From 2b199b51331ebfc708bf5c302a3b1056ef3ab53c Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Thu, 20 Apr 2023 03:13:41 +0300
Subject: [PATCH] Avoid redefinition of BOOST_TIMER_SOURCE

---
 src/auto_timers_construction.cpp | 4 +++-
 src/cpu_timer.cpp                | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/auto_timers_construction.cpp b/src/auto_timers_construction.cpp
index b23b546..db395e9 100644
--- a/src/auto_timers_construction.cpp
+++ b/src/auto_timers_construction.cpp
@@ -18,7 +18,9 @@
 
 // define BOOST_TIMER_SOURCE so that <boost/timer/config.hpp> knows
 // the library is being built (possibly exporting rather than importing code)
-#define BOOST_TIMER_SOURCE 
+#ifndef BOOST_TIMER_SOURCE
+# define BOOST_TIMER_SOURCE
+#endif
 
 #include <boost/timer/timer.hpp>
 #include <iostream>
diff --git a/src/cpu_timer.cpp b/src/cpu_timer.cpp
index 9443bc9..6b0e449 100644
--- a/src/cpu_timer.cpp
+++ b/src/cpu_timer.cpp
@@ -11,7 +11,9 @@
 
 // define BOOST_TIMER_SOURCE so that <boost/timer/config.hpp> knows
 // the library is being built (possibly exporting rather than importing code)
-#define BOOST_TIMER_SOURCE
+#ifndef BOOST_TIMER_SOURCE
+# define BOOST_TIMER_SOURCE
+#endif
 
 #include <boost/timer/timer.hpp>
 #include <boost/io/ios_state.hpp>