/in/foo.c: In function 'main':
/in/foo.c:14:14: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
     int *a = malloc(1024 * 1024 * 10);
              ^~~~~~
/in/foo.c:14:14: warning: incompatible implicit declaration of built-in function 'malloc'
/in/foo.c:14:14: note: include '<stdlib.h>' or provide a declaration of 'malloc'