From 96cee2a64cd0208f47fe4a0fc2af5e4366574a84 Mon Sep 17 00:00:00 2001
From: Martin Sumner <martin.sumner@adaptip.co.uk>
Date: Fri, 4 May 2018 17:14:12 +0100
Subject: [PATCH] Add specific compile flag to avoid deprecation warning

Will see us through OTP 20 and 21.
---
 rebar.config        |  1 +
 src/leveled_cdb.erl | 11 +++++++++++
 src/leveled_sst.erl |  8 ++++++++
 3 files changed, 20 insertions(+)

diff --git a/rebar.config b/rebar.config
index a28ea33..7aa7bcc 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,5 @@
 {erl_opts, [warnings_as_errors,
+	    {platform_define, "^2[0-1]{1}", fsm_deprecated},
             {platform_define, "^1[7-8]{1}", old_rand},
             {platform_define, "^R", old_rand},
             {platform_define, "^R", no_sync}]}.
diff --git a/src/leveled_cdb.erl b/src/leveled_cdb.erl
index 9adff0e..5100b8b 100644
--- a/src/leveled_cdb.erl
+++ b/src/leveled_cdb.erl
@@ -46,6 +46,17 @@
 -behaviour(gen_fsm).
 -include("include/leveled.hrl").
 
+
+-ifdef(fsm_deprecated).
+-compile({nowarn_deprecated_function, 
+            [{gen_fsm, start, 3},
+                {gen_fsm, sync_send_event, 3},
+                {gen_fsm, sync_send_event, 2},
+                {gen_fsm, send_event, 2},
+                {gen_fsm, sync_send_all_state_event, 3},
+                {gen_fsm, send_all_state_event, 2}]}).
+-endif.
+
 -export([init/1,
             handle_sync_event/4,
             handle_event/3,
diff --git a/src/leveled_sst.erl b/src/leveled_sst.erl
index 857cc48..33fc79c 100644
--- a/src/leveled_sst.erl
+++ b/src/leveled_sst.erl
@@ -62,6 +62,14 @@
 
 -behaviour(gen_fsm).
 
+-ifdef(fsm_deprecated).
+-compile({nowarn_deprecated_function, 
+            [{gen_fsm, start, 3},
+                {gen_fsm, sync_send_event, 3},
+                {gen_fsm, send_event, 2},
+                {gen_fsm, send_all_state_event, 2}]}).
+-endif.
+
 -include("include/leveled.hrl").
 
 -define(MAX_SLOTS, 256).