Fix potential issue with VWI solver if IncNS solver not enabled

solvers/ADRSolver/CMakeLists.txt

@@ -7,7 +7,7 @@ IF (NOT NEKTAR_BUILD_SOLVERS)
 ENDIF()
 
 IF( NEKTAR_SOLVER_ADR )
-    SET(ADRSolverSource
+    ADD_SOLVER_EXECUTABLE(ADRSolver SOURCES
         ./ADRSolver.cpp 
         ./EquationSystems/Helmholtz.cpp
         ./EquationSystems/Laplace.cpp
@@ -22,8 +22,6 @@ IF( NEKTAR_SOLVER_ADR )
         ./EquationSystems/UnsteadyViscousBurgers.cpp
         ./EquationSystems/EigenValuesAdvection.cpp)
 
-    ADD_SOLVER_EXECUTABLE(ADRSolver SOURCES ${ADRSolverSource})
-
     # 1D discontinuous advection (weak DG/flux reconstruction)
     ADD_NEKTAR_TEST(Advection1D_FRDG_GLL_LAGRANGE_SEM LENGTHY)
     ADD_NEKTAR_TEST(Advection1D_FRDG_GAUSS_LAGRANGE)

solvers/VortexWaveInteraction/CMakeLists.txt

 CMAKE_DEPENDENT_OPTION(NEKTAR_SOLVER_VORTEXWAVE
     "Build the Vortex-Wave interaction solver." ON
-    "NEKTAR_BUILD_SOLVERS" OFF)
+    "NEKTAR_BUILD_SOLVERS;NEKTAR_SOLVER_INCNAVIERSTOKES" OFF)
 
-IF (NOT NEKTAR_BUILD_SOLVERS)
+IF (NOT NEKTAR_BUILD_SOLVERS OR NOT NEKTAR_SOLVER_INCNAVIERSTOKES)
     SET(NEKTAR_SOLVER_VORTEXWAVE OFF CACHE INTERNAL "")
 ENDIF()
 
@@ -19,7 +19,6 @@ IF( NEKTAR_SOLVER_VORTEXWAVE )
        ../ADRSolver/EquationSystems/SteadyAdvectionDiffusion.cpp
        ../ADRSolver/EquationSystems/SteadyAdvectionDiffusionReaction.cpp
        ./CalcL2ToLinfPressure.cpp
-       ./VortexWaveInteraction.h
        ./VortexWaveInteraction.cpp 
        $<TARGET_OBJECTS:IncNavierStokesSolver-obj>
        )