Which deb package contains the C Lib Reference manual?

["Michael Yang" <michael.yxf@gmail.com>]

I wanna to reference the help of C library using "man" command, i.g. "man strcpy", what package should I have?

I have had "gcc gcc-base gcc-doc gcc-4.1 gcc-base-4.1 gcc-doc-4.1" installed on my system.
What should I add for the help available on my system?

your help would be greatly appreciated.
Thanks.