--- autoconf-2.13/autoheader.sh
+++ old/autoheader.sh
@@ -122,7 +122,7 @@
 # Extract assignments of SYMS, TYPES, FUNCS, HEADERS, and LIBS from the
 # modified autoconf processing of the input file.  The sed hair is
 # necessary to win for multi-line macro invocations.
-eval "`$M4 -I$AC_MACRODIR $use_localdir $r autoheader.m4$f $infile |
+eval "`$M4 -g -D__gnu__ -I$AC_MACRODIR $use_localdir autoheader.m4 $infile |
        sed -n -e '
 		: again
 		/^@@@.*@@@$/s/^@@@\(.*\)@@@$/\1/p