Qzint , need change pro from lib to subfolder, config +=ordered, to add

zint as subproyect

3rdparty/zint-2.4.4/backend/gs1.h

@@ -0,0 +1,35 @@
+/* gs1.h - Verifies GS1 data */
+
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2009 Robin Stuart <robin@zint.org.uk>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#ifndef __GS1_H
+#define __GS1_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+extern int gs1_verify(struct zint_symbol *symbol, unsigned char source[], const unsigned int src_len, char reduced[]);
+extern int ugs1_verify(struct zint_symbol *symbol, unsigned char source[], const unsigned int src_len, unsigned char reduced[]);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GS1_H */