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https://stackoverflow.com › questions › 5559250

C error: undefined reference to function, but it IS defined

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. With the code as it's written right now, however, you'll then run into the opposite problem: multiple definitions of main.

https://stackoverflow.com › questions › 8024440

c - What causes the error "undefined reference to (some function ...

I get the error: main.o(.text+0x1ed): In function `main': : undefined reference to `avergecolumns'. collect2: ld returned 1 exit status. when I gcc *.o. I'm not quite sure what causes this error. Other posters have explained it as the function is not found or the function is empty.

https://openclassrooms.com › forum › sujet › les-sources-de-l-erreur-undefined-reference-to

Les sources de l'erreur "undefined reference to" - OpenClassrooms

L'erreur, c'est que l'éditeur de liens n'arrive pas à trouver le symbole référencé dans les fichiers objets qui lui sont passés. Deux cause principales: 1. Projet mal configuré, des fichiers nécessaires ne sont pas compilés. 2. Mélange de C et C++ sans utiliser les conventions nécessaires (extern "C").

https://openclassrooms.com › forum › sujet › undefined-reference-to-ma-fonction-en-c-36182

undefined reference to (ma fonction) en C. - OpenClassrooms

Si tu coche uniquement la cible release, et que tu compile en mode debug, par exemple, ben ton fichier ne sera pas compilé. Après, c'est à toi de voir, si tu as besoin d'utiliser le débugger, tu n'as pas le choix, tu dois compiler en debug.

https://thelinuxcode.com › undefined-reference-function-c

Resolving the Frustrating "Undefined Reference" Error in C

Undefined reference errors in C occur when a function declaration doesn‘t match its corresponding definition. This happens due to: Typos in function names ; Forgetting to define declared functions; Definitions residing in separate unsourced files; Missing libraries during linking

https://www.developpez.net › forums › d1590939 › c-cpp › c › debuter › undefined-reference-to-fonction

"Undefined reference to [ma fonction]" - C - Developpez.com

Les "Undefined reference to [ma fonction]" sont normalement dus à l'absence de la fonction lors de l'édition de lien (après la compilation), soit en raison de l'absence d'une bibliothèque (ou library en anglais), soit du fait de l'absence du code compilé de la fonction si c'est toi qui l'a codée.

https://riptutorial.com › c › example › 12342 › undefined-reference-errors-when-linking

C Language Tutorial => Undefined reference errors when linking

One of the most common errors in compilation happens during the linking stage. The error looks similar to this: $ gcc undefined_reference.c. /tmp/ccoXhwF0.o: In function `main': undefined_reference.c:(.text+0x15): undefined reference to `foo'. collect2: error: ld returned 1 exit status.

https://www.developpez.net › forums › d2057214 › c-cpp › c › probleme-erreur-undefined-reference...

Probleme erreur : undefined reference to 'fonction' - C - Developpez.com

J'ai un problème d'erreur sur mon programme sur Codeblocks. J'ai essayé de réinstaller Codeblocks mais ça ne marche pas. À la ligne 9, ça me met « undefined reference to 'intervalle' » et ça à chaque fonction. Merci d'avance.

https://towardsdev.com › navigating-undefined-reference-errors-in-programming-causes-and...

Navigating Undefined Reference Errors in Programming: Causes and ...

An undefined reference error occurs during the linking phase of compilation when the compiler can’t locate the definition of a function or variable declared elsewhere. Potential Causes: Missing Function Definitions: If a function is declared but not defined, the linker can’t find its implementation.

https://www.geeksforgeeks.org › fix-undefined-reference-error-in-cpp

How to Fix Undefined Reference Error in C++? - GeeksforGeeks

In C++, the undefined reference error typically occurs during the linking phase of compilation. This error indicates that the compiler knows about a function or variable (it has been declared), but it cannot find the actual implementation (definition) during the linking process.