Disable -Wdeprecated-declarations for early clang-cl

appveyor.yml

@@ -29,6 +29,11 @@ environment:
 
     # clang-win 32 bit fails to link with "unable to load mspdbcore.dll (error code: 126)"
 
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: clang-win
+      ADDRMD: 64
+      CXXSTD: 14,17,latest
+
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
       TOOLSET: clang-win
       ADDRMD: 64

include/boost/core/detail/lwt_unattended.hpp

@@ -30,9 +30,18 @@ inline void lwt_unattended()
 # pragma warning(push)
 # pragma warning(disable: 4996)
 
+# if defined(__clang__)
+#  pragma clang diagnostic push
+#  pragma clang diagnostic ignored "-Wdeprecated-declarations"
+# endif
+
     // disable message box on crash
     ::_seterrormode( /*SEM_NOGPFAULTERRORBOX*/ 0x0002 );
 
+# if defined(__clang__)
+#  pragma clang diagnostic pop
+# endif
+
 # pragma warning(pop)
 
 #endif