Passing static array to C variadic function

[Daniel Gibson via Digitalmars-d]

Hi,
I have a C variadic function (passed from C code into my D code via 
function pointer) that I need to call with a static array.

So according to the D documentation, static arrays are passed by value 
in D2 and by reference in C and D1.
(Even though http://dlang.org/abi.html claims "Static arrays are passed 
as pointers to their first element." - I guess this just wasn't updated 
for D2)

For "normal" functions http://dlang.org/interfaceToC.html tells me to 
add a "ref" in the function signature, to tell D to pass it by reference 
(couldn't this be implicit for extern (C) functions?) - But I obviously 
can't to this for vararg function arguments.

So let's imagine the following code:

  extern (C) alias funPtr_t = ptrdiff_t function( ptrdiff_t arg, ... );

  funPtr_t fun = ...; // is assigned somewhere..

  void bla( float[3] v ) {
      fun( 42, v );
  }

This produces the following compiler error (DMD 2.065 linux amd64):
"Error: cannot pass static arrays to extern(C) vararg functions"

/However/, if I typedef a float[3] type, the compiler does not complain 
(not sure if the code behaves like expected, though, or if it's still 
passed by value instead of by reference as expected by the C code):

  typedef float[3] vec3_t;

  void bla( vec3_t v ) {
      fun( 42, v );
  }

Then again, if I use alias instead of the deprecated typedef:
  alias vec3_t = float[3];
I again get "Error: cannot pass static arrays to extern(C) vararg 
functions".


Is there a "proper" way to make this work?
If not, any ideas for a viable workaround?

Cheers,
Daniel