From 9855a80fd41e384bc3accd07fa8b98f7da7d916d Mon Sep 17 00:00:00 2001
From: Hannes Franke <hannes.franke@smartoptics.de>
Date: Mon, 29 Oct 2018 16:20:40 +0100
Subject: FindBoost: search default path if Boost_FIND_VERSION_EXACT

Search paths for boost versions should be build using _boost_TEST_VERSIONS
instead of _Boost_KNOWN_VERSIONS because if Boost_FIND_VERSION_EXACT
is used _Boost_KNOWN_VERSIONS is empty and boost isn't found even in its
default installation path.

Fixes: #17986
---
 Modules/FindBoost.cmake | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Modules/FindBoost.cmake b/Modules/FindBoost.cmake
index 501929a..cde3738 100644
--- a/Modules/FindBoost.cmake
+++ b/Modules/FindBoost.cmake
@@ -1258,7 +1258,7 @@ if(NOT Boost_INCLUDE_DIR)
     list(APPEND _boost_INCLUDE_SEARCH_DIRS NO_CMAKE_SYSTEM_PATH NO_SYSTEM_ENVIRONMENT_PATH)
   else()
     if("x${CMAKE_CXX_COMPILER_ID}" STREQUAL "xMSVC")
-      foreach(ver ${_Boost_KNOWN_VERSIONS})
+      foreach(ver ${_boost_TEST_VERSIONS})
         string(REPLACE "." "_" ver "${ver}")
         list(APPEND _boost_INCLUDE_SEARCH_DIRS PATHS "C:/local/boost_${ver}")
       endforeach()
@@ -1569,7 +1569,7 @@ foreach(c DEBUG RELEASE)
     if( Boost_NO_SYSTEM_PATHS )
       list(APPEND _boost_LIBRARY_SEARCH_DIRS_${c} NO_CMAKE_SYSTEM_PATH NO_SYSTEM_ENVIRONMENT_PATH)
     else()
-      foreach(ver ${_Boost_KNOWN_VERSIONS})
+      foreach(ver ${_boost_TEST_VERSIONS})
         string(REPLACE "." "_" ver "${ver}")
         _Boost_UPDATE_WINDOWS_LIBRARY_SEARCH_DIRS_WITH_PREBUILT_PATHS(_boost_LIBRARY_SEARCH_DIRS_${c} "C:/local/boost_${ver}")
       endforeach()
-- 
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