diff --git a/common/create-sbu_du-report.sh b/common/create-sbu_du-report.sh
index 5c505c5..1e08bf4 100755
--- a/common/create-sbu_du-report.sh
+++ b/common/create-sbu_du-report.sh
@@ -6,6 +6,8 @@ set -e
 LOGSDIR=$1
 VERSION=$2
 
+LINE="================================================================================"
+
 # Make sure that we have a directory as first argument
 [[ ! -d "$LOGSDIR" ]] && \
   echo -e "\nUSAGE: create-sbu_du-report.sh logs_directory [book_version]\n" && exit
@@ -25,6 +27,8 @@ VERSION=$2
 # Set the report file
 REPORT="$VERSION"-SBU_DU-$(date --iso-8601).report
 
+[ -f $REPORT ] && : >$REPORT
+
 # Dump generation time stamp and book version
 echo -e "\n`date`\n" > "$REPORT"
 echo -e "Book version is:\t$VERSION\n" >> "$REPORT"
@@ -44,82 +48,74 @@ echo -e "\n\t\tMemory info:\n" >> "$REPORT"
 free >> "$REPORT"
 
 # Parse only that logs that have time data
-BUILDLOGS=`grep -l "^real\>" $LOGSDIR/*`
+BUILDLOGS="`grep -l "^Totalseconds:" ${LOGSDIR}/*`"
 
 # Match the first timed log to extract the SBU unit value from it
-BASELOG=`grep -l "^real\>" $LOGSDIR/* | head -n1`
-echo -e "\n\nUsing $BASELOG to obtain the SBU unit value." >> "$REPORT"
-BASEMINUTES=`grep "^real\>" $BASELOG | cut -f2 | sed -e 's/m.*//'`
-BASESECONDS=`grep "^real\>" $BASELOG | cut -f2 | sed -e 's/.*m//;s/s//'`
-SBU_UNIT=`echo "scale=3; $BASEMINUTES * 60 + $BASESECONDS" | bc`
-echo -e "The SBU unit value is equal to $SBU_UNIT seconds.\n" >> "$REPORT"
+BASELOG=`grep -l "^Totalseconds:" $LOGSDIR/* | head -n1`
+echo -e "\nUsing ${BASELOG#*[[:digit:]]-} to obtain the SBU unit value."
+SBU_UNIT=`sed -n 's/^Totalseconds:\s\([[:digit:]]*.[[:digit:]]*\)$/\1/p' $BASELOG`
+echo -e "\nThe SBU unit value is equal to $SBU_UNIT seconds.\n"
+echo -e "\n\n$LINE\n\nThe SBU unit value is equal to $SBU_UNIT seconds.\n" >> "$REPORT"
 
 # Set the first value to 0 for grand totals calculation
 SBU2=0
 INSTALL2=0
 INSTALLMB2=0
 
+# Start the loop
 for log in $BUILDLOGS ; do
 
-#Start SBU calculation
-  # Build time
-  BUILDTIME=`grep "^real\>" $log | cut -f2`
-  # Build time in seconds
-  MINUTES=`grep "^real\>" $log | cut -f2 | sed -e 's/m.*//'`
-  SECS=`grep "^real\>" $log | cut -f2 | sed -e 's/.*m//;s/s//'`
-  TIME=`echo "scale=3; $MINUTES * 60 + $SECS" | bc`
-  # Calculate build time in SBU
-  SBU=`echo "scale=3; $TIME / $SBU_UNIT" | bc`
-  # Append SBU value to SBU2 for grand total
-  SBU2="$SBU2 + $SBU"
+# Strip the filename
+  PACKAGE="${log#*[[:digit:]]*-}"
 
