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 #9.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 7b0045aa6b)

amarok/configure.in.in

@@ -496,6 +496,40 @@ if test "$enable_mysql" = "yes"; then
 
         mysql_includes=`mysql_config --cflags`
         mysql_libs=`mysql_config --libs`
+
+        AC_LANG_SAVE
+        AC_LANG_CPLUSPLUS
+        save_CXXFLAGS="$CXXFLAGS"
+        CXXFLAGS="$CXXFLAGS $mysql_includes"
+
+        AC_MSG_CHECKING([if mysql has st_mysql struct])
+        AC_TRY_COMPILE(
+            [
+            #include <mysql.h>
+            typedef struct st_mysql MYSQL;
+            ],
+            [],
+            AC_MSG_RESULT( yes )
+            mysql_struct=st_mysql,
+            AC_MSG_RESULT( no )
+            [
+                AC_MSG_CHECKING([if mysql has MYSQL struct])
+                AC_TRY_COMPILE(
+                    [
+                    #include <mysql.h>
+                    typedef struct MYSQL MYSQL;
+                    ],
+                    [],
+                    AC_MSG_RESULT( yes )
+                    mysql_struct=MYSQL,
+                    AC_MSG_RESULT( no )
+                    enable_mysql=no
+                )
+            ]
+        )
+
+        CXXFLAGS="$save_CXXFLAGS"
+        AC_LANG_RESTORE
     else
         amarok_warning_mysql_notfound=yes
         enable_mysql=no
@@ -504,6 +538,7 @@ if test "$enable_mysql" = "yes"; then
 fi
 
 AM_CONDITIONAL(enable_mysql, test x$enable_mysql = xyes)
+AC_DEFINE_UNQUOTED(MYSQL_STRUCT, $mysql_struct, [struct type name for MySql])
 AC_SUBST(mysql_includes)
 AC_SUBST(mysql_libs)
 

amarok/src/collectiondb.h

@@ -149,7 +149,7 @@ class SqliteConnection : public DbConnection
 
 
 #ifdef USE_MYSQL
-typedef struct st_mysql MYSQL;
+typedef struct MYSQL_STRUCT MYSQL;
 
 class MySqlConnection : public DbConnection
 {

config.h.in

@@ -230,6 +230,9 @@
    */
 #undef LT_OBJDIR
 
+/* struct type name for MySql */
+#undef MYSQL_STRUCT
+
 /* Name of package */
 #undef PACKAGE