File xemacs-configure.patch of Package xemacs
--- configure.ac
+++ configure.ac
@@ -387,6 +387,7 @@ dnl ------------------------------------
dnl
dnl Internal macro to recursively expand all the options in the option list.
dnl
+m4_define([m4_fst], [$1])
define([XE_EXPAND_COMPLEX_OPTIONS],
[m4_if([$2], [], [],
[XE_EXPAND_COMPLEX_OPTION([$1], m4_fst($2))[]dnl