Loads a shared object and executes code inside it

dynload.c

#include <assert.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <stdio.h>

const char *const module = "./module.so";

typedef void (*run_func)(void);

int main(void) {
    printf("Loading %s\n", module);

    char *error;

    void *handle = dlopen(module, RTLD_LOCAL | RTLD_NOW);
    if ((error = dlerror()) != nullptr) {
        perror(error);
        return EXIT_FAILURE;
    }

    run_func run = dlsym(handle, "run");
    if ((error = dlerror()) != nullptr) {
        perror(error);
        return EXIT_FAILURE;
    }

    run();

    dlclose(handle);
}

dynload.mk

CC := clang
CFLAGS := -Wall -Wextra -Werror -std=c23 -g

.PHONY: build clean
build: dynload.exe module.so

clean:
	$(RM) *.o *.so *.exe

dynload.exe: dynload.o
	$(CC) -o $@ $^ $(LDFLAGS)

module.so: module.o
	$(CC) -shared -o $@ $^ $(LDFLAGS)

%.o: %.c
	$(CC) $(CFLAGS) -o $@ -c $<

module.c

#include <stdio.h>

void run(void) {
    printf("Hello, from inside module.so\n");
}