-ifeq "$(strip $(datadir))" ""
-datadir = $(prefix)/share
-endif
-ifeq "$(strip $(libdir))" ""
-libdir = $(exec_prefix)/lib
-endif
-ifeq "$(strip $(includedir))" ""
-includedir = $(prefix)/include
-endif
-ifeq "$(strip $(oldincludedir))" ""
-oldincludedir = /usr/include
-endif
-ifeq "$(strip $(mandir))" ""
-mandir = $(prefix)/man
-endif
-