-if test x$datadir = x'${datarootdir}'
-then
- eval datarootdir="$datarootdir"
- eval datadir="$datadir/yoink"
-fi
+AC_ARG_WITH([assetdir],
+ [AS_HELP_STRING([--with-assetdir=DIR],
+ [real path to game assets (default: $datarootdir/yoink)])],
+ [DATADIR="$withval"],
+ [eval DATADIR="$datarootdir/yoink"])
+
+AC_SUBST([DATADIR])