Re: RFC: Cross compiling Emacs with qemu-user

[Stefan Monnier <monnier@iro.umontreal.ca>]

> * In principle, would this be something Emacs would want to support?

I';ll let Eli and John chime in, but I don't see any reason why not.

> * What would need to be done to make the patch below acceptable?

Good question.  Some comments below.

>  EMACS = ${top_builddir}/src/emacs
> -emacs = EMACSLOADPATH= "${EMACS}" -batch --no-site-file --no-site-lisp
> +emacs = EMACSLOADPATH= ${EMACS} -batch --no-site-file --no-site-lisp

I'm not sure if Emacs can be built currently in a directory whose full
name includes spaces, but it's something that *should* work.  The above
would break it AFAICT, so we need some other solution.

> +AC_ARG_WITH([emulator],[AS_HELP_STRING([--with-emulator=EMULATOR],
> +    [Emulator to use when executing target binaries])],
> +    EMULATOR="$withval"
> +    AC_SUBST(EMULATOR))

It'd be good to make the doc slightly more precise (i.e. clarify that
it specifies an actual *command* rather than just which kind of
emulator we want to use).

> -RUN_TEMACS = ./temacs
> +RUN_TEMACS = temacs

Why did you need to get rid of the "./"?  It's needed to tell the shell
not to search through $PATH but in the cwd instead.

> -	$(MAKE) -C ../admin/unidata all EMACS="../$(bootstrap_exe)"
> +	$(MAKE) -C ../admin/unidata all EMACS="$(EMULATOR) $(bootstrap_exe)"

Hmm... how will $(EMULATOR) know to look in ../ ?


        Stefan