getting tests running with docker

Hi there, As the release managers of PHP 7.3 have been chosen - congratulations to both - I realized I have to hurry up with the implementation of the passed RFC on Same Site Cookies. A few weeks ago I was ready to start working on this. So I started with setting up my dev environment. I chose to go for a containerized setup: create a container that is ready to run tests, then mount the git repo, see that the tests are running and then start working on the feature. However, I never managed to get a single test running. My starting point was the official Docker based on Alpine 3.7 (https://github.com/docker-library/php/blob/master/7.2/alpine3.7/cli/Dockerfile). However, when compiling PHP I always run into the same error. |Error relocating /usr/src/php/sapi/cli/php: unsupported relocation type 37 Error relocating /usr/src/php/sapi/cli/php: unsupported relocation type 37 Error relocating /usr/src/php/sapi/cli/php: unsupported relocation type 37 Error relocating /usr/src/php/sapi/cli/php: unsupported relocation type 37 | Do anyone has a clue what this could this be? I have very little experience with these kind of issues. Googling did not help to find the answer. Maybe someone can help, or even better, setup a Docker that is able to a) compile using travis/compile.sh and then b) run ./sapi/cli/php run-tests.php c) when mounting a (forked) git src repo into that container. I think this will improve dev experience of other people that want to help improving php source. Kind regards, Frederik Bosch