CMake无法链接Clion中的Boost正则表达式库 我试图获得Boost 1.72版本，准备在我的C++项目中使用。操作系统是Windows10。我使用Clion作为IDE，使用CMake 3.17和gcc 8.1.0作为工具链。我尝试在web上按照许多不同的说明正确地“安装”Boost，最后我完成了以下步骤（所有斜体文件夹名称都是有效的完全限定路径）：

解压缩Boost源代码，转到boostsources目录/tools/build，运行bootstrap.bat gcc

然后运行b2安装--prefix=“提供的boost构建文件夹”

然后将提供的boost build folder/bin添加到PATH变量

返回boostsources目录并运行b2--build dir=“boostsources dir\build”--prefix=“boostinstall dir”toolset=gcc安装--build type=complete-j4

现在我在boost安装目录中有了“include”和“lib”文件夹。我打开Clion并在Clion设置中为CMake添加参数：

我的CMakeLists.txt如下：

cmake_minimum_required(VERSION 3.14)
project(DBMSProject)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_FLAGS "--coverage")

find_package(Boost)
# I also tried to use the line below instead of a line above, but it gave me a strange error
# "Could NOT find Boost (missing: regex) (found version "1.72.0")"
# find_package(Boost REQUIRED COMPONENTS regex)

include_directories(${Boost_INCLUDE_DIRS})

add_executable(DBMSProject main.cpp /* some other stuff */)
target_link_libraries(DBMSProject -static)
#target_link_libraries(DBMSProject ${Boost_LIBRARIES})  # that didn't work
target_link_libraries(DBMSProject Boost::boost ${Boost_REGEX_LIBRARY})  # neither that does

只需main.cpp中的一些示例代码，查看编译和链接是否有效：

/* Other headers */
#include <boost/regex.hpp>
. . .

int main() {
    std::string line;
    boost::regex pat( "^Subject: (Re: |Aw: )*(.*)" );

    while (std::cin)
    {
        std::getline(std::cin, line);
        boost::smatch matches;
        if (boost::regex_match(line, matches, pat))
            std::cout << matches[2] << std::endl;
    }
}

/*其他标题*/
#包括
. . .
int main（）{
std：：字符串行；
boost：：regex pat（“^Subject:（Re:| Aw:）*（*）”；
while（std：：cin）
{
std:：getline（std:：cin，line）；
小比赛；
if（boost:：regex_匹配（行、匹配、pat））
std:：cout我终于让它工作了。我的CMakeLists.txt现在看起来如下：

cmake_minimum_required(VERSION 3.14)
project(DBMSProject)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_FLAGS "--coverage")
set(CMAKE_PREFIX_PATH ${BOOST_LIBRARYDIR}\\cmake)

find_package(Boost CONFIG REQUIRED COMPONENTS regex)
include_directories(${Boost_INCLUDE_DIRS})

add_executable(DBMSProject main.cpp /* stuff */)
target_link_libraries(DBMSProject -static)
#target_link_libraries(DBMSProject ${Boost_LIBRARIES}) # haven't tried that but I think it might work as well
target_link_libraries(DBMSProject Boost::regex)

