--- sql.c.orig	2019-01-13 16:47:03.571886931 +0300
+++ sql.c	2019-01-13 16:46:25.587117868 +0300
@@ -34,6 +34,10 @@
 #include "common.h"
 #include "spine.h"
 
+#if !defined(my_bool) && MYSQL_VERSION_ID >= 80001 && MYSQL_VERSION_ID < 100100
+#define my_bool bool
+#endif
+
 /*! \fn int db_insert(MYSQL *mysql, int type, const char *query)
  *  \brief inserts a row or rows in a database table.
  *  \param mysql the database connection object