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

@@ -27,6 +27,23 @@ inline void lwt_unattended()
     // disable message boxes on assert(), abort()
     ::_set_abort_behavior( 0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT );
 
+# 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
 
 #if defined(_MSC_VER) && defined(_CPPLIB_VER) && defined(_DEBUG)