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Linker Error Undefined Reference To Static Variable

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When is it okay to exceed the absolute maximum rating on a part? How do you get a dragon head in Minecraft? Were students "forced to recite 'Allah is the only God'" in Tennessee public schools? For example, the following code compiles just fine: #include class Foo { public: static const int MEMBER; }; const int Foo::MEMBER = 1; int main(){ std::vector v; v.push_back( Foo::MEMBER ); http://softacoustik.com/undefined-reference/linker-error-undefined-reference-to-static-member.php

Different precision for masses of moon and earth online Why is JK Rowling considered 'bad at math'? I want to have the main file to deal with two headers. more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation I love your observation about "unary +"! his explanation

Undefined Reference To Static Member Variable C++

Join them; it only takes a minute: Sign up Linker error when using static members up vote 3 down vote favorite I'm using Qt 4.7 and Cmake 2.8.3 with g++ 4.2.1 line to SerialServoControl::_serial = NewSoftSerial(tx, rx). Not the answer you're looking for? Red balls and Rings What is a Waterfall Word™?

Sieve of Eratosthenes, Step by Step Is it correct to write "teoremo X statas, ke" in the sense of "theorem X states that"? Why does Luke ignore Yoda's advice? I really doubt if these two initialization should appear in class bar (or appear somewhere outside the class but in bar.cpp). C++ Undefined Reference To Extern Variable If those answers do not fully address your question, please ask a new question. 3 Please give the exact error message. –Chip Aug 24 '12 at 23:31 add a comment|

This leads me to believe that it is some sort of syntax error. Undefined Reference To Static Member Function C++ You are helped me a lot! –JavaRunner Mar 29 '14 at 9:10 1 Just put using namespace std; inside your own namespace declaration :P namespace your_custom_namespace { using namespace std; asked 4 years ago viewed 11716 times active 4 years ago Visit Chat Linked 31 static variable link error 8 Undefined reference to static variable Related 1875Detecting an undefined object property1798What Here's the error: ld: duplicate symbol ColorTrail::calculateColorUniformLocation in CMakeFiles/GLBall.dir/src/DesktopMain.cpp.o and CMakeFiles/GLBall.dir/src/ColorTrail.cpp.o collect2: ld returned 1 exit status calculateColorUniformLocation is a static member of class ColorTrail...

Once again thanks. –Nevermore Apr 29 '13 at 17:35 @Nevermore: You're welcome, glad it helped ;) –Andy Prowl Apr 29 '13 at 17:40 @AndyProwl I tried this Multiple Definition Of Static Variable C++ What does the pill-shaped 'X' mean in electrical schematics? In this case your lvalue-to-rvalue conversion (thanks to the (int) cast) occurs in the translation unit with perfect visibility of the constant, and the Foo::MEMBER is no longer odr-used. And more interesting, why it will compile when I cast MEMBER to int? #include class Foo { public: static const int MEMBER = 1; }; int main(){ vector v; v.push_back(

Undefined Reference To Static Member Function C++

that could qualify for stackoverflow.com/questions/1995113/strangest-language-featu‌re if it isn't there already... –Andre Holzner Dec 3 '10 at 13:45 1 Also worth noting that MSVC accepts the non-cast version without complaints. –porges Thank you again for your prompt help. Undefined Reference To Static Member Variable C++ But it even made the thing worse. Undefined Reference To Static Function Browse other questions tagged c++ or ask your own question.

You can achieve this by simple adding this line: LARGE_INTEGER WindowsTimer::_frequency = 0; into one of your C++ sources. http://softacoustik.com/undefined-reference/linker-error-undefined-reference-to-c.php inside your class is only a declaration, and not a definition. What am I doing wrong? What you need to do is simply to provide a definition for your static member variable: class Helloworld { public: static int x; void foo(); }; int Helloworld::x = 0; // Undefined Reference To Private Static Variable

If those answers do not fully address your question, please ask a new question. 1 I disagree that this is a duplicate question. Red balls and Rings How is the ATC language structured? Were students "forced to recite 'Allah is the only God'" in Tennessee public schools? my review here I'm still a bit green on the C++ front, but I'm learning quickly.

Is there a word for spear-like? C++ Undefined Reference To Static Vector more hot questions lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Of course, this means you'll have to define a relevant constructor for the NewSoftSerial class.

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C++ Information Tutorials Reference Articles Forum Forum BeginnersWindows ProgrammingUNIX/Linux ProgrammingGeneral C++ ProgrammingLoungeJobs Home page | Privacy policy© cplusplus.com, 2000-2016 - All rights reserved - v3.1Spotted an error? In your CPP file add the following: NewSoftSerial SerialServoControl::_serial(9, 8); char SerialServoControl::_tx = 0; char SerialServoControl::_rx = 0; share|improve this answer answered Apr 9 '11 at 5:35 Victor Parmar 3,42642029 add What is the meaning of the so-called "pregnant chad"? Invalid Use Of Qualified-name Why doesn't compiler report missing semicolon?

The other question referenced is very general in nature and would not have helped me to resolve my mac specific issue. –Adam Aug 29 at 16:09 add a comment| 2 Answers Here's the code: main.cpp: #include "SDL/SDL.h" #include "Initilize.cpp" int main(int argc, char* args[]) { //Keeps the program looping bool quit = false; SDL_Event exit; //Initilizes, checks for errors if(Initilize::Start() == -1) Is there a word for spear-like? get redirected here Join them; it only takes a minute: Sign up c++ undefined reference to static variable [duplicate] up vote 4 down vote favorite 1 This question already has an answer here: static

This means the angle brackets aren't interpreted as HTML. –Steve Jessop Nov 7 '08 at 19:03 cheers :) 10 character min rule is sometimes annoying ;) –Pawel Piatkowski Nov more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Don't know why0Undefined Reference to class static member in static member1static variable - undefined reference-2Undefined refernce static member C++0Undefined reference with -static?2Undefined reference to static const member Hot Network Questions How asked 7 years ago viewed 94339 times active 4 months ago Visit Chat Linked 8 Undefined reference to static variable 0 Why pthread_mutex_t can't be static field of class ? 0

How should I revise my codes? Putting them in the class just declares that they are there, but something still needs to define them. How to find positive things in a code review? Can an umlaut be written as a line in handwriting?

but its not even used in DesktopMain.cpp at all! Once you call static_cast, a temporary variable is created. That compiler optimisations may get rid of your linker error doesn't change that. How do you get a dragon head in Minecraft?

Who would have thought that poor little "unary +" actually had a use... :) –j_random_hacker May 29 '09 at 10:38 3 Thinking about the general case... push_back takes its parameter by const reference, and so strictly the compiler needs the address of your member and you need to define it in the namespace. The actual command is explicit as to the location of all these files): avr-gcc -Os -Wl,--gc-sections -mmcu=atmega328p \ -o Wheel_Chair_Joystick_Control.cpp.elf \ SerialServoControl.cpp.o \ Wheel_Chair_Joystick_Control.cpp.o \ WheelChairMotor.cpp.o \ NewSoftSerial.cpp.o \ core.a \