ref: cd1c02a7e638b91a3506d71a79480e9020e83ffb
dir: /tests/execute/0153-cpp-string.c/
#define M1(x) "This is a string $ or # or ## " ## #x
#define STR "This is a string $ or # or ## and it is ok!"
int
main(void)
{
char *s, *t = M1(and it is ok!);
for (s = STR; *s && *s == *t; ++s)
++t;
return *s;
}