Re: When do I need autogen and configure?

[Thorsten Meyer]

Jaroslav Hajek wrote:
> On Sun, Jan 25, 2009 at 12:01 PM, Thorsten Meyer <address@hidden> wrote:
>> Hi,
>>
>> new patches have been commited to savannah at an amazing rate lately and I
>> certainly hope that it stays like this :-).
>> However, with my rather old computer, it gets increasingly difficult to keep 
>> my
>> mercurial octave up to date, because building octave takes so long (even with
>> ccache).
>>
>> My question in this context:
>> How can I figure out, if I really need to rerun autogen or configure to build
>> octave? Could there be a way to let the Makefiles figure it out for 
>> themselves?
>>
>> thanks
>>
>> Thorsten
>>
>>
> 
> In general, you need to rerun configure if any of the Makefile.in
> files changed. You need to rerun autogen.sh if configure.in changed.
> Sometimes there are ways how to cheat - for instance, you can reflect
> the change in a Makefile manually, avoiding the recompilation of
> untouched code.
> 

It seems that configure always regenerates all Makefiles. I would like to try
and change the part of configure that generates Makefiles out of Makefiles.in
such that it only does so when the corresponding Makefile.in has changed. Can
somebody point to the right place in the code?

thanks

Thorsten