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Update: This error has been fixed and the files have been revised to show this: lines.h lines.cpp ThreeD.cpp ThreeD.h I messed around with labeling some the global variables extern, but it Uh... it'd defeat their purpose). Link the code once, and once only, and there is only one copy of the data, howver you can include headers all day long, this tells the other code that there

Adv Reply April 26th, 2011 #4 nvteighen View Profile View Forum Posts Private Message Ubuntu addict and loving it Join Date Apr 2007 Location (X,Y,Z) = (0,0,0) Beans 3,715 Re: The header is only there to allow multiple file projects to have a common interface before linking. 1.List item You should give info about the global variable in header: extern int In “GlobalVariable.h” # ifndef GLOBALVARIABLE_H #define GLOBALVARIABLE_H #include //////////////////////////////////////// extern long lFA_MTPulse; extern long lNoOfMTPulses; extern long ltDK_MTPulse_Duration_us; //extern long ltDK_MTPulse_Delay_us; extern long ltDK_Wait_After_MT_us; extern long ltDK_Wait_After_MTSpoil_us; extern long lNoOfMTPulses_PerRTEB; Why doesn't ${@:-1} return the last element of [email protected]?

E.g.: //Lines.h #define GCCC //Note the typo #if defined(GCC) #define INLINE inline #elif defined (MSVC) #define INLINE __inline #else #define INLINE //Due to the typo, INLINE will be turned into nothing In any case, if the length of the compilation and linking commands feel prohibitive, it's time to write a Makefile. Is it certain that 'inline' must be obeyed by the compiler? Paciotti 2015-04-19 16:40:49 UTC #3 Sorry, this is the error: In file included from ../inc/spark_wiring.h:29:0, from ../inc/application.h:29, from lmt871.cpp:1: ../../core-common-lib/SPARK_Firmware_Driver/inc/config.h:12:2: warning: #warning "Defaulting to Release Build" [-Wcpp] #warning "Defaulting to Release

Quick Navigation C++ Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication asked 3 years ago viewed 39629 times active 1 year ago Linked 0 Ttrying to understand Classes and headers -1 Compiling code directly from .cpp files works. It cause linker error. –bayda Mar 26 '09 at 13:28 create lines.h, insert declaration of those functions in lines, and include this lines.h –bayda Mar 26 '09 at 13:29 variable and function declarations ... #endif Anyone can help me?Thanks P.S.

vBulletin 2000 - 2016, Jelsoft Enterprises Ltd. My sources are as follows (a simple example to illustrate the code): /**********************************************************************/ /*memory.h*/ #ifndef MEMORY #define MEMORY int var; #endif /*MEMORY*/ /**********************************************************************/ /**********************************************************************/ /* a.h */ #ifndef A #define A For details and our forum data attribution, retention and privacy policy, see here Search: Forum UNIX/Linux Programming Solving multiple definition Solving multiple definition Nov 21, 2008 at 3:46pm UTC Ruben Yeah, because in this case you're declaring something, not creating an object/variable...

Remove advertisements Sponsored Links Corona688 View Public Profile Visit Corona688's homepage! share|improve this answer edited Sep 12 '13 at 11:53 answered Sep 12 '13 at 11:44 Benoit Blanchon 3,97912124 Thanks, it worked. –Dushyant Kumar Sep 12 '13 at 12:21 add You have to remember that "include" means it is including all the *.h information in that file, so you would be copying that information (not just the reference) into every file Is the NHS wrong about passwords?

How can that be? Declaring and defining in the header makes less typing in the command line. Convert mp4 to mp3 Using Shell Script Karger's Algorithm question Why microcontroller takes many clock cycles to start up with PLL clock source? They are should be linked.

It's a linker error because the same symbols are being defined in the cpp modules. Nudge, nudge, wink, wink. –paxdiablo Mar 26 '09 at 12:00 could you show your finaly g++ command? –bayda Mar 26 '09 at 12:06 What other code would I received exactly the same errors, so I returned it to its original state. Word with the largest number of different phonetic vowel sounds How to show hidden files in Nautilus 3.20.3 Ubuntu 16.10? 5008 out of the box How do I say "best practice"

Include the inline keyword so they are not exported by each object file, or put them in their own .cpp file. my code ... #lmt871.cpp: #include "lmt871.h" ... I was under the impression that the purpose of header guards was precisely to prevent such an error. 03-26-2009 #2 bithub View Profile View Forum Posts Registered User Join Date Sep You shouldn't need the 'i=20' in main anymore, since it will start at that value when the program's run anyway, but neither will it hurt anything.

more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Unfortunately, I am not able to fix it and any help would be appreciated. The transformation T on the set of all continuous functions that is defined by T(f) = f (1) is a linear transformation. Is there any changes I should make to the makefile (regarding your comment on lines.cpp being defined in lines.o and ThreeD.o?) –Chad Mar 26 '09 at 13:32 You can

De kio “saluton” estas la rekta objekto? I don't see what is special about a function compared to a class definition that requires it to be placed in a cpp file. –ElefEnt Apr 17 '15 at 17:00 | At least that seems to be a good reason why it doesn't result in multiple definition clashes during linking. Results 1 to 7 of 7 Thread: [C++] Avoiding Linker Error: Multiple Definition Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to

Good to know. You may declare the definition as static (only 1 copy allowed for the entire program) if you are defining things in a header for utility functions that you don't want to mdma 2015-04-19 18:25:43 UTC #6 mdma: You can fix this by moving the declaration to your lmt871.cpp file I'm guessing you didn't do this. The time now is 03:30 AM.

I'm more inclined to think there is a problem with the dual inclusion of lmt871.h... share|improve this answer edited Jul 20 '13 at 17:35 answered Jul 20 '13 at 17:23 Yu Hao 84.3k18116177 solved! :) Could you please tell me why I shouldnt put Or does "different modules" mean something else? This is very unusual.

What happens if one brings more than 10,000 USD with them in the US? Why would a password requirement prohibit a number in the last character? Generate a 6 character string from a 15 character alphabet Does chilli get milder with cooking? Why microcontroller takes many clock cycles to start up with PLL clock source?

Ubuntu Logo, Ubuntu and Canonical Canonical Ltd. The corresponding cpp file, which you will compile separately, will have the function definition. Adv Reply April 26th, 2011 #3 Arndt View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date May 2006 Beans 1,787 Re: [C++] Avoiding Linker Error: Multiple Definition The global i defined in file2.c lies in the data segment and is unrelated to the local i inside main within the file2.c which lies on the stack frame created for

So, what you want is to get rid of any multiple definition before the linker does it job. Define in one source file, declare extern in a header. share|improve this answer edited Jul 16 '15 at 17:53 AbcAeffchen 4,603112245 answered Jul 28 '13 at 6:26 Mohit Chugh 1514 add a comment| up vote 10 down vote The problem is My current problem occurs when trying to use a friend function.

share|improve this answer answered Mar 26 '09 at 12:02 strager 59k1499150 add a comment| up vote 3 down vote Please post some code snippets.