Author Topic: error LNK2001: unresolved external symbol __isDST@4  (Read 2408 times)

herge

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  • Posts: 480
error LNK2001: unresolved external symbol __isDST@4
« on: July 18, 2015, 07:41:11 AM »

 Hello:
 I am trying to link a C program which gives me a Day Light Savings Flag Word to a
 Assembler program. The Linking has been a Verbose pain in the butt.
 this will be a long Read.

Code: [Select]
C:\masm32\bin>link /SUBSYSTEM:CONSOLE /RELEASE /VERBOSE /MAP test.obj __isDST.ob
j > linkv.txt
I pipe it to a temp file so we can edit the temp file are you ready!
linkv.txt for Your Viewing Pleasure.

Code: [Select]
Microsoft (R) Incremental Linker Version 5.12.8078
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.


Start Pass1
Processed /DEFAULTLIB:\masm32\lib\masm32.lib
Processed /DEFAULTLIB:\masm32\lib\gdi32.lib
Processed /DEFAULTLIB:\masm32\lib\user32.lib
Processed /DEFAULTLIB:\masm32\lib\kernel32.lib
Processed /DEFAULTLIB:\masm32\lib\Comctl32.lib
Processed /DEFAULTLIB:\masm32\lib\comdlg32.lib
Processed /DEFAULTLIB:\masm32\lib\shell32.lib
Processed /DEFAULTLIB:\masm32\lib\oleaut32.lib
Processed /DEFAULTLIB:\masm32\lib\ole32.lib
Processed /DEFAULTLIB:\masm32\lib\msvcrt.lib
__isDST.obj : warning LNK4044: unrecognized option "manifestdependency:type='win32' name='Microsoft.VC90.DebugCRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b3b9a1e18e3b'"; ignored
Processed /DEFAULTLIB:uuid.lib
Processed /DEFAULTLIB:MSVCRTD
Processed /DEFAULTLIB:OLDNAMES