-#Start disk usage calculation
-  # Disk usage before unpacking the package
+# Start SBU calculation
+# Build time
+  TIME=`sed -n 's/^Totalseconds:\s\([[:digit:]]*.[[:digit:]]*\)$/\1/p' $log`
+  SECS=`perl -e 'print ('$TIME' % '60')';`
+  MINUTES=`perl -e 'printf "%.0f" , (('$TIME' - '$SECS') / '60')';`
+  SBU=`perl -e 'printf "%.3f" , ('$TIME' / '$SBU_UNIT')';`
+
+# Append SBU value to SBU2 for grand total
+  SBU2=`perl -e 'printf "%.3f" , ('$SBU2' + '$SBU')';`
+
+# Start disk usage calculation
+# Disk usage before unpacking the package
   DU1=`grep "^KB: " $log | head -n1 | cut -f1 | sed -e 's/KB: //'`
-  DU1MB=`echo "scale=2; $DU1 / 1024" | bc`
-  # Disk usage before deleting the source and build dirs
+  DU1MB=`perl -e 'printf "%.3f" , ('$DU1' / '1024')';`
+# Disk usage before deleting the source and build dirs
   DU2=`grep "^KB: " $log | tail -n1 | cut -f1 | sed -e 's/KB: //'`
-  DU2MB=`echo "scale=2; $DU2 / 1024" | bc`
-  # Calculate disk space required to do the build
-  REQUIRED1=`echo "$DU2 - $DU1" | bc`
-  REQUIRED2=`echo "scale=2; $DU2MB - $DU1MB" | bc`
+  DU2MB=`perl -e 'printf "%.3f" , ('$DU2' / '1024')';`
+# Calculate disk space required to do the build
+  REQUIRED1=`perl -e 'print ('$DU2' - '$DU1')';`
+  REQUIRED2=`perl -e 'printf "%.3f" , ('$DU2MB' - '$DU1MB')';`
 
-  # Append installed files disk usage to the previous entry,
-  # except for the first parsed log
+# Append installed files disk usage to the previous entry,
+# except for the first parsed log
   if [ "$log" != "$BASELOG" ] ; then
-    INSTALL=`echo "$DU1 - $DU1PREV" | bc`
-    INSTALLMB=`echo "scale=2; $DU1MB - $DU1MBPREV" | bc`
-    echo -e "Installed files disk usage:\t\t\t\t$INSTALL KB or $INSTALLMB MB\n" >> "$REPORT"
+    INSTALL=`perl -e 'print ('$DU1' - '$DU1PREV')';`
+    INSTALLMB=`perl -e 'printf "%.3f" , ('$DU1MB' - '$DU1MBPREV')';`
+    echo -e "Installed files disk usage:\t\t\t\t$INSTALL KB or $INSTALLMB MB\n" >> $REPORT
     # Append install values for grand total
-    INSTALL2="$INSTALL2 + $INSTALL"
-    INSTALLMB2="$INSTALLMB2 + $INSTALLMB"
+    INSTALL2=`perl -e 'printf "%.3f" , ('$INSTALL2' + '$INSTALL')';`
+    INSTALLMB2=`perl -e 'printf "%.3f" , ('$INSTALLMB2' + '$INSTALLMB')';`
   fi
 
-  # Set variables to calculate installed files disk usage
+# Set variables to calculate installed files disk usage
   DU1PREV=$DU1
   DU1MBPREV=$DU1MB
 
-  # Append log name
-  echo -e "\n\t$log" >> "$REPORT"
-
-  # Dump time values
-  echo -e "Build time is:\t\t\t$BUILDTIME" >> "$REPORT"
-  echo -e "Build time in seconds is\t$TIME" >> "$REPORT"
-  echo -e "Approximate SBU time is:\t$SBU" >> "$REPORT"
-
-  # Dump disk usage values
-  echo -e "\nDisk usage before unpacking the package:\t\t$DU1 KB or $DU1MB MB" >> "$REPORT"
-  echo -e "Disk usage before deleting the source and build dirs:\t$DU2 KB or $DU2MB MB" >> "$REPORT"
-  echo -e "Required space to build the package:\t\t\t$REQUIRED1 KB or $REQUIRED2 MB\n" >> "$REPORT"
+# Dump time and disk usage values
+  echo -e "$LINE\n\t\t\t\t[$PACKAGE]\n" >> $REPORT
+  echo -e "Build time is:\t\t\t\t\t\t$MINUTES minutes and $SECS seconds" >> $REPORT
+  echo -e "Build time in seconds is:\t\t\t\t$TIME" >> $REPORT
+  echo -e "Approximate SBU time is:\t\t\t\t$SBU" >> $REPORT
+  echo -e "Disk usage before unpacking the package:\t\t$DU1 KB or $DU1MB MB" >> $REPORT
+  echo -e "Disk usage before deleting the source and build dirs:\t$DU2 KB or $DU2MB MB" >> $REPORT
+  echo -e "Required space to build the package:\t\t\t$REQUIRED1 KB or $REQUIRED2 MB" >> $REPORT
 
