typedef Union in a header file for loadlibrary

Hello,

I want to include some c++ dlls into Matlab. One of the
header-files defines a union e.g.

typedef union
{
int a;
unsigned int b;
} union_AB;

which is used to call one of the dll-functions. When I
include this header I get the warning

Failed to parse type 'union { int a ; unsigned int b ; }
union_AB' original input 'union { int a ; unsigned int b ; }
union_AB'.

It's possile to use unions as variables and there is no
problem, if I try to typedef a struct or any other type.
What is the reason for this, and is it possible to avoid it?


Thanks,
Lars
.

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