Gentoo Archives: gentoo-dev

From: Pacho Ramos <pacho@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] Adding --as-needed to LDFLAGS in profiles/default/linux/make.defaults
Date: Mon, 28 Jun 2010 08:43:25
Message-Id: 1277714549.6857.1.camel@localhost.localdomain
In Reply to: [gentoo-dev] Adding --as-needed to LDFLAGS in profiles/default/linux/make.defaults by Nirbheek Chauhan
El lun, 28-06-2010 a las 06:39 +0530, Nirbheek Chauhan escribió:
> Hello everyone, > > I'm sure at least half of you are thinking "Oh no, not this again...", > and I agree. However, I'm /also/ thinking "Why the heck haven't we > done this yet?" > > We've been discussing this since 2008, and probably waaay before that > too. The entire discussion about whether we should do this or not has > already passed, there is NO NEED to have that again. This email is > about discussion on what all is *left* before we can do $SUBJECT. > > What prompted this email? libpng-1.4 and many other upgrades that have > left gentoo systems very very broken. We have to resort to random > scripts to fix breakage, which reflects very badly on us. Even worse, > a lot of users just give up and reinstall their system, or don't > upgrade, or just move away from Gentoo. > > I understand that these kind of breakages are inevitable, but with > as-needed, we can reduce their effect *drastically*. Instead of having > to rebuild almost their entire system, the user would only need to > rebuild packages that directly link(ed) to libpng. I honestly think > that we cannot afford to expose our users to any more such upgrades > without as-needed in the default linux profile. > > There's a tracker bug for this, and the problems still remaining are: > http://bugs.gentoo.org/showdependencytree.cgi?id=129413&hide_resolved=1 > > *Most* of the problems listed there are forced-as-needed problems, > which need to be fixed no doubt, but should NOT block addition of > --as-needed to LDFLAGS in make.defaults which will not trigger those > build failures. > > What needs to be done now is for someone with lots of CPU power to > grab the list of packages[1], and build them one-by-one (all > versions), adding to a new list all the ebuilds that fail. How to > test: > > LDFLAGS="-Wl,--as-needed" emerge -v1 $atom > > Once we have the list that fails with normal as-needed, we can fix > them, get the fix upstreamed (if possible), and switch the flag on. > This action should probably be accompanied by a news item informing > users about the change, and encouraging them to report the (rare) bug > which might hit them. > > Let's try to make Gentoo less frustrating for our users. > > 1. http://dev.gentoo.org/~nirbheek/files/as-needed-failures.list
Thanks for taking care

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