diff --git a/scripts/linklibs.sh b/scripts/linklibs.sh
--- a/scripts/linklibs.sh
+++ b/scripts/linklibs.sh
@@ -25,17 +25,14 @@ echo
 echo
 echo 
 
-# Absolute path to this script. /home/user/bin/foo.sh
-#SCRIPT=$(readlink -f $0)
-# Absolute path this script is in. /home/user/bin
 
-#LPP_PATCHPATH=`dirname $SCRIPT`
-LPP_PATCHPATH=`pwd -L`
-
+VHDLIB_LIB_PATH=`pwd -L`
+source $VHDLIB_LIB_PATH/scripts/lpp_bash_functions.sh
 GRLIBPATH=$1
 
-echo $LPP_PATCHPATH
 if [ -d "$GRLIBPATH" ]; then
+        LPP_PATCHPATH=`relpath $GRLIBPATH $VHDLIB_LIB_PATH`
+        echo $LPP_PATCHPATH
 	if [ -d "$GRLIBPATH/lib" ]; then
 		if [ -d "$GRLIBPATH/designs" ]; then
 			if [ -d "$GRLIBPATH/boards" ]; then
diff --git a/scripts/lpp_bash_functions.sh b/scripts/lpp_bash_functions.sh
new file mode 100644
--- /dev/null
+++ b/scripts/lpp_bash_functions.sh
@@ -0,0 +1,82 @@
+#!/bin/bash
+#"======================================================================================="
+#"---------------------------------------------------------------------------------------"
+#"                                 LPP VHDL lib makeDirs                                   "
+#"                    Copyright (C) 2010 Laboratory of Plasmas Physic.                     "
+#"======================================================================================="
+#----------------------------------------------------------------------------------------
+#            This file is a part of the LPP VHDL IP LIBRARY
+#            Copyright (C) 2010, Laboratory of Plasmas Physic - CNRS
+#
+#            This program is free software; you can redistribute it and/or modify
+#            it under the terms of the GNU General Public License as published by
+#            the Free Software Foundation; either version 3 of the License, or
+#            (at your option) any later version.
+#
+#            This program is distributed in the hope that it will be useful,
+#            but WITHOUT ANY WARRANTY; without even the implied warranty of
+#            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#            GNU General Public License for more details.
+#
+#            You should have received a copy of the GNU General Public License
+#            along with this program; if not, write to the Free Software
+#            Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#----------------------------------------------------------------------------------------
+
+
+
+# Full path function
+function fullpath() {
+    if test $# -gt 0
+    then
+        cd $1
+        echo `pwd`
+    fi
+}
+
+
+
+# Relative path function
+# both $1 and $2 are absolute paths (biginning with /)
+# returns $2 relative to $1
+function relpath() {
+    if test $# -gt 1
+    then
+        source=`fullpath $1`
+        target=`fullpath $2`
+
+        common_part=$source # for now
+        result="" # for now
+
+        while [[ "${target#$common_part}" == "${target}" ]]; do
+            # no match, means that candidate common part is not correct
+            # go up one level (reduce common part)
+            common_part="$(dirname $common_part)"
+            # and record that we went back, with correct / handling
+            if [[ -z $result ]]; then
+                result=".."
+            else
+                result="../$result"
+            fi
+        done
+
+        if [[ $common_part == "/" ]]; then
+            # special case for root (no common path)
+            result="$result/"
+        fi
+
+        # since we now have identified the common part,
+        # compute the non-common part
+        forward_part="${target#$common_part}"
+
+        # and now stick all parts together
+        if [[ -n $result ]] && [[ -n $forward_part ]]; then
+            result="$result$forward_part"
+        elif [[ -n $forward_part ]]; then
+            # extra slash removal
+            result="${forward_part:1}"
+        fi
+
+        echo $result
+    fi
+}
diff --git a/scripts/relative_path.sh b/scripts/relative_path.sh
deleted file mode 100644
--- a/scripts/relative_path.sh
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/bin/bash
-# both $1 and $2 are absolute paths (biginning with /)
-# returns $2 relative to $1
-
-source=$1
-target=$2
-
-common_part=$source # for now
-result="" # for now
-
-while [[ "${target#$common_part}" == "${target}" ]]; do
-    # no match, means that candidate common part is not correct
-    # go up one level (reduce common part)
-    common_part="$(dirname $common_part)"
-    # and record that we went back, with correct / handling
-    if [[ -z $result ]]; then
-        result=".."
-    else
-        result="../$result"
-    fi
-done
-
-if [[ $common_part == "/" ]]; then
-    # special case for root (no common path)
-    result="$result/"
-fi
-
-# since we now have identified the common part,
-# compute the non-common part
-forward_part="${target#$common_part}"
-
-# and now stick all parts together
-if [[ -n $result ]] && [[ -n $forward_part ]]; then
-    result="$result$forward_part"
-elif [[ -n $forward_part ]]; then
-    # extra slash removal
-    result="${forward_part:1}"
-fi
-
-echo $result