CONFIG: export ThirdParty Qt5_DIR (issue #827)

etc/config.csh/example/paraview

@@ -13,8 +13,8 @@
 #     config.csh/example/paraview
 #
 # Description
-#     Example of defining a different ParaView_VERSION but retaining
-#     the standard config.csh/paraview mechanism
+#     Example of defining a different ParaView_VERSION but retaining the
+#     standard config.csh/paraview mechanism
 #
 # Note
 #     This file could be copied to a user or site location, but should never
@@ -25,7 +25,8 @@
 
 set pv=5.5.0
 set pv=5.5.0-mpipy
+set qt=qt-5.9.0
 
-eval `foamEtcFile -csh -config -mode=o paraview -- ParaView_VERSION=$pv`
+eval `foamEtcFile -csh -config -mode=o paraview -- ParaView_VERSION=$pv ParaView_QT=$qt`
 
 #------------------------------------------------------------------------------

etc/config.csh/paraview

@@ -120,8 +120,16 @@ if ( $?ParaView_VERSION ) then
         #OBSOLETE? endif
 
         # QT libraries as required
+        # Set Qt5_DIR to root directory.
+        # Another possibility: "qtpaths --qt-version"
+
         set qtDir="$archDir/$ParaView_QT"
         if ( -d "$qtDir" ) then
+            switch ($ParaView_QT)
+            case *-qt*:
+                setenv Qt5_DIR $qtDir
+                breaksw
+            endsw
             foreach qtLibDir ("$qtDir/lib$WM_COMPILER_LIB_ARCH" "$qtDir/lib")
                 if ( -d "$qtLibDir" ) then
                     setenv LD_LIBRARY_PATH "${qtLibDir}:${LD_LIBRARY_PATH}"

etc/config.csh/unset

@@ -111,6 +111,7 @@ unsetenv ParaView_INCLUDE_DIR
 unsetenv ParaView_VERSION
 unsetenv PV_PLUGIN_PATH
 unsetenv VTK_DIR
+unsetenv Qt5_DIR  # Perhaps only unset if it is in WM_THIRD_PARTY_DIR?
 
 #------------------------------------------------------------------------------
 # Unset other ThirdParty environment variables