multiple-definition-error Questions

7

Solved

I have 3 projects: Server, Client and Commons. Making header & source pairs in Commons doesn't cause any problems and I can access the functions freely from both Server and Client. However, fo...
Lamebrain asked 13/6, 2015 at 17:10

5

Solved

I am new to C++. I have some doubts regarding multiple definitions error in C++. Let's say I have 3 files in a program. One header file and 2 .cpp files. I have included the header file in b...
Jampan asked 20/9, 2013 at 10:7

9

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I'm trying to create a simple GUI application (so far) in Qt with C++ using the MinGW compiler. However, the compiler is informing me that I have a multiple definition of 'WiimoteScouter::WiimoteSc...
Gosse asked 11/2, 2011 at 1:50

2

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I have these files consumer.cpp consumer.hpp defines.hpp main.cpp makefile producer.cpp producer.hpp here's the file defines.hpp #ifndef DEFINES_HPP #define DEFINES_HPP #include <cassert&g...
Sweptwing asked 30/10, 2013 at 6:54

8

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I'm a C newbie and I was just trying to write a console application with Code::Blocks. Here's the (simplified) code: main.c: #include <stdio.h> #include <stdlib.h> #include "test.c" //...
Vania asked 23/3, 2009 at 9:46

1

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I just can't get my head around why this won't compile. I have three files: main.cpp #include "expression.h" int main(int argc, char** argv) { return 0; } expression.h #ifndef _EXPRE...
Colchester asked 23/5, 2018 at 7:37

4

this is my .pro file: QT += core gui widgets TARGET = link_mult_def TEMPLATE = app SOURCES += main.cpp \ path2/file.cpp \ path1/file.cpp HEADERS += For some reason, QtCreator does not resp...
Rudd asked 11/9, 2012 at 8:55

2

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My 'Headers.h' file includes basic c++ Headers #include <iostream> #include <cstring> // and many header files. wrote a function definition for file exist check and saved it in 'comm...
Buryat asked 5/1, 2016 at 14:50

2

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I have 2 libraries: test.1 and test.2. Both libraries contain a single global extern "C" void f(); function, with different implementations (just a cout for the test). I did the following test: T...

3

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I get the above message linker error for a global const char* HOST_NAME = "127.0.0.1"; I don't think that I have compiled some files twice but here's my definition of the files anyway. main.cpp...
Flophouse asked 3/7, 2014 at 15:58

5

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This function is global and is defined in the header file (temporarily I want to keep it there). The header file also constitutes a particular class which has inline functions and one of those fun...
Navigate asked 21/5, 2011 at 9:28

2

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I am trying to compile a code and it’s getting a linking error with multiple definitions. Unfortunately, I am not able to fix it and any help would be appreciated. I have following files: Header f...
Allard asked 12/9, 2013 at 11:40

1

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Recently I learned the beautiful language D, which is so more plastic and helps yourself writing stable fast programs. But its not popular... because few code written on D and so more on C and C++....
Sometimes asked 14/7, 2013 at 13:15

3

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I'm using multiple C++ files in one project for the first time. Both have need to include a protected (#ifndef) header file. However, when I do that, I get a multiple definition error. What I hav...
Giron asked 15/7, 2013 at 4:49

5

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The linker is reporting multiply defined errors for an inline function. I have the following code in a header file: struct Port_Pin { volatile uint32_t * port_addr_set_value; //!< Writing the...
Unanimity asked 1/7, 2010 at 18:10

2

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I'm writing some code where I need to have a class variable that's a static int array. I understand that I can do this with something like this in the header file, A.h: #ifndef A_H_ #define A_H_ ...
Ortensia asked 23/5, 2012 at 14:34

1

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I have a class called FindAndReplaceBar, whose implementation is this: #include "FindAndReplaceBar.h" #include <QLabel> #include <QPushButton> #include <QGridLayout> #include &lt...
Crowns asked 4/1, 2012 at 17:19

4

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I have a C program with several c and h files. I decided to make one part of the program 'header-only' so I moved the code from c to h. Now I'm getting multiples definition problems and I have no i...
Saunders asked 20/11, 2011 at 13:50

1

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I'm trying to test a library that I've done (Calculus), in QTCreator for Windows. I've created a main file, and a class in a separate file for the testing. If I compile the example found in http:/...
Melodist asked 4/10, 2011 at 21:22

4

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For example: code1.c / .cpp int a; // ... and so on code2.c / .cpp int a; int main(void) { return 0; } go to compile: $gcc code1.c code2.c # this is fine $ $g++ code1.cpp code2.cpp # th...

2

Beside moving the hello() function into another source (.cpp) file or renaming the function. Is there any other methods to avoid the linking error? staticLibA.h #ifndef _STATIC_LIBA_HEADER #defin...
Vicariate asked 11/1, 2011 at 5:3

9

So, no matter what I seem to do, I cannot seem to avoid having Dev C++ spew out numerous Multiple Definition errors as a result of me including the same header file in multiple source code files in...
Comparable asked 21/10, 2008 at 22:27

2

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I am facing below errors when trying to statically link libDuma, Can you tell me how to ask g++ to use malloc from libDuma? sunny@sunny-laptop:~/CodeTest$ g++ ./testDuma.cpp -g -o testDuma -static...
Scoliosis asked 21/5, 2011 at 9:46

4

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I want to write a library that to use, you only need to include one header file. However, if you have multiple source files and include the header in both, you'll get multiple definition errors, be...
Knowlton asked 19/10, 2010 at 22:14

1

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So my program is working fine. Compiling, linking, running, the works. Then, I decide to add a simple function to one of my files, like this: #ifndef UTILITY_HPP #define UTILITY_HPP /* #includes ...
Dethrone asked 28/6, 2010 at 22:29

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