Searching Libraries
    Searching \masm32\lib\masm32.lib:
    Searching \masm32\lib\gdi32.lib:
    Searching \masm32\lib\user32.lib:
      Found _MessageBoxA@16
        Referenced in test.obj
        Loaded user32.lib(user32.dll)
      Found __IMPORT_DESCRIPTOR_user32
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
      Found __NULL_IMPORT_DESCRIPTOR
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
      Found user32_NULL_THUNK_DATA
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
    Searching \masm32\lib\kernel32.lib:
      Found _ExitProcess@4
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetDateFormatA@24
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetSystemTime@4
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetTimeFormatA@24
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found __IMPORT_DESCRIPTOR_kernel32
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Loaded kernel32.lib(kernel32.dll)
      Found kernel32_NULL_THUNK_DATA
        Referenced in kernel32.lib(kernel32.dll)
        Loaded kernel32.lib(kernel32.dll)
    Searching \masm32\lib\Comctl32.lib:
    Searching \masm32\lib\comdlg32.lib:
    Searching \masm32\lib\shell32.lib:
    Searching \masm32\lib\oleaut32.lib:
    Searching \masm32\lib\ole32.lib:
    Searching \masm32\lib\msvcrt.lib:
      Found __imp___localtime64
        Referenced in __isDST.obj
        Loaded msvcrt.lib(msvcrt.dll)
      Found __imp___time64
        Referenced in __isDST.obj
        Loaded msvcrt.lib(msvcrt.dll)
      Found __IMPORT_DESCRIPTOR_msvcrt
        Referenced in msvcrt.lib(msvcrt.dll)
        Referenced in msvcrt.lib(msvcrt.dll)
        Loaded msvcrt.lib(msvcrt.dll)
      Found msvcrt_NULL_THUNK_DATA
        Referenced in msvcrt.lib(msvcrt.dll)
        Loaded msvcrt.lib(msvcrt.dll)
    Searching C:\Program Files\Microsoft SDKs\Windows\v6.0A\lib\uuid.lib:
    Searching C:\Program Files\Microsoft Visual Studio 9.0\VC\LIB\MSVCRTD.lib:
      Found __RTC_CheckEsp
        Referenced in __isDST.obj
        Loaded MSVCRTD.lib(_stack_.obj)
      Found __RTC_Shutdown
        Referenced in __isDST.obj
        Loaded MSVCRTD.lib(_init_.obj)
      Found "void __cdecl _RTC_Failure(void *,int)" (?_RTC_Failure@@YAXPAXH@Z)
        Referenced in MSVCRTD.lib(_stack_.obj)
        Loaded MSVCRTD.lib(_error_.obj)
      Found __RTC_SetErrorFuncW
        Referenced in MSVCRTD.lib(_init_.obj)
        Loaded MSVCRTD.lib(_userapi_.obj)
      Found __CRT_RTC_INITW
        Referenced in MSVCRTD.lib(_init_.obj)
        Loaded MSVCRTD.lib(MSVCR90D.dll)
      Found ___security_cookie
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded MSVCRTD.lib(gs_cookie.obj)
      Found __except_handler4
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded MSVCRTD.lib(chandler4gs.obj)
      Found "int __cdecl _RTC_GetSrcLine(unsigned char *,wchar_t *,unsigned long,int *,wchar_t *,unsigned long)" (?_RTC_GetSrcLine@@YAHPAEPA_WKPAH1K@Z)
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded MSVCRTD.lib(_pdblkup_.obj)
      Found @__security_check_cookie@4
        Referenced in MSVCRTD.lib(_error_.obj)
        Referenced in MSVCRTD.lib(chandler4gs.obj)
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded MSVCRTD.lib(secchk.obj)
      Found __IMPORT_DESCRIPTOR_MSVCR90D
        Referenced in MSVCRTD.lib(MSVCR90D.dll)
        Loaded MSVCRTD.lib(MSVCR90D.dll)
      Found __except_handler4_common
        Referenced in MSVCRTD.lib(chandler4gs.obj)
        Loaded MSVCRTD.lib(MSVCR90D.dll)
      Found ___report_gsfailure
        Referenced in MSVCRTD.lib(secchk.obj)
        Loaded MSVCRTD.lib(gs_report.obj)
      Found MSVCR90D_NULL_THUNK_DATA
        Referenced in MSVCRTD.lib(MSVCR90D.dll)
        Loaded MSVCRTD.lib(MSVCR90D.dll)
      Found __crt_debugger_hook
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded MSVCRTD.lib(MSVCR90D.dll)
    Searching C:\Program Files\Microsoft Visual Studio 9.0\VC\LIB\OLDNAMES.lib:
    Searching \masm32\lib\masm32.lib:
    Searching \masm32\lib\gdi32.lib:
    Searching \masm32\lib\user32.lib:
    Searching \masm32\lib\kernel32.lib:
      Found __imp__IsDebuggerPresent@0
        Referenced in MSVCRTD.lib(_error_.obj)
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__RaiseException@16
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__DebugBreak@0
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__WideCharToMultiByte@32
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__MultiByteToWideChar@24
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__lstrlenA@4
        Referenced in MSVCRTD.lib(_error_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__GetProcAddress@8
        Referenced in MSVCRTD.lib(_error_.obj)
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__LoadLibraryA@4
        Referenced in MSVCRTD.lib(_error_.obj)
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__HeapFree@12
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__HeapAlloc@12
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__GetProcessHeap@0
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__GetModuleFileNameW@12
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__VirtualQuery@12
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__FreeLibrary@4
        Referenced in MSVCRTD.lib(_pdblkup_.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__TerminateProcess@8
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__GetCurrentProcess@0
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__UnhandledExceptionFilter@4
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded kernel32.lib(kernel32.dll)
      Found __imp__SetUnhandledExceptionFilter@4
        Referenced in MSVCRTD.lib(gs_report.obj)
        Loaded kernel32.lib(kernel32.dll)
    Searching \masm32\lib\Comctl32.lib:
    Searching \masm32\lib\comdlg32.lib:
    Searching \masm32\lib\shell32.lib:
    Searching \masm32\lib\oleaut32.lib:
    Searching \masm32\lib\ole32.lib:
    Searching \masm32\lib\msvcrt.lib:
    Searching C:\Program Files\Microsoft SDKs\Windows\v6.0A\lib\uuid.lib:

