gcc/testsuite/gcc.dg/Wc90-c99-compat-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-std=gnu90 -Wpedantic -Wc90-c99-compat" } */
   3
   4 _Bool b; /* { dg-warning "ISO C90 does not support boolean types" } */
   5 _Complex double c = __builtin_complex (0.0, 0.0); /* { dg-warning "ISO C90 does not support complex types" } */
   6 long long l; /* { dg-warning "ISO C90 does not support .long long." } */
   7 struct A { int i; char a[]; }; /* { dg-warning "ISO C90 does not support flexible array members" } */
   8 struct { long int b: 2; } s; /* { dg-warning "type of bit-field .b. is a GCC extension" } */
   9 const const int i; /* { dg-warning "duplicate .const." } */
  10 volatile volatile v; /* { dg-warning "duplicate .volatile." } */
  11
  12 struct S { int a[2]; };
  13 extern struct S foo (void);
  14
  15 #define V(v, ...) (v, __VA_ARGS) /* { dg-warning "anonymous variadic macros were introduced in C99" } */
  16
  17 enum { E, }; /* { dg-warning "comma at end of enumerator list" } */
  18
  19 void fn1 (char [*]); /* { dg-warning "ISO C90 does not support .\\\[\\\*\\\]. array declarators" } */
  20
  21 void
  22 fn2 (char x[static 4]) /* { dg-warning "ISO C90 does not support .static. or type qualifiers" } */
  23 {
  24   int i = (int) { 1 }; /* { dg-warning "ISO C90 forbids compound literals" } */
  25   struct A a = { .i = 3 }; /* { dg-warning "ISO C90 forbids specifying subobject to initialize" } */
  26 }
  27
  28 void
  29 fn3 (int n)
  30 {
  31   n = 3;
  32   int i; /* { dg-warning "ISO C90 forbids mixed declarations and code" } */
  33 }
  34
  35 void
  36 fn4 (int n)
  37 {
  38   n = 3;
  39   __extension__ int i; /* { dg-warning "ISO C90 forbids mixed declarations and code" } */
  40 }
  41
  42 void
  43 fn5 (void)
  44 {
  45   (foo ()).a[0]; /* { dg-warning "ISO C90 forbids subscripting non-lvalue array" } */
  46 }
  47
  48 #define F(a) a
  49
  50 void
  51 fn6 (void)
  52 {
  53   F(); /* { dg-warning "invoking macro F argument" } */
  54 }
  55
  56 void fn7 (int n, int a[n]); /* { dg-warning "ISO C90 forbids variable length array .a." } */