另外，如果我不在CMakeLists.txt中使用-DBOOST…参数，我就不需要CMake的参数，所以我从中排除了-DBOOST_INCLUDEDIR和-DBOOST_ROOT。
当使用
find_包（Boost-CONFIG-REQUIRED-COMPONENTS-regex）时会发生什么
？对于最新的CMake和Boost版本，使用
CONFIG
模式查找Boost是最干净的，使用导入的Boost目标
Boost:：regex
@squareskittles，这是另一个错误。“找不到”Boost提供的包配置文件。”使用以下任意名称：BoostConfig.cmake boost-config.cmake将安装前缀“boost”添加到cmake_prefix_路径，或将“boost_DIR”设置到包含上述文件之一的目录。如果“boost”提供单独的开发包或SDK，请确保已安装。“还尝试按如下方式使用target_link_libraries（）命令：target_link_libraries（DBMSProject-static-Lboost install dir\\lib\\libboost_regex-mgw81-mt-d-x64-1_72.dll）但是if给了我同样的链接错误。是的，你应该在你的CMAKE中设置变量
CMAKE_PREFIX_PATH
，指向
b2
构建Boost库的位置。那里应该有一个BoostConfig.CMAKE文件。@squareskittles现在好多了（我开始理解了），我发现我的boost安装目录实际上包含boost的所有CMake配置，但CMake继续抱怨：找到了包配置文件：boost安装目录/lib/CMake/boost_regex-1.72.0/boost_regex-config.CMake，但它将boost_regex_found设置为FALSE，所以包“boost_regex”被认为未找到。package://给出的原因未找到合适的生成变体//
[100%] Linking CXX executable DBMSProject.exe
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::cpp_regex_traits_char_layer<char>::cpp_regex_traits_char_layer(boost::re_detail_107200::cpp_regex_traits_base<char> const&)':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/cpp_regex_traits.hpp:370: undefined reference to `boost::re_detail_107200::cpp_regex_traits_char_layer<char>::init()'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::raw_storage::extend(unsigned long long)':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/regex_raw_buffer.hpp:131: undefined reference to `boost::re_detail_107200::raw_storage::resize(unsigned long long)'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::save_state_init::save_state_init(boost::re_detail_107200::saved_state**, boost::re_detail_107200::saved_state**)':
C:/Users//Douments/Programs/boost/include/boost-1_72/boost/regex/v4/perl_matcher_non_recursive.hpp:110: undefined reference to `boost::re_detail_107200::get_mem_block()'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::save_state_init::~save_state_init()':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/perl_matcher_non_recursive.hpp:118: undefined reference to `boost::re_detail_107200::put_mem_block(void*)'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_imp()':
C:/Users//ocuments/Programs/boost/include/boost-1_72/boost/regex/v4/perl_matcher_common.hpp:221: undefined reference to `boost::re_detail_107200::verify_options(unsigned int, boost::regex_constants::_match_flags)'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::unwind_extra_block(bool)':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/perl_matcher_non_recursive.hpp:1371: undefined reference to `boost::re_detail_107200::put_mem_block(void*)'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `void boost::re_detail_107200::raise_error<boost::regex_traits_wrapper<boost::regex_traits<char, boost::cpp_regex_traits<char> > > >(boost::regex_traits_wrapper<boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::error_type)':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/pattern_except.hpp:75: undefined reference to `boost::re_detail_107200::raise_runtime_error(std::runtime_error const&)'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::extend_stack()':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/perl_matcher_non_recursive.hpp:236: undefined reference to `boost::re_detail_107200::get_mem_block()'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::basic_regex_parser<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::fail(boost::regex_constants::error_type, long long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long long)':
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_parser.hpp:241: undefined reference to `boost::regex_error::regex_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::regex_constants::error_type, long long)'
C:/Users/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_parser.hpp:242: undefined reference to `boost::regex_error::raise() const'
C:/Users//Douments/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_parser.hpp:241: undefined reference to `boost::regex_error::~regex_error()'
C:/Users//v4/basic_regex_parser.hpp:241: undefined reference to `boost::regex_error::~regex_error()'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_dtail_107200::basic_regex_creator<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::fixup_recursions(boost::re_detail_107200::re_syntax_base*)':
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:785: undefined reference to `boost::regex_error::regex_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::regex_constants::error_type, long long)'
C:/Users//v4/basic_regex_creator.hpp:785: undefined reference to `boost::regex_error::~regex_error()'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:874: undefined reference to `boost::regex_error::regex_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::regex_constants::error_type, long long)'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:875: undefined reference to `boost::/Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:874: undefined reference to `boost::regex_error::~regex_error()'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:785: undefined reference to `boost::regex_error::~regex_error()'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:874: undefined reference to `boost::regex_error::~regex_error()'
CMakeFiles\DBMSProject.dir/objects.a(main.cpp.obj): In function `boost::re_detail_107200::basic_regex_creator<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::create_startmaps(boost::re_detail_107200::re_syntax_base*)':
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:940: undefined reference to `boost::regex_error::regex_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::regex_constants::error_type, long long)'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:941: undefined reference to `boost::regex_error::raise() const'
C:/Users//Documents/Programs/boost/include/boost-1_72/boost/regex/v4/basic_regex_creator.hpp:940: undefined reference to `boost::re

cmake_minimum_required(VERSION 3.14)
project(DBMSProject)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_FLAGS "--coverage")
set(CMAKE_PREFIX_PATH ${BOOST_LIBRARYDIR}\\cmake)

find_package(Boost CONFIG REQUIRED COMPONENTS regex)
include_directories(${Boost_INCLUDE_DIRS})

add_executable(DBMSProject main.cpp /* stuff */)
target_link_libraries(DBMSProject -static)
#target_link_libraries(DBMSProject ${Boost_LIBRARIES}) # haven't tried that but I think it might work as well
target_link_libraries(DBMSProject Boost::regex)