我试图构建Boost 1.59协程和coroutine2示例 我使用b2（完整构建）构建了boost，并使用CMake生成VC2015项目来构建样本。
所有的coroutine样本都构建并运行得很好，但我得到 coroutine2 样本的链接错误。
我的CMakeLists.txt文件很简单，只需查找提升，包含标题并链接到提升库：
project (coroutines-samples)
cmake_minimum_required(VERSION 2.8)
find_package(Boost REQUIRED)
include_directories(${Boost_INCLUDE_DIR})
link_directories(${Boost_LIBRARY_DIRS})
add_executable(chaining.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/chaining.cpp)
add_executable(echo.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/echo.cpp)
add_executable(exception.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/exception.cpp)
add_executable(fibonacci.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/fibonacci.cpp)
add_executable(layout.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/layout.cpp)
add_executable(parallel.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/parallel.cpp)
add_executable(power.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/power.cpp)
add_executable(same_fringe.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/same_fringe.cpp)
add_executable(segmented_stack.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/segmented_stack.cpp)
add_executable(simple.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/simple.cpp)
add_executable(unwind.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/unwind.cpp)
add_executable(dice_game.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/dice_game.cpp)
add_executable(merge_arrays.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/merge_arrays.cpp)
add_executable(segmented_stack1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/segmented_stack.cpp)
add_executable(simple1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/simple.cpp)
add_executable(unwind1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/unwind.cpp)
add_executable(await_emu.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/await_emu.cpp)
add_executable(fibonacci11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/fibonacci.cpp)
add_executable(iterator_range.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/iterator_range.cpp)
add_executable(layout11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/layout.cpp)
add_executable(same_fringe11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/same_fringe.cpp)
add_executable(merge_arrays1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/symmetric/merge_arrays.cpp)
add_executable(simple2.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/symmetric/simple.cpp)
# coroutines2
add_executable(coro2_fibonacci /some/path/boost_1_59_0/libs/coroutine2/example/fibonacci.cpp)
add_executable(coro2_layout /some/path/boost_1_59_0/libs/coroutine2/example/layout.cpp)
add_executable(coro2_parser /some/path/boost_1_59_0/libs/coroutine2/example/parser.cpp)
add_executable(coro2_same_fringe /some/path/boost_1_59_0/libs/coroutine2/example/same_fringe.cpp)
add_executable(coro2_segmented /some/path/boost_1_59_0/libs/coroutine2/example/segmented.cpp)
add_executable(coro2_simple /some/path/boost_1_59_0/libs/coroutine2/example/simple.cpp)
target_link_libraries(chaining.cpp ${Boost_LIBRARIES})
target_link_libraries(echo.cpp ${Boost_LIBRARIES})
target_link_libraries(exception.cpp ${Boost_LIBRARIES})
target_link_libraries(fibonacci.cpp ${Boost_LIBRARIES})
target_link_libraries(layout.cpp ${Boost_LIBRARIES})
target_link_libraries(parallel.cpp ${Boost_LIBRARIES})
target_link_libraries(power.cpp ${Boost_LIBRARIES})
target_link_libraries(same_fringe.cpp ${Boost_LIBRARIES})
target_link_libraries(segmented_stack.cpp ${Boost_LIBRARIES})
target_link_libraries(simple.cpp ${Boost_LIBRARIES})
target_link_libraries(unwind.cpp ${Boost_LIBRARIES})
target_link_libraries(dice_game.cpp ${Boost_LIBRARIES})
target_link_libraries(merge_arrays.cpp ${Boost_LIBRARIES})
target_link_libraries(segmented_stack1.cpp ${Boost_LIBRARIES})
target_link_libraries(simple1.cpp ${Boost_LIBRARIES})
target_link_libraries(unwind1.cpp ${Boost_LIBRARIES})
target_link_libraries(await_emu.cpp ${Boost_LIBRARIES})
target_link_libraries(fibonacci11.cpp ${Boost_LIBRARIES})
target_link_libraries(iterator_range.cpp ${Boost_LIBRARIES})
target_link_libraries(layout11.cpp ${Boost_LIBRARIES})
target_link_libraries(same_fringe11.cpp ${Boost_LIBRARIES})
target_link_libraries(merge_arrays1.cpp ${Boost_LIBRARIES})
target_link_libraries(simple2.cpp ${Boost_LIBRARIES})
target_link_libraries(coro2_fibonacci ${Boost_LIBRARIES})
target_link_libraries(coro2_layout ${Boost_LIBRARIES})
target_link_libraries(coro2_parser ${Boost_LIBRARIES})
target_link_libraries(coro2_same_fringe ${Boost_LIBRARIES})
target_link_libraries(coro2_segmented ${Boost_LIBRARIES})
target_link_libraries(coro2_simple ${Boost_LIBRARIES})
链接似乎无法找到boost :: system :: system_category 这是我的错误日志：
1>------ Build started: Project: coro2_fibonacci, Configuration: Debug x64 ------
2>------ Build started: Project: coro2_layout, Configuration: Debug x64 ------
3>------ Build started: Project: coro2_parser, Configuration: Debug x64 ------
4>------ Build started: Project: coro2_same_fringe, Configuration: Debug x64 ------
5>------ Build started: Project: coro2_segmented, Configuration: Debug x64 ------
6>------ Build started: Project: coro2_simple, Configuration: Debug x64 ------
1>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
1>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_fibonacci.exe : fatal error LNK1120: 1 unresolved externals
4>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
4>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_same_fringe.exe : fatal error LNK1120: 1 unresolved externals
6>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
2>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
3>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
5>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z)
6>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_simple.exe : fatal error LNK1120: 1 unresolved externals
2>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_layout.exe : fatal error LNK1120: 1 unresolved externals
3>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_parser.exe : fatal error LNK1120: 1 unresolved externals
5>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_segmented.exe : fatal error LNK1120: 1 unresolved externals
7>------ Skipped Build: Project: ALL_BUILD, Configuration: Debug x64 ------
7>Project not selected to build for this solution configuration
========== Build: 0 succeeded, 6 failed, 25 up-to-date, 1 skipped ==========
我做错了什么？