From bd831ed0948a1e99f573f0056f2bee5d3b21009e Mon Sep 17 00:00:00 2001
From: Felix Geyer <debfx@fobos.de>
Date: Tue, 6 Nov 2018 18:33:43 +0100
Subject: FindBoost: Add system thread library to Boost_LIBRARIES

Add the system thread library to Boost_LIBRARIES when the boost thread
component has been found.

The Boost::thread imported target already pulls in Threads::Threads.
This changes does the same for projects using the Boost_LIBRARIES variable
instead.
---
 Modules/FindBoost.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Modules/FindBoost.cmake b/Modules/FindBoost.cmake
index e983941..0794a6f 100644
--- a/Modules/FindBoost.cmake
+++ b/Modules/FindBoost.cmake
@@ -2074,6 +2074,9 @@ if(Boost_FOUND)
         message (STATUS "  ${COMPONENT}")
       endif()
       list(APPEND Boost_LIBRARIES ${Boost_${UPPERCOMPONENT}_LIBRARY})
+      if(COMPONENT STREQUAL "thread")
+        list(APPEND Boost_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+      endif()
     endif()
   endforeach()
 else()
-- 
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