Question

我是C ++的新手，我正在尝试使用带有以下#include的CMake编译项目：

#include <boost/test/unit_test.hpp>

我收到以下错误

undefined symbols for architecture x86_64:
"boost::unit_test::unit_test_log_t::instance()", referenced from:
___cxx_global_var_init in functions1.cpp.o
___cxx_global_var_init in functions2.cpp.o
___cxx_global_var_init in main.cpp.o
ld: symbol(s) not found for architecture x86_64

我很确定这与我的CMakeLists.txt有关，所以在这里：

cmake_minimum_required(VERSION 3.13)
project(MyProject)

set(CMAKE_CXX_STANDARD 14)

include_directories(.)
include_directories(/usr/local/include/)

add_executable(MyProject
    functions1.cpp
    functions1.h
    functions2.cpp
    functions2.h
    main.cpp
    main.h
    utillity.cpp
    utillity.h)

set(BOOST_ROOT "/usr/local/Cellar/boost/1.69.0_2")

find_package(Boost COMPONENTS filesystem system unit_test_framework REQUIRED)

#find_package(Boost 1.69.0)

if(NOT Boost_FOUND)
    message(FATAL_ERROR "Could not find boost!")
endif()

include_directories (${Boost_INCLUDE_DIRS})

我在OSX Mojave上，并使用brew install boost进行安装。我知道那里有几篇文章报告了非常相似的问题，但是似乎没有一种解决方案适合我。

编辑：

已根据以下Guillaume的建议将我的CMakeLists调整为以下内容。

make_minimum_required(VERSION 3.13)
project(MyProject)

set(CMAKE_CXX_STANDARD 14)

add_executable(MyProject
    functions1.cpp
    functions1.h
    functions2.cpp
    functions2.h
    main.cpp
    main.h
    utillity.cpp
    utillity.h)

set(BOOST_ROOT "/usr/local/Cellar/boost/1.69.0_2")

find_package(Boost COMPONENTS filesystem system test REQUIRED)

target_include_directories(MyProject PUBLIC ".")

target_link_libraries(MyProject PUBLIC
    Boost::filesystem Boost::system Boost::test)

我了解从原则上讲这是更好的方法，但是它给了我

Unable to find the requested Boost libraries.

Boost version: 1.69.0

Boost include path: /usr/local/Cellar/boost/1.69.0_2/include

Could not find the following Boost libraries:

    boost_test

Some (but not all) of the required Boost libraries were found.  You may need to install these additional Boost libraries.  Alternatively, set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.

编辑2：

曾尝试进行编辑和升级以增强1.7，但仍然具有：

Could not find a package configuration file provided by "boost_test"
(requested version 1.70.0) with any of the following names:

boost_testConfig.cmake
boost_test-config.cmake

Add the installation prefix of "boost_test" to CMAKE_PREFIX_PATH or set
"boost_test_DIR" to a directory containing one of the above files.  If
"boost_test" provides a separate development package or SDK, be sure it 
has been installed.

Answer 1

您必须正确链接以增强功能，而不是添加包含目录标志。

在cmake中链接库将应用所有必需的属性，以将boost用于目标。

首先，请不要这样做：

include_directories(.)
include_directories(/usr/local/include/)

这是在询问链接错误。它将使您能够使用未正确链接到的库的头。将引起链接错误，即使在您自己的项目中也是如此。

cmake_minimum_required(VERSION 3.13)
project(MyProject)

set(CMAKE_CXX_STANDARD 14)

add_executable(MyProject
    functions1.cpp
    functions1.h
    functions2.cpp
    functions2.h
    main.cpp
    main.h
    utillity.cpp
    utillity.h)

list(APPEND CMAKE_PREFIX_PATH "/usr/local/Cellar/boost/1.69.0_2")
set(Boost_ADDITIONAL_VERSIONS "1.69.0" "1.69")
find_package(Boost COMPONENTS filesystem system test REQUIRED)

# Not needed
#if(NOT Boost_FOUND)
#    message(FATAL_ERROR "Could not find boost!")
#endif()

# include_directories (${Boost_INCLUDE_DIRS})

target_include_directories(MyProject PUBLIC ".")

# adds include directories, definitions and link libraries
target_link_libraries(MyProject PUBLIC
    Boost::filesystem Boost::system Boost::test
)

使用CMake和Boost单元测试进行编译

1 个答案: