all.
I’m compiling Ipopt-3.9.3 in Windows 10 & Visual C++ 2010 Express.
I’ve built the projects of libCoinBlas, libConHSL, libCoinLapack as well as libIpopt, and generated libCoinBlas.lib, libCoinHSL.lib, libCoinLapack.lib as well as libIpopt.lib in the correct paths but with some warnings.
While when I tried to build the projects of IpoptAmplSolver and hs071_cpp, there exists the following fatal errors.
5> Generating Code...
5> Creating library Release\IpoptAmplSolver.lib and object Release\IpoptAmplSolver.exp
5>dlarf.obj : error LNK2019: unresolved external symbol _iladlr_ referenced in function _dlarf_
5>dlarfb.obj : error LNK2001: unresolved external symbol _iladlr_
5>dlarf.obj : error LNK2019: unresolved external symbol _iladlc_ referenced in function _dlarf_
5>dlarfb.obj : error LNK2001: unresolved external symbol _iladlc_
5>dlascl.obj : error LNK2019: unresolved external symbol _disnan_ referenced in function _dlascl_
5>dpotf2.obj : error LNK2001: unresolved external symbol _disnan_
5>Release\IpoptAmplSolver.exe : fatal error LNK1120: 3 unresolved externals
========== Rebuild All: 4 succeeded, 1 failed, 0 skipped ==========
5>------ Rebuild All started: Project: hs071_cpp, Configuration: Release Win32 ------
5> hs071_main.cpp
5> hs071_nlp.cpp
5> Generating Code...
5>dlarf.obj : error LNK2019: unresolved external symbol _iladlr_ referenced in function _dlarf_
5>dlarfb.obj : error LNK2001: unresolved external symbol _iladlr_
5>dlarf.obj : error LNK2019: unresolved external symbol _iladlc_ referenced in function _dlarf_
5>dlarfb.obj : error LNK2001: unresolved external symbol _iladlc_
5>dlascl.obj : error LNK2019: unresolved external symbol _disnan_ referenced in function _dlascl_
5>dpotf2.obj : error LNK2001: unresolved external symbol _disnan_
5>LIBCMT.lib(wincrt0.obj) : error LNK2019: unresolved external symbol _WinMain#16 referenced in function ___tmainCRTStartup
5>Release\hs071_cpp.exe : fatal error LNK1120: 4 unresolved externals
========== Rebuild All: 4 succeeded, 1 failed, 0 skipped ==========
Is there anyone who can kindly tell me how should I deal with it?
Thank you very much for your attention, and I’m looking forward to your kind aid.
Finally, I've solved this problem which is due to the undefined functions. I think my case is about a released software package rather than some specific procedure code, hence, it's a little different and relative simple.
Without knowing the specifics of the libraries you are using, I recommend that you try the following to deal with this error:
The error tells you that the linker is missing code for some function calls. This probably means that a library file is not found. Make sure that the linker can find all needed lib files. Check the property pages. Under the Linker->General->Additional library directories, make sure that the directories where your lib-files are located are present and under Linker->Input->Additional dependencies, make sure that the the lib-files are listed. Also make sure that the parameters are present for the different Configurations.
If this still does not help, check if your libraries depend on other libraries. These should be mentioned in the documentation of the libraries you are using.
I've not built this, but here's what I would try from the start. From what you've said, you've compiled the .lib files that it links against and it's failing during linking.
So here are your options...
1) You've either missed a .lib file in the input list for the linker.
2) The actual .lib file doesn't contain the symbol that the linker needs (you can check this by dumping the symbols of the .lib file)
3) Your .lib file is compiled with either the wrong platform than what you're linking with or with the wrong type ie. release/debug.
4) The symbols in your lib are decorated because you're compiling as C++ instead of C, or visa-versa.
If you go through the above steps above, I'm pretty sure you'll find your problem, but you've not really given enough information to properly answer your question. Personally, I'd have a guess that you're compiling C as C++ or you've got the wrong platform type set for one of your lib files.
Thank you all very much for your patient and detailed advices that inspired me, and I finally find out that I should add some C files which define the necessary functions into my project. The detailed solution is as follows.
For example, I want to eliminate
5>dlarf.obj : error LNK2019: unresolved external symbol _iladlr_ referenced in function _dlarf_
5>dlarfb.obj : error LNK2001: unresolved external symbol _iladlr_
Step 1: Run
f2c iladlr.f
In the Visual Stuido Command Prompt and generate iladlr.c.
Step 2: Add iladlr.c to my project.
Step 3: Rebuild.
Finally, everything goes well.
I am getting the following LINK error while compiling my C++ solution:
error LNK2019: unresolved external symbol _Direct3DCreate9Ex#8
referenced in function "protected: XYX()
The symbol "Direct3DCreate9Ex' is defined in "ddraw.h" header file found in "C:\Program Files\Microsoft SDKs\Windows\v7.0\Include". And verified that the header file "ddraw.h" is present in this location. Also I have included this path in VS settings "Tools-->Options-->VC++ Directories -> Includes".
But still I am getting the link error as "error LNK2019: unresolved external symbol _Direct3DCreate9Ex#8 referenced in function "protected: XYX()" ".
Can anyone kindly help me in getting rid of this link error while compiling my C++ solution.
I am using VS 2008 on 64 bit Win7.
Thanks in advance.
Based on reference page for Direct3DCreate9Ex you need to link with D3D9.lib.
I've been thrown a bit in the deep-end with a C++ app I need to get running and I cant get it to build.
It appears that just about error source file throws out this error:
BindActivView.obj : error LNK2001 : unresolved external symbol "public: void __thiscall CNOLEError::AddError(struct IUnknown *,struct _GUID const &:" (?AddError#CNOLEError##QAEXPAUIUnknown##ABU_GUID###Z)
Could someone please point me in the right direction with how I go about fixing this?
You omit some obj/lib file in your project.
You probably use some lib files which need to be linked together with your output.
I have some link error problems when trying to compile using jrtplib and jthread on my simple project. The errors are:
Error 4 fatal error LNK1120: 3 unresolved externals C:\Users\Chicko\Desktop\tryout\Debug\tryout.exe
Error 1 error LNK2019: unresolved external symbol "public: virtual __thiscall RTPSession::~RTPSession(void)" (??1RTPSession##UAE#XZ) referenced in function _wmain tryout.obj
Error 2 error LNK2019: unresolved external symbol "public: __thiscall RTPSessionParams::RTPSessionParams(void)" (??0RTPSessionParams##QAE#XZ) referenced in function _wmain tryout.obj
Error 3 error LNK2019: unresolved external symbol "public: __thiscall RTPSession::RTPSession(class RTPRandom *,class RTPMemoryManager *)" (??0RTPSession##QAE#PAVRTPRandom##PAVRTPMemoryManager###Z) referenced in function _wmain tryout.obj
and here is my main program:
// tryout.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <rtpsession.h> //Confused to put "" or <>
#include <rtpsessionparams.h>
#include <rtpudpv4transmitter.h>
int _tmain(int argc, _TCHAR* argv[])
{
RTPSession session;
RTPSessionParams sessionparams;
RTPUDPv4TransmissionParams transparams;
sessionparams.SetOwnTimestampUnit(1.0/8000.0);
transparams.SetPortbase(8000);
return 0;
}
For your information, I do not import any header file from those libraries into my project. I use additional include libraries in the project setting and put `"..\jlib\jthread-1.2.1\src";"..\jlib\jrtplib3.8.2\src" (this is the folder where all the headers are stored). How do I fix this? Where should i put jrtplib.lib and jthread.lib? Please help...
Have you added jrtplib.lib and jthread.lib under your project linker options?
You can do this on the project property page under
"Configuration properties->Linker->Input->Additional Dependencies" and make sure that the directory that contains the lib files has been added to your library path: Either on the project properties
"Linker->General->Additional Library Directories"
or under the global VS settings (Doesn't apply to VC2010)
"Tools->Options" "Projects and Solutions->VC++ Directories->Library Files"
Under VC2010 you'll have to edit the property sheet of the project.
I see that it's a bit late to answer and I'm not so expert on Windows (I'm more a Linux user), but some day ago I've tried JRTPLIB on Windows and I had the same problem when I compiled the example in release mode and the lib in debug mode (I see that you use the debug mode). Hope it can help.
While trying to compile program, that uses zlib, i got following errors:
Error 1 error LNK2019: unresolved
external symbol _compress referenced
in function "void __cdecl
save_image_in_pakfile(class
std::basic_ofstream > &,struct
_IplImage *)" (?save_image_in_pakfile##YAXAAV?$basic_ofstream#DU?$char_traits#D#std###std##PAU_IplImage###Z) buffer_management.obj
Error 2 error LNK2001: unresolved
external symbol
_compress fern_based_point_classifier.obj
And two more same errors but related to uncompress function.
I use the vs2008 C++, and at the project properties I added in
C/C++ : Additional include directories the path to header files of zlib.
And at linker properties I added at additional dependencies:
zlibwapi.lib and zlibstat.lib files.
How to resolv the problem?
If I made some mistakes please show me them..