c++ - 哪个库包含_is_c_termination_complete

我通过将C++代码与标准库C++库链接而收到LNK2019错误。我需要知道哪些库包含功能:

is_c_termination_complete，

__acrt_initialize，

__acrt_uninitialize，

__acrt_uninitialize_critical，

__acrt_thread_attach，

__acrt_thread_detach

将其包括在链接过程中。

我正在使用MS Visual Studio社区2017和Intel Parallel Studio xe 2019 Update 1用C++编写代码，这些代码将集成到第三方软件中。第三方软件提供了一个“make”选项来编译目标文件并将它们链接在一起。

编译正常，链接提供了一个问题。

第三方软件提供了一个条目，以变量的形式提供基本的链接器选项。默认选项如下:

link_sl='LINK', '/nologo', '/NOENTRY', '/INCREMENTAL:NO', '/subsystem:console', '/machine:AMD64',
' /NODEFAULTLIB:LIBC.LIB', '/NODEFAULTLIB:LIBCMT.LIB','/DEFAULTLIB:OLDNAMES.LIB', '/DEFAULTLIB:LIBIFCOREMD.LIB', '/DEFAULTLIB:LIBIFPORTMD.LIB', '/DEFAULTLIB:LIBMMD.LIB', '/DEFAULTLIB:kernel32.lib', '/DEFAULTLIB:user32.lib', '/DEFAULTLIB:advapi32.lib','/FIXED:NO', '/dll','/def:%E', '/out:%U', '%F', '%A', '%L', '%B',
'oldnames.lib', 'user32.lib', 'ws2_32.lib', 'netapi32.lib','advapi32.lib',
'msvcrt.lib', 'vcruntime.lib', 'ucrt.lib']

链接时出现以下11个错误:

msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __vcrt_initialize referenced in function __scrt_initialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __vcrt_uninitialize referenced in function __scrt_initialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __vcrt_uninitialize_critical referenced in function __scrt_dllmain_uninitialize_critical
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __vcrt_thread_attach referenced in function __scrt_dllmain_crt_thread_attach
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __vcrt_thread_detach referenced in function __scrt_dllmain_crt_thread_attach
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _is_c_termination_complete referenced in function __scrt_dllmain_uninitialize_c
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_initialize referenced in function __scrt_initialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_uninitialize referenced in function __scrt_uninitialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_uninitialize_critical referenced in function __scrt_dllmain_uninitialize_critical
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_thread_attach referenced in function __scrt_dllmain_crt_thread_attach
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_thread_detach referenced in function __scrt_dllmain_crt_thread_detach

这基本上意味着我没有包括所有必需的库。
我已经发现在选项中包含库'libvcruntime.lib'可以将错误减少到6个。因此，使用:

link_sl='LINK', '/nologo', '/NOENTRY', '/INCREMENTAL:NO', '/subsystem:console', '/machine:AMD64',
' /NODEFAULTLIB:LIBC.LIB', '/NODEFAULTLIB:LIBCMT.LIB','/DEFAULTLIB:OLDNAMES.LIB', '/DEFAULTLIB:LIBIFCOREMD.LIB', '/DEFAULTLIB:LIBIFPORTMD.LIB', '/DEFAULTLIB:LIBMMD.LIB', '/DEFAULTLIB:kernel32.lib', '/DEFAULTLIB:user32.lib', '/DEFAULTLIB:advapi32.lib','/FIXED:NO', '/dll','/def:%E', '/out:%U', '%F', '%A', '%L', '%B',
'oldnames.lib', 'user32.lib', 'ws2_32.lib', 'netapi32.lib','advapi32.lib',
'msvcrt.lib', 'vcruntime.lib', 'ucrt.lib',**'libvcruntime.lib'**]

结果是:

msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _is_c_termination_complete referenced in function __scrt_dllmain_uninitialize_c
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_initialize referenced in function __scrt_initialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_uninitialize referenced in function __scrt_uninitialize_crt
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_uninitialize_critical referenced in function __scrt_dllmain_uninitialize_critical
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_thread_attach referenced in function __scrt_dllmain_crt_thread_attach
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol __acrt_thread_detach referenced in function __scrt_dllmain_crt_thread_detach

我还需要在链接过程中包括哪些其他库来解决这些问题？

最佳答案

我们遇到了完全相同的问题。通过在Visual Studio中创建一个简单的控制台项目，我们发现以下代码:

#include <stdio.h>
extern "C" {
    int _is_c_termination_complete(...);
    int __acrt_initialize(...);
    int __acrt_uninitialize(...);
}


int main()
{
    if(_is_c_termination_complete())
    {
        __acrt_initialize();
    }
    fprintf(stdout, "Hello world\n");
    return 0;
}

在拆卸时变成了这个。

main:
<snip>
00007FF68B44194A  call        __scrt_stub_for_is_c_termination_complete (07FF68B441140h)
00007FF68B44194F  test        eax,eax
00007FF68B441951  je          main+38h (07FF68B441958h)
00007FF68B441953  call        __acrt_initialize (07FF68B441393h)
00007FF68B441958  mov         ecx,1
00007FF68B44195D  call        qword ptr [__imp___acrt_iob_func (07FF68B4502F0h)]
00007FF68B441963  lea         rdx,[string "Hello world\n" (07FF68B449C28h)]
00007FF68B44196A  mov         rcx,rax
00007FF68B44196D  call        fprintf (07FF68B44119Ah)
00007FF68B441972  xor         eax,eax
00007FF68B441974  lea         rsp,[rbp+0C8h]
00007FF68B44197B  pop         rdi
00007FF68B44197C  pop         rbp

链接器显然将_is_c_termination_complete重写为__scrt_stub_for_is_c_termination_complete。据我们所知，函数_is_c_termination_complete在任何特定crt中都不存在。不同的crt似乎具有不同的实现，链接器似乎会根据链接的目标重写这些实现。

对于我们来说，从链接行中删除/ NOENTRY选项可修复6个错误。显然，/ NOENTRY阻止链接器提取crt的实现。

显然，/ NOENTRY实际上意味着没有代码，而我们绝对有。

https://docs.microsoft.com/en-us/cpp/build/reference/noentry-no-entry-point?view=vs-2019

关于c++ - 哪个库包含_is_c_termination_complete，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54124505/