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      1. 在 CMakeList.txt 文件中包含 OpenSSL

        时间:2023-08-27
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                  本文介绍了在 CMakeList.txt 文件中包含 OpenSSL的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我有一个问题要问在 C++ 中使用 CMakeList.txt 的人.我想使用 Podofo 项目(一个解析和创建 pdf 的项目).

                  I have a question for people who work with CMakeList.txt in C++. I want to use Podofo project (a project to parse & create pdf).

                  所以我的主要功能很简单:

                  So my main function is simple as:

                  #include <iostream>
                  #include <podofo/podofo.h>
                  
                  int main() {
                    PoDoFo::PdfMemDocument pdf;
                    pdf.Load("/Users/user/path/to.pdf");
                  
                    int nbOfPage = pdf.GetPageCount();
                  
                    std::cout << "Our pdf have " << nbOfPage << " pages." << std::endl;
                    return 0;
                  }
                  

                  我的 CMakeList.txt 是:

                  My CMakeList.txt is:

                  cmake_minimum_required(VERSION 3.7)
                  project(untitled)
                  
                  set(CMAKE_CXX_STANDARD 14)
                  
                  set(SOURCE_FILES main.cpp)
                  
                  add_executable(untitled ${SOURCE_FILES})
                  

                  但我被这个错误困住了:

                  But I am stuck with this error:

                  /usr/local/include/podofo/base/PdfEncrypt.h:44:10: fatal error: 'openssl/opensslconf.h' file not found
                  #include <openssl/opensslconf.h
                  

                  我尝试使用 find_packagefind_library 来包含 .. 设置了一些变量,但我没有找到方法.

                  I tried to include with find_package, find_library .. setting some variables but I do not find the way.

                  我的环境是:

                  • macOS
                  • 克里昂
                  • Podofo 通过 home-brew 安装在 /usr/local/podofo
                  • OpenSSL 通过 home-brew 安装在 /usr/local/opt/openssl

                  感谢提前社区!!

                  推荐答案

                  find_package 是正确的做法;您可以在此处找到有关它的详细信息.

                  find_package is the correct approach; you find details about it here.

                  在您的情况下,您应该添加以下几行:

                  In your case, you should add these lines:

                  find_package(OpenSSL REQUIRED)
                  target_link_libraries(untitled OpenSSL::SSL)
                  

                  如果CMake没有直接找到OpenSSL,你应该设置CMake变量OPENSSL_ROOT_DIR.

                  If CMake doesn't find OpenSSL directly, you should set the CMake variable OPENSSL_ROOT_DIR.

                  这篇关于在 CMakeList.txt 文件中包含 OpenSSL的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

                  上一篇:使用“实验/文件系统"构建项目;使用 cmake 下一篇:为什么不是命令“cmake".生成makefile?

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