dec.c:51:38: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
 void __cdecl incr_iv(unsigned __int8 *a1) {
                                      ^
dec.c: In function ‘cc_aes_ctr’:
dec.c:72:3: warning: implicit declaration of function ‘incr_iv’ [-Wimplicit-function-declaration]
   incr_iv((unsigned __int8 *)s);
   ^~~~~~~
dec.c:72:21: error: expected ‘)’ before ‘__int8’
   incr_iv((unsigned __int8 *)s);
                     ^~~~~~
dec.c:72:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   incr_iv((unsigned __int8 *)s);
           ^
<builtin>: recipe for target 'dec' failed
make: *** [dec] Error 1