Getting 'undefined reference to' scenarios with static library in C
I'm updating my dependencies and I've been struggling with this for a few days now and could really use some help. I'm working with an 'undefined reference to' behavior when trying to use a static library in my C project, even though I've ensured that the library is correctly linked during compilation. I created a static library `libmylib.a` from a source file `mylib.c` that contains a function: ```c // mylib.c #include <stdio.h> void my_function() { printf("Hello from my_function!\n"); } ``` After compiling it with the command: ```bash gcc -c mylib.c -o mylib.o ar rcs libmylib.a mylib.o ``` I then attempted to use this library in my main program `main.c` as follows: ```c // main.c #include <stdio.h> void my_function(); int main() { my_function(); return 0; } ``` When I compile my main file with the command: ```bash gcc main.c -o main -L. -lmylib ``` I receive the following behavior: ``` undefined reference to `my_function`' ``` I've double-checked that `libmylib.a` is in the correct directory and that I am using the `-L` and `-l` flags properly. Additionally, I've confirmed that I have the necessary permissions to access the library file. I've tried cleaning the build by removing all `.o` and `.a` files and recompiling them, but the scenario continues. Is there something I might be missing that could cause this behavior during the linking stage? I'd really appreciate any guidance on this. For context: I'm using C on Linux. Am I missing something obvious? This is for a web app running on Linux.