[PATCH 0/6] Modifications in building emacs packages.

[Alex Kost <alezost@gmail.com>]

Hello, currently we use either 'emacs' or 'emacs-no-x' to build
(byte-compile) emacs packages.  What about making a really minimal emacs
to use for this task?

Most of the times it should be enough.  AFAICT the only case where a
full-featured emacs is needed is auctex; and for this particular case,
'emacs-build-system' uses 'emacs'.  Instead I suggest to use
'emacs-minimal' by default; and when a full 'emacs' will be needed, it
can be specified in native-inputs.  WDYT?

Another change made by this patchset is moving all "emacs" inputs to
'native-inputs'.  There is no point to use 'inputs' because this emacs
is used only to make *.elc files and to generate autoloads; you will use
emacs from your profile anyway.

[PATCH 1/6] gnu: Add emacs-minimal.
[PATCH 2/6] build-system/emacs: Use "emacs" from native-inputs if specified.
[PATCH 3/6] build-system/emacs: Use 'emacs-minimal' as default emacs for building.
[PATCH 4/6] gnu: emacs-auctex: Use 'emacs' for byte-compiling.
[PATCH 5/6] gnu: Move emacs for building from inputs to native-inputs.
[PATCH 6/6] gnu: Use 'emacs-minimal' instead of 'emacs-no-x'.