gcc/testsuite/gcc.dg/wtr-func-def-1.c

   1 /* Test for -Wtraditional warnings on ISO C function definitions.
   2    Note, gcc should omit these warnings in system header files.
   3    Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 6/30/2002.  */
   4 /* { dg-do compile } */
   5 /* { dg-options "-Wtraditional -std=gnu89" } */
   6
   7 /* Test some simple cases.  */
   8
   9 void f_void1 (void) /* { dg-warning "traditional C rejects ISO C style" } */
  10 {
  11   return;
  12 }
  13
  14 void f_void2 ()
  15 {
  16   return;
  17 }
  18
  19 void f_int1 (int f) /* { dg-warning "traditional C rejects ISO C style" } */
  20 {
  21   return;
  22 }
  23
  24 void f_int2 (f)
  25      int f;
  26 {
  27   return;
  28 }
  29
  30 /* Test that we don't ever warn about nested functions.  */
  31
  32 void f_int3 (int f) /* { dg-warning "traditional C rejects ISO C style" } */
  33 {
  34   void f3a (void) { return; }
  35   void f3b () { return; }
  36   void f3c (int f) { return; }
  37   void f3d (f) int f; { return; }
  38   void f3e (const char *f, ...) { return; }
  39   return;
  40 }
  41
  42 void f_int4 (int f) /* { dg-warning "traditional C rejects ISO C style" } */
  43 {
  44   void f4a (void) { return; }
  45   void f4b () { return; }
  46   void f4c (int f) { return; }
  47   void f4d (f) int f; { return; }
  48   void f4e (const char *f, ...) { return; }
  49   auto f4f (void) { return 0; }
  50   return;
  51 }
  52
  53 void f_int5 (f)
  54      int f;
  55 {
  56   void f5a (void) { return; }
  57   void f5b () { return; }
  58   void f5c (int f) { return; }
  59   void f5d (f) int f; { return; }
  60   void f5e (const char *f, ...) { return; }
  61   return;
  62 }
  63
  64 void f_int6 (f)
  65      int f;
  66 {
  67   void f6a (void) { return; }
  68   void f6b () { return; }
  69   void f6c (int f) { return; }
  70   void f6d (f) int f; { return; }
  71   void f6e (const char *f, ...) { return; }
  72   auto f6f (void) { return 0; }
  73   return;
  74 }
  75
  76 /* Test that prototypes are silently accepted and function definitions
  77    are still warned about.  */
  78
  79 extern void f_int_p1 (int);
  80 void f_int_p1 (int f) /* { dg-warning "traditional C rejects ISO C style" } */
  81 {
  82   return;
  83 }
  84
  85 extern void f_int_p2 (int f);
  86 void f_int_p2 (int f) /* { dg-warning "traditional C rejects ISO C style" } */
  87 {
  88   return;
  89 }
  90
  91 extern void f_int_p3 (int);
  92 void f_int_p3 (f)
  93      int f;
  94 {
  95   return;
  96 }
  97
  98 extern void f_int_p4 (int f);
  99 void f_int_p4 (f)
 100      int f;
 101 {
 102   return;
 103 }
 104
 105 extern void f_void_p1 ();
 106 void f_void_p1 (void) /* { dg-warning "traditional C rejects ISO C style" } */
 107 {
 108   return;
 109 }
 110
 111 extern void f_void_p2 (void);
 112 void f_void_p2 (void) /* { dg-warning "traditional C rejects ISO C style" } */
 113 {
 114   return;
 115 }
 116
 117 extern void f_blank_p1 ();
 118 void f_blank_p1 ()
 119 {
 120   return;
 121 }
 122
 123 extern void f_blank_p2 (void);
 124 void f_blank_p2 ()
 125 {
 126   return;
 127 }
 128
 129 /* Test some implicit int functions.  */
 130
 131 f_impl1()
 132 {
 133   return 0;
 134 }
 135
 136 f_impl2(void) /* { dg-warning "traditional C rejects ISO C style" } */
 137 {
 138   return 0;
 139 }
 140
 141 f_impl3(int f) /* { dg-warning "traditional C rejects ISO C style" } */
 142 {
 143   return 0;
 144 }
 145
 146 /* Test stdarg functions.  */
 147
 148 f_stdarg1(const char *s, ...) /* { dg-warning "traditional C rejects ISO C style" } */
 149 {
 150   return 0;
 151 }
 152
 153 void f_stdarg2(const char *s, ...) /* { dg-warning "traditional C rejects ISO C style" } */
 154 {
 155   return;
 156 }
 157
 158 extern void f_stdarg3(const char *, ...);
 159 void f_stdarg3(const char *s, ...) /* { dg-warning "traditional C rejects ISO C style" } */
 160 {
 161   return;
 162 }
 163
 164 /* Test handling function pointer parameters.  */
 165
 166 void f_fnptr1 (int f, int (*fp)(int));
 167 void f_fnptr1 (int f, int (*fp)(int)) /* { dg-warning "traditional C rejects ISO C style" } */
 168 {
 169   return;
 170 }
 171
 172 void f_fnptr2 (int f, int (*fp)(int));
 173 void f_fnptr2 (f, fp)
 174      int f;
 175      int (*fp)(int);
 176 {
 177   return;
 178 }
 179
 180 /* Test for main.  */
 181
 182 int
 183 main (int argc, char **argv) /* { dg-warning "traditional C rejects ISO C style" } */
 184 {
 185   return 0;
 186 }
 187
 188 # 182 "sys-header.h" 3
 189 /* We are in system headers now, no -Wtraditional warnings should issue.  */
 190
 191 void fsys1 (void)
 192 {
 193   return;
 194 }
 195
 196 void fsys2 (int f)
 197 {
 198   return;
 199 }
 200
 201 void fsys3 (const char *f, ...)
 202 {
 203   return;
 204 }