[FUG-BR] Problemas para atualizar o libxml2

["Fábio Jr."]

Olá caros colegas.

Estou tendo problemas para atualizar o libxml2 em um dos meus 
servidores. Após executar um /portsnap fetch update/, entrar no 
diretório do libxml2 e rodar um /portupgrade/, a saída do comando vem 
bem até o seguinte ponto:

Enabled Schemas/Relax-NG support
./configure.lineno: 14590: Syntax error: Bad substitution
===>  Script "