configure.ac: Add option to configure the image directory.

diff --git a/configure.ac b/configure.ac
index 983aa801cf217cc8b8fdd2160e3813e28db35920..aa865464543e59bafce01c7014179027aeabf70f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -45,7 +45,12 @@ AC_CHECK_PROGS([AUTOM4TE], [autom4te])
 dnl--------------------------------------------------------------------------
 dnl Checking for Lisp implementations.
 
-imagedir=$localstatedir/$PACKAGE_NAME; AC_SUBST(imagedir)
+AC_ARG_WITH([imagedir],
+  [AS_HELP_STRING([--with-imagedir=DIR],
+                 [store and look for custom Lisp images in DIR])],
+  [imagedir=$withval], [imagedir=$localstatedir/$PACKAGE_NAME])
+AC_SUBST(imagedir)
+
 mdw_DEFINE_PATHS([
   mdw_DEFINE_PATH([IMAGEDIR], [$imagedir])
   mdw_DEFINE_PATH([ETCDIR], [$sysconfdir/$PACKAGE_NAME])