I'm using Cygwin, and just discovered to my dismay that the package naming scheme is derived from Red Hat. I need the development man pages, called manpages-dev and manpages-posix-dev on Debian-based distros, and can't locate the Cygwin/RH equivalents. What are they?
If they're not available, what's the canonical documentation to use in their place for Cygwin?
There's a fair number of C library manpages in the cygwin-doc package, but it's by no means complete. Cygwin aims for POSIX and Linux compatibility though, so the POSIX standard at http://www.opengroup.org/onlinepubs/9699919799 and the glibc documentation at http://www.gnu.org/software/libc/manual are appropriate sources. The Linux manpages at http://linux.die.net are useful too.
Documentation of Cygwin-specific functions as well as a list of standard functions that have not been implemented can be found at http://cygwin.com/cygwin-api/cygwin-api.html.