1*0171e236SConstantin Kronbichler // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c11 -Wno-pointer-arith -Wno-gnu-alignof-expression -Wno-unused -pedantic-errors 2*0171e236SConstantin Kronbichler 3*0171e236SConstantin Kronbichler static void *a(void); // expected-error {{function 'a' has internal linkage but is not defined}} 4*0171e236SConstantin Kronbichler static void *b(void); // expected-error {{function 'b' has internal linkage but is not defined}} 5*0171e236SConstantin Kronbichler static void *c(void); // expected-error {{function 'c' has internal linkage but is not defined}} 6*0171e236SConstantin Kronbichler static void *d(void); // expected-error {{function 'd' has internal linkage but is not defined}} 7*0171e236SConstantin Kronbichler static void *no_err(void); 8*0171e236SConstantin Kronbichler 9*0171e236SConstantin Kronbichler int main(void) 10*0171e236SConstantin Kronbichler { 11*0171e236SConstantin Kronbichler a; // expected-note {{used here}} 12*0171e236SConstantin Kronbichler 13*0171e236SConstantin Kronbichler int i = _Alignof(no_err); 14*0171e236SConstantin Kronbichler 15*0171e236SConstantin Kronbichler int j = _Generic(&no_err, void *(*)(void): 0); 16*0171e236SConstantin Kronbichler 17*0171e236SConstantin Kronbichler void *k = _Generic(&no_err, void *(*)(void): b(), default: 0); // expected-note {{used here}} 18*0171e236SConstantin Kronbichler 19*0171e236SConstantin Kronbichler // FIXME according to the C standard there should be no error if the undefined internal is 20*0171e236SConstantin Kronbichler // "part of the expression in a generic association that is not the result expression of its generic selection;" 21*0171e236SConstantin Kronbichler // but, currently, clang wrongly emits an error in this case 22*0171e236SConstantin Kronbichler k = _Generic(&no_err, void *(*)(void): 0, default: c()); // expected-note {{used here}} 23*0171e236SConstantin Kronbichler 24*0171e236SConstantin Kronbichler k = _Generic(&no_err, int (*)(void) : 0, default : d()); // expected-note {{used here}} 25*0171e236SConstantin Kronbichler 26*0171e236SConstantin Kronbichler int l = sizeof(no_err); 27*0171e236SConstantin Kronbichler 28*0171e236SConstantin Kronbichler __typeof__(&no_err) x; 29*0171e236SConstantin Kronbichler } 30