Compiling framework with a linked c++ object file

  • I am trying to compile a framework with the cl compiler and I am linking an object file which was written in c++. Problem is that everything compiles fine if I just declare a standard string in my object file but I get error messages when I initialize a std::string. I suspect I am missing the .lib files, is this correct? If yes, where can I find them?

    Compiler Output:

    LINK /nologo /NODEFAULTLIB /OPT:NOREF /NXCOMPAT /DynamicBase /out:lmflex.exe lmflex.obj C:\Users\ldeppler\Desktop\testobj.obj vendor_hostid.o bj lm_new.obj lmgr_trl.lib libsb.lib libcrvs.lib libredir_std.lib libredir_std.lib legacy_stdio_wide_specifiers.lib legacy_stdio_definitions.lib libv cruntime.lib libucrt.lib oldnames.lib kernel32.lib user32.lib netapi32.lib gdi32.lib comdlg32.lib comctl32.lib wsock32.lib shell32.lib Rpcrt4.lib oleaut32.lib Ole32.lib Wbemuuid.lib wintrust.lib crypt32.lib Ws2_32.lib iphlpapi.lib Psapi.lib advapi32.lib Shlwapi.lib dhcpcsvc.lib userenv.lib atls. lib libcmt.lib lmgr_dongle_stub.lib .\activation\lib\libnoact.lib testobj.obj : error LNK2019: Verweis auf nicht aufgel÷stes externes Symbol ""void __cdecl std::_Xbad_alloc(void)" (?_Xbad_alloc@std@@YAXXZ)" in Funkti on ""void * __cdecl std::_Allocate(unsigned __int64,unsigned __int64,bool)" (?_Allocate@std@@YAPEAX_K0_N@Z)". testobj.obj : error LNK2019: Verweis auf nicht aufgel÷stes externes Symbol ""void __cdecl std::_Xlength_error(char const *)" (?_Xlength_error@std@@YAX PEBD@Z)" in Funktion ""public: static void __cdecl std::basic_string,class std::allocator >::Xlen(void)" (? Xlen@?basic_string@DU?basic\_string@DU?char_traits@D@std@@V?$allocator@D@2@@std@@SAXXZ)". lmflex.exe : fatal error LNK1120: 2 nicht aufgel÷ste Externe

    Here is my .cpp file

    #include <winsock2.h>
    #include <limits.h>
    #include <Windows.h>
    #include <string>
    #include <sstream>
    #include <iphlpapi.h>
    #include <stdio.h>
    #include <sstream>
    #include <iostream>
    #include <stdlib.h>
    #include <vector>
    #include <AclAPI.h>
    #include <WinBase.h>
    #include <Sddl.h>
    #include <Windows.h>
    #include <DSRole.h>
    #include <codecvt>
    #include <atlbase.h>
    #include <tchar.h>
    #include <FileAPI.h>
    #include <WinIoCtl.h>
    #include <WinIoCtl.h>
    #include "compositeit4e.h"
    #include <fstream>
    #include <iomanip>
    #include <atlstr.h>
    #include <algorithm>
    #include <atlbase.h>
    #pragma comment(lib, "netapi32.lib")
    #pragma comment(lib, "Advapi32.lib")
    #pragma comment(lib, "IPHLPAPI.lib")
    #define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
    #define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
    #define INFO_BUFFER_SIZE 32767
    DWORD  bufCharCount = INFO_BUFFER_SIZE;
    TCHAR szGroupName[UNLEN];
    TCHAR szDomainName[DNLEN];
    DWORD cchGroupName = UNLEN;
    DWORD cchDomainName = DNLEN;
    DWORD dwLogicalDrives, x;
    TCHAR szRoot[32];
    SHFILEINFO shInfo;
    DISK_GEOMETRY pdg = { 0 }; // disk drive geometry structure
    BOOL bResult = FALSE;      // generic results flag
    ULONGLONG DiskSize = 0;    // size of the drive, in bytes
    using std::endl;
    #ifdef _UNICODE
    typedef std::wstring tstring;
    #define tcout std::wcout
    #define tcin std::wcin
    typedef std::string tstring;
    #define tcout std::cout
    #define tcin std::cin
    const char* getComputername()
            //vector for the computername
            std::string computername ="hello";
            std::string myComputerName;
            const char* new_string;
            //get and print computername
            if (GetComputerName(infoBuf, &bufCharCount)) {
                //save computername to string
                //std::wstring_convert<std::codecvt_utf8<wchar_t>> myconv;
                //myComputerName = myconv.to_bytes(infoBuf);
                //computername = static_cast<wchar_t>(bufCharCount);                
                //WideCharToMultiByte(CP_ACP, 0, infoBuf, wcslen(infoBuf) + 1, new_string, sizeof(new_string), NULL, NULL);
                //new_string = new char[computername.length() +1];
                //strcpy(new_string, computername.c_str());
            new_string = reinterpret_cast<const char*>(infoBuf);
            bufCharCount = 32767;
            return new_string;
    Here is my header file:
    #ifdef __cplusplus
    extern "C" {
        const char* getComputername();
    #ifdef __cplusplus

    Here is part of my .c file with the includes and the function which calls the function of my object file:

    #include "lmclient.h"
    #include "lm_attr.h"
    #include "string.h"
    #include "compositeit4e.h"
    short idtype;
        HOSTID *h = l_new_hostid();
        memset(h, 0, sizeof(HOSTID));
            if (idtype == VENDEF_ID_TYPE)
                    h->type = VENDEF_ID_TYPE;
                     const char* testComposite = getComputername();
                    strncpy(h->id.vendor, testComposite, MAX_HOSTID_LEN);   /* LONGNAMES */
                    h->id.vendor[MAX_HOSTID_LEN] = 0;
            return((HOSTID *) NULL);

    By the way my .obj file is compiled liked that:

    cl /EHsc /c /MT /I. testobj.cpp

  • Mod

    Sounds like one of these happened:
    * You are trying to link libraries that were built using sufficiently different compiler settings. Could for example be a conflict between debug and release versions.
    * You are missing a library. The NODEFAULTLIB looks suspicious, as std::bad_alloc is something from the C++ standard library. I am not 100% certain what exactly this linker parameter does (as I do not use MSVC) but it sure sounds like it could be the cause of your troubles.

    PS: You are obviously using a German locale for your linker and you named yourself luce_de. This is a German speaking forum.

  • SeppJ schrieb:

    This is a German speaking forum.

    Jo, aber Stackoverflow nicht, und warum sollte man sich auch die Mühe machen, eine Frage extra nochmal zu übersetzen? 🤡

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