ref: f2fe6bc81e714ea3e422a0513ac171c9b2101646
dir: /tests/cc/execute/0152-cat.c/
#define CAT(x,y) x ## y #define XCAT(x,y) CAT(x,y) #define FOO foo #define BAR bar int foobar; int main(void) { int foo = 1, bar = 0; CAT(foo,bar) += foo + bar; if (foobar != 1) return 1; XCAT(FOO,BAR) += foo + bar; if (foobar != 2) return 2; return 0; }