Which package to install if I want to have the man page for strdup?

[Peng Yu]

On Fri, Jan 1, 2010 at 5:56 PM, Joshua Root <jmr at macports.org> wrote:
> On 2010-1-2 10:40 , Peng Yu wrote:
>> I don't have manpage for strdup. Could somebody let me know which
>> package I should install?
>
> Man pages are generally installed by the same port as the software they
> document, but of course we don't have a libc port. Mac OS X ships with a
> strdup man page AFAICT, but if I'm mistaken, the other candidate would
> be Xcode Tools.

I have Xcode installed on Mac OS 10.5. Why I don't have man strdup?
How to fix it?