https://stackoverflow.com › questions › 1517138

The trick here is to put the library AFTER the module you are compiling. The problem is a reference thing. The linker resolves references in order, so when the library is BEFORE the module being compiled, the linker gets confused and does not think that any of the functions in the library are needed. By putting the library AFTER the module, the ...

https://stackoverflow.com › questions › 7783345

It makes a difference where in the command you write this option; the linker searches and processes libraries and object files in the order they are specified. Thus, foo.o -lz bar.o searches library z after file foo.o but before bar.o. If bar.o refers to functions in z, those functions may not be loaded. The linker searches a standard list of ...

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

We encounter the ‘undefined reference’ error in C++ mostly due to issues with function or variable definitions, improper linking, or scope/naming problems. By careful checking the code and build process for these common issues, we can successfully resolve this error.

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

On la rencontre très souvent sur les fonctions, la fonction est bien déclarée, donc la compilation est effectuée, mais le problème se trouve au moment de l'édition des liens, le linker ne trouve pas la définition de la fonction !

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

Undefined reference errors might be perplexing, but with a clear understanding of their origins and systematic debugging, you can conquer them. By diligently providing function implementations, ensuring correct library linking, and meticulously verifying function and variable names, you’ll overcome the hurdles that these errors ...

https://discourse.cmake.org › t › getting-undefined-reference-error-despite-of-having-the...

If you get linker errors about undefined references to symbols that involve types in the std::__cxx11 namespace or the tag [abi:cxx11] then it probably indicates that you are trying to link together object

https://askubuntu.com › questions › 194193

The solution is as simple as adding the -l flags at the end: gcc test.c -o test -lssl -lcrypto.

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

Then the fix is to link both the object file from foo.c and undefined_reference.c, or to compile both the source files: $ gcc -c undefined_reference.c $ gcc -c foo.c $ gcc -o working_program undefined_reference.o foo.o $

https://thelinuxcode.com › undefined-reference-function-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://visualgdb.com › tutorials › linux › libraries › diagnosing

Fixing the ‘Undefined Reference’ Errors for C/C++ Projects. November 15, 2019 libraries, linux, symbols, troubleshooting, undefined reference. This tutorial shows how to various problems related to missing symbols in C/C++ projects.