Xcode OSX上的C ++构建失败，出现多个错误文件IO ...不可用:在macOS 10.15中引入 [英] C++ Build Failed on Xcode OSX with multiple errors File IO ... is unavailable: introduced in macOS 10.15

问题描述

每当我尝试在Mac上的Xcode上构建代码时，都会收到以下错误消息.

I am getting the following error whenever I try to build my code on Xcode on my Mac.

我当前的系统:
macOS:版本10.15.1(19B88)
Xcode:版本11.2.1(11B500)

My current system:
macOS: version 10.15.1 (19B88)
Xcode: Version 11.2.1 (11B500)

我的错误:

'path'不可用:在macOS 10.15中引入
'current_path'不可用:macOS 10.15中引入的
'operator/'不可用:在macOS 10.15中引入
'路径'不可用:macOS 10.15中引入的
'path'不可用:在macOS 10.15中引入

'path' is unavailable: introduced in macOS 10.15
'current_path' is unavailable: introduced in macOS 10.15
'operator/' is unavailable: introduced in macOS 10.15
'path' is unavailable: introduced in macOS 10.15
'path' is unavailable: introduced in macOS 10.15

main.cpp

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <filesystem>

using namespace std;

int main(int argc, char* argv[])
{
    cout << "being exectued from:" << endl;
    cout << argv[0] << endl;

    std::__fs::filesystem::path cwd = std::__fs::filesystem::current_path() / "filename.txt"; // C++17
    cout << "but the input.txt and output.txt files should be be in the following directory:" << endl;
    cout << cwd.string() << endl << endl;

在终端上运行g++后，我得到

After running g++ on terminal I get

c声:错误:没有输入文件

clang: error: no input files

运行g++ --version之后，我得到

使用以下命令配置--prefix =/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir =/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer /SDKs/MacOSX.sdk/usr/include/c++/4.2.1 Apple clang版本11.0.0(clang-1100.0.33.12) 目标:x86_64-apple-darwin19.0.0 螺纹型号:posix InstalledDir:/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1 Apple clang version 11.0.0 (clang-1100.0.33.12) Target: x86_64-apple-darwin19.0.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

推荐答案

使用SDK 10.15，Xcode 11并启用C ++ 17编译器可以解决此问题.

Using SDK 10.15, Xcode 11 and and enabling C++17 compiler solved this issue.

要启用C ++ 17，请点击以下链接:在以下位置启用C ++ 17 Xcode，macOS

To enable C++17, followi this link: Enable C++17 on Xcode, macOS

在您的Xcode上，从常规"设置中选择 10.15 SDK作为部署目标，您就可以开始使用了.

On your Xcode, from General setting, select 10.15 SDK as Deployment Target and you are good to go for .

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