emacs/runtime/compiler/README.txt

This directory contains Vim scripts to be used with a specific compiler.
They are used with the ":compiler" command.

These scripts usually set options, for example 'errorformat'.
See ":help write-compiler-plugin".

If you want to write your own compiler plugin, have a look at the other files
for how to do it, the format is simple.

If you think a compiler plugin you have written is useful for others, please
send it to Bram@vim.org.