10:2(9): preprocessor error: Redefinition of macro x 2 30:5(9): preprocessor error: Redefinition of macro abc 4 50:8(9): preprocessor error: Redefinition of macro foo 6 70:11(9): preprocessor error: Redefinition of macro bar 8 90:14(9): preprocessor error: Redefinition of macro biff 10 110:17(9): preprocessor error: Redefinition of macro oper 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31