Done Searching Libraries

End Pass1

test.obj : error LNK2001: unresolved external symbol __isDST@4
test.exe : fatal error LNK1120: 1 unresolved externals


isDST.CPP
Code: [Select]
// IsDST.cpp : Defines the entry point for the console application.
//  Friday, July 17, 2015 4:20:47 PM
#include "stdafx.h"
#include <windows.h>
#include <time.h>
int __isDST(int A)
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}
int _tmain(int argc, _TCHAR* argv[])
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}

test.asm
Code: [Select]
; TEST.ASM Friday, September 20, 2013 11:21:00 PM
; Modified Friday, July 17, 2015 4:09:41 PM
       include \masm32\include\masm32rt.inc
.data
public stm
stm    SYSTEMTIME<>
public dtbuf
dtbuf db 260 dup(0)
align 8
pdwIsDST dd 0
pdt dd stm

AppName db "Datum und Uhrzeit in der deutschen: ", 0
crlf db 13, 10, 0
tf db "HH':'mm':'ss tt", 0
StartT  dd 0
__isDST PROTO:DWORD
;IsDaylightSavingTime            PROTO pdt:PTR DATETIME, pdwIsDST:PTR DWORD
.code
start proc
      mov esi, offset stm
      invoke GetSystemTime, esi; Get UTC
      mov ax, stm.wHour
      inc ax; GET UTC +1 i e CET
      mov stm.wHour, ax 
      call __isDST
      and eax,eax
      jz @F
      mov ax, stm.wHour; is Daylight Savings Time i e Summer Time
      inc ax; GET UTC +1 i e CET
      mov stm.wHour, ax 
@@:
      invoke GetDateFormat, 1031, DATE_LONGDATE, addr stm, 0, addr dtbuf, 260
      lea esi, offset dtbuf
      add esi , eax  ; eax is len of format
      mov byte ptr [ esi - 1 ] , " "
      mov StartT, esi
      INVOKE  GetTimeFormat,1031,TIME_FORCE24HOURFORMAT,addr stm, addr tf, esi,32
      invoke MessageBox, NULL, addr dtbuf, addr AppName, MB_OK
      exit
      ret
start endp
      end start

 Any Ideas Please?

Regards herge
Read "Slow Death by Rubber Duck"
for chemical Laughs.

adeyblue

  • Member
  • **
  • Posts: 89
    • Airesoft
Re: error LNK2001: unresolved external symbol __isDST@4
« Reply #1 on: July 18, 2015, 08:53:10 AM »
You didn't show how you compiled the cpp file but if you didn't add /TC to use the C compiler then you just need to add extern "C" before the function declaration. Otherwise the C++ compiler will do name mangling

Code: [Select]
extern "C" int __isDST(int a)
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}

It looks like the asm file is expecting an stdcall function though, which'd require this:
Code: [Select]
extern "C" int __stdcall __isDST(void) /* Your asm file doesn't provide an argument, with cdecl/fastcall that's fine. With stdcall it'll unbalance the stack. So I changed it to no arguments */
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}

If you are compiling with /TC then its probably just the __stdcall thing, and you wouldn't need any extern "C".

herge

  • Member
  • ***
  • Posts: 480
Re: error LNK2001: unresolved external symbol __isDST@4
« Reply #2 on: July 18, 2015, 12:43:47 PM »
Hello adeyblue:

Code: [Select]
// IsDST.cpp : Defines the entry point for the console application.
//  Friday, July 17, 2015 10:07:00 PM
#include "stdafx.h"
#include <windows.h>
#include <time.h>
extern "C" int __stdcall __isDST(int)
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}
int _tmain(int argc, _TCHAR* argv[])
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}

Well we can't get it to compile?

Code: [Select]
1>------ Build started: Project: IsDST, Configuration: Debug Win32 ------
1>Compiling...
1>IsDST.cpp
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(6) : error C2059: syntax error : 'string'
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(17) : error C2065: 'tm' : undeclared identifier
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(17) : error C2065: 'P' : undeclared identifier
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(17) : warning C4047: '=' : 'int' differs in levels of indirection from 'tm *'
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(17) : error C2106: '=' : left operand must be l-value
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(18) : error C2065: 'P' : undeclared identifier
1>c:\documents and settings\owner\my documents\visual studio 2008\projects\isdst\isdst\isdst.cpp(18) : error C2223: left of '->tm_isdst' must point to struct/union
1>Build log was saved at "file://c:\Documents and Settings\Owner\My Documents\Visual Studio 2008\Projects\IsDST\IsDST\Debug\BuildLog.htm"
1>IsDST - 6 error(s), 1 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Regards herge
Regards herge
Read "Slow Death by Rubber Duck"
for chemical Laughs.

herge

  • Member
  • ***
  • Posts: 480
Re: error LNK2001: unresolved external symbol __isDST@4
« Reply #3 on: July 18, 2015, 08:13:05 PM »
Hi:

 We have moved on but can't get past the Linking.
Code: [Select]
Microsoft (R) Incremental Linker Version 5.12.8078
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.


Start Pass1
Processed /DEFAULTLIB:\masm32\lib\masm32.lib
Processed /DEFAULTLIB:\masm32\lib\gdi32.lib
Processed /DEFAULTLIB:\masm32\lib\user32.lib
Processed /DEFAULTLIB:\masm32\lib\kernel32.lib
Processed /DEFAULTLIB:\masm32\lib\Comctl32.lib
Processed /DEFAULTLIB:\masm32\lib\comdlg32.lib
Processed /DEFAULTLIB:\masm32\lib\shell32.lib
Processed /DEFAULTLIB:\masm32\lib\oleaut32.lib
Processed /DEFAULTLIB:\masm32\lib\ole32.lib
Processed /DEFAULTLIB:\masm32\lib\msvcrt.lib
__isDST.obj : warning LNK4044: unrecognized option "manifestdependency:type='win32' name='Microsoft.VC90.DebugCRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b3b9a1e18e3b'"; ignored
Processed /DEFAULTLIB:uuid.lib
Processed /DEFAULTLIB:MSVCRTD
Processed /DEFAULTLIB:OLDNAMES

Searching Libraries
    Searching \masm32\lib\masm32.lib:
    Searching \masm32\lib\gdi32.lib:
    Searching \masm32\lib\user32.lib:
      Found _MessageBoxA@16
        Referenced in test.obj
        Loaded user32.lib(user32.dll)
      Found __IMPORT_DESCRIPTOR_user32
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
      Found __NULL_IMPORT_DESCRIPTOR
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
      Found user32_NULL_THUNK_DATA
        Referenced in user32.lib(user32.dll)
        Loaded user32.lib(user32.dll)
    Searching \masm32\lib\kernel32.lib:
      Found _ExitProcess@4
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetDateFormatA@24
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetSystemTime@4
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found _GetTimeFormatA@24
        Referenced in test.obj
        Loaded kernel32.lib(kernel32.dll)
      Found __IMPORT_DESCRIPTOR_kernel32
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Referenced in kernel32.lib(kernel32.dll)
        Loaded kernel32.lib(kernel32.dll)
      Found kernel32_NULL_THUNK_DATA
        Referenced in kernel32.lib(kernel32.dll)
        Loaded kernel32.lib(kernel32.dll)
    Searching \masm32\lib\Comctl32.lib:
    Searching \masm32\lib\comdlg32.lib:
    Searching \masm32\lib\shell32.lib:
    Searching \masm32\lib\oleaut32.lib:
    Searching \masm32\lib\ole32.lib:
    Searching \masm32\lib\msvcrt.lib:
      Found __imp___localtime64
        Referenced in __isDST.obj
        Loaded msvcrt.lib(msvcrt.dll)
      Found __imp___time64
        Referenced in __isDST.obj
        Loaded msvcrt.lib(msvcrt.dll)
      Found __IMPORT_DESCRIPTOR_msvcrt
        Referenced in msvcrt.lib(msvcrt.dll)
        Referenced in msvcrt.lib(msvcrt.dll)
        Loaded msvcrt.lib(msvcrt.dll)
      Found msvcrt_NULL_THUNK_DATA
        Referenced in msvcrt.lib(msvcrt.dll)
        Loaded msvcrt.lib(msvcrt.dll)
    Searching C:\Program Files\Microsoft SDK\Lib\.\uuid.lib:
LINK : fatal error LNK1104: cannot open file "MSVCRTD.lib"

We have a few "MSVCTD.LIB" s

Code: [Select]
// __IsDST.cpp : Defines the entry point for the console application.
//  Friday, July 17, 2015 4:20:47 PM
#include "stdafx.h"
#include <windows.h>
#include <time.h>
extern "C" int __stdcall  __isDST(int A)
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}
int _tmain(int argc, _TCHAR* argv[])
{
time_t t;
t = time(0);
    tm* P = localtime ( &t );
return P->tm_isdst;
}


Regards Herge
Regards herge
Read "Slow Death by Rubber Duck"
for chemical Laughs.