prepare (1/2): 
finished

make (2/2): 
gcc -O3 -Wall -o c2 main.c  aes.c
main.c: In function 'main':
main.c:97:45: warning: implicit declaration of function 'getpid'; did you mean 'getopt'? [-Wimplicit-function-declaration]
              srand((unsigned int) time(0) + getpid());
                                             ^~~~~~
                                             getopt
In file included from main.c:6:0:
At top level:
aes.h:59:22: warning: 'r' defined but not used [-Wunused-variable]
 static unsigned char r[10] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
                      ^
finished

all tasks finished, build successfully