gnu-flags.c revision 5f33c37f8fe476602d9a1cc968060f6113ec8aaa 
1// RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wno-gnu
2// RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wgnu
3// RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wno-gnu \
4// RUN:   -Wgnu-alignof-expression -Wgnu-case-range -Wgnu-complex-integer -Wgnu-conditional-omitted-operand \
5// RUN:   -Wgnu-empty-initializer -Wgnu-label-as-value -Wgnu-statement-expression \
6// RUN:   -Wgnu-compound-literal-initializer -Wgnu-flexible-array-initializer \
7// RUN:   -Wgnu-redeclared-enum  -Wgnu-folding-constant -Wgnu-empty-struct \
8// RUN:   -Wgnu-union-cast -Wgnu-variable-sized-type-not-at-end
9// RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wgnu \
10// RUN:   -Wno-gnu-alignof-expression -Wno-gnu-case-range -Wno-gnu-complex-integer -Wno-gnu-conditional-omitted-operand \
11// RUN:   -Wno-gnu-empty-initializer -Wno-gnu-label-as-value -Wno-gnu-statement-expression \
12// RUN:   -Wno-gnu-compound-literal-initializer -Wno-gnu-flexible-array-initializer \
13// RUN:   -Wno-gnu-redeclared-enum -Wno-gnu-folding-constant -Wno-gnu-empty-struct \
14// RUN:   -Wno-gnu-union-cast -Wno-gnu-variable-sized-type-not-at-end
15// Additional disabled tests:
16// %clang_cc1 -fsyntax-only -verify %s -DALIGNOF -Wno-gnu -Wgnu-alignof-expression
17// %clang_cc1 -fsyntax-only -verify %s -DCASERANGE -Wno-gnu -Wgnu-case-range
18// %clang_cc1 -fsyntax-only -verify %s -DCOMPLEXINT -Wno-gnu -Wgnu-complex-integer
19// %clang_cc1 -fsyntax-only -verify %s -DOMITTEDOPERAND -Wno-gnu -Wgnu-conditional-omitted-operand
20// %clang_cc1 -fsyntax-only -verify %s -DEMPTYINIT -Wno-gnu -Wgnu-empty-initializer
21// %clang_cc1 -fsyntax-only -verify %s -DLABELVALUE -Wno-gnu -Wgnu-label-as-value
22// %clang_cc1 -fsyntax-only -verify %s -DSTATEMENTEXP -Wno-gnu -Wgnu-statement-expression
23// %clang_cc1 -fsyntax-only -verify %s -DCOMPOUNDLITERALINITIALIZER -Wno-gnu -Wgnu-compound-literal-initializer
24// %clang_cc1 -fsyntax-only -verify %s -DFLEXIBLEARRAYINITIALIZER -Wno-gnu -Wgnu-flexible-array-initializer
25// %clang_cc1 -fsyntax-only -verify %s -DREDECLAREDENUM -Wno-gnu -Wgnu-redeclared-enum
26// %clang_cc1 -fsyntax-only -verify %s -DUNIONCAST -Wno-gnu -Wgnu-union-cast
27// %clang_cc1 -fsyntax-only -verify %s -DVARIABLESIZEDTYPENOTATEND -Wno-gnu -Wgnu-variable-sized-type-not-at-end
28// %clang_cc1 -fsyntax-only -verify %s -DFOLDINGCONSTANT -Wno-gnu -Wgnu-folding-constant
29// %clang_cc1 -fsyntax-only -verify %s -DEMPTYSTRUCT -Wno-gnu -Wgnu-empty-struct
30
31#if NONE
32// expected-no-diagnostics
33#endif
34
35
36#if ALL || ALIGNOF
37// expected-warning@+4 {{'_Alignof' applied to an expression is a GNU extension}}
38#endif
39
40char align;
41_Static_assert(_Alignof(align) > 0, "align's alignment is wrong");
42
43
44#if ALL || CASERANGE
45// expected-warning@+5 {{use of GNU case range extension}}
46#endif
47
48void caserange(int x) {
49  switch (x) {
50  case 42 ... 44: ;
51  }
52}
53
54
55#if ALL || COMPLEXINT
56// expected-warning@+3 {{complex integer types are a GNU extension}}
57#endif
58
59_Complex short int complexint;
60
61
62#if ALL || OMITTEDOPERAND
63// expected-warning@+3 {{use of GNU ?: conditional expression extension, omitting middle operand}}
64#endif
65
66static const char* omittedoperand = (const char*)0 ?: "Null";
67
68
69#if ALL || EMPTYINIT
70// expected-warning@+3 {{use of GNU empty initializer extension}}
71#endif
72
73struct { int x; } emptyinit = {};
74
75
76#if ALL || LABELVALUE
77// expected-warning@+6 {{use of GNU address-of-label extension}}
78// expected-warning@+7 {{use of GNU indirect-goto extension}}
79#endif
80
81void labelvalue() {
82	void *ptr;
83	ptr = &&foo;
84foo:
85	goto *ptr;
86}
87
88
89#if ALL || STATEMENTEXP
90// expected-warning@+5 {{use of GNU statement expression extension}}
91#endif
92
93void statementexp()
94{
95	int a = ({ 1; });
96}
97
98
99#if ALL || COMPOUNDLITERALINITIALIZER
100// expected-warning@+4 {{initialization of an array of type 'int [5]' from a compound literal of type 'int [5]' is a GNU extension}}
101#endif
102
103typedef int int5[5];
104int cli[5] = (int[]){1, 2, 3, 4, 5};
105
106
107#if ALL || FLEXIBLEARRAYINITIALIZER
108// expected-note@+6 {{initialized flexible array member 'y' is here}}
109// expected-warning@+6 {{flexible array initialization is a GNU extension}}
110#endif
111
112struct fai {
113  int x;
114  int y[];
115} fai = { 1, { 2, 3, 4 } };
116
117
118#if ALL || FOLDINGCONSTANT
119// expected-warning@+5 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
120// expected-warning@+7 {{variable length array folded to constant array as an extension}}
121#endif
122
123enum {
124	fic = (int)(0.75 * 1000 * 1000)
125};
126static const int size = 100;
127void foo(void) { int data[size]; }
128
129#if ALL || REDECLAREDENUM
130// expected-note@+4 {{previous definition is here}}
131// expected-warning@+8 {{redeclaration of already-defined enum 'RE' is a GNU extension}}
132#endif
133
134enum RE {
135  Val1,
136  Val2
137};
138
139enum RE;
140
141
142#if ALL || UNIONCAST
143// expected-warning@+4 {{cast to union type is a GNU extension}}
144#endif
145
146union uc { int i; unsigned : 3; };
147union uc w = (union uc)2;
148
149
150#if ALL || VARIABLESIZEDTYPENOTATEND
151// expected-warning@+8 {{field 'hdr' with variable sized type 'struct vst' not at the end of a struct or class is a GNU extension}}
152#endif
153
154struct vst {
155 short tag_type;
156 char tag_data[];
157};
158struct vstnae {
159  struct vst hdr;
160  char data;
161};
162
163
164#if ALL || EMPTYSTRUCT
165// expected-warning@+4 {{empty struct is a GNU extension}}
166// expected-warning@+4 {{struct without named members is a GNU extension}}
167#endif
168
169const struct {} es;
170struct {int:5;} swnm;
171
172