如何解析"printf"的符号?而不是"_printf"在win32控制台上? [英] How to resolve the symbol of "printf" instead of "_printf" on win32 console?

问题描述

测试平台是Windows 32位.

test platform is windows 32bit.

所以基本上我想在以下命令中进行汇编+链接一小段汇编代码:

So basically I want to assembly + link a snippet of assembly code in these commands:

nasm -fwin32 test.s
cl test.obj /link msvcrt.lib 

它说:

error LNK2001: unresolved external symbol printf

在我的代码中，我确实有这样的函数调用:

In my code I do have function call like this:

call printf

所以我将所有这些都更改为

So I changed all of these into

call _printf

它有效.

我不熟悉Windows上的编程，但是有什么办法可以解决 printf 的外部符号?

I am not familiar with programming on windows, but is there any way to resolve the external symbol of printf ?

因为我正在执行一些自动转换任务，所以用 _ 开始的所有函数调用的转换应该非常繁琐...

Because I am doing some automatically transform task, and transformation of all the function calls with _ begin should be very tedious...

任何人都可以给我一些帮助吗?谢谢！

Can anyone give me some help..? Thank you!

推荐答案

MSVCRT与使用Visual C ++编译的所有内容一样，都导出cdecl函数替代此行为，但是由于MSVCRT不是您的库，则无法更改.

MSVCRT, like everything compiled with Visual C++, exports cdecl functions using an underscore prefix. For your own libraries, you can override this behaviour, but since MSVCRT is not your library, you can't change that.

您确实必须使您的程序集调用使用下划线名称.但是nasm有一个选项， --prefix ，这使操作更加容易:--prefix _. (感谢弗兰克·科特勒(Frank Kotler)提到这一点.)

You really are going to have to make your assembly calls use the underscore name. But nasm has an option, --prefix, which makes this easier: --prefix _. (Thanks to Frank Kotler for mentioning this.)

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