使用 CMake 构建 cpp-netlib

Question

我已经下载了 cpp-netlib 源代码，将其解压缩到一个文件夹中，但由于某种原因我完全迷路了。我仔细阅读了文档，它说我也必须下载 CMake，我已经下载了。然后我设置源目录和构建目录，单击 "Generate" 按钮后我得到了这个输出：

The CXX compiler identification is MSVC 19.0.23506.0
Check for working C compiler using: Visual Studio 14 2015
Check for working C compiler using: Visual Studio 14 2015 -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Check for working CXX compiler using: Visual Studio 14 2015
Check for working CXX compiler using: Visual Studio 14 2015 -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
CMake Error at C:/Program Files (x86)/CMake/share/cmake-3.5/Modules/FindBoost.cmake:1657 (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:49 (find_package)


Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR (missing:  OPENSSL_LIBRARIES OPENSSL_INCLUDE_DIR) 
Looking for pthread.h
Looking for pthread.h - not found
Found Threads: TRUE  
CMake Error at CMakeLists.txt:131 (export):
  export given target "cppnetlib-client-connections" which is not built by
  this project.


Configuring incomplete, errors occurred!
See also "C:/Users/Nick/Documents/cpp-netlib/cpp-netlib-build/CMakeFiles/CMakeOutput.log".
See also "C:/Users/Nick/Documents/cpp-netlib/cpp-netlib-build/CMakeFiles/CMakeError.log"

找不到 Boost 库，这就是我遇到的问题。我安装了 boost，但我不知道在哪里设置 "BOOST_ROOT"。我对此做了一些研究，尝试使用带有 -DBOOST_ROOT 选项的命令行，如下所示：

c:\Program Files>cmake -DBOOST_ROOT=/boost/boost_1_55_0

但是它给我以下错误：

CMake Error: The source directory "C:/Program Files" does not appear to contain
CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.

我真的不确定现在该做什么，我觉得我的问题还没有结束...有什么明显的我遗漏的吗？

Answer 1

您需要从源代码树（包含 CMakeLists.txt）中运行 cmake，或者更典型的是，从构建文件夹中运行 cmake 并告诉它在哪里源树群岛一个常见的情况是在源代码树旁边创建一个构建文件夹并运行ning cmake ../sourcedir.

您似乎最初使用的是图形用户界面；这肯定提供了一种设置 BOOST_ROOT 变量的方法吗？

或者，如果您只是将提升放在 VC++ include/lib 路径中（在 vc 目录中，或通过设置 %INCLUDE%/%LIB%），你可能不需要 BOOST_ROOT。 OpenSSL 也一样。

使用 CMake 构建 cpp-netlib

Building cpp-netlib with CMake

c++

cpp-netlib