--- autoconf/autoscan.pl

+++ autoconf/autoscan.pl

@@ -232,7 +232,7 @@ sub scan_makefile

 	# Strip out comments and variable references.

 	s/#.*//;

 	s/\$\([^\)]*\)//g;

-	s/\${[^\}]*}//g;

+	s/\$\{[^\}]*}//g;

 	s/@[^@]*@//g;

 	# Variable assignments.

--- autoconf/autoscan.pl

+++ autoconf/autoscan.pl

@@ -364,7 +364,7 @@ sub output_headers

 	}

     }

     print CONF "AC_CHECK_HEADERS(" . join(' ', sort(@have_headers)) . ")\n"

-	if defined(@have_headers);

+	if @have_headers;

 }

 sub output_identifiers

@@ -391,5 +391,5 @@ sub output_functions

 	}

     }

     print CONF "AC_CHECK_FUNCS(" . join(' ', sort(@have_funcs)) . ")\n"

-	if defined(@have_funcs);

+	if @have_funcs;

 }