c++ - 在 Visual Studio Code 中编译 C++ 代码时如何设置 bigobj 选项？

Question

我的问题:我正在用 C++ 编写一个国际象棋引擎。编写国际象棋引擎的一部分是处理非常大的数字(可以想象高达 2^63)。我有一个正在为我的项目运行单元测试的文件，当我尝试运行构建任务以将其编译为可执行文件时，出现以下错误:

C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/as.exe: C:\Users\chopi\AppData\Local\Temp\ccEvO3si.o: too many sections (32782)
C:\Users\chopi\AppData\Local\Temp\ccCF1XuS.s: Assembler messages:
C:\Users\chopi\AppData\Local\Temp\ccCF1XuS.s: Fatal error: can't write 293 bytes to section .text of C:\Users\chopi\AppData\Local\Temp\ccEvO3si.o: 'File too big'
C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/as.exe: C:\Users\chopi\AppData\Local\Temp\ccEvO3si.o: too many sections (32782)
C:\Users\chopi\AppData\Local\Temp\ccCF1XuS.s: Fatal error: can't close C:\Users\chopi\AppData\Local\Temp\ccEvO3si.o: File too big
The terminal process "C:\windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command & 'C:\Program Files\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin\g++.exe' -g c:\Users\chopi\Desktop\chess-engine\maestro-tests\main.cpp -o c:\Users\chopi\Desktop\chess-engine\maestro-tests\main.exe" terminated with exit code: 1.

基本上，章节太多了。所以我去寻找答案并 find many places explaining如何为 Visual Studio 配置 bigobj，但不为 Visual Studio Code 配置。

我尝试过的:它应该像传递 /bigobj、-bigobj 或同时传递 -Wa 和 -mbig-obj 一样简单> 作为编译时的选项。因此，我尝试了一些应该但没有的方法，在启用大对象的情况下编译我的代码。这是我的 tasks.json 的样子:

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "shell",
            "label": "C/C++: g++.exe build active file",
            "command": "C:\\Program Files\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
            "args": [
                "-g",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe"
            ],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}

但我也尝试过:

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "shell",
            "label": "C/C++: g++.exe build active file",
            "command": "C:\\Program Files\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
            "args": [
                "-g",
                "-bigobj",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe"
            ],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}

和

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "shell",
            "label": "C/C++: g++.exe build active file",
            "command": "C:\\Program Files\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
            "args": [
                "-g",
                "-Wa",
                "-mbig-obj",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe"
            ],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}

...等等。

这些配置会产生 g++.exe 错误:错误:无法识别的命令行选项“-bigobj” 和

g++.exe: error: unrecognized command line option '-Wa'; did you mean '-W'?
g++.exe: error: unrecognized command line option '-mbig-obj'

分别。

我想知道的是:那么，有没有办法解决 Visual Studio Code 中的这个“太多部分” 错误？或者我是否必须硬着头皮为 Visual Studio 配置所有内容？

Answer 1

正如 user4581301 所建议的，我必须不将 -Wa 和 -mbig-obj 作为两个独立的选项。相反，我必须将它们保留为一个选项:-Wa,-mbig-obj。这遇到了错误，但是，根据 this answer ，添加 --% 作为第一个参数，再加上前面提到的有关选项的建议，让我的代码最终编译为可执行文件。以下是 tasks.json 更改后的样子:

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "shell",
            "label": "C/C++: g++.exe build active file",
            "command": "C:\\Program Files\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
            "args": [
                "--%",
                "-g",
                "-Wa,-mbig-obj",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe"
            ],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}