Configure wrapper now deletes previous CMake cache

configure

@@ -189,21 +189,9 @@ done
 if [ -d $builddir ]; then
     # If build directory exists, check if it has a CMake cache
     if [ -f $builddir/CMakeCache.txt ]; then
-        # If the Cmake cache exists, then check that it thinks
-        # the source tree exists where it's currently located
-        cmakehomedir=`grep CMAKE_HOME_DIRECTORY $builddir/CMakeCache.txt | \
-                      sed 's/CMAKE_HOME_DIRECTORY:INTERNAL=//g'`
-        if [ "$cmakehomedir" != "$sourcedir" ]; then
-            # The source tree moved since the build was last configured
-            echo "\
-The source tree has been moved from:
-    $cmakehomedir
-to:
-    $sourcedir
-To reconfigure in the new source directory, please delete:
-    $builddir/CMakeCache.txt" >&2
-            exit 1
-        fi
+        # If the CMake cache exists, delete it so that this configuration
+        # is not tainted by a previous one
+        rm -f $builddir/CMakeCache.txt
     fi
 else
     # Create build directory