Re: [gentoo-amd64] Re: [gentoo-user] chromium failed to start up

[Xi Shen <davidshen84@googlemail.com>]

On Sat, Dec 26, 2009 at 12:55 PM, Duncan <1i5t5.duncan@cox.net> wrote:
> Xi Shen posted on Sat, 26 Dec 2009 12:31:24 +0800 as excerpted:
>
>> my system is gentoo amd64, kde 4.3, and have recently updated. last time
>> i emerged chromium and it works fine. but after updated the world, my
>> chromium cannot start up. it reports segment fault.
>
> Did you do a revdep-rebuild after the last update?  Chances are, one of
> chromium's dependencies was updated, changing its abi, and chromium (and
> perhaps other packages) that depend on it need rebuilt to match the new
> abi.
>
> It's revdep-rebuild that takes care of this, but if you don't run it
> routinely, you'll likely have a BUNCH of stuff to rebuild.  FWIW,
> lafilefixer (with the --justfixit option) can reduce that bunch of stuff
> by fixing *.la files that point to other *.la files, to point to the
> libraries directly instead.
>
> Also, you may wish to read up on LDFLAGS="-Wl,--as-needed" and consider
> using it too, as it helps kill indirect dependencies. (Say application X
> uses library Y, which depends on library Z, but application X doesn't use
> any of library Z's functionality directly, so it shouldn't need to
> directly depend on it, and shouldn't need to be rebuilt when only library
> Z changes.  Only library Y would need rebuilt.  The as-needed LDFLAGS
> help this happen, thus reducing substantially the number of rebuilds
> needed, but at a cost of occasionally causing a legit depend to be
> missed.  But flameeyes has been working on this as one of his projects,
> so it doesn't happen very often with at least mainline packages any more,
> tho it might in obscure corner cases, the reason it's not yet the
> default.  So... consider it carefully as there's a major upside and
> generally only obscure case downside, but do be aware of the issues if
> you decide to use it.)
>
> Of course, the LDFLAGS as-needed won't help much until you've recompiled
> a good part of your system at least once with it in place.  But the
> lafilefixer thing is just about perfect -- very little downside, it
> doesn't take long to run compared to even a couple package rebuilds, and
> it can be put to use immediately after you merge it! =:^)
>
> Together, these reduce the number of revdep-rebuilds SUBSTANTIALLY, and I
> run it after every update session.  (Actually, my revdep-rebuild invoking
> script automatically runs lafilefixer --justfixit before it runs revdep-
> rebuild, just to be sure, so I only invoke that script after the update
> and it takes care of both.)
>
> --
> Duncan - List replies preferred.   No HTML msgs.
> "Every nonfree program has a lord, a master --
> and if you use the program, he is your master."  Richard Stallman
>
>
>


yes, i have run the revdep-rebuild immediately after update the world.
i think you are correct. since chromium is not a main stream package,
indirect library dependence may cause this kind of problem.

thanks a lot.


-- 
Best Regards,
David Shen

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