update ceph source to reef 18.1.2

[ceph.git] / ceph / src / boost / tools / build / src / engine / check_cxx11.cpp

diff --git a/ceph/src/boost/tools/build/src/engine/check_cxx11.cpp b/ceph/src/boost/tools/build/src/engine/check_cxx11.cpp
index f01fcff71d4c9394cd32cb151d7411bf07dba9f7..085547b2659fc9fc953083cfb7a1db0cb5fc7e8d 100644 (file)
--- a/ceph/src/boost/tools/build/src/engine/check_cxx11.cpp
+++ b/ceph/src/boost/tools/build/src/engine/check_cxx11.cpp
@@ -1,6 +1,6 @@
 /*  Copyright 2020 Rene Rivera
  *  Distributed under the Boost Software License, Version 1.0.
- *  (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ *  (See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt)
  */
 
 /*
@@ -10,12 +10,22 @@ available. This is used by the build script to guess and check the
 compiler to build the engine with.
 */
 
-// Some headers we depend on..
+// Some headers we test...
 #include <thread>
+#include <memory>
 
 
 int main()
 {
     // Check for basic thread calls.
+    // [2020-08-19] Mingw-w64 with win32 threading model (as opposed to posix
+    // threading model) does not really have std::thread etc. Please see comments
+    // in sysinfo.cpp.
+    #ifndef _WIN32
     { auto _ = std::thread::hardware_concurrency(); }
+    #endif
+
+    // [2021-08-07] We check the following C++11 features: brace initialization,
+    // unique_ptr. Plus the author's ability to memorize some digits.
+    { const std::unique_ptr <float> pf {new float {3.14159f}}; }
 }