Add resolve-system-dependencies.pl

configure.ac

@@ -261,6 +261,23 @@ AC_MSG_RESULT(yes)
 AC_SUBST(perlFlags)
 
 
+# Check for otool, an optional dependency on Darwin.
+AC_PATH_PROG(otool, otool)
+AC_MSG_CHECKING([that otool works])
+case $host_os in
+  darwin*)
+    if test -z "$otool" || ! $otool --version 2>/dev/null; then
+      AC_MSG_RESULT(no)
+      AC_MSG_ERROR([Can't get version from otool; do you need to install developer tools?])
+    fi
+    AC_MSG_RESULT(yes)
+    ;;
+  *)
+    AC_MSG_RESULT(not needed)
+    ;;
+esac
+
+
 # Whether to build the Perl bindings
 AC_MSG_CHECKING([whether to build the Perl bindings])
 AC_ARG_ENABLE(perl-bindings, AC_HELP_STRING([--enable-perl-bindings],