EclGenericOutputBlackoilModule: move destructor definition to compile unit

ebos/eclgenericoutputblackoilmodule.cc

@@ -141,6 +141,10 @@ EclGenericOutputBlackoilModule(const EclipseState& eclState,
     }
 }
 
+template<class FluidSystem, class Scalar>
+EclGenericOutputBlackoilModule<FluidSystem,Scalar>::
+~EclGenericOutputBlackoilModule() = default;
+
 template<class FluidSystem, class Scalar>
 void EclGenericOutputBlackoilModule<FluidSystem,Scalar>::
 outputCumLog(size_t reportStepNum, const bool substep, bool forceDisableCumOutput)

ebos/eclgenericoutputblackoilmodule.hh

@@ -209,7 +209,7 @@ public:
     }
 
     // Virtual destructor for safer inheritance.
-    virtual ~EclGenericOutputBlackoilModule() = default;
+    virtual ~EclGenericOutputBlackoilModule();
 
 protected:
     using ScalarBuffer = std::vector<Scalar>;