[xerces-c] 01/13: cmake: Allow thread checks to fail and fall back to nothreads

[borisk]

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borisk pushed a commit to branch master
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commit f789fcdd4ee2e48d0700d9e2eaf10d59428d616e
Author: Roger Leigh <rle...@apache.org>
AuthorDate: Fri Oct 12 12:02:58 2018 +0000

    cmake: Allow thread checks to fail and fall back to nothreads
    
    Closes: #2155
    
    
    git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@1843653 
13f79535-47bb-0310-9956-ffa450edef68
---
 cmake/XercesMutexMgrSelection.cmake | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/cmake/XercesMutexMgrSelection.cmake 
b/cmake/XercesMutexMgrSelection.cmake
index 2f1d71c..ad69884 100644
--- a/cmake/XercesMutexMgrSelection.cmake
+++ b/cmake/XercesMutexMgrSelection.cmake
@@ -19,11 +19,15 @@
 
 # mutexmgr selection
 
-option(threads "Threading support" ON)
+set(xerces_thread_default ON)
+find_package(Threads)
+if(NOT TARGET Threads::Threads)
+  set(xerces_thread_default ON)
+endif()
 
-include(CheckCXXSourceCompiles)
+option(threads "Threading support" ${xerces_thread_default})
 
-find_package(Threads REQUIRED)
+include(CheckCXXSourceCompiles)
 
 function(thread_test outvar)
   set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} 
${CMAKE_THREAD_LIBS_INIT})


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