在我的项目中,我最近决定使用boost :: thread.我的代码在Linux下编译得很好,但在Windows下(x86或x64),我在gcc 4.5中得到以下警告：

In file included from C:\Boost\include\boost-1_44/boost/thread/shared_mutex.hpp:14:0,
                 from C:\Boost\include\boost-1_44/boost/thread/detail/thread_group.hpp:9,
                 from C:\Boost\include\boost-1_44/boost/thread/thread.hpp:24,
                 from C:\Boost\include\boost-1_44/boost/thread.hpp:13,
                 from include\systools/upnp_control_point.hpp:50,
                 from src\upnp_control_point.cpp:45:
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp: In member function 'T boost::shared_mutex::interlocked_
compare_exchange(T*, T, T) [with T = boost::shared_mutex::state_data]':
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp:110:103:   instantiated from here
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp:50:99: error: dereferencing type-punned pointer will bre
ak strict-aliasing rules
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp:50:99: error: dereferencing type-punned pointer will bre
ak strict-aliasing rules
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp:51:52: error: dereferencing type-punned pointer will bre
ak strict-aliasing rules
C:\Boost\include\boost-1_44/boost/thread/win32/shared_mutex.hpp:51:52: error: dereferencing type-punned pointer will bre
ak strict-aliasing rules
In file included from C:\Boost\include\boost-1_44/boost/algorithm/string/detail/find_format.hpp:18:0,
                 from C:\Boost\include\boost-1_44/boost/algorithm/string/find_format.hpp:23,
                 from C:\Boost\include\boost-1_44/boost/algorithm/string/replace.hpp:22,
                 from C:\Boost\include\boost-1_44/boost/date_time/date_facet.hpp:17,
                 from C:\Boost\include\boost-1_44/boost/date_time/gregorian/gregorian_io.hpp:16,
                 from C:\Boost\include\boost-1_44/boost/date_time/gregorian/gregorian.hpp:31,
                 from C:\Boost\include\boost-1_44/boost/date_time/posix_time/time_formatters.hpp:12,
                 from C:\Boost\include\boost-1_44/boost/date_time/posix_time/posix_time.hpp:24,
                 from include\systools/upnp_device.hpp:51,
                 from include\systools/upnp_control_point.hpp:48,
                 from src\upnp_control_point.cpp:45:
C:\Boost\include\boost-1_44/boost/algorithm/string/detail/find_format_store.hpp: At global scope:
C:\Boost\include\boost-1_44/boost/algorithm/string/detail/find_format_store.hpp: In instantiation of 'bool boost::algori
thm::detail::check_find_result(InputT&, FindResultT&) [with InputT = std::basic_string<char>, FindResultT = boost::itera
tor_range<__gnu_cxx::__normal_iterator<char*, std::basic_string<char> > >]':
C:\Boost\include\boost-1_44/boost/algorithm/string/detail/find_format_all.hpp:259:17:   instantiated from 'void boost::a
lgorithm::detail::find_format_all_impl(InputT&, FinderT, FormatterT, FindResultT) [with InputT = std::basic_string<char>
, FinderT = boost::algorithm::detail::first_finderF<const char*, boost::algorithm::is_equal>, FormatterT = boost::algori
thm::detail::const_formatF<boost::iterator_range<const char*> >, FindResultT = boost::iterator_range<__gnu_cxx::__normal
_iterator<char*, std::basic_string<char> > >]'
C:\Boost\include\boost-1_44/boost/algorithm/string/find_format.hpp:268:13:   instantiated from 'void boost::algorithm::f
ind_format_all(SequenceT&, FinderT, FormatterT) [with SequenceT = std::basic_string<char>, FinderT = boost::algorithm::d
etail::first_finderF<const char*, boost::algorithm::is_equal>, FormatterT = boost::algorithm::detail::const_formatF<boos
t::iterator_range<const char*> >]'
C:\Boost\include\boost-1_44/boost/algorithm/string/replace.hpp:654:13:   instantiated from 'void boost::algorithm::repla
ce_all(SequenceT&, const Range1T&, const Range2T&) [with SequenceT = std::basic_string<char>, Range1T = char [15], Range
2T = char [1]]'
C:\Boost\include\boost-1_44/boost/units/detail/utility.hpp:50:51:   instantiated from here
C:\Boost\include\boost-1_44/boost/algorithm/string/detail/find_format_store.hpp:74:18: error: unused parameter 'Input'
scons: *** [src\upnp_control_point.o] Error 1
scons: building terminated because of errors.

我刚才包括< boost / thread.hpp>在我自己的.cpp文件中,没什么特别的.

由于我无法控制boost的代码,有没有办法暂时禁止这些警告？就像是：

#super_killing_macro_that_disable_some_warnings
#include <boost/thread.hpp>
#its_all_good_know_i_want_my_warnings_back

我能做什么 ？

解决方法:

我刚刚发现了-isystem选项,它允许将目录包含为系统目录.没有警告从目录中的文件中发出,因此它对我的任务来说似乎是完美的.

此外,这有一个很好的副作用,使SCons在依赖树中也忽略这些目录.由于我不希望这些库经常更改,所以没关系.