Man pages for linux software development

Maybe I'm just a bit dense tonight, but it took me about 30 minutes of searching to find this answer. If you're going to be using any of the C/C++ system calls, such as fork or dup2, and would like to have their man pages local, install the manpages-dev package like so:

sudo apt-get install manpages-dev

I'm a bit surprised they weren't included in the build-essential package.