Fixing multi-path MPI include issue

When there are multiple include directories for MPI,
as happens on Ubuntu with openmpi, quoting the argument
to INCLUDE_DIRECTORIES causes both to be treated as
one path, and MPI includes cannot be found.

Examples/ParallelProcessing/Generic/Cxx/CMakeLists.txt

 INCLUDE_REGULAR_EXPRESSION("^(lex|vtk|png|j|Task|Pipe).*$")
 
 IF (VTK_USE_MPI)
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
   IF (MPI_LIBRARY) 
     SET(MPI_LIBRARIES ${MPI_LIBRARY})   
   ENDIF (MPI_LIBRARY)   

Infovis/Testing/Cxx/CMakeLists.txt

@@ -105,7 +105,7 @@ IF (VTK_USE_RENDERING AND VTK_USE_DISPLAY)
   ENDIF (VTK_USE_BOOST)
 
   IF(VTK_USE_PARALLEL AND VTK_USE_MPI)
-    INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+    INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
     IF (MPI_LIBRARY)
       SET(MPI_LIBRARIES ${MPI_LIBRARY})
     ENDIF (MPI_LIBRARY)

Parallel/CMakeLists.txt

@@ -151,7 +151,7 @@ ENDIF(VTK_USE_RENDERING)
 IF (VTK_USE_MPI)
   INCLUDE (FindMPI)
 
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
 
   SET ( Kit_SRCS
     ${Kit_SRCS}

Parallel/Testing/Cxx/CMakeLists.txt

@@ -62,7 +62,7 @@ IF(VTK_USE_DISPLAY AND VTK_USE_RENDERING)
   ENDIF(HAVE_SOCKETS)
 
   IF (VTK_USE_MPI)
-    INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+    INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
     IF (MPI_LIBRARY) 
       SET(MPI_LIBRARIES ${MPI_LIBRARY})   
     ENDIF (MPI_LIBRARY)   

Utilities/Cosmo/CMakeLists.txt

@@ -5,7 +5,7 @@ project(Cosmo)
 
 SET(Cosmo_LIBS)
 IF(VTK_USE_MPI)
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
   IF(MPI_EXTRA_LIBRARY)
     SET(Cosmo_LIBS ${MPI_LIBRARY} ${MPI_EXTRA_LIBRARY})
   ELSE(MPI_EXTRA_LIBRARY)

Utilities/VPIC/CMakeLists.txt

@@ -17,7 +17,7 @@ SET(VPIC_SOURCES
 )
 
 IF(VTK_USE_MPI)
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
   ADD_DEFINITIONS("-DUSE_PARALLEL_VPIC -DMPICH_IGNORE_CXX_SEEK")
 ENDIF(VTK_USE_MPI)
 

Utilities/mrmpi/CMakeLists.txt

 PROJECT (MAPREDUCE)
 
 IF (VTK_USE_MPI)
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
   ADD_DEFINITIONS("-DMPICH_IGNORE_CXX_SEEK")
   IF (MPI_LIBRARY)
     SET (mrmpi_LIBS "${MPI_LIBRARY}")

Wrapping/Python/CMakeLists.txt

@@ -273,7 +273,7 @@ ENDIF(VTK_USE_MATLAB_MEX)
 SET(PVTKPYTHON_EXECUTABLE)
 # Create the pvtkpython Python wrapper executable with MPI support.
 IF (VTK_USE_PARALLEL AND VTK_USE_MPI)
-  INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+  INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
   IF (MPI_LIBRARY)
     SET(MPI_LIBRARIES ${MPI_LIBRARY})
   ENDIF (MPI_LIBRARY)

Wrapping/Tcl/CMakeLists.txt

@@ -135,7 +135,7 @@ ENDIF(NOT VTK_INSTALL_NO_RUNTIME)
 # Create the pvtk Tcl wrapper executable with MPI support.
 IF (VTK_USE_PARALLEL)
   IF (VTK_USE_MPI)
-    INCLUDE_DIRECTORIES("${MPI_INCLUDE_PATH}")
+    INCLUDE_DIRECTORIES(${MPI_INCLUDE_PATH})
     IF (MPI_LIBRARY) 
       SET(MPI_LIBRARIES ${MPI_LIBRARY})   
     ENDIF (MPI_LIBRARY)