~= fix build

8 jobs for develop in 1 minute and 27 seconds (queued for 2 seconds)
Name Stage Failure
test:prrt_functional Test There is an unknown failure, please try again
Updating/initializing submodules recursively...
Submodule 'prrt/xlap' (https://gitlab-ci-token:xxxxxxxxxxxxxxxxxxxx@git.nt.uni-saarland.de/as/X-Lap.git) registered for path 'prrt/xlap'
Cloning into '/home/gitlab-runner/builds/3a5409e2/1/LARN/PRRT/prrt/xlap'...
Submodule path 'prrt/xlap': checked out 'b87b0b7953c279c4acde42f2b3535c309048d8ab'
Downloading artifacts for build:prrt (10883)...
Downloading artifacts from coordinator... ok
id=10883 responseStatus=200 OK token=jBYHwnaz
$ CC=gcc-5 CXX=g++-5 cmake . -DPRRT_TESTS=1
CMake Error: The current CMakeCache.txt directory /home/gitlab-runner/builds/3a5409e2/1/LARN/PRRT/CMakeCache.txt is different than the directory /home/gitlab-runner/builds/3a5409e2/0/LARN/PRRT where CMakeCache.txt was created. This may result in binaries being created in the wrong place. If you are not sure, reedit the CMakeCache.txt
ERROR: Job failed: exit status 1