id summary reporter owner description type status milestone component version severity resolution keywords cc 12482 No longer builds without warnings on MAC OS X 10.11.6 after upgrade to Xcode with Clang 8.0 anonymous chris_kohlhoff "After an update to Xcode (version 8) on OS X 10.11.6 I found that my projects won't build due to 'OSMemoryBarrier being deprecated. I tried to rebuild the library with the new tools and found that it won't build either due to the same error. {{{ In file included from /usr/local/include/boost/asio/detail/fenced_block.hpp:24: /usr/local/include/boost/asio/detail/macos_fenced_block.hpp:51:5: warning: 'OSMemoryBarrier' is deprecated: first deprecated in macOS 10.12 - Use std::atomic_thread_fence() from instead [-Wdeprecated-declarations] OSMemoryBarrier(); ^ /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libkern/OSAtomicDeprecated.h:749:9: note: 'OSMemoryBarrier' has been explicitly marked deprecated here void OSMemoryBarrier( void ); ^ 2 warnings generated. }}}" Tasks new Boost 1.61.0 asio Boost 1.61.0 Problem sfkaney@…