We assume that you have already installed and ran Docker and cloned ev3dev-c library, so you are ready to build a Docker image. You should use the Dockerfile from the "ev3dev-c/docker/" directory, which is referring to the ev3dev cross-compiler image but also installs "swig3.0" and "python-dev" packages:
cd /PATH/TO/ev3dev-c/docker/
docker build --rm -t ev3cc .
Once ev3cc image is built, you can compile the library, examples and your programs using Docker. First, run a new Docker container, for example:
docker run --rm -it -h ev3 -v /PATH/TO/ev3dev-c/:/home/robot/ev3dev-c -w /home/robot/ev3dev-c ev3cc /bin/bash
Before that, in case you are using MinGW MSYS, you may need to execute:
export MSYS_NO_PATHCONV=1
You have to take into account that, by default, the preprocessing stage
is skipping when compilation is performed on the brick or using Docker.
Please set SKIP_PP = 0 in the makefile to allow preprocessing anywhere.
After that, inside the container, you are able to compile and install static and shared libraries:
cd source/ev3/
make
sudo make install
make shared
sudo make shared-install
That's all, now you can try to compile one of the examples:
cd ../../eg/hello/
make
See also – "Using Docker to Cross-Compile"