Error Lnk2019 Unresolved External
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Error Lnk2019 Unresolved External Symbol Public __thiscall Referenced In Function _main
Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads error lnk2019 unresolved external symbol _main referenced in function ___tmaincrtstartup with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, error lnk2019 unresolved external symbol void __cdecl just like you, helping each other. Join them; it only takes a minute: Sign up How to solve the error LNK2019: unresolved external symbol - function? up vote 36 down vote favorite 10 I get this error, but I don't know how to fix it. I'm using Visual Studio 2013. I make the solution name MyProjectTest
Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
This is the structure of my test solution: -function.h #ifndef MY_FUNCTION_H #define MY_FUNCTION_H int multiple(int x, int y); #endif -function.cpp #include "function.h" int multiple(int x, int y){ return x*y; } -main.cpp #include
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Error Lnk2019 Unresolved External Symbol Referenced In Function
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C++ Projects that Use LabWindows™/CVI™ Functions? Primary Software: LabWindows/CVI Development Systems>>LabWindows/CVI Base Package Primary Software Version: 2009 SP1 Primary Software Fixed Version: N/A http://digital.ni.com/public.nsf/allkb/36F561F57095CADB86257CC4006C275B Secondary Software: N/A Problem: I am trying to use LabWindows/CVI functions http://mathematica.stackexchange.com/questions/73740/error-message-lnk2019-unresolved-external-symbol-output-referenced-in-function in my Visual Studio C++ project, but when I try to compile my code I receive linking errors similar to the following:error LNK2019: unresolved external symbol How can I resolve this error? Solution: In order to compile LabWindows/CVI functions in a Visual Studio C++ program, you first error lnk2019 have to build the functions into a dynamic-link library (DLL) with an import library, and then link the import library (.lib) to your C++ project. To build the functions into a DLL and resolve the link errors, complete the following steps: Note:If the functions you are trying to use are already bundled into a DLL with an import error lnk2019 unresolved library, you can skip steps 1 through 6. If the instrument driver that includes the functions is not already loaded into LabWindows/CVI, you will need to load it by going to Instrument»Load. In the dialog box that opens, navigate to the .fp file of interest and click Load. Open the Function Tree Editor by going to File»Open»Function Tree (*.fp).In the dialog box that opens, navigate to the .fp file of interest and click Load. Create a DLL project by going to Options»Create DLL Project. Specify a path and name for your project and click Save.A message will pop up asking you if you want to load the DLL project now, similar to the dialog below. Click Yes. Before building the DLL, you will need to configure some of the build settings. First set the build target type by going toBuild»Target Typeand making sure there is a checkmark next to Dynamic Link Library. Also set the project to release mode by going to Build»Configurationand ensuring there is a checkmark next to Release. Conf
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Mathematica Questions Tags Users Badges Unanswered Ask Question _ Mathematica Stack Exchange is a question and answer site for users of Mathematica. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Error message LNK2019, unresolved external symbol _output referenced in function __tr0 up vote 0 down vote favorite I've successfully compiled the simple addtwo function predefined in Mathematica as per: MathLink dependencies: "LNK2019: unresolved external symbol _MLMain" I am now attempting to write an external function which calls a class I wrote earlier and returns a list of values using an output file called output.tm. The output file is as follows: void output P((double, double, double, double, double, double, double, double, int, int)); :Begin: :Function: output :Pattern: output[x0_Real64, t0_Real64, tend_Real64, deltat_Real64, D_Real64, p_Real64, q_Real64, finallevel_Real64, nDIM_Integer32, iterations_Integer32] :Arguments: { x0, t0, tend, deltat, D, p, q, finallevel, nDIM, iterations } :ArgumentTypes: { Real64, Real64, Real64, Real64, Real64, Real64, Real64, Real64, Integer32, Integer32 } :ReturnType: Manual :End: The relevant part of my c++ code is given here: #include "mathlink.h" using namespace std; extern void output(MLINK mlp, double x0, double t0, double tend, double deltat, double D, double p, double q, double finallevel, int nDIM, int iterations); class Solver() { etc. etc. } void output(MLINK mlp, double x0, double t0, double tend, double deltat, double D, double p, double q, double finallevel, int nDIM, int iterations) { Solver s(x0, D, t0, tend, deltat, finallevel, p, q, nDIM); s.PropagationDelayDistributionSolver(iterations); MLPutReal64List(mlp, s.returntau(), iterations); } Where s.returntau returns an array of doubles from the class (again, the details aren't important). When I compile this code, I only get one error: Error 2 $\quad \quad$ error LNK2019: unresolved external symbol _output referenced in function __tr0 C:\Users\SOM874\Documents\Visual Studio 2010\Projects\PDS5\PDS5\output.obj $\quad \quad$ PDS5 I don't see anything wrong when I look at the output.c file but I am a novice, I wouldn't know what to look for. Is there anything wrong which jumps out at you? Thanks in advance. mathlink-or-wstp