Fixed OpenMP builds, remove Mac builds from the actions.

Not sure how to get HDF5 without pulling down homebrew.

.github/workflows/run-tests.yaml

@@ -20,31 +20,22 @@ jobs:
             os: ubuntu-latest,
             cov: true
           }
-        - {
-            name: "macOS Latest Clang", 
-            os: macos-latest
-          }
 
     steps:
     - uses: actions/checkout@v1
 
     - name: Get latest CMake
       uses: lukka/get-cmake@latest
 
-    - name: Configure the build for Mac
-      if: ${{ matrix.config.os == 'macos-latest' }}
-      run: cmake -S . -B build
-
     - name: Install HDF5
-      if: ${{ matrix.config.os == 'ubuntu-latest' }}
       run: sudo apt-get install libhdf5-dev
 
     - name: Configure the build with coverage
-      if: ${{ matrix.config.os == 'ubuntu-latest' && matrix.config.cov }}
+      if: ${{ matrix.config.cov }}
       run: cmake -S . -B build -DCODE_COVERAGE=ON 
 
     - name: Configure the build with OpenMP
-      if: ${{ matrix.config.os == 'ubuntu-latest' && matrix.config.omp }}
+      if: ${{ matrix.config.omp }}
       run: cmake -S . -B build -DUSE_OPENMP=ON
 
     - name: Run the build

tests/CMakeLists.txt

@@ -37,8 +37,11 @@ if (NOT HAVE_CXX_FS)
     target_link_libraries(cusparh5test stdc++fs) 
 endif()
 
+# Checking whether to add OpenMP support. This is turned off
+# by default to make it easier to debug test failures.
+set(USE_OPENMP OFF CACHE BOOL "Compile with OpenMP support")
 if (USE_OPENMP)
-    # Assume that the package has already been found.
+    find_package(OpenMP REQUIRED)
     target_link_libraries(h5test OpenMP::OpenMP_CXX)
 endif()