Re: multilib and Makefile regeneration

[Paolo Bonzini]

On 08/31/2009 11:11 PM, Ralf Wildenhues wrote:
> The easiest for now would be (3), the coolest, most difficult and
> probably most dangerous one would be (2).  Something like
>    AC_CONFIG_FILES_COMMANDS(some/Makefile, more-user-commands,
>                             [more-init-cmds])
>
> but then the order of issuing this and the respective
>    AC_CONFIG_FILES(some/Makefile)
>
> would be significant.  I don't see any way to avoid this.

You could specify that AC_CONFIG_FILES comes first, and *_COMMANDS 
occurrences come later in the order that appears in the source (and do 
nothing unless the corresponding AC_CONFIG_FILES exists).

The simplest implementation would amount to two m4_append (actually one 
m4_append plus one _AC_CONFIG_COMMANDS_INIT) in 
AC_CONFIG_FILES_COMMANDS, and an m4_ifdef in _AC_CONFIG_REGISTER_DEST.

Paolo