Gcc-12 and SWIG problem

[Steve Grubb <sgrubb@xxxxxxxxxx>]

Hello,

I have a FTBFS package, audit, that has a strange problem that I'd like to 
run by the devel list. It is a common idiom in the kernel to do something 
like:

struct foo{
        unsigned int barlen;
        char bar[];
};

There are about 80 instances of this in the kernel headers. When one of these 
headers is included by SWIG, it makes code like this:

  if (arg2) {
    arg1->bar = (char [])(char *)memcpy(malloc((size)*sizeof(char)), (const 
char *)(arg2), sizeof(char)*(size));
  } else {
    arg1->bar = 0;
  }

which results in

    error: cast specifies array type

and

    error: assignment to expression with array type.

Is this intended to be an error by gcc-12?

One fix is to change the struct decalaration to bar[0];  and gcc doesn't error 
out on that. But that will take some time to get in the upstream kernel. Just 
curious if this is intended by gcc or a problem of SWIG/kernel?

Thanks,
-Steve

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