GCC 4.3 related build problems: duplicate function parameters

<p>

GCC 4.3 now prints an error message when C++ code contains duplicate
function parameter names in function prototypes.  You'd think that's a
pretty obvious problem, but we still have about 15 packages in the archive
that contain such code.

</p>

<p>

Anyway, for code like this:

</p>

<pre>
class foo {
    foo(int w, int w);
};
</pre>

<p>

GCC will as of 4.3 show the following error message:

</p>

<pre>
t.cc:2: error: multiple parameters named 'w'
</pre>

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