 done
 
 # Dump grand totals
-TOTALSBU=`echo "scale=3; ${SBU2}" | bc`
-echo -e "\nTotal time required to build the systen:\t$TOTALSBU SBU\n" >> "$REPORT"
-TOTALINSTALL=`echo "${INSTALL2}" | bc`
-TOTALINSTALLMB=`echo "scale=2; ${INSTALLMB2}" | bc`
-echo -e "Total Installed files disk usage
-    (including /tools but not /sources):\t$TOTALINSTALL KB or $TOTALINSTALLMB MB\n" >> "$REPORT"
-
-
+echo -e "\n$LINE\n\nTotal time required to build the systen:\t\t$SBU2  SBU" >> $REPORT
+# Total disk usage: including /tools but not /sources.
+echo -e "Total Installed files disk usage:\t\t\t$INSTALL2 KB or $INSTALLMB2 MB" >> $REPORT
diff --git a/common/libs/func_validate_configs.sh b/common/libs/func_validate_configs.sh
index 4c74ee8..84a2bf7 100644
--- a/common/libs/func_validate_configs.sh
+++ b/common/libs/func_validate_configs.sh
@@ -117,6 +117,7 @@ inline_doc
       TIMEZONE        | \
       PAGE            | \
       INSTALL_LOG     | \
+      REPORT          | \
       REBUILD_MAKEFILE ) echo -e "`eval echo $PARAM_VALS`" ;;
 
       # Envvars that depend on other settings to be displayed
@@ -138,25 +139,13 @@ inline_doc
       LGROUP)     echo -e "`eval echo $PARAM_VALS`"
                   [[ "${!config_param}" = "**EDIT ME**" ]] && write_error_and_die
                   ;;
-      REPORT)     echo -e "`eval echo $PARAM_VALS`"
-                  if [[ "${!config_param}" = "y" ]]; then
-                    if [[ `type -p bc` ]]; then
-                      continue
-                    else
-                      echo -e "  ${BOLD}The bc binary was not found${OFF}"
-                      echo -e "  The SBU and disk usage report creation will be skiped"
-                      REPORT=n
-                      continue
-                    fi
-                  fi ;;
-
         # BOOK validation. Very ugly, need be fixed
       BOOK)        if [[ "${WORKING_COPY}" = "y" ]] ; then
                      validate_dir -z -d
                    else
                      echo -e "`eval echo $PARAM_VALS`"
-                   fi ;;
-
+                   fi
+                  ;;
         # Validate directories, testable states:
         #  fatal   -z -d -w,
         #  warning -z+   -w+
diff --git a/common/libs/func_wrt_Makefile b/common/libs/func_wrt_Makefile
index 4ce3f09..7bbec93 100644
--- a/common/libs/func_wrt_Makefile
+++ b/common/libs/func_wrt_Makefile
@@ -40,6 +40,8 @@ SU_LUSER       = su - \$(LUSER) -c
 LUSER_HOME     = \$(LHOME)/\$(LUSER)
 PRT_DU         = echo -e "\nKB: \`du -skx --exclude=\$(SCRIPT_ROOT) --exclude=lost+found \$(MOUNT_PT) \`\n"
 PRT_DU_CR      = echo -e "\nKB: \`du -skx --exclude=\$(SCRIPT_ROOT) --exclude=lost+found / \`\n"
+TIME_MARK      = \`date +%s.%N\`
+BUILD_TIME     = perl -e "printf \"\nTotalseconds: %.3f\", ('\$\$end' - '\$\$start')"
 
 ADD_REPORT       = $REPORT
 ADD_CUSTOM_TOOLS = $CUSTOM_TOOLS
@@ -230,21 +232,27 @@ wrt_RunAsRoot() {                  # Some scripts must be run as root..
 
 (
 cat << EOF
-	@( time { export ${MOUNT_ENV}=\$(MOUNT_PT) && ${PROGNAME}-commands/`dirname $file`/\$@ >>logs/\$@ 2>&1 ; } ) 2>>logs/\$@ && \\
+	@start=\$(TIME_MARK) && \\
+	export ${MOUNT_ENV}=\$(MOUNT_PT) && \\
+	${PROGNAME}-commands/`dirname $file`/\$@ >>logs/\$@ 2>&1 && \\
+	end=\$(TIME_MARK) && \$(BUILD_TIME) >>logs/\$@ && \\
 	\$(PRT_DU) >>logs/\$@
 EOF
 ) >> $MKFILE.tmp
 }
 
 #----------------------------------#
-LUSER_wrt_RunAsUser() {            # Execute script inside time { }, footer to log file
+LUSER_wrt_RunAsUser() {            # Calculate time with perl, footer to log file
 #----------------------------------#
   local file=$1
 
 (
 cat << EOF
-	@( time { source ~/.bashrc && \$(CMDSDIR)/`dirname $file`/\$@ >> logs/\$@ 2>&1; } ) 2>> logs/\$@ && \\
-	\$(PRT_DU) >> logs/\$@
+	@start=\$(TIME_MARK) && \\
+	source ~/.bashrc && \\
+	\$(CMDSDIR)/`dirname $file`/\$@ >> logs/\$@ 2>&1 && \\
+	end=\$(TIME_MARK) && \$(BUILD_TIME) >>logs/\$@ && \\
+	\$(PRT_DU) >>logs/\$@
 EOF
 ) >> $MKFILE.tmp
 }
@@ -255,7 +263,10 @@ CHROOT_wrt_RunAsRoot() {           #
   local file=$1
 (
 cat << EOF
-	@( time { source envars && \$(crCMDSDIR)/`dirname $file`/\$@ >>logs/\$@ 2>&1 ; } ) 2>>logs/\$@ && \\
+	@start=\$(TIME_MARK) && \\
+	source envars && \\
+	\$(crCMDSDIR)/`dirname $file`/\$@ >>logs/\$@ 2>&1 && \\
+	end=\$(TIME_MARK) && \$(BUILD_TIME) >>logs/\$@ && \\
 	\$(PRT_DU_CR) >>logs/\$@
 EOF
 ) >> $MKFILE.tmp
@@ -272,7 +283,10 @@ LUSER_wrt_CopyFstab() {            #
 #----------------------------------#
 (
 cat << EOF
-	@( time { cp -v \$(MOUNT_PT)/sources/fstab \$(MOUNT_PT)/etc/fstab >>logs/\$@ 2>&1 ; } ) 2>>logs/\$@
+	@start=\$(TIME_MARK) && \\
+	cp -v \$(MOUNT_PT)/sources/fstab \$(MOUNT_PT)/etc/fstab >>logs/\$@ 2>&1 && \\
+	end=\$(TIME_MARK) && \$(BUILD_TIME) >>logs/\$@ && \\
+	\$(PRT_DU) >>logs/\$@
 EOF
 ) >> $MKFILE.tmp
 }
@@ -282,7 +296,10 @@ CHROOT_wrt_CopyFstab() {           #
 #----------------------------------#
 (
 cat << EOF
-	@( time { cp -v /sources/fstab /etc/fstab >>logs/\$@ 2>&1 ; } ) 2>>logs/\$@
+	@start=\$(TIME_MARK) && \\
+	cp -v /sources/fstab /etc/fstab >>logs/\$@ 2>&1 && \\
+	end=\$(TIME_MARK) && \$(BUILD_TIME) >>logs/\$@ && \\
+	\$(PRT_DU_CR) >>logs/\$@
 EOF
 ) >> $MKFILE.tmp
 }
@@ -295,7 +312,6 @@ EOF
 #----------------------------------#
 CHROOT_wrt_TouchTimestamp() {      #
 #----------------------------------#
-  local name=$1
 (
 cat << EOF
 	@\$(call touch_timestamp)