Re: bootstrap: allow more than one submodule

[Bruno Haible]

Hi Eric,

> What's the use case for updating some, but not all, submodules?

Imagine a package that has submodules 'gnulib', 'libxml', 'libcroco'
(like GNU gettext might have). It would be perfectly normal for the
developer to stay with the last known good libxml and libcroco but
try the newest gnulib.

Or a package that has submodules 'readline' and 'gnulib' (GNU bash may
come to mind). It would be reasonable for this developer to update
readline to the newest development version but stay at a stable gnulib.

You are the pioneer of the use of submodules. That's why currently gnulib
is the only submodule in some packages. But that's certainly going to
change over time.

Bruno