我无法在窗口平台中使用 pthread [英] I can't use pthread in window platform

问题描述

我的环境是 Windows8.1(64 位)并使用 Visual Studio 2010.

My env is Windows8.1 (64bit) and using Visual Studio 2010.

我确实把所有 *.dll 文件放在 system32 、SYSWOW64 中(因为我使用的是 win8 64 位.)

I did put all *.dll files in system32 , SYSWOW64(because I use win8 64bit.)

和链接位置，用于 x64 系统和 VC 2010 的 *.lib 文件.

and link location where *.lib file for x64-system with VC 2010.

当然，我添加了额外的文件夹 lib forders.. ，包括文件夹.. 等..

of course, I add additional folder lib forders.. , include folders.. etc..

但是当我尝试编译pthread-used"项目时，发生了致命错误.

but when I try compile "pthread-used" project, fatal error has occur.

-来源

#include<pthread.h>
#include<stdio.h>
int doit_id,trd_id;
pthread_t trd;
void *doit(void *data){
    doit_id = (int)data;
    return 0;
}
int main(){
    trd_id=pthread_create(&trd,NULL,doit,0);
    return (0);
}

-错误

1.obj : error LNK2019: unresolved external symbol __imp__pthread_create (referenced in function _main)
C:\Users\~program Location~ : fatal error LNK1120: 1 unresolved externals

请帮帮我

推荐答案

您的 main() 正在寻找名称 __imp__pthread_create 的事实表明您正在构建您的 32 位目标项目.

The fact that your main() is looking for the name __imp__pthread_create indicates that you're building your project for a 32-bit target.

64 位 Win32 pthread 库具有 pthread_create() 的导入符号，名称为:

The 64-bit Win32 pthread library has a import symbol for pthread_create() with the name:

__imp_pthread_create

32 位 Win32 pthread 库具有:

The 32-bit Win32 pthread libary has:

__imp__pthread_create

注意 32 位库中的额外下划线 - 它与您的 main() 正在寻找的名称约定相匹配，因此这表明您正在为 32 位目标构建.额外的下划线是 x86 构建如何在 Win32 pthread 库使用的 cdecl 调用约定中处理名称的一部分.x64 不使用 cdecl 调用约定(x64 只有一个调用约定)并且下划线不在 x64 构建中的符号前面.

Note the extra underscore in the 32-bit lib - that matches the name convention that your main() is looking for, so it's an indication that you're building for a 32-bit target. The extra underscore is part of how x86 builds treat names in the cdecl calling convention used by the Win32 pthread library. x64 doesn't use a cdecl calling convention (x64 has only a single calling convention) and underscores are not prepended to symbols in x64 builds.

我认为您需要下载或构建 32 位 pthread 库，或者更改您的项目配置以构建 64 位目标.

I think you need to either download or build the 32-bit pthread library or change your project configuration to build for a 64-bit target.

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