1 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic 2 3 typedef const char rchar; a(char * a,rchar * b)4int a(char* a, rchar* b) { 5 return a-b; 6 } 7 f0(void (* fp)(void))8void f0(void (*fp)(void)) { 9 int x = fp - fp; // expected-warning{{arithmetic on pointers to the function type 'void (void)' is a GNU extension}} 10 } 11