Index: /trunk/Makefile.tools
===================================================================
--- /trunk/Makefile.tools	(revision 17)
+++ /trunk/Makefile.tools	(revision 18)
@@ -2,4 +2,5 @@
 ECHO					= echo
 EXPORT					= export
+EXIT					= exit
 MKDIR					= mkdir -p
 TEST					= test
@@ -21,4 +22,20 @@
 UPPERtoLOWER				= $(TR) [:lower:] [:upper:]
 CXX					= export LANG=C; g++
+SED					= sed
+TOUCH					= touch
+# Commands to generate all documents
+FIG2EPS					= fig2dev -L eps
+EPS2JPG					= convert -quality 100
+LATEX     				= latex
+BIBTEX    				= bibtex
+MAKEINDEX 				= makeindex
+DVIPS					= dvips -Ppdf
+PS2PDF					= ps2pdf
+GNUPLOT					= gnuplot
+# Commands to view the document
+VIEWDVI					= xdvi
+VIEWPS 					= gv  
+VIEWPDF					= xpdf
+VIEWPDF_FS				= acroread
 
 #-----[ tools ]--------------------------------------------