Our Visual C++ project was compiling and linking successfully when running with VS2017U2. I have made changes to a couple of make files in our project to make it compile with VS2017U8. After the change,I see that the compilation is successful but I am getting a linking error here -
2019-02-21 19:41:44 | libvcruntime.lib(std_type_info.obj) : error LNK2005: ___std_type_info_destroy_list already defined in vcruntime.lib(VCRUNTIME140.dll)
2019-02-21 19:41:44 | Creating library d:/build/ob/sb-21330799/sim-20fq1/sim/build/beta/apps/coreDump/coreDump.lib and object d:/build/ob/sb-21330799/sim-20fq1/sim/build/beta/apps/coreDump/coreDump.exp
2019-02-21 19:41:44 | coreDump.dll : fatal error LNK1169: one or more multiply defined symbols found
I have googled on this linking error (LNK2005) but what is strange is why I am getting this error after only doing VS update without doing any code changes? And how to resolve this? Any pointers on this appreciated.
Related
I tried to use a library about date time conversion in this website. However, when compiling it, errors occur:
ERROR 1 error LNK2019: mod_datetime.obj
ERROR 2 error LNK2019: libifcoremdd.lib(for_main.obj)
ERROR 3 fatal error LNK1120: 2 x64\Debug\datetime.exe
There are some similar questions (this or this), but they seems not about this "libifcoremdd.lib" problem. I find libifcoremdd.lib in my computer(C:\Program Files (x86)\Intel\Composer XE 2013 SP1\compiler\lib\ia32 and C:\Program Files (x86)\Intel\Composer XE 2013 SP1\compiler\lib\intel64), why the link process failed?
Expanding on a comment I gave above - the quoted error text omits crucial pieces of information, that being the names of the symbols the linker was unable to find. (LNK2019 is "unresolved reference"). While it's unclear what ERROR 1 is referring to, ERROR 2 is due to your taking the library sources and building them in an executable project type. This causes the linker to look for a symbol _MAIN__ (for 32-bit) that is the Fortran main program. If there is none, then you'll get a LNK2019 error naming for_main.obj in the Intel Fortran run-time library.
The solution is to create a new project in Visual Studio of the "Fortran Static Library" type, so that a main program is not expected.
I am compiling my program using VS2005. I am linking to SDL static libraries and am getting the following linker errors;
1>LIBCMTD.lib(fpinit.obj) : error LNK2005: __fltused already defined in SDL2d.lib(SDL_stdlib.obj)
1>LIBCMTD.lib(ftol2.obj) : error LNK2005: __ftol2_sse already defined in SDL2d.lib(SDL_stdlib.obj)
1> Creating library ..\..\..\product\VS2005\libs\\Standalone.lib and object ..\..\..\product\VS2005\libs\\Standalone.exp
1>..\..\..\product\VS2005\libs\\Standalone.exe : fatal error LNK1169: one or more multiply defined symbols found
I compiled SDL2d.lib using the same VS2005 compiler. My original thought was that I had mismatched runtime library settings for these projects. However after checking they are both set to Multi-Threaded Debug.
I have just noticed that the linker output above seems to be creating a Standalone.lib and Standalone.exp before making the Standalone.exe. I have no idea why it's making a .lib and .exp
Any other reasons why this error would occur?
Thanks
Needed to define HAVE_LIBC in the SDL project. This stopped the multiple redefinition of both _ftlused and _ftol2_sse
I have made sure that InteliSense is turned on and that nothing is disabled while I use the IDE. I don't see a way for me to tell where the syntax errors in my code are. When I try to build the project it just gives me that "failed" report and there are no syntax errors being reported in the error box.
http://imageshack.us/f/850/visualt.jpg/
The only errors its giving me are :
Error 2 error LNK1169: one or more multiply defined symbols found C:\Users\Artur\Documents\Visual Studio 2012\Projects\Project2\Debug\Project2.exe 1 1 Project2
Error 1 error LNK2005: _main already defined in Portfolio Program 2.obj C:\Users\Artur\Documents\Visual Studio 2012\Projects\Project2\Project2\Source.obj Project2
These don't seem to make any sense to me.
Visual Studio would normally give you syntax errors if there are any in your C++ code. The error message you're getting suggest that you're linking two modules together that both contain a definition of main(). That won't work as the linker will not be able to determine which of the two main() functions to use as an entry point into the program. So, check your linker and project dependencies.
You have source.cpp in resources. This is wrong.
It has been about a year since I wrote any .dll plugins that use LibCurl, but I decided to start on another one tonight. Unfortunately, I have been combating the same linker errors for almost 4 hours now, and I am completely lost.
I am statically building LibCurl, and it appears to be fine for the most part, except I am getting the following linker errors.
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: _calloc already defined in memoverride.obj
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: _realloc already defined in memoverride.obj
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: _free already defined in memoverride.obj
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: _malloc already defined in memoverride.obj
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: __strdup already defined in memoverride.obj
1>MSVCRT.lib(MSVCR90.dll) : error LNK2005: __malloc_crt already defined in memoverride.obj
I have tried...
1) Reorganizing my included libs due to MSDN saying LNK2005 was caused by this.
2) Rebuilding the LibCurl lib through MSVC Application, then through the Command-Line tool.
3) Excluding the libs that are causing issues.
and a bunch of other things that I cannot even remember now. Can anyone help me out with some information as to how I can solve these?
Problem was my .dll was /MT while the libcurl was /MD. Also, I had initially blocked "libcmt", so when I was switching libcurl to /MT, it was spewing errors.
Hi
I have project In VC++ 2008
this project compile in debug mode without error
but when I try to build it in release mode I get below linking erorr.
1>Linking...
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: __heap_alloc already defined in LIBCMT.lib(malloc.obj)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: __recalloc already defined in LIBCMT.lib(recalloc.obj)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: __msize already defined in LIBCMT.lib(msize.obj)
1>LIBCMTD.lib(malloc.obj) : error LNK2005: _V6_HeapAlloc already defined in LIBCMT.lib(malloc.obj)
1>LIBCMTD.lib(dbghook.obj) : error LNK2005: __crt_debugger_hook already defined in LIBCMT.lib(dbghook.obj)
1>LIBCMTD.lib(sbheap.obj) : error LNK2005: ___sbh_pHeaderDefer already defined in LIBCMT.lib(sbheap.obj)
1>LIBCMTD.lib(sbheap.obj) : error LNK2005: __get_sbh_threshold already defined in LIBCMT.lib(sbheap.obj)
1>LIBCMTD.lib(sbheap.obj) : error LNK2005: __set_sbh_threshold already defined in LIBCMT.lib(sbheap.obj)
1>LIBCMTD.lib(sbheap.obj) : error LNK2005: __set_amblksiz already defined in LIBCMT.lib(sbheap.obj)
1>LIBCMTD.lib(sbheap.obj) : error LNK2005: __get_amblksiz already defined in LIBCMT.lib(sbheap.obj)......
how I can fix it?
thanks.
You're mixing VS runtimes - Make sure the "Project Properties/C++/Code Generation/Run-time Library" setting is the same for your project and all libraries you link to.
I had the same problem as you. Reason of this problem is that Linker include a lot of libraries that you dont see (for example you will include windows.h, it includes windef.h and so on...). And because these files are not idiot-proof written (#ifndef is missing) linker will try to #define same thing more times than once - problem.
My solution was setting this field:
Project Properties -> Linker -> Input -> Ignore specific library
to "libcmt.lib"
With this your linker will ignore also in release configuration that problematic library that is included by default and everything should work.. :-)
Have a nice day.. :-)
P.S. If you want to avoid these linker misunderstandings, keep configuring project not in debug or release configuration, but in "All configuration". This option is on left upper corner of project configuration.
You are linking a .obj or .lib file that was compiled in the Debug configuration. Best thing to do is to ensure that file is built in the Release mode as well. Second best is to tell the linker to ignore the request to link to libcmtd.lib. Project + Properties, Linker, Input, Ignore Specific Library = libcmtd.lib. But only do this if you can't get the Release build of a .lib after trying mightily.
you can delete preprocessor definition "DEBUG" to solve your issue
I ran into to similar problem and it was all to do with whether libraries you include build with right end state. If you build a program in release mode and pointed to *.lib files that compiled in debug mode. its going to give you symbol miss match errors. Specially if your program build fines in debug mode or vise versa.
This might not exactly what your problem is but good information for someone who ran into same thing as i did.
You probably have defined all the link information in the "Debug" configuration. Which means you need to either redefine it for "Release" or move it to the "All Configurations" so its shared.