-std=gnu99 and casted empty srtuct initializers

[marcus]

>Category:       c
>Synopsis:       -std=gnu99 and casted empty srtuct initializers
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Class:          rejects-legal
>Submitter-Id:   net
>Originator:     Marcus Brinkmann
>Release:        gcc (GCC) 3.2 (20020809) Debian prerelease
>Environment:
i386-gnu
>Description:
This bug only occurs with -std=gnu99.

Initializing an empty struct with an empty struct does not
work if the empty struct is explicitely casted to the struct
type.  GCC bails out with "initializer element not constant"
>How-To-Repeat:
Compile the following code with "gcc -std=gnu99":

typedef struct { } foo_t;

/* This one works.  */
foo_t bar = { };

/* This one fails with "initializer element is not constant.  */
foo_t baz = (foo_t) { };

int
main ()
{
  return 0;
}
>Fix:

>Unformatted: