+DEBIAN=expr "`cat /etc/issue`" : '.*Debian.*'
+SUSE=expr "`cat /etc/issue`" : '.*SuSE.*'
+REDHAT=expr "`cat /etc/issue`" : '.*RedHat.*'
+
+ifneq (${DEBIAN},0)
+OS:=debian
+else
+ ifneq (${SUSE},0)
+ OS=suse
+ else
+ ifneq (${REDHAT},0)
+ OS=redhat
+ endif
+ endif
+endif
+
+