# static library and dynamic linked library

## This example demonstrate the usage of static libraries:

run with:

```sh
gcc -c add_vec.c mul_vec.c
ar rcs libvec.a add_vec.o mul_vec.o
gcc -c main.c
gcc -static -o prog2c.bin main.o ./libvec.a
./prog2c.bin
```

## Run with dynamic linked library:

```sh
gcc -shared -fpic -o libvec.so add_vec.c mul_vec.c
gcc -o prog21.bin main.c ./libvec.so
```

We see `prog2c` is 764 KB while `prog21` is 20 KB.

```sh
✔≻ lsd -l prog21.bin
.rwxr-xr-x vitalyr eva 20 KB Wed Nov  2 14:05:44 2022  prog21
✔≻ lsd -l prog2c.bin
.rwxr-xr-x vitalyr eva 764 KB Mon Oct 31 01:38:55 2022  prog2c
```