## Can link against custom targets

The output of `custom_target` and `custom_target[i]` can be used in `link_with` and
`link_whole` keyword arguments. This is useful for integrating custom
code generator steps, but note that there are many limitations:

 - Meson can not know about link dependencies of the custom target. If
   the target requires further link libraries, you need to add them manually

 - The user is responsible for ensuring that the code produced by
   different toolchains are compatible.

 - `custom_target` may only be used when it has a single output file. 
   Use `custom_target[i]` when dealing with multiple output files.

 - The output file must have the correct file name extension.