Re: 'How makefiles are remade'

[Jim]

Noel Yap wrote:
> Paul D. Smith wrote:
>
> > Making it work the way you want (if I understand you correctly), where
> > steps 2 and 3 are performed in a loop so that the re-exec happens
> > immediately when each makefile is rebuilt instead of after all the
> > makefiles are rebuilt, is simply not the way make is designed.  Trying
> > to make it behave this way is extremely tricky, as shown by my example.
Yeah - I took some moments to put some tracing statements into remake.c, 
did figure out when makefile targets were being processed... however, 
that loop is like 4 way resursive - that is there's at least 4 places 
where the update_file() routine is called, and getting them all to 
understand that this is a result that needs to be immediately returned 
is definatly not simple :)
> IMHO, it's also a gross hack that'll slow down make processing 
> considerably; for each target built, make would have to check if the 
> target was included -- that can potentially be lots of checks.
Actually - that's not a big deal, in fact the file structure could 
easily just have a status bit indicating it satisfied a search for a 
included makefile rule...

But, That remake loop *shakes his head* that'll take some cipherin'.

Jim

> Noel