C++ CMake找不到Boost 1.63 (使用CLion IDE)

Question

我确实花了6个小时在上面，在互联网上到处寻找。

这就是我所做的。我在Windows 10上使用JetBrain CLion IDE。直接下载MinGW 5.3，而不是通过CodeBlocks下载。下载Boost 1.63并解压缩。运行bootstrap.bat gcc和b2.exe toolset=gcc来构建它。在安装过程中，gcc-mingw-5.3.0出现了很多次，所以我想它们现在是有某种联系的。然后出现了一个新文件夹C:/Boost，它只包含两个文件夹: include和lib。

这是我的CMakeList.txt：

cmake_minimum_required(VERSION 3.7)
project(BoostTest)

set(CMAKE_CXX_STANDARD 11)

set(Boost_INCLUDE_DIR C:/Boost/include)
set(BOOST_LIBRARY_DIR C:/Boost/lib)
find_package(Boost COMPONENTS system filesystem REQUIRED)
include_directories(${Boost_INCLUDE_DIR})
link_directories(${Boost_LIBRARY_DIR})

set(SOURCE_FILES main.cpp)
add_executable(BoostTest ${SOURCE_FILES})

由于原始目录(我从下载中解压缩)没有名为include和lib的目录，所以我认为应该使用安装(或构建)创建的目录。然后我得到了这个错误：

CMake Error at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1169 (file):
  file STRINGS file "C:/Boost/include/boost/version.hpp" cannot be read.
Call Stack (most recent call first):
  CMakeLists.txt:8 (find_package)


CMake Warning at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:744 (message):
  Imported targets not available for Boost version 0
Call Stack (most recent call first):
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:848 (_Boost_COMPONENT_DEPENDENCIES)
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1435 (_Boost_MISSING_DEPENDENCIES)
  CMakeLists.txt:8 (find_package)


CMake Warning at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:744 (message):
  Imported targets not available for Boost version 0
Call Stack (most recent call first):
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:848 (_Boost_COMPONENT_DEPENDENCIES)
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1435 (_Boost_MISSING_DEPENDENCIES)
  CMakeLists.txt:8 (find_package)


CMake Error at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1793 (message):
  Unable to find the requested Boost libraries.

  Boost version: 0.0.0

  Boost include path: C:/Boost/include

  Could not find the following Boost libraries:

          boost_system
          boost_filesystem

  No Boost libraries were found.  You may need to set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost.
Call Stack (most recent call first):
  CMakeLists.txt:8 (find_package)


-- Configuring incomplete, errors occurred!
See also "C:/Workspace_cpp/BoostTest/cmake-build-debug/CMakeFiles/CMakeOutput.log".

您知道，CMake可以以某种方式到达这个version.hpp文件，但无法读取它。我见过不少人发同样的问题，但他们的解决方案对我都没有用。我尝试将INCLUDE_DIR和LIBRARY_DIR设置为原始目录，但一点帮助都没有。我真的很沮丧。我非常感谢任何帮助。谢谢!

更新:谢谢oLen的指点！这很有帮助。我已经将我的CMakeList.txt更新为：

set(BOOST_ROOT C:/Boost)
set(BOOST_INCLUDEDIR C:/Boost/include)
set(BOOST_LIBRARYDIR C:/Boost/lib)
find_package(Boost COMPONENTS system filesystem REQUIRED)
include_directories(${Boost_INCLUDE_DIR})
link_directories(${Boost_LIBRARY_DIR})

但是，我正在收到一条新的错误消息：

"D:\Program Files (x86)\JetBrains\CLion 2017.1\bin\cmake\bin\cmake.exe" -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - MinGW Makefiles" C:\Workspace_cpp\BoostTest
CMake Warning at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:744 (message):
  Imported targets not available for Boost version
Call Stack (most recent call first):
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:848 (_Boost_COMPONENT_DEPENDENCIES)
  D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1435 (_Boost_MISSING_DEPENDENCIES)
  CMakeLists.txt:9 (find_package)


CMake Error at D:/Program Files (x86)/JetBrains/CLion 2017.1/bin/cmake/share/cmake-3.7/Modules/FindBoost.cmake:1793 (message):
  Unable to find the requested Boost libraries.

  Unable to find the Boost header files.  Please set BOOST_ROOT to the root
  directory containing Boost or BOOST_INCLUDEDIR to the directory containing
  Boost's headers.
Call Stack (most recent call first):
  CMakeLists.txt:9 (find_package)


CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
Boost_INCLUDE_DIR (ADVANCED)

我认为它成功地定位了目录，但无法处理它。对不起，我一直在问，这些错误对我来说完全没有意义。我还可以知道我是否应该在使用之前构建Boost，因为在官方Boost Get开始页面中，它并没有说要构建它。错误消息还希望我使用set BOOST_INCLUDE_DIR。你能多放点光吗？非常感谢。

Answer 1

经过几天的研究，安装和卸载了很多次，结果发现我只是搞错了一句：

set(BOOST_INCLUDEDIR C:/boost/include/boost-1_63)

就这样！我的天啊。

Answer 2

您还没有将变量设置为正确找到Boost。

如果您查看一下FindBoost.cmake，您会看到以下内容：

本模块从变量中读取有关搜索位置的提示：## BOOST_ROOT -首选安装前缀#(或BOOSTROOT) # BOOST_INCLUDEDIR -首选目录(例如/include # BOOST_LIBRARYDIR )-首选库目录(例如/lib # Boost_NO_SYSTEM_PATHS )-设置为在这些提示变量未指定的位置禁用搜索。默认是关闭的。# Boost_ADDITIONAL_VERSIONS #-这个模块不知道的Boost版本列表# (Boost安装位置可能包含该版本)

在您的示例中，最简单的解决方案是将BOOST_ROOT设置为包含lib和include的文件夹(即C:/Boost)，或者使用正确的变量名BOOST_INCLUDEDIR和BOOST_LIBRARYDIR (而没有第二个下划线)。

带有第二个下划线的变量也存在，但它们是在搜索Boost时设置的。