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Date: Sun, 11 Jul 2010 13:46:53 +0000
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From: "b. f." <bf1783@googlemail.com>
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Cc: Anonymous <swell.k@gmail.com>, Doug Barton <dougb@FreeBSD.org>
Subject: Re: graphics/png does not compile with gcc 4.5.1
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> Anonymous <swell.k at gmail.com> writes:
>
> > Doug Barton <dougb at FreeBSD.org> writes:
> >
> >> readelf -s /lib/libc.so.7 | fgrep __stack_chk_fail
> >>    952: 00028060    26 FUNC    GLOBAL DEFAULT   10 __stack_chk_fail@@FBSD_1.0
> >>   1457: 00028060    26 FUNC    GLOBAL DEFAULT   10 __stack_chk_fail_local at FBSD_1.0
> >
> >>     45: 000ecec0    29 FUNC    LOCAL  HIDDEN    10 __stack_chk_fail_local
> >
> > I don't see such HIDDEN symbol on i386/amd64 snapshots from Jun 30 at
> > allbsd.org. Can you *install* libc.so.7 from there and try again?
>
> Did it help? Based on result from above suggestion either my guesses
> were incorrect[1] or you have messed up environment/make.conf[2].
> To debug the latter you'd have to bisect your own build configuration.
>
> [1] the problem is reproducable on libc from snapshot
> [2] ... *not* reproducable ...
>
> >
> >>   1542: 00028060    26 FUNC    GLOBAL DEFAULT   10 __stack_chk_fail
> >>   2047: 00028060    26 FUNC    GLOBAL DEFAULT   10 __stack_chk_fail_local at FB


I have not attempted to reproduce this particular problem, but some of
these symbols in the base system libraries appear similar to others I
have seen when parts of the base system are built while remapping the
base system compiler libraries to their counterparts in lang/gcc4*
ports via libmap.conf(5), as recommended in, for example,

http://www.freebsd.org/doc/en_US.ISO8859-1/articles/custom-gcc/configuring-ports-gcc.html

Despite claims of 100% backwards-compatibility for these libraries,
this remapping will have some consequences, so you may want to check
if you have disabled the remapping while building/installing the base
system, which I would recommend.  And to be on the safe side, I would
do this by editing or temporarily moving libmap.conf, rather than by
setting LD_LIBMAP_DISABLE in the build/installation environment, to
avoid potential problems with sgid/suid binaries.

Also, when updating or reinstalling ports, I would first deinstall the
old versions (including old versions of the shared libraries that may
be in *compat*) before rebuilding the new versions, to avoid any
linking problems. (We are still eagerly awaiting this or an equivalent
sandbox "safe rebuild" option in ports-mgmt/portmaster.  ;) )

Regards,
                 b.