Add matrix of tests

.gitlab-ci.yml

@@ -24,13 +24,15 @@ docker-base:
       - docker/Dockerfile
 
 .build_das6:
+  variables:
+    COMPILER_VERSION: 12.2.0
   before_script:
-    - module load spack/12.2.0
+    - module load spack/${COMPILER_VERSION}
     - module load cmake
     - module load boost
     - module load casacore
-    - cmake -B build . -DCMAKE_BUILD_TYPE=Release
-    - make -C build -j
+    - cmake -B build-${COMPILER_VERSION} . -DCMAKE_BUILD_TYPE=Release
+    - make -C build-${COMPILER_VERSION} -j
 
 .build_docker:
   image: "$CI_REGISTRY_IMAGE:latest"
@@ -56,13 +58,18 @@ unittests:
     - build/unittests
 
 collect-performance:   # This job runs in the test stage.
+  parallel:
+    matrix:
+      - COMPILER_VERSION:
+        - 9.4.0
+        - 12.2.0
   tags:
     - das6-gpu
   stage: benchmark    # It only starts when the job in the build stage completes successfully.  
   extends:
   - .build_das6
   script:
-    - build/microbenchmarks --benchmark_out=results.json --benchmark_out_format=json
+    - build-${COMPILER_VERSION}/microbenchmarks --benchmark_out=results-${COMPILER_VERSION}.json --benchmark_out_format=json
   artifacts:
     paths:
       - ./results*.json