Date: Tue, 21 Feb 2012 18:39:36 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: Konstantin Belousov <kostikbel@gmail.com>, Diane Bruce <db@db.net>, freebsd-current@freebsd.org, Dimitry Andric <dim@freebsd.org>, freebsd-ports@freebsd.org Subject: Re: rtld or lang/gcc cannot find libgcc_s.so.1 Message-ID: <Pine.GSO.4.64.1202211831220.22739@sea.ntplx.net> In-Reply-To: <20120221223251.GA23053@troutmask.apl.washington.edu> References: <20120221182850.GA20768@troutmask.apl.washington.edu> <20120221185754.GL55074@deviant.kiev.zoral.com.ua> <20120221194259.GA21185@troutmask.apl.washington.edu> <4F440E8B.9020306@FreeBSD.org> <20120221220053.GA44386@night.db.net> <20120221223251.GA23053@troutmask.apl.washington.edu>
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On Tue, 21 Feb 2012, Steve Kargl wrote:
> On Tue, Feb 21, 2012 at 05:00:53PM -0500, Diane Bruce wrote:
>> On Tue, Feb 21, 2012 at 10:37:15PM +0100, Dimitry Andric wrote:
>>> On 2012-02-21 20:42, Steve Kargl wrote:
>>> ...
>>>> Yes, /lib comes before /usr/local/lib/gcc46. I suppose
>>>> that this is a heads up for gerald@. lang/gcc is used by
>>>> the ports collections to build a large number of other
>>>> ports, so others are likely to hit this issue.
>>
>> Does -rpath not help ?
>
> I already mentioned that I can add '-rpath /usr/local/lib/gcc46'
> to my various projects. I can also build with -static to avoid
> rtld. One can also use LD_LIBRARY_PATH.
>
> The issue seems to be that lang/gcc will be installed after
> system start, and 'ldconfig -m' appends new shared libraries
> to the hints file. This means that libraries with the same
> name but different locations will be found via the order of the
> search path in the hints file, and one gets the wrong library.
> That is, with the following
>
> troutmask:root[256] ldconfig -r | grep libgcc_s
> 29:-lgcc_s.1 => /lib/libgcc_s.so.1
> 723:-lgcc_s.1 => /usr/local/lib/gcc46/libgcc_s.so.1
>
> 29 will be found before 723. While I can work around the
> issue, lang/gcc is used by a rather large boatload of ports
> during the building process and I suspect that a large
> number of FreeBSD users use lang/gcc for their everyday
> compiler. The question is how do we, the FreeBSD project,
> deal with this issue, so that the general user base does not
> get hit with it.
>
> There are a few solutions:
> 1) Set ldconfig_paths in /etc/rc.conf to cause ${PORTSDIR}/lib to
> be scanned before /lib and /usr/lib.
> 2) Use /etc/ld.so.conf to cause ${PORTSDIR}/lib to be scanned
> for /lib and /usr/lib.
s/for/before/ ??
> 3) Add a new option to ldconfig to prepend new libraries to
> the hints files and fix the ports to use this option instead
> of -m.
You don't want system binaries that want /lib/libgcc_s.so.1
to use /usr/local/lib/gccXX/libgcc_s.so.1, though. Wouldn't
your option 3 do that?
> 4) Suggestions from people that are brighter than I.
[Not brighter than you, but]
o For our system libgcc, use libcc_s.so.1 (or some other
name) instead of libgcc_s.so.1?
o Change affected ports to use -rpath when building?
--
DE
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