Complex number sup****t

As discussed on comp.lang.c, I am posting about complex number sup****t
in lcc-win32.  I was going to post about a number of issues, but I
think, now, that are mostly related.

I suspect that the problem is either than I simply don't know what I
am doing, or lcc-win32 is missing some basic elements of C99 complex
arithmetic because the first problem is simply this:

-------- 1.c ---------
int main(void)
{
     double _Complex x = 1.0;
     return 0;
}
--- lcc-win32 says ---
Error 1.c: 3 operands of = have illegal types 'struct long double
_Complex' and 'double'
----------------------

This is with or without the -ansic flag.  Adding #include <complex.h>
and the problem is goes away, *unless* -ansic is specified:

-------- 2.c ---------
#include <complex.h>

int main(void)
{
     double _Complex x = 1.0;
     return 0;
}
--- lcc -ansic says ---
Error 2.c: 5  operands of = have illegal types 'struct long double
_Complex' and 'double'
-----------------------

These are so basic that I suspect I am missing something, but I can't
see what.  No programs with complex numbers seem to work when I use
the -ansic flag, but that flag is needed or I can't compile:

-------- 7.c ---------
#include <stdio.h>
#include <complex.h>

int operator = (42);

int main(void)
{
     double _Complex x = 1+2*I;
     printf("%d\n", operator);
     return 0;
}
--- lcc-win32 says ---
Error 7.c: 4  syntax error; found `42' expecting ')'
Error 7.c: 4  skipping `42'
Error 7.c: 4  incorrect number of arguments to operator asgn
Error 7.c: 9  undeclared identifier 'operator'
Warning 7.c: complex-7.c: 9  possible usage of operator before definition
----------------------

A couple of small points (and neither depends on the -ansic flag) are:
_Complex_I seems not to be defined in complex.h and the types of creal
and cimag seem to be wrong:

-------- 5.c ---------
#include <stdio.h>
#include <complex.h>

int main(void)
{
     double _Complex x = _Complex_I;
     printf("%g+%gI\n", creal(x), cimag(x));
     return 0;
}
--- lcc-win32 says ---
Error 5.c: 6  undeclared identifier '_Complex_I'
Warning 5.c: 7  printf argument mismatch for format g. Expected double
got long double
Warning 5.c: 7  printf argument mismatch for format g. Expected double
got long double
Warning 5.c: 6  possible usage of _Complex_I before definition
----------------------

-- 
Ben.