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Undefined Reference To Function Error In C


I have a lib folder inside my main folder where I have the two XPM_lib.h and XPM_lib.c files. Adv Reply February 14th, 2011 #2 Arndt View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date May 2006 Beans 1,787 Re: compiling with gcc and "undefined reference To compile your sources do: $ gcc -c -o Main.o Main.c $ gcc -c -o Person.o Person.o Then the resulting object files must be linked into a single executable: $ gcc But obviously I am missing something fundamental. http://xhpcreations.com/undefined-reference/gcc-undefined-reference-to-function.html

share|improve this answer edited Feb 28 '13 at 17:20 answered Feb 28 '13 at 16:58 Mike 22.2k1262126 It's my fault, I've edited the post so it's now accurate. Can I release a pattern without releasing the whole held expression? For bigger projects, the two step process allows to compile only what changed during the generation of the executable. For all but the very simplest programs, the program is composed of multiple C++ source files (also known as “translation units”). http://stackoverflow.com/questions/11277344/undefined-reference-to-function-error

Undefined Reference To Function Error In C

Page generated in 0.03111 seconds .:: Contact :: Home ::. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. Please visit this page to clear all LQ-related cookies.

The second is a rule to tell make 1) that the executable depends on the object files, and 2) telling it how to create the executable when/if it's out of date I'm including the makefile here in case it helps. Why must the speed of light be the universal speed limit for all the fundamental forces of nature? C Undefined Reference To Function In Header File If you need to reset your password, click here.

The time now is 03:08 AM. How To Solve Undefined Reference Error In C Where are sudo's insults stored? Try compiling it as gcc Main.c Person.c -o MyProgram. Why can't we use the toilet when the train isn't moving?

This code illustrates the problem: int foo(); int main() { foo(); } Here, we have a declaration of the function foo(), which we call in main(), but no definition. Undefined Reference To Function In C Linux So my question is how can I told Eclipse to include the C-Files from the 3rd party Folders. How can I make LaTeX break the word at the end of line more beautiful? Browse other questions tagged c function reference undefined or ask your own question.

How To Solve Undefined Reference Error In C

I keep getting: testpoint.c: undefined reference to 'create(double x, double y)' While it is defined in point.c. https://ubuntuforums.org/showthread.php?t=1687827 Get rid of the one in point.c –RageD Apr 5 '11 at 22:25 It is working now. Undefined Reference To Function Error In C But it’s not magic – like all errors it means that you have done something wrong, in you code and/or your project’s configuration, and you need to take some time to Undefined Reference To A Function C++ more hot questions 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 Science Other

How much interest should I pay on a loan from a friend? http://xhpcreations.com/undefined-reference/undefined-reference-to-main-in-function-start.html For details and our forum data attribution, retention and privacy policy, see here current community chat Unix & Linux Unix & Linux Meta your communities Sign up or log in to I have a Person.c and a Person.h whats wrong with that ? –dimitris93 May 2 '15 at 4:46 gcc two .c files together –user3528438 May 2 '15 at 4:48 What sense of "hack" is involved in "five hacks for using coffee filters"? Undefined Reference To Function Error In C++

Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. (LogOut/Change) You are Join them; it only takes a minute: Sign up “Undefined reference to function” error up vote 7 down vote favorite I am having some trouble compiling a few files using headers. UNIX is a registered trademark of The Open Group. navigate here That is almost always because a library wasn't linked in (or you haven't written the function yet ) Dark_Helmet View Public Profile View LQ Blog View Review Entries View HCL

Your compilation command should be something like: $ gcc -o testncurses.o -lncurses testncurses.c Dark_Helmet View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by Undefined Reference To Function Makefile I would check the include paths for your project and make sure that the header.h with your declaration of func1() is being included first. Generate a 6 character string from a 15 character alphabet How should I interpret "English is poor" review when I used a language check service before submission?

Right now i am using gcc Main.c -o Main –dimitris93 May 2 '15 at 4:49 2 @Shiro gcc Main.c Person.c -o Main –user3528438 May 2 '15 at 4:52

You'll need to specify both files, something like: gcc testpoint.c point.c ...so that it knows to link the functions from both together. Once all the object files have been produced, the linker looks at them and works out what the final addresses of functions in the executable will be. Create a wire coil What sense of "hack" is involved in "five hacks for using coffee filters"? C Undefined Reference To Pthread_create How exactly does the typical shell "fork bomb" calls itself twice?

You get is expanded with $(OBJS). I need to get this to work with the 3 files. Compute the kangaroo sequence In Harry Potter book 7, why didn't the Order flee Britain after Harry turned seventeen? http://xhpcreations.com/undefined-reference/undefined-reference-to-function-c-programming.html When casting a cube spell on a hex grid do you pick a honeycomb for origin or an intersection for origin?

It then patches up the addresses the compiler could not provide. Something else is afoot, I think. Word with the largest number of different phonetic vowel sounds Does chilli get milder with cooking? Why doesn't ${@:-1} return the last element of [email protected]?

function implementation ... } header.h void func1(); The error I am getting is: In function 'main': undefined reference to 'func1' Note: I am just using a simple breakdown of how my Meaning of "oh freak" Relation between representations of p-adic groups and affine Hecke algebras date: invalid date '2016-10-16' Is there a Korean word for 'Syllable Block'? When I look in common.h I find int initLog(int useSyslog, char *logfile,int debugSwitch); and looking in common.c (also in the same directory) I find int initLog(int useSyslog, char *logfile,int debugSwitch) { Appease Your Google Overlords: Draw the "G" Logo True or False?

I added the -lm to various parts of the makefile that seemed appropriate, but it didn't help. class clf { public: clf(); // Constructor (ctor) ~clf(); // Destructor (dtor) int n1, n2, n3; }; clf clf1; // class object int main (void) { return (0); } The linker But when I try to compile my test.c file I get an "undefined reference to initXPM_image" error. Build usually is done in two steps (1) compilation and (2) linking.

Sometimes I feel that I understand things, turn the corner and find that there is even more to understand. Conclusion The unresolved reference error can have many causes, far from all of which have been described here. Why (in universe) are blade runners called blade runners?