[TUHS] Building programs (Re: Version 256 of systemd boasts '42% less Unix philosophy' The Register

[Chet Ramey via TUHS]

On 6/20/24 8:34 PM, Alexis wrote:
> Warner Losh <imp at bsdimp.com> writes:
> 
>> Isn't that what thecautoconf cache is for?
> 
> There's a cross-project cache? That is, a cache not just for the project 
> for which autoconf was run, but for _all_ software built on that machine?

Well, `all' is pretty broad.

You can set some site-specific defaults:

https://www.gnu.org/software/autoconf/manual/autoconf-2.63/html_node/Site-Defaults.html

and use a site-specific cache file:

https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Cache-Files.html

This cache file can be written by every `configure' run, if you like. It's
just a shell script.

> (Over the decades i've regularly observed instances where autoconf doesn't 
> seem to be making use of results of its previous runs for a particular 
> project; i don't know if that's because the build maintainer didn't 
> configure autoconf correctly.

You have to tell configure to use the cache file.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
		 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet at case.edu    http://tiswww.cwru.edu/~chet/

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