出于学习目的,我使用/nodefaultlib 构建了一个可执行文件,但我觉得我在 winmain 之前的入口点中做了一些错误的事情,因为每当我使用虚拟方法时,我都会收到链接器错误:
error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)
这是我的入口点:
typedef void (__cdecl *_PVFV)(void);
typedef int (__cdecl *_PIFV)(void);
// Standard C++ Runtime (STD CRT) __xc_a points to beginning of initializer table
#pragma data_seg(".CRT$XCA")
_PVFV __xc_a[] = { 0 };
// Standard C++ Runtime (STD CRT) __xc_z points to end of initializer table
#pragma data_seg(".CRT$XCZ")
_PVFV __xc_z[] = { 0 };
#pragma data_seg(".CRT$XIA")
_PIFV __xi_a[] = {0};
#pragma data_seg(".CRT$XIZ")
_PIFV __xi_z[] = {0};
#pragma data_seg(".CRT$XPA")
_PVFV __xp_a[] = {0};
#pragma data_seg(".CRT$XPZ")
_PVFV __xp_z[] = {0};
#pragma data_seg(".CRT$XTA")
_PVFV __xt_a[] = {0};
#pragma data_seg(".CRT$XTZ")
_PVFV __xt_z[] = {0};
#pragma data_seg()
#pragma comment(linker, "/MERGE:.CRT=.rdata")
#pragma comment(linker, "/MERGE:.rdata=.data")
// function pointer table to global deinitializer table
static _PVFV * pf_atexitlist = 0;
// Maximum entries allowed in table
static unsigned max_atexitlist_entries = 32;
// Current amount of entries in table //
static unsigned cur_atexitlist_entries = 0;
void __cdecl _initterm ( _PVFV *pfbegin, _PVFV *pfend )
{
for ( ; pfbegin < pfend; pfbegin++ )
{
if ( *pfbegin != nullptr ) (**pfbegin)();
}
}
void _cdecl Exit () {
// Go through the list, and execute all global exit routines
while (cur_atexitlist_entries--) {
// execute function
(*(--pf_atexitlist)) ();
}
}
void _cdecl InitializeConstructors()
{
_initterm(__xc_a, __xc_z);
}
int WINAPI __tmainCRTStartup(void)
{
//This is obviously lacking
InitializeConstructors();
WinMain((HINSTANCE)0x400000,0,0,0);
Exit ();
return 0;
}
我觉得__tmainCRTStartup中有一些非常明显的错误,因为我相信我已经完成了dll而不是exe的初始化。但我仍然对我所缺少的东西感到有点迷失。
最佳答案
找到答案,需要在编译时使用/GR- 禁用运行时类型信息
关于c++ - 非常具体的未解析外部符号 type_info::`vftable 在/NODEFAULTLIB 可执行文件中使用虚拟函数时,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30146374/