Arch Linux provides for several methods of kernel compilation.
Choose one of the following:
1. Custom kernel, the traditional way
This method involves manually downloading a source tarball, and building in your home directory as normal user. Once configured, two compilation/installation methods are offered; the traditional manual method as well as makepkg/pacman.
2. Custom kernel, using ABS.
This method allows for custom kernel compilation using the Arch Build System, or ABS. It provides a PKGBUILD file to modify for your needs.