From 7d5021bc9e1150b5d839438756851b3175f3ba85 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Wed, 12 Oct 2016 16:56:41 +0200
Subject: erts: Disable DBG_TRACE_MFA for debug build

---
 erts/emulator/beam/beam_load.h | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'erts/emulator/beam')

diff --git a/erts/emulator/beam/beam_load.h b/erts/emulator/beam/beam_load.h
index 5f0f34fcdd..43cf6597df 100644
--- a/erts/emulator/beam/beam_load.h
+++ b/erts/emulator/beam/beam_load.h
@@ -151,10 +151,16 @@ struct BeamCodeLineTab_ {
 #define LOC_FILE(Loc) ((Loc) >> 24)
 #define LOC_LINE(Loc) ((Loc) & ((1 << 24)-1))
 
-#ifdef DEBUG
-# define ENABLE_DBG_TRACE_MFA
-#endif
 
+/*
+ * MFA event debug "tracing" usage:
+ *
+ * #define ENABLE_DBG_TRACE_MFA
+ * call dbg_set_traced_mfa("mymod","myfunc",arity)
+ * for the function(s) to trace, in some init function.
+ *
+ * Run and get stderr printouts when interesting things happen to your MFA.
+ */
 #ifdef  ENABLE_DBG_TRACE_MFA
 
 void dbg_set_traced_mfa(const char* m, const char* f, Uint a);
-- 
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