Populate CXXCOMPILER

Author: DennisOSRM

.github/workflows/osrm-backend.yml

@@ -217,7 +217,7 @@ jobs:
     env:
       BUILD_TYPE: ${{ matrix.type }}
       CCOMPILER: ${{ matrix.compiler }}
-      CXXCOMPILER: ${{ startsWith(matrix.compiler, 'gcc') && format('g++-{0}', matrix.compiler) || contains(matrix.compiler, 'clang-') && format('clang++{0}', matrix.compiler) || matrix.compiler }}
+      CXXCOMPILER: ${{ startsWith(matrix.compiler, 'gcc') && format('g++-{0}', replace(matrix.compiler, 'gcc-', '')) || startsWith(matrix.compiler, 'clang-') && format('clang++-{0}', replace(matrix.compiler, 'clang-', '')) || matrix.compiler }}
       CXXFLAGS: ${{ matrix.flags }}
       ENABLE_COVERAGE: ${{ matrix.coverage && 'ON' || 'OFF' }}
       ENABLE_SANITIZER: ${{ matrix.sanitizer && 'ON' || 'OFF' }}