ref: 37e4ca9b85b68ca0441c18c2f4fbf24c866e38cb dir: /tests/execute/0149-define.c/
#define M(x) x #define A(a,b) a(b) int main(void) { char *a = A(M,"hi"); return (a[1] == 'i') ? 0 : 1; }