Andrey Tarasevich <atarasevich at comcast dot net> changed:

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                 CC|                            |atarasevich at comcast dot net

--- Comment #10 from Andrey Tarasevich <atarasevich at comcast dot net> ---
(In reply to Andrew Pinski from comment #8)
> This code is undefined I think (and really it is not valid C90/C99 code).

You are absolutely right - this code is not valid from the point of view of
formal standard C language. It is illegal to provide multiple definitions of
external objects with the same name.

However, this is a popular extension in C implementations with Unix heritage.
So, this entry is about the intended non-standard behavior of GCC

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