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Undefined Reference To Error In C Linux

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Are you new to LinuxQuestions.org? So to me everything looks OK! 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make 1) that the executable depends on the object files, and 2) telling it how to create the executable when/if it's out of date For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. weblink

If you put the object files first, you don't run into this problem. Linked 14 What does the “undefined reference to varName” in C mean? 0 Building my own library with unitests complains about undefined reference 0 C error: undefined reference to Related 60Undefined Additionally, Vocab provides a mapping from * such string tokens (type VocabString) to integers (type VocabIndex). * VocabIndex is typically used to index words in language models to * conserve space You get is expanded with $(OBJS).

Undefined Reference To Function Error In C

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) { Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Development of retrosynthesis plan AWS EC2 SSH from my IP address which has changed What was that alien in Doctor Who that nobody saw?

  • My two make files are: Makefile.common TOP=$(shell readlink -f "$(dir $(lastword $(MAKEFILE_LIST)))") PROGRAM=main LIBDIR=$(TOP)/libs FREERTOSDIR=$(TOP)/src/FreeRTOS/Source #Adust the following line to the library in use STMLIB=$(LIBDIR)/STM32F10x_StdPeriph_Lib_V3.6.1/Libraries #Adjust TypeOfMCU in use, see CMSIS
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I've spent about a week trying to figure out why I could not get anything useful out of curses/ncurses. I am sure the libraries have been defined using some macros and you just need to move the variables around in the statement. –unxnut Jul 18 '15 at 0:03 Results 1 to 4 of 4 Thread: compiling with gcc and "undefined reference to xxx" Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Undefined Reference Error In C Compilation Sometimes I feel that I understand things, turn the corner and find that there is even more to understand.

acer_peri View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by acer_peri 05-27-2004, 11:46 PM #2 herbc Member Registered: May 2004 Location: United How To Solve Undefined Reference Error In C asked 5 years ago viewed 119787 times active 1 year ago Linked 0 How to use a header file in c 2 use a function before it's compiled 0 C error: c function reference undefined share|improve this question edited Jun 19 '15 at 7:54 moffeltje 2,48521229 asked Apr 5 '11 at 22:18 upswimsdn 120116 Do you get any other messages? If possible, how to include cut marks in PDF? (using watermark?) Why do we need blockchains?

I've been trying to compile the perl module but it refuses to play nice. C Undefined Reference To Pthread_create share|improve this answer answered Jul 17 '15 at 21:56 unxnut 2,7982617 I suspected that might be an issue, thanks for pointing that out. In the command I use the -L, -l and -rpath options which I thought was all that is needed for linking in linux. It implicitly looks for a file named Makefile, and runs whatever rules it contains.

How To Solve Undefined Reference Error In C

Not the answer you're looking for? http://www.linuxquestions.org/questions/programming-9/several-undefined-reference-to-error-when-compiling-a-c-programm-186781/ In order to become a pilot, should an individual have an above average mathematical ability? Undefined Reference To Function Error In C Thanks 06-21-2011 #2 tabstop View Profile View Forum Posts and the Hat of Guessing Join Date Nov 2007 Posts 14,185 You need to make sure you are compiling all the source Undefined Reference To A Function C++ I believe you need OBJS+= lines for these. –caveman Jan 11 '15 at 11:17 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote As well as

That error means it saw the function was defined (in the header), but couldn't locate the actual code to execute it. have a peek at these guys C is case-sensitive. 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 Unix & Linux Stack Exchange works best with JavaScript enabled Register Remember Me? C Undefined Reference To Function In Header File

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 The time now is 08:34 PM. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. http://centralpedia.com/undefined-reference/undefined-reference-error-in-linux.html i.e.

As I wrote, I really would appreciate any help. C Undefined Reference To Variable In the end I just entered that gcc command manually and used make again to finish it off. –relo Jul 20 '15 at 17:47 add a comment| Your Answer draft In this case you'd have something like this: OBJS=testpoint.o point.o testpoint.exe: $(OBJS) gcc $(OJBS) The first is just a macro for the names of the object files.

It's never to late to learn GNU `make' Hopefully you know something about programming and compiling...

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Integer function which takes every value infinitely often Does the reciprocal of a probability represent anything? I keep getting: testpoint.c: undefined reference to 'create(double x, double y)' While it is defined in point.c. Contact Us - Advertising Info - Rules - LQ Merchandise - Donations - Contributing Member - LQ Sitemap - Main Menu Linux Forum Android Forum Chrome OS Forum Search LQ http://centralpedia.com/undefined-reference/undefined-reference-to-ns2-error.html The time now is 02:34 AM.

Lengthwise or widthwise. here is my Vocab.h: Code: /* * Vocab.h -- * Interface to the Vocab class. * * * SYNOPSIS * * Vocab represents sets of string tokens as typically used for Every polynomial with real coefficients is the sum of cubes of three polynomials Split python tuple in subtuples with capacity limit in functional programming style In order to become a pilot, So to me everything looks OK!

The question does not have to be directly related to Linux and any language is fair game. quaere et invenies. "Simplicity does not precede complexity, but follows it." -- Alan Perlis "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra "The only real The full step that it fails on with error looks like this: gcc -g -O2 -fopenmp -L/usr/lib -lcfitsio -lm -o lenstool_tab e_nfwg.o lenstool_tab.o midpnt.o nrutil.o polint.o qromo.o read_bin.o lenstool_tab.o: In function Actually I dug a little deeper and found another makefile in the directory with those c programs, and found a similar line to put -lm on, but it's still not showing

But when I try to compile the file that I really want to use "vclient.c" I get an error message /tmp/ccuuPxtN.o(.text+0x3bc): In function `main': vclient.c: undefined reference to `initLog' Now as Check out this tutorial on makefiles: Make File Tutorial It helps to automate this process. How to select citizen justices? You typically store this in a file named Makefile, and to build your program, you just type make at the command line.