Index: data/m4sugar/m4sugar.m4
--- data/m4sugar/m4sugar.m4.orig
+++ data/m4sugar/m4sugar.m4
@@ -31,13 +31,6 @@ divert(-1)#                                           
 changequote()
 changequote([, ])
 
-# Some old m4's don't support m4exit.  But they provide
-# equivalent functionality by core dumping because of the
-# long macros we define.
-ifdef([__gnu__], ,
-[errprint(M4sugar requires GNU M4. Install it before installing M4sugar or
-set the M4 environment variable to its absolute file name.)
-m4exit(2)])
 
 
 ## ------------------------------- ##
