Double installation of liblzma.so.5 breaks libarchive.so.5

[Michael Hoffmann]

Hi,

May be some of you will be affected by this like me.

Today I upgraded from RELEASE_8_1 to RELEASE_8_2. The box was upgraded over 
the years starting from 6.2, as far as I know.

But now this happened:
> # pkg_create -b xz-5.0.1
> /libexec/ld-elf.so.1: /usr/local/lib/liblzma.so.5: version XZ_5.0 required 
by /usr/lib/libarchive.so.5 not defined
>
> # ldd /usr/lib/libarchive.so.5
> /usr/lib/libarchive.so.5:
>         libz.so.5 => /lib/libz.so.5 (0x281d5000)
>         libmd.so.5 => /lib/libmd.so.5 (0x281e7000)
>         libbz2.so.4 => /usr/lib/libbz2.so.4 (0x28300000)
>         liblzma.so.5 => /usr/local/lib/liblzma.so.5 (0x28311000) <== !!!
>         libcrypto.so.6 => /lib/libcrypto.so.6 (0x28331000)
>         libc.so.7 => /lib/libc.so.7 (0x2808f000)
>         libthr.so.3 => /lib/libthr.so.3 (0x28483000)
>
> # find / -name "liblzma.so.5"
> /usr/lib/liblzma.so.5
> /usr/local/lib/liblzma.so.5
>
> pkg_info -W /usr/local/lib/liblzma.so.5
> /usr/local/lib/liblzma.so.5 was installed by package xz-5.0.1

I think trouble partially comes from preserving an old LD_LIBRARY_PATH entry 
in csh.cshrc:
> # mergemaster
> [...]
> *** Displaying differences between ./etc/csh.cshrc and installed version:
> --- /etc/csh.cshrc      2011-05-05 20:20:26.000000000 +0200
> +++ ./etc/csh.cshrc     2011-05-06 18:23:46.000000000 +0200
> @@ -1,4 +1,3 @@
> -# $FreeBSD: src/etc/csh.cshrc,v 1.3.56.1.4.1 2010/06/14 02:09:06 kensmith 
Exp $
> +# $FreeBSD: src/etc/csh.cshrc,v 1.3.56.1.6.1 2010/12/21 17:09:25 kensmith 
Exp $ # 
>  # System-wide .cshrc file for csh(1).
> -setenv LD_LIBRARY_PATH /usr/local/lib:/usr/local/lib/pth
>
>   Use 'd' to delete the temporary ./etc/csh.cshrc
>   Use 'i' to install the temporary ./etc/csh.cshrc
>   Use 'm' to merge the temporary and installed versions
>   Use 'v' to view the diff results again
> 
>   Default is to leave the temporary file to deal with by hand
> 
> How should I deal with this? [Leave it for later] m
> 
> # $FreeBSD: src/etc/csh.cshrc,v 1.3.5 | # $FreeBSD: src/etc/csh.cshrc,v 
1.3.5
> %2
> setenv LD_LIBRARY_PATH /usr/local/lib <
> %1
> 
>   Use 'i' to install merged file
>   Use 'r' to re-do the merge
>   Use 'v' to view the merged file
>   Default is to leave the temporary file to deal with by hand
> 
>     *** How should I deal with the merged file? [Leave it for later] i

After deinstalling xz-5.0.1 everything works fine again. But probably cleaning 
the environment from LD_LIBRARY_PATH would have done, too. (I thought it to 
be wise to remove it from csh.cshrc. After that I used libchk and pkg_libchk, 
and everything seems fine.)

I cannot reconstruct why 'pkgdb -Fu' did not tried to prevent me from 
using 'archivers/xz' furthermore, allthough it now seems to be marked as 
IGNORE. I also don't know how this LD_LIBRARY thing ever popped up in 
csh.cshrc, but it seems to persist there from at least 7.2. Newer systems 
don't seem to have such an entry.

Kind regards,
Michael Hoffmann