Re: request for timings - makedepend

[Mark Mitchell <mark at codesourcery dot com>]

Daniel Jacobowitz wrote:
> On Mon, Mar 07, 2005 at 07:56:05PM -0800, Mark Mitchell wrote:
>
> > We do need a story for generated headers.  I'd be happy with explicit 
> > dependencies in the Makefiles indicating what source files depend on 
> > what generated headers.  We'd still be able to get rid of 99% of the 
> > dependencies in our Makefiles, and avoid most of the cases where 
> > something either (a) fails to get rebuilt, or (b) gets rebuilt too often.
>
>
> Except, this is the most frequently reported dependency problem -
> missing dependencies on the generated headers lead to parallel build
> failure.

I didn't realize that.  Yes, something that depends on appropriate 
coding conventions in the #include'ing files, seems reasonable.  Maybe 
cpplib could even be hacked to have a mode where (when generating 
dependencies) it silently permits #include of an non-existing file, 
considers it a dependency in the current directory, and just keeps 
going?  I have insufficient cpplib taste to know whether or not that's a 
truly awful idea. :-)

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304