C++ Boost:对boost :: system :: generic_category()的未定义引用

Question

我试图Boost在我的项目中包含库,并且一直面临着相同的问题.我在使用Codeblocks IDE的Ubuntu 12.10上,尝试手动从站点读取指令来安装库,但是在使用头文件以及使用前构建的库时出现了错误.

然后我通过terminalby安装了库sudo apt-get install libboost-all-dev.在此之后,在我的Codeblocks程序中,我可以包含标题,#include <boost/regex.hpp>但是当我尝试包含Filesystem库(#include "boost/filesystem/operations.hpp" )的标题时,我收到以下错误:

/usr/include/boost/system/error_code.hpp|214|undefined reference to boost::system::generic_category()'|

我不知道如何解决此错误(特别是在Linux上的Codeblocks中).我真的可以在这里使用一些帮助.

编译器:Gcc
程序代码:仅尝试包含上述文件系统operations.hpp文件.

从Codeblocks构建日志:

Build started on: 20-11-2012 at 18:02.53
Build ended on: 20-11-2012 at 18:02.54
-------------- Build: Debug in libopenFrameworks ---------------
Target is up to date.
-------------- Build: Debug in reader1 ---------------
make -s -f Makefile Debug
linking i686 bin/reader1_debug linux
obj/i686Debug/src/testApp.o: In function `__static_initialization_and_destruction_0':
/usr/include/boost/system/error_code.hpp:214: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:215: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:216: undefined reference to `boost::system::system_category()'
obj/i686Debug/src/main.o: In function `__static_initialization_and_destruction_0':
/usr/include/boost/system/error_code.hpp:214: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:215: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:216: undefined reference to `boost::system::system_category()'
collect2: ld returned 1 exit status
make: *** [bin/reader1_debug] Error 1
Process terminated with status 2 (0 minutes, 1 seconds)
6 errors, 0 warnings

Answer 1

你应该在libboost_system图书馆里链接.我不确定代码块,但是你平台上的g ++命令行选项会是

-lboost_system

Answer 2

根据boost版本,libboost-system附带-mt后缀,该后缀应指示库多线程功能.

所以如果-lboost_system链接器找不到就试试-lboost_system-mt.

Answer 3

这是一个链接器问题.将静态库路径包含到项目中.

对于Qt Creator,打开项目文件.pro并添加以下行:

LIBS += -L<path for boost libraries in the system> -lboost_system

在我的情况下Ubuntu x86_64:

LIBS += -L/usr/lib/x86_64-linux-gnu -lboost_system

对于Codeblocks,打开Settings->Compiler...->Linker设置选项卡并添加:

boost_system

到链接库文本小部件和按下OK按钮.

Answer 4

我也搜索了一个解决方案,我遇到的答案都没有解决错误,直到我找到了"ViRuSTriNiTy"给这个帖子的答案:对'boost :: system :: generic_category()'的未定义引用？

根据该答案,尝试将这些行添加到您的cmake文件中:

find_package(Boost 1.55.0 REQUIRED COMPONENTS system filesystem)
include_directories(... ${Boost_INCLUDE_DIRS})
link_directories(... ${Boost_LIBRARY_DIRS})
target_link_libraries(... ${Boost_LIBRARIES})

Answer 5

构建简单的 boost 示例时遇到同样的问题，在我将 g++ 编译器标志从-std=c++14更改为-std=c++11后解决。

我注意到这是一个 C++11 示例......

Answer 6

这个答案实际上在使用 Boost 和 cmake 时有所帮助。

添加add_definitions(-DBOOST_ERROR_CODE_HEADER_ONLY)cmake 文件。

我的 CMakeLists.txt 看起来像这样：

cmake_minimum_required(VERSION 3.12)
project(proj)

set(CMAKE_CXX_STANDARD 17)


set(SHARED_DIR "${CMAKE_SOURCE_DIR}/../shared")

set(BOOST_LATEST_DIR            "${SHARED_DIR}/boost_1_68_0")
set(BOOST_LATEST_BIN_DIR        "${BOOST_LATEST_DIR}/stage/lib")
set(BOOST_LATEST_INCLUDE_DIR    "${BOOST_LATEST_DIR}/boost")
set(BOOST_SYSTEM                "${BOOST_LATEST_BIN_DIR}/libboost_system.so")
set(BOOST_FS                    "${BOOST_LATEST_BIN_DIR}/libboost_filesystem.so")
set(BOOST_THREAD                "${BOOST_LATEST_BIN_DIR}/libboost_thread.so")

set(HYRISE_SQL_PARSER_DIR           "${SHARED_DIR}/hyrise_sql_parser")
set(HYRISE_SQL_PARSER_BIN_DIR       "${HYRISE_SQL_PARSER_DIR}")
set(HYRISE_SQL_PARSER_INCLUDE_DIR   "${HYRISE_SQL_PARSER_DIR}/src")
set(HYRISE_SQLPARSER                "${HYRISE_SQL_PARSER_BIN_DIR}/libsqlparser.so")


include_directories(${CMAKE_SOURCE_DIR} ${BOOST_LATEST_INCLUDE_DIR} ${HYRISE_SQL_PARSER_INCLUDE_DIR})

set(BOOST_LIBRARYDIR "/usr/lib/x86_64-linux-gnu/")
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME OFF)

add_definitions(-DBOOST_ERROR_CODE_HEADER_ONLY)

find_package(Boost 1.68.0 REQUIRED COMPONENTS system thread filesystem)

add_executable(proj main.cpp row/row.cpp row/row.h table/table.cpp table/table.h page/page.cpp page/page.h
        processor/processor.cpp processor/processor.h engine_instance.cpp engine_instance.h utils.h
        meta_command.h terminal/terminal.cpp terminal/terminal.h)


if(Boost_FOUND)
    include_directories(${Boost_INCLUDE_DIRS})
    target_link_libraries(proj PUBLIC Boost::system Boost::filesystem Boost::thread ${HYRISE_SQLPARSER})
endif()