-: ${suffix=@PROG_EXT@}
-: ${DESTDIR=@DESTDIR@}
-: ${prefix=@prefix@}
-: ${exec_prefix=@exec_prefix@}
-: ${bindir=@bindir@}
-: ${top_srcdir=@top_srcdir@}
-: ${srcdir=@srcdir@}
-: ${datadir=@datadir@}
-: ${ticdir=@TERMINFO@}
-: ${source=@TERMINFO_SRC@}
-: ${LN_S="@LN_S@"}
-: ${cross_compiling=no}
-: ${ext_funcs=@NCURSES_EXT_FUNCS@}
+: ${suffix:=@EXEEXT@}
+: ${DESTDIR:=@DESTDIR@}
+: ${prefix:=@prefix@}
+: ${exec_prefix:=@exec_prefix@}
+: ${bindir:=@bindir@}
+: ${top_srcdir:=@top_srcdir@}
+: ${srcdir:=@srcdir@}
+: ${datarootdir:=@datarootdir@}
+: ${datadir:=@datadir@}
+: ${TIC_PATH:=@TIC_PATH@}
+: ${ticdir:=@TERMINFO@}
+: ${source:=@TERMINFO_SRC@}
+: ${LN_S:="@LN_S@"}
+: ${cross_compiling:=no}
+: ${ext_funcs:=@NCURSES_EXT_FUNCS@}