id summary reporter owner description type status milestone component version severity resolution keywords cc 11175 signals2, filesystem, probably others fail on clang targeting win32 when exceptions are disabled hlandau@… Beman Dawes "To reproduce: {{{ clang -fno-exceptions -std=c++14 reprod.cpp }}} reprod.cpp: {{{ #include #include }}} You can target win32 from Linux using wclang (https://github.com/tpoechtrager/wclang), though you must have a i686-w64-mingw32 environment installed. Substitute 'clang' for 'w32-clang' above. This is how I tested; since clang is rather universal as a compiler, these errors likely also occur when compiling for win32 on win32. The documentation for filesystem3 indicates that it should be usable with exceptions disabled, so this is a bug. Errors: {{{ In file included from reprod.cpp:1: In file included from /usr/i686-w64-mingw32/local/include/boost/filesystem.hpp:17: /usr/i686-w64-mingw32/local/include/boost/filesystem/operations.hpp:80:9: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/filesystem/operations.hpp:92:9: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/filesystem/operations.hpp:105:9: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/filesystem/operations.hpp:132:9: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/filesystem/operations.hpp:1005:11: error: cannot use 'throw' with exceptions disabled BOOST_FILESYSTEM_THROW(filesystem_error( ^ /usr/i686-w64-mingw32/local/include/boost/filesystem/config.hpp:46:36: note: expanded from macro 'BOOST_FILESYSTEM_THROW' #define BOOST_FILESYSTEM_THROW(EX) throw EX ^ In file included from reprod.cpp:2: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2.hpp:16: /usr/i686-w64-mingw32/local/include/boost/signals2/deconstruct_ptr.hpp:43:9: error: cannot use 'try' with exceptions disabled try ^ In file included from reprod.cpp:2: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2.hpp:18: /usr/i686-w64-mingw32/local/include/boost/signals2/last_value.hpp:45:11: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/signals2/last_value.hpp:66:11: error: cannot use 'try' with exceptions disabled try ^ In file included from reprod.cpp:2: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2.hpp:19: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2/signal.hpp:28: /usr/i686-w64-mingw32/local/include/boost/signals2/detail/slot_call_iterator.hpp:87:15: error: cannot use 'throw' with exceptions disabled throw; ^ /usr/i686-w64-mingw32/local/include/boost/signals2/detail/slot_call_iterator.hpp:80:13: error: cannot use 'try' with exceptions disabled try ^ In file included from reprod.cpp:2: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2.hpp:19: In file included from /usr/i686-w64-mingw32/local/include/boost/signals2/signal.hpp:29: /usr/i686-w64-mingw32/local/include/boost/signals2/optional_last_value.hpp:32:11: error: cannot use 'try' with exceptions disabled try ^ /usr/i686-w64-mingw32/local/include/boost/signals2/optional_last_value.hpp:53:11: error: cannot use 'try' with exceptions disabled try ^ 12 errors generated. }}}" Bugs closed To Be Determined filesystem Boost 1.57.0 Problem fixed