meta-erlang to conf/layer.conf:

bitbake-layers add-layer ../meta-openembedded/meta-oe
bitbake-layers add-layer ../meta-erlang

Add erlang package to IMAGE_INSTALL in conf/local.conf

echo 'IMAGE_INSTALL:append = " erlang"' >> conf/local.conf

Build the core-image-minimal:

bitbake core-image-minimal

Run the qemu:

runqemu qemux86-64

A new window will open. Login as root and call erl:

# erl
Erlang/OTP 25 [erts-13.2.2.5] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [jit:ns]

Eshell V13.2.2.5  (abort with ^G)
1> erlang:system_info(cpu_topology).
[{processor,[{core,{logical,0}},
             {core,{logical,1}},
             {core,{logical,2}},
             {core,{logical,3}}]}]

The other sections of this guide shows additional steps to create your own erlang application and run inside a custom image.