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#include <stdio.h>
#include <stdlib.h>
 
void hello(void)
{
        puts("Hello!");
}
 
void goodbye(void)
{
        puts("Goodbye!");
}
 
void set_sp_(void *p)
{
        void *s[0];
        s[0] = p;
}
 
void set_sp(void *p)
{
        set_sp_((void*)p);
}
 
int main(void)
{
        void *new_stack[1024] = {
                [1019] = (void*)0,
                [1020] = (void*)&hello,
                [1021] = (void*)&goodbye,
                [1022] = (void*)&exit
        };
        set_sp((void*)&new_stack[1019]);
        return 0;
}
 

prog.c: In function ‘set_sp_’:
prog.c:16:15: error: ISO C forbids zero-size array ‘s’ [-Werror=pedantic]
         void *s[0];
               ^
prog.c:16:15: error: variable ‘s’ set but not used [-Werror=unused-but-set-variable]
prog.c: In function ‘main’:
prog.c:29:26: error: ISO C forbids conversion of function pointer to object pointer type [-Werror=pedantic]
                 [1020] = (void*)&hello,
                          ^
prog.c:30:26: error: ISO C forbids conversion of function pointer to object pointer type [-Werror=pedantic]
                 [1021] = (void*)&goodbye,
                          ^
prog.c:31:26: error: ISO C forbids conversion of function pointer to object pointer type [-Werror=pedantic]
                 [1022] = (void*)&exit
                          ^
cc1: all warnings being treated as errors

Standard output is empty