Hi all,

I ported Stuart's confcache patch from portage .50 to .51_rc7 (hope cvs head 
isn't too different...). I also made a few changes and fixes - see attached 
changelog if you used the orig patch.

What this does: it keeps a central cache for autoconf-generated configure 
scripts in /var/tmp. When econf is called, it checks the cache's validity 
against a list of files & md5sums. If any files have changed, the entire 
cache is cleared.

During configure's run, the sandbox logs all files accessed. There is a small 
patch to libsandbox.c, unchanged from Stuart's version, to allow this. Then, 
the file/md5sum list is updated. The sandbox log then has to be manually 
fixed up to remove these entries.

Ebuild-side: FEATURES+=confcache enables this. Either use econf, or call 
confcache_start and confcache_stop before and after your configure run. 
confcache_start adds the --with-cache=foo parameter to $ECONF_EXTRA; pass 
that to configure.

Embedded people: I've been asked to keep a separate cache for every 
combination of $CHOST, $CBUILD, $THOST. Please confirm that's how you want 
it.

Myself, I need it to speed up the upcoming split kde ebuilds (eg separate 
ebuilds for konqueror etc rather than one big kdebase ebuild).

Stuart, I hope you're ok with my changes. Basically they just consist of 
updating the patch for the new version's ebuild.sh and fixing a couple of 
bugs.

Comments welcome (my first patch to portage, hope it works :-). Credit goes to 
Stuart, really.

-- 
Dan Armak
Gentoo Linux developer (KDE)
Matan, Israel
Public GPG key: http://dev.gentoo.org/~danarmak/danarmak-gpg-public.key
Fingerprint: DD70 DBF9 E3D4 6CB9 2FDD  0069 508D 9143 8D5F 8951