From 4b7ce2d670938d1d00e289746789bf78b4517cb8 Mon Sep 17 00:00:00 2001
From: Roger Light <roger@atchoo.org>
Date: Mon, 18 Oct 2021 00:17:29 +0100
Subject: [PATCH] Optional Link Time Optimisation.

---
 config.mk | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/config.mk b/config.mk
index 8ef7aa10..8a2b0af1 100644
--- a/config.mk
+++ b/config.mk
@@ -130,6 +130,9 @@ WITH_XTREPORT=no
 # check routine. See src/keepalive.c for notes on this.
 WITH_OLD_KEEPALIVE=no
 
+# Use link time optimisation
+WITH_LTO=yes
+
 # =============================================================================
 # End of user configuration
 # =============================================================================
@@ -279,6 +282,11 @@ ifeq ($(WITH_BRIDGE),yes)
 	BROKER_CPPFLAGS:=$(BROKER_CPPFLAGS) -DWITH_BRIDGE
 endif
 
+ifeq ($(WITH_LTO),yes)
+	BROKER_CFLAGS:=$(BROKER_CFLAGS) -flto
+	BROKER_LDFLAGS:=$(BROKER_LDFLAGS) -flto
+endif
+
 ifeq ($(WITH_PERSISTENCE),yes)
 	BROKER_CPPFLAGS:=$(BROKER_CPPFLAGS) -DWITH_PERSISTENCE
 endif