We get a linker warning otherwise from YYSTYPE changing.
--- a/lib/getdate.y
+++ b/lib/getdate.y
@@ -1,3 +1,5 @@
+%define api.prefix {getdate}
+
 %{
 /*
 **  Originally written by Steven M. Bellovin <smb@research.att.com> while
@@ -117,10 +119,6 @@ extern struct tm	*localtime();
 extern time_t get_date(char * p, struct timeb * now);
 /*@=exportheader@*/
 
-#define yyparse getdate_yyparse
-#define yylex getdate_yylex
-#define yyerror getdate_yyerror
-
 static int yyparse (void);
 static int yylex (void);
 static int yyerror(const char * s);
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,7 +1,7 @@
 
 noinst_HEADERS = flow-dscan.h pcap.h cflowd.h acl2.h
 
-BUILT_SOURCES = aclyacc.h
+BUILT_SOURCES = aclyacc.h acllex.c
 AM_YFLAGS = -d
 
 EXTRA_DIST = ftbuild.sh