Add expr.h as place holder

lib/expr.c

@@ -22,6 +22,7 @@
 #include <float.h>
 #include "ii.h"
 #include "geo.h"
+#include "expr.h"
 #include "util.h"
 #include "normalizer_in.h"
 

lib/expr.h

@@ -0,0 +1,30 @@
+/* -*- c-basic-offset: 2 -*- */
+/*
+  Copyright(C) 2013 Brazil
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License version 2.1 as published by the Free Software Foundation.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef GRN_EXPR_H
+#define GRN_EXPR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRN_EXPR_H */

lib/sources.am

@@ -13,6 +13,7 @@ libgroonga_la_SOURCES =				\
 	error.c					\
 	error.h					\
 	expr.c					\
+	expr.h					\
 	geo.c					\
 	geo.h					\
 	groonga_in.h				\