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 <boost/filesystem.hpp>
  #include <boost/signals2.hpp>
}}}
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