Disable Interprocess tests when /RTC is in effect.

test/cfoa/interprocess_concurrency_tests.cpp

@@ -2,6 +2,15 @@
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(__MSVC_RUNTIME_CHECKS)
+BOOST_PRAGMA_MESSAGE(
+  "Test skipped because of /RTCc, which is incompatible with Boost.Interprocess");
+int main() {}
+#else
+
 #include <boost/unordered/concurrent_flat_map.hpp>
 #include <atomic>
 #include <boost/asio.hpp>
@@ -115,3 +124,5 @@ int main(int argc, char** argv)
     return child(std::atoi(argv[1]),argv[2]);
   }
 }
+
+#endif