在vscode任务中.Json如何使用g++只编译多个文件，并应用输出使一个可执行文件?

Question

我想要实现的是将多个.cpp和.h文件的编译和链接步骤分开。像这样:g++ -c *.cpp && g++ -o main *.o。但是我想在vscode tasks.json中这样做。我尝试了以下代码:

Tasks.json

{
    "tasks": [
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",
            "command": "/usr/bin/g++",
            "args": [
                "-fdiagnostics-color=always",
                "-c",
                "${workspaceFolder}/*.cpp",
                "&& /usr/bin/g++ -o",
                "${fileDirname}/${fileBasenameNoExtension} *.o"
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "detail": "Task generated by Debugger."
        }
    ],
    "version": "2.0.0"
}

收到的错误如下:

<<h2>控制台/h2>

Starting build...
/usr/bin/g++ -fdiagnostics-color=always -c /home/raijin/Documents/Code/Cpp/test/*.cpp "&& /usr/bin/g++ -o" "/home/raijin/Documents/Code/Cpp/test/main *.o"
g++: warning: && /usr/bin/g++ -o: linker input file unused because linking not done
g++: error: && /usr/bin/g++ -o: linker input file not found: No such file or directory
g++: warning: /home/raijin/Documents/Code/Cpp/test/main *.o: linker input file unused because linking not done
g++: error: /home/raijin/Documents/Code/Cpp/test/main *.o: linker input file not found: No such file or directory

我该怎么办?

Answer 1

下面的注释建议和vscode复合任务文档。找到了一种编译和生成可执行文件的方法，代码如下:

{
    "tasks": [
        {
            "type": "cppbuild",
            "label": "c++",
            "command": "/usr/bin/g++",
            "args": [
                "-fdiagnostics-color=always",
                "-c",
                "${workspaceFolder}/*.cpp",
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": false
            },
            "detail": "Task generated by Debugger."
        },
        {
            "type": "cppbuild",
            "label": "custom cpp build",
            "command": "g++",
            "args": [
                "-fdiagnostics-color=always",
                "-g",
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}",
                "*.o"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": [
                "$gcc"
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
           "dependsOn":["c++"]
        }
    ],
    "version": "2.0.0"
}
{
    "tasks": [
        {
            "type": "cppbuild",
            "label": "c++",
            "command": "/usr/bin/g++",
            "args": [
                "-fdiagnostics-color=always",
                "-c",
                "${workspaceFolder}/*.cpp",
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": false
            },
            "detail": "Task generated by Debugger."
        },
        {
            "type": "cppbuild",
            "label": "custom cpp build",
            "command": "g++",
            "args": [
                "-fdiagnostics-color=always",
                "-g",
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}",
                "*.o"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": [
                "$gcc"
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
           "dependsOn":["c++"]
        }
    ],
    "version": "2.0.0"
}

即便如此，作为c++构建的一种方式，它也会很快变得复杂和/或未优化。从现在开始，我将按照建议使用cmake。