wrong excess elements warning

[Ulrich Drepper]

gcc recently started to warn incorrectly about something like

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$ cat u.c
struct
{
  int n;
  int a[0];
} foo =
{
  10,
  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }
};
$ gcc -c u.c
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
u.c:8: warning: excess elements in array initializer
u.c:8: warning: (near initialization for `foo.a')
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Arrays of Zero Length are a documented and often used gcc extension.
The warning must only be give if -pedantic is used.

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