Allwmake -update: Further improvements to handle source-tree/dep file inconsistencies after git pull

Patch contributed by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2091

src/parallel/decompose/Allwclean

@@ -0,0 +1,61 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Parse arguments for library compilation
+targetType=libso
+. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+
+# get SCOTCH_VERSION, SCOTCH_ARCH_PATH
+if settings=`$WM_PROJECT_DIR/bin/foamEtcFile config.sh/scotch`
+then
+    . $settings
+    echo "using SCOTCH_ARCH_PATH=$SCOTCH_ARCH_PATH"
+else
+    echo
+    echo "Error: no config.sh/scotch settings"
+    echo
+fi
+
+
+#
+# define how to clean an mpi-versioned library
+#
+wcleanMpiLib()
+{
+    set +x
+    for libName
+    do
+    (
+        WM_OPTIONS="$WM_OPTIONS$WM_MPLIB"
+        whichmpi="$WM_PROJECT_DIR/platforms/$WM_OPTIONS/src/parallel/decompose/$libName/using:$FOAM_MPI"
+        whichscotch="$WM_PROJECT_DIR/platforms/$WM_OPTIONS/src/parallel/decompose/$libName/using:$SCOTCH_VERSION"
+        wclean $targetType $libName
+    )
+    done
+    set -x
+}
+
+set -x
+
+if [ -n "$SCOTCH_ARCH_PATH" ]
+then
+    wclean scotchDecomp
+
+    if [ -d "$FOAM_LIBBIN/$FOAM_MPI" ]
+    then
+        wcleanMpiLib ptscotchDecomp
+    fi
+else
+    echo
+    echo "Skipping scotchDecomp (ptscotchDecomp)"
+    echo
+fi
+
+
+wclean metisDecomp
+
+wclean decompositionMethods
+
+wclean decompose
+
+#------------------------------------------------------------------------------