improve CI Analyser

.github/workflows/test-library.yml

@@ -182,13 +182,19 @@ jobs:
         env:
           CXX: clang++-14
           CC: clang-14
-        run: | # Retrieve warnings generated but not the ones of OpenMM
+        run: |
           scan-build-14 --use-cc=clang-14 --use-c++=clang++-14 cmake -P devel-tools/build_test_library.cmake 2>&1 | tee build_analyser.log; \
+          grep "CMake Error" build_analyser.log > build_errors.log; \
+          if [ -s build_errors.log ] ; then echo "Found compiler errors during build"; cat build_analyser.log; exit 1; fi
+
+      - name: Analyze logs
+        run: | # Retrieve warnings generated but not the ones of OpenMM
           awk '/warning/,/warning.*generated|^$/' build_analyser.log | awk '!/openmm.*warning/,/warning.*generated|^$/' | tee warnings_analyser.log; \
           if [ -s warnings_analyser.log ] ; then echo "Found compiler warning during build"; cat warnings_analyser.log; exit 1; fi
 
       - name: Archive warnings artifacts
         uses: actions/upload-artifact@v3
+        if: failure()
         with:
           name: warnings_analyser
           path: warnings_analyser.log