Added detection whether the basic structure of MySQL / MariaDB

client is named st_mysql or MYSQL.

This resolves FTBFS with MySQL client >= 8.0.
This resolves issue #4.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit fa4a35fd4b)

kexi/kexidb/drivers/configure.in.in

@@ -90,6 +90,43 @@ dnl *** Show that we are doing as requested.              ***
   AC_MSG_NOTICE([Not attempting to configure MySQL as requested])
 fi
 
+if test "$compile_mysql_plugin" = "yes"; then
+    AC_LANG_SAVE
+    AC_LANG_CPLUSPLUS
+    save_CXXFLAGS="$CXXFLAGS"
+    CXXFLAGS="$CXXFLAGS -I$mysql_incdir"
+
+    AC_MSG_CHECKING([if mysql has st_mysql struct])
+    AC_TRY_COMPILE(
+        [
+        #include <mysql.h>
+        typedef struct st_mysql MYSQL;
+        ],
+        [],
+        AC_MSG_RESULT( yes )
+        mysql_struct=st_mysql,
+        AC_MSG_RESULT( no )
+        [
+            AC_MSG_CHECKING([if mysql has MYSQL struct])
+            AC_TRY_COMPILE(
+                [
+                #include <mysql.h>
+                typedef struct MYSQL MYSQL;
+                ],
+                [],
+                AC_MSG_RESULT( yes )
+                mysql_struct=MYSQL,
+                AC_MSG_RESULT( no )
+                compile_mysql_plugin=no
+            )
+        ]
+    )
+
+    CXXFLAGS="$save_CXXFLAGS"
+    AC_LANG_RESTORE
+fi
+
+AC_DEFINE_UNQUOTED(MYSQL_STRUCT, $mysql_struct, [struct type name for MySql])
 AM_CONDITIONAL(compile_mysql_plugin, test "$compile_mysql_plugin" = "yes")
 
 dnl ========================================

kexi/kexidb/drivers/mySQL/mysqlconnection_p.h

@@ -20,6 +20,10 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 #ifndef KEXIDB_MYSQLCLIENT_P_H
 #define KEXIDB_MYSQLCLIENT_P_H
 
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
 #include <kexidb/connection_p.h>
 
 #ifdef TQ_WS_WIN
@@ -28,7 +32,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 #include <mysql_version.h>
 #include <mysql.h>
 
-typedef struct st_mysql MYSQL;
+typedef struct MYSQL_STRUCT MYSQL;
 #undef bool
 
 class TQCString;