[Bug c/49182] Fordward declarations of struct not usable in function pointer types.

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49182

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-05-26 
23:36:43 UTC ---
This works:
// Forward declaration
typedef struct _a a;

// Pointer to function with struct as parameter
typedef int (*FxnPointer)(a* WontComplie);

// Actual declaration of struct with function pointer type declared above.
struct _a
{
    int foo;
    int bar;
    FxnPointer PtrToFxn;
};

int main(void)
{
    a test_struct;

    return 0;
}