added gitlab CI config

# vim: tabstop=4 shiftwidth=4 softtabstop=4

before_script:

    - which g++

    - which cmake

    - which make

# Stages are useful only to enforce some ordering of the jobs. Every job is run

# in its own directory and only very few data can be shared between the jobs in

# different stages. It has to be zipped and uploaded to the server, so we can't

# do it with the build directory. Hence, we must build, test and install in the

# same job.

stages:

    - build

my build job:

    stage: build

    script:

        - export CTEST_OUTPUT_ON_FAILURE=1

        - export CTEST_PARALLEL_LEVEL=4

        - mkdir -p "./builddir/$CI_JOB_NAME"

        - pushd "./builddir/$CI_JOB_NAME"

        - cmake ../..

        - make all

        - make test

        - popd