proposal for make help chain-build text

[Jonathan Underwood]

2008/9/28 Patrice Dumas <pertusus at free.fr>:
> Hello,
>
> Here is a proposal for the result of make help for the chain-build
> target, what I changed relates with : and prallel builds:
>
>        chain-build             Build current package in order with
> other packages
>                example:  make chain-build CHAIN='libwidget libgizmo'
>                The current package is added to the end of the CHAIN list.
>                Colons (:) can be used in the CHAIN parameter to define
>                parallely built package groups.
>                Packages in a single group will be built in parallel,
>                and all packages in a group must build successfully and
>                populate the repository before the next group will begin building.
>                For example
>                make chain-build CHAIN='libwidget libaselib : libgizmo
> :'
>                will cause libwidget and libaselib to be build in parallel,
>                followed by libgizmo and then the current directory package.
>                If no groups are defined, packages will be built sequentially.

Does chain-build also allow for boostrapping situation i.e. could one do

make chain-build CHAIN='libwidget libaselib : libgizmo : libwidget

to rebuild libwidget against the newly built libgizmo ?

J.