如何使用cmake使相对文件路径在visual studio中工作? [英] How to make relative file path work in visual studio using cmake?

问题描述

我们正在使用 CMake 开发一个 C++ 项目.在项目中，我们使用 std::ifstream 类引用一些资源文件，例如 resources/file.txt(直接位于项目文件夹内).现在的问题是，虽然我们的其他团队成员可以在使用 Linux 时引用这些文件，但我不能(我使用的是 Visual Studio 2017).

We are working on a c++ project using CMake. In the project we are referencing some resource files like resources/file.txt (located directly inside the project folder) using the std::ifstream class. The problem now is that, while our other team members can reference these files as they use Linux, I cannot (I am using Visual Studio 2017).

如何设置 CMake 或 Visual Studio，以便在不更改其路径的情况下引用这些文件?我仍然是使用 CMake 的新手，但我没有找到任何有效的方法.

How can I set up CMake or Visual Studio so I can reference these files without changing their paths? I am still a pretty big novice using CMake but I didn't find anything that worked.

显示问题的最少代码:

Minimal code showing the issue:

#include <iostream>
#include <fstream>
#include <string>

std::string read_file(std::string filename)
{
    std::string result = "";

    std::ifstream file(filename);
    if (!file.is_open())
    {
        std::cout << "Could not open file " << filename.c_str() << "." << std::endl;
        return result;
    }

    std::string line;
    while (getline(file, line))
        result += line + '\n';
    return result;
}

int main(int argc, char *argv[])
{
    std::string fileContent = read_file("src/Test_File.txt");

    if (fileContent.compare(""))
    {
        std::cout << fileContent.c_str() << std::endl;
    }

    return 0;
}

此程序应加载位于 src 文件夹内的Test_File.txt"，文件夹结构为:

This program should load the "Test_File.txt" located inside the src folder with the folder structure being:

• 源代码
  • main.cpp
  • CMakeList.txt
  • Test_File.txt

  这里的问题是程序找不到Text_File.txt，而其他团队成员没有这样的问题.绝对路径当然有效，但它们显然不是要走的路.

  The problem here is that the program cannot find the Text_File.txt while the other team members don't have such issue. Absolute paths of course work but they are obviously not the way to go.

  我已经尝试使用VS_DEBUGGER_WORKING_DIRECTORY 参数与 set_target_properties(${PROJECT_NAME} PROPERTIES VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}") 在 add_executable(${PROJECT_NAME}CMOURDIR} 后的 cpp") 但这似乎也不起作用.

  I've already tried to set the working directory using the VS_DEBUGGER_WORKING_DIRECTORY parameter with set_target_properties(${PROJECT_NAME} PROPERTIES VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}") after add_executable(${PROJECT_NAME} "${CMAKE_CURRENT_SOURCE_DIR}/main.cpp") but that does not seem to work either.

  推荐答案

  多亏了@Tsyvarev，经过多次尝试，我终于可以正常工作了.正如在这个问题中所说的那样，设置currentDir"有效.对我来说，它以前不起作用，因为 "name" 和 "projectTarget" 设置不正确.

  After some more tries I have got it working thanks to @Tsyvarev. As states in this question they brought up, setting "currentDir" worked. For me it didn't work before because "name" and "projectTarget" were improperly set.

  我现在在修复 "name" 和 "projectTarget" 值后添加了 "currentDir": "${workspaceRoot}" 并且它工作.

  I now added "currentDir": "${workspaceRoot}" after fixing the "name" and "projectTarget" values and it worked.

  这篇关于如何使用cmake使相对文件路径在visual studio中工作?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IT屋！