diff --git a/Makefile b/Makefile
index 3f03bdb..3e0b356 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,4 @@
+PHONY : clean doc all
 all : prog
 	
 prog : 
diff --git a/extra/Cahier_Des_Charges.odt b/extra/Cahier_Des_Charges.odt
new file mode 100644
index 0000000..ad8142c
Binary files /dev/null and b/extra/Cahier_Des_Charges.odt differ