| // RUN: %clang_cc1 -fsyntax-only -verify -Wno-strict-prototypes %s |
| |
| // rdar: // 8125274 |
| static int a16[]; // expected-warning {{tentative array definition assumed to have one element}} |
| |
| void f16(void) { |
| extern int a16[]; |
| } |
| |
| |
| // PR10013: Scope of extern declarations extend past enclosing block |
| extern int PR10013_x; |
| int PR10013(void) { |
| int *PR10013_x = 0; |
| { |
| extern int PR10013_x; |
| extern int PR10013_x; |
| } |
| |
| return PR10013_x; // expected-error{{incompatible pointer to integer conversion}} |
| } |
| |
| static int test1_a[]; // expected-warning {{tentative array definition assumed to have one element}} |
| extern int test1_a[]; |
| |
| // rdar://13535367 |
| void test2declarer(void) { extern int test2_array[100]; } |
| extern int test2_array[]; |
| int test2v = sizeof(test2_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}} |
| |
| void test3declarer(void) { |
| { extern int test3_array[100]; } |
| extern int test3_array[]; |
| int x = sizeof(test3_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}} |
| } |
| |
| void test4(void) { |
| extern int test4_array[]; |
| { |
| extern int test4_array[100]; |
| int x = sizeof(test4_array); // fine |
| } |
| int x = sizeof(test4_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}} |
| } |
| |
| // Test that invalid local extern declarations of library |
| // builtins behave reasonably. |
| extern void abort(void); // expected-note 2 {{previous declaration is here}} |
| extern float *calloc(void); // expected-warning {{incompatible redeclaration of library function}} expected-note {{is a builtin}} expected-note 2 {{previous declaration is here}} |
| void test5a(void) { |
| int abort(void); // expected-error {{conflicting types}} |
| float *malloc(void); // expected-warning {{incompatible redeclaration of library function}} expected-note 2 {{is a builtin}} |
| int *calloc(void); // expected-error {{conflicting types}} |
| } |
| void test5b(void) { |
| int abort(void); // expected-error {{conflicting types}} |
| float *malloc(void); // expected-warning {{incompatible redeclaration of library function}} |
| int *calloc(void); // expected-error {{conflicting types}} |
| } |
| void test5c(void) { |
| void (*_abort)(void) = &abort; |
| void *(*_malloc)() = &malloc; |
| float *(*_calloc)() = &calloc; |
| } |
| |
| void test6(void) { |
| extern int test6_array1[100]; |
| extern int test6_array2[100]; |
| void test6_fn1(int*); |
| void test6_fn2(int*); |
| { |
| // Types are only merged from visible declarations. |
| char test6_array2; |
| char test6_fn2; |
| { |
| extern int test6_array1[]; |
| extern int test6_array2[]; |
| (void)sizeof(test6_array1); // ok |
| (void)sizeof(test6_array2); // expected-error {{incomplete type}} |
| |
| void test6_fn1(); |
| void test6_fn2(); |
| test6_fn1(1.2); // expected-error {{passing 'double' to parameter of incompatible type 'int *'}} |
| // FIXME: This is valid, but we should warn on it. |
| test6_fn2(1.2); |
| } |
| } |
| } |