[Mingw-users] gcc 3.4.5: flexible array and initializer element error

[Vincent T. <vt...@un...>]

Hey

I have a problem with flexible array and gcc 3.4.5. Basically:


typedef struct Desc Desc;
struct Desc
{
   void (*func)(int i);
   int i;
};

typedef struct Foo Foo;
struct Foo
{
   const char *name;
   const Desc desc[];
};

#define CALLBACK(cb,i) { cb, i }
#define SENTINEL { NULL, 0 }

const Foo foo = {
   "foo",
   {
     CALLBACK(my_f, 1),
     CALLBACK(my_cb, 2),
     SENTINEL
   }
};


1) When my_f() is a static function no problem
2) When my_cb() is a function that is defined in a dll, I have the error:

struct.c:33: error: initializer element is not constant
struct.c:33: error: (near initialization for `foo.desc[1].func')
struct.c:33: error: initializer element is not constant
struct.c:33: error: (near initialization for `foo.desc[1]')
struct.c:34: error: initializer element is not constant
struct.c:34: error: (near initialization for `foo.desc[2]')
struct.c:35: warning: initialization of a flexible array member
struct.c:35: warning: (near initialization for `foo.desc')
struct.c:35: error: initializer element is not constant
struct.c:35: error: (near initialization for `foo.desc')

On linux (newer gcc, though), there is no problem. I didn't try with MinGW 
gcc >= 4.*

I have attached the 3 files that I used to test that problem (compilation 
commands are at the top of each source file).

Does someone know how I can use a function in a DLL in a flexible array ?

thank you

Vincent Torri