Linker Error In C Undefined Symbol
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How To Solve Linker Error In C
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Linker Error Undefined Symbol _printf In Module
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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 undefined symbol in module c++ this site About Us Learn more about Stack Overflow the company Business Learn undefined symbol error in turbo c more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question bgi error graphics not initialized x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up http://www.codeproject.com/Questions/264025/Linker-error-in-c-program Linker Error C++ “undefined reference ” [duplicate] up vote 9 down vote favorite 2 Possible Duplicate: What is an undefined reference/unresolved external symbol error and how do I fix it? Trying to compile my program via g++ -o prog1 main.cpp -std=c++0x I get the error: /tmp/cc1pZ8OM.o: In function `main': main.cpp:(.text+0x148): undefined reference to `Hash::insert(int, char)' collect2: error: ld returned 1 exit status main.cpp #include http://stackoverflow.com/questions/14557657/linker-error-c-undefined-reference
View All Answers My Questions Articles Tutorial Tips, Tricks & Techniques News Database Support Community Forums Search Recent DiscussionsResourcesQuality PortalEvents CalendarEmbarcadero on YouTube Job BoardRegistered User DownloadsTrial Downloads Books Login Register HomeArticlesTips, Tricks & http://community.embarcadero.com/article/technical-articles/162-programming/14926-understanding-undefined-symbol-error-messages TechniquesPROGRAMMINGUnderstanding "Undefined Symbol" Error Messages. Understanding "Undefined Symbol" Error Messages. Written by Embarcadero USA. https://in.answers.yahoo.com/question/index?qid=20100906201233AAHxL1s Posted in PROGRAMMING Technical Information Database TI688C.txt Understanding "Undefined Symbol" Error Messages. Category :General Platform :All Product :Borland C++ ALL Description: One of the most common error messages seen by developers using a C or C++ compiler is "undefined symbol." This document provides a general description of what causes undefined symbol error messages, as well as instructions linker error on solving specific undefined symbol errors. UNDEFINED SYMBOL AT COMPILE TIME An undefined symbol at compile time indicates that the named identifier was used in the named source file, but had no definition in the source file. This is usually caused by a misspelled identifier name, or missing declaration of the identifier used. EXAMPLE 1: int main(void) { test = 1; return 0; } The code shown for example one will linker error in cause an undefined symbol error message to be displayed because the variable "test" has not been declared in either a header file which has been included or in the actual code itself. EXAMPLE 2: int main(void) { int test; Test = 1; return 0; } The code shown for example one will cause an undefined symbol error message to be displayed because when the variable "test" was used it was misspelled. The misspelling was a capital 't' instead of a lower case 't'. EXAMPLE 3: int main(void) { int test; test = 1; return 0; } The code shown in example three has no errors and is an example of what must be done to resolve an undefined symbol error message. In the example here we simply made sure we have a definition for the integer test and that we spelled it the same at the time we used it. It's that simple! UNDEFINED SYMBOL AT LINK TIME When linking multi-file projects, the linker must resolve all references to functions and global variables shared between modules. When these references cannot be resolved, the linker generates an "undefined symbol" error message. This means that after searching all of the object files and libraries which are included in the link, the linker was unable
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