鏈接器錯誤編譯使用Boost.Thread使用Boost.Thread鏈接到靜態庫的可執行文件

Question

我有一個名爲MyAwesomeLib的靜態庫。它是建立與下面的CMakeLists.txt

PROJECT(MyAwesomeLib) 

find_package(OpenCV) 
find_package(VTK REQUIRED) 
find_package(OpenGL) 
find_package(GLUT) 

set(Boost_USE_STATIC_LIBS ON) 
set(Boost_USE_MULTITHREADED ON) 
set(Boost_USE_STATIC_RUNTIME OFF) 
FIND_PACKAGE(Boost COMPONENTS thread) 

if(NOT Boost_FOUND) 
message(SEND_ERROR "Cannot find Boost Thread") 
endif(NOT Boost_FOUND) 

link_directories (${Boost_LIBRARY_DIRS}) 
include_directories(${Boost_INCLUDE_DIR} ${GLUT_INCLUDE_DIR}) 

INCLUDE(${VTK_USE_FILE}) 

file(GLOB SRCS "*.cpp" "*.c") 
file(GLOB HDRS "*.h") 
add_library(MyAwesomeLib STATIC ${SRCS} ${HDRS}) 
target_link_libraries(MyAwesomeLib ${OpenCV_LIBS} ${Boost_LIBRARIES} ${GLUT_LIBRARY} ${OPENGL_LIBRARY}) 

現在我想建立MyAwesomeExecutable從MyAwesomeLib需要的符號。可執行文件和庫都使用Boost.Thread（線程組和線程類）。

PROJECT(MyAwesomeExecutable) 

FIND_PACKAGE(OpenCV REQUIRED) 
FIND_PACKAGE(VTK REQUIRED) 

set(Boost_USE_STATIC_LIBS ON) 
set(Boost_USE_MULTITHREADED ON) 
set(Boost_USE_STATIC_RUNTIME OFF) 
FIND_PACKAGE(Boost COMPONENTS thread) 

if(NOT Boost_FOUND) 
message(SEND_ERROR "Cannot find Boost Thread") 
endif(NOT Boost_FOUND) 

link_directories (${Boost_LIBRARY_DIRS}) 
include_directories(${Boost_INCLUDE_DIR} ${GLUT_INCLUDE_DIR}) 

INCLUDE(${VTK_USE_FILE}) 

FILE(GLOB SRCS "*.cpp" "*.c") 
FILE(GLOB HDRS "*.h") 

ADD_EXECUTABLE(MyAwesomeExecutable ${SRCS} ${HDRS}) 
TARGET_LINK_LIBRARIES(MyAwesomeExecutable MyAwesomeLib ${Boost_LIBRARIES} ${GLUT_LIBRARY} ${OPENGL_LIBRARY} ${OpenCV_LIBS}) 

當我建立MyAwesomeExecutable，Visual Studio 2010中建立的依賴MyAwesomeLib自動。 MyAwesomeLib建立得很好。但是，建設MyAwesomeExecutable給出以下鏈接錯誤：

2>MyAwesomeExecutable.obj : error LNK2019: unresolved external symbol "public: void __cdecl boost::thread::join(void)" (?join@thread@boost@@QEAAXXZ) referenced in function "public: void __cdecl boost::thread_group::join_all(void)" (?join_all@thread_group@boost@@QEAAXXZ) 
2>MyAwesomeLib.lib(Face.obj) : error LNK2001: unresolved external symbol "public: void __cdecl boost::thread::join(void)" (?join@thread@boost@@QEAAXXZ) 
2>MyAwesomeExecutable.obj : error LNK2019: unresolved external symbol "public: __cdecl boost::thread::~thread(void)" (??1thread@boost@@QEAA@XZ) referenced in function "public: void * __cdecl boost::thread::`scalar deleting destructor'(unsigned int)" (??_Gthread@boost@@QEAAPEAXI@Z) 
2>MyAwesomeLib.lib(Face.obj) : error LNK2001: unresolved external symbol "public: __cdecl boost::thread::~thread(void)" (??1thread@boost@@QEAA@XZ) 
2>MyAwesomeExecutable.obj : error LNK2019: unresolved external symbol "private: void __cdecl boost::thread::start_thread(void)" (?start_thread@thread@boost@@AEAAXXZ) referenced in function "public: __cdecl boost::thread::thread<class boost::_bi::bind_t<void,void (__cdecl*)(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >),class boost::_bi::list1<class boost::_bi::value<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > > >(class boost::_bi::bind_t<void,void (__cdecl*)(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >),class boost::_bi::list1<class boost::_bi::value<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > >,struct boost::thread::dummy *)" (??$?0V?$bind_t@XP6AXV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@ZV?$list1@V?$value@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@_bi@boost@@@_bi@boost@@@_bi@boost@@@thread@boost@@QEAA@V?$bind_t@XP6AXV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@ZV?$list1@V?$value@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@_bi@boost@@@_bi@boost@@@_bi@1@PEAUdummy@01@@Z) 
2>MyAwesomeLib.lib(Face.obj) : error LNK2001: unresolved external symbol "private: void __cdecl boost::thread::start_thread(void)" (?start_thread@thread@boost@@AEAAXXZ) 

Answer 1

靜態庫只是一個目標文件的集合。它可以很好地編譯，因爲它不使用未定義的符號。可以進行多項檢查以確保增強庫與您的庫真正連接。請做，提供一些更多的信息。

1.使用cmake輸出Boost_LIBRARY_DIRS和Boost_INCLUDE_DIRS的值來檢查鏈接的增強庫。

2.查看cmake生成的link.txt文件。這個文件是爲像庫或可執行文件這樣的每個目標生成的，並且在Linux上被放置在buildir/path/to/target/folder/CMakeFiles/targetName.dir/link.txt之下。 link.txt包含編譯命令來構建和鏈接可執行文件。有了它，你可以檢查，增強線程庫是否實際鏈接到您的可執行文件。在VSlink.txt沒有生成，正如在這個答案的評論中所說。然後你可以檢查使用VS本身的鏈接器命令行。