Allow vtkm errors to properly work with shared libraries.

vtkm/cont/Error.h

@@ -34,7 +34,7 @@ namespace cont {
 
 /// The superclass of all exceptions thrown by any VTKm function or method.
 ///
-class Error : public std::exception
+class VTKM_ALWAYS_EXPORT Error : public std::exception
 {
 public:
 //See note about GetMessage macro below.

vtkm/cont/ErrorControl.h

@@ -28,7 +28,7 @@ namespace cont {
 /// The superclass of all exceptions thrown from within the VTKm control
 /// environment.
 ///
-class ErrorControl : public vtkm::cont::Error
+class VTKM_ALWAYS_EXPORT ErrorControl : public vtkm::cont::Error
 {
 protected:
   ErrorControl() { }

vtkm/cont/ErrorControlBadAllocation.h

@@ -28,7 +28,7 @@ namespace cont {
 /// This class is thrown when VTK-m attempts to manipulate memory that it should
 /// not.
 ///
-class ErrorControlBadAllocation : public ErrorControl
+class VTKM_ALWAYS_EXPORT ErrorControlBadAllocation : public ErrorControl
 {
 public:
   ErrorControlBadAllocation(const std::string &message)

vtkm/cont/ErrorControlBadType.h

@@ -28,7 +28,7 @@ namespace cont {
 /// This class is thrown when VTK-m encounters data of a type that is
 /// incompatible with the current operation.
 ///
-class ErrorControlBadType : public ErrorControl
+class VTKM_ALWAYS_EXPORT ErrorControlBadType : public ErrorControl
 {
 public:
   ErrorControlBadType(const std::string &message)

vtkm/cont/ErrorControlBadValue.h

@@ -28,7 +28,7 @@ namespace cont {
 /// This class is thrown when a VTKm function or method encounters an invalid
 /// value that inhibits progress.
 ///
-class ErrorControlBadValue : public ErrorControl
+class VTKM_ALWAYS_EXPORT ErrorControlBadValue : public ErrorControl
 {
 public:
   ErrorControlBadValue(const std::string &message)

vtkm/cont/ErrorControlInternal.h

@@ -29,7 +29,7 @@ namespace cont {
 /// be reached. This error usually indicates a bug in vtkm or, at best, VTKm
 /// failed to detect an invalid input it should have.
 ///
-class ErrorControlInternal : public ErrorControl
+class VTKM_ALWAYS_EXPORT ErrorControlInternal : public ErrorControl
 {
 public:
   ErrorControlInternal(const std::string &message)

vtkm/cont/ErrorExecution.h

@@ -28,7 +28,7 @@ namespace cont {
 /// This class is thrown in the control environment whenever an error occurs in
 /// the execution environment.
 ///
-class ErrorExecution : public vtkm::cont::Error
+class VTKM_ALWAYS_EXPORT ErrorExecution : public vtkm::cont::Error
 {
 public:
   ErrorExecution(const std::string message)

vtkm/cont/cuda/ErrorControlCuda.h

@@ -70,7 +70,7 @@ namespace cuda {
 /// This error is thrown whenever an unidentified CUDA runtime error is
 /// encountered.
 ///
-class ErrorControlCuda : public vtkm::cont::ErrorControl
+class VTKM_ALWAYS_EXPORT ErrorControlCuda : public vtkm::cont::ErrorControl
 {
 public:
   ErrorControlCuda(cudaError_t error)

vtkm/io/ErrorIO.h

@@ -25,7 +25,7 @@
 namespace vtkm {
 namespace io {
 
-class ErrorIO : public vtkm::cont::Error
+class VTKM_ALWAYS_EXPORT ErrorIO : public vtkm::cont::Error
 {
 public:
   ErrorIO() { }