FAQ 1.12--auto keyword

The faq (question 1.12) states that the keyword "auto" is completely
useless.
However, it is necessary to forward declare a nested function (for
gcc...I'm not sure if this is gcc specific or a language issue.)
In other words:

int
main(void)
{
AUTO int foo(void);
return 0;

int foo (void)
{
return 0;
}
}

is valid only if AUTO is "auto" and not empty. Is this a language
issue, or is allowing the forward declaration a gcc extension?
If a language issue, should the FAQ be modified?

.

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