1 Error Lnk2019
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Error 1 Error Lnk2019 Unresolved External Symbol C++
Error LNK1152 Linker Tools Error LNK1158 Linker Tools Error LNK1164 Linker Tools Error LNK1166 Linker Tools Error LNK1168 Linker Tools Error LNK1169 Linker Tools Error LNK1179 Linker Tools Error LNK1181 Linker Tools Error LNK1188 Linker Tools Error LNK1189 Linker Tools Error LNK1196 Linker Tools Error LNK1200 Linker Tools Error LNK1201 Linker Tools Error LNK1211 Linker Tools Error LNK1215 Linker Tools Error LNK1218 Linker Tools Error LNK1221 Linker Tools Error LNK1223 Linker Tools Error LNK1224 Linker Tools Error LNK1237 Linker Tools Error LNK1240 Linker Tools Error LNK1241 Linker Tools Error LNK1245 Linker Tools Error LNK1248 Linker Tools Error LNK1256 Linker Tools Error LNK1264 Linker Tools Error LNK1277 Linker Tools Error LNK1282 Linker Tools Error LNK1287 Linker Tools Error LNK1296 Linker Tools Error LNK1301 Linker Tools Error LNK1302 Linker Tools Error LNK1306 Linker Tools Error LNK1309 Linker Tools Error LNK1312 Linker Tools Error LNK1313 Linker Tools Error LNK1314 Linker Tools Error LNK1332 Linker Tools Error LNK1561 Linker Tools Error LNK2001 Linker Tools Error LNK2004 Linker Tools Error LNK2005 L
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Error 1 Error Lnk2019 Unresolved External Symbol __declspec(dllimport)
any questions you might have Meta Discuss the workings and error 1 error lnk2019 unresolved external symbol _main policies of this site About Us Learn more about Stack Overflow the company Business Learn error lnk2019 unresolved external symbol winmain@16 referenced in function ___tmaincrtstartup more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow https://msdn.microsoft.com/en-us/library/799kze2z.aspx Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to solve error LNK2019 up vote 5 down vote favorite 3 I am sending a simple email in C++. I downloaded a sample C++ program http://stackoverflow.com/questions/14890847/how-to-solve-error-lnk2019 from the below link. http://cboard.cprogramming.com/cplusplus-programming/125655-sending-simple-email-cplusplus.html The sample program seems to hit the following error when it is compiling. Please help me with solution. Error 8 error LNK2019: unresolved external symbol _send_mail referenced in function _wmain Error 9 error LNK2019: unresolved external symbol __imp__recv@16 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) Error 10 error LNK2019: unresolved external symbol __imp__connect@12 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) Error 11 error LNK2019: unresolved external symbol __imp__htons@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) Error 12 error LNK2019: unresolved external symbol __imp__socket@12 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) Error 13 error LNK2019: unresolved external symbol __imp__getprotobyname@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) Error 14 error LNK2019: unresolved external symbol __imp__gethostbyname@4 referenced in function "int __cdecl connect_to_server(char const *)" (?connect_to_server@@YAHPBD@Z) c++ linker unresolved-external lnk2019 share|improve this question edited Feb 15 '13 at 8:
Support Answers MathWorks Search MathWorks.com MathWorks Answers Support MATLAB Answers™ MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors https://www.mathworks.com/matlabcentral/answers/107106-error-lnk2019-unresolved-external-symbol-when-compiling-mex Recent Activity Flagged Content Flagged as Spam Help MATLAB Central Community Home MATLAB http://digital.ni.com/public.nsf/allkb/36F561F57095CADB86257CC4006C275B Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help Trial software Tim (view profile) 1 question 2 answers 1 accepted answer Reputation: 5 Vote1 error LNK2019: unresolved external symbol when compiling MEX Asked by Tim Tim (view profile) error lnk2019 1 question 2 answers 1 accepted answer Reputation: 5 on 21 Nov 2013 Latest activity Commented on by hassan mahmood hassan mahmood (view profile) 4 questions 3 answers 0 accepted answers Reputation: 3 on 20 May 2014 Accepted Answer by Tim Tim (view profile) 1 question 2 answers 1 accepted answer Reputation: 5 575 views (last 30 days) 575 views (last 30 days) I'm trying to compile 1 error lnk2019 some files into MEX and I get a linkage error.I have:helloworld.cpp which includes gateway functionftdi.h class declarationftdi.cpp a source fileFTD2XX.h and FTD2XX.lib a library and a headerAll files are in the same folder and this folder is my current working directory in MATLAB.I'm using MS VS2010 and MATLAB R2013a on a 64bit Windows 7. I set up the compiler using mex -setup and was able to create and run some test MEX files.As I understand, I need to compile both helloworld.cpp and fdti.cpp when I runmex helloworld.cpp fdti.cpp I get:ftdi.obj : error LNK2019: unresolved external symbol __imp_FT_ListDevices referenced in function "public: int __cdecl ftdi::GetDeviceCount(void)" (?GetDeviceCount@ftdi@@QEAAHXZ) ftdi.obj : error LNK2019: unresolved external symbol __imp_FT_Open referenced in function "public: int __cdecl ftdi::OpenDevice(int)" (?OpenDevice@ftdi@@QEAAHH@Z) and more of similar errors.ftdi::GetDeviceCount(void) andftdi::OpenDevice(int) are functions in ftdi.cppI also tried:mex helloworld.cpp and got similar errors. When I tried:mex -IC:\Users\tnosov\Documents\MATLAB\newtest20nov helloworld.cpp this is the path to where all my files are located and I got the same errors.I've been stuck with this problem for many days now, I tried many other things I found here and in other places on the internet, but nothing helps. I'll be thankful for any suggestions and comments.Thank you!Timhere's helloworld.cpp:#i
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 Secondary Software: N/A Problem: I am trying to use LabWindows/CVI functions 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 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 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. Configure the target settings by going to Build»Target Settings. Change the Run-time supportoption to Full run-time engine, as shown in the image below: Also change the type library settings by clicking Type Library and unchecking Add type library resource to DLL, as shown in the images below. If you do not uncheck this option, you may run into a type definition error when attempting to build, similar to the following:Definitions for these ty