Build .so file from .c file using gcc command line
source file (so_test.c)
#include <stdio.h> void hello_so() { printf("Hello .so\n"); } |
command (01)
#gcc -c -fPIC so_test.c -o test.o |
command (02)
#gcc test.o -shared -o libtest.so |
source file (main.c)
#include <stdio.h> #include <dlfcn.h> void main(void) { void *handle; void (*hello_so1)(void); char *error; handle = dlopen("./libtest.so", RTLD_LAZY); if(!handle) { printf("[ERROR] : %s\n", dlerror()); exit(1); } hello_so1 = dlsym(handle, "hello_so"); if( (error = dlerror()) != NULL) { printf("[ERROR] : %s\n", dlerror()); exit(1); } hello_so1(); dlclose(handle); return; } |
command (01)
#gcc main.c -o main -ldl |
command (02)
#./main Hello! # |
