dnl ** figure out how to do a BSD-ish install
AC_PROG_INSTALL
+dnl Let's make sure install-sh is executable here. If we got it from
+dnl a darcs repo, it might not be (see bug #978).
+chmod +x install-sh
dnl If you can run configure, you certainly have /bin/sh
AC_DEFINE([HAVE_BIN_SH], [1], [Define to 1 if you have /bin/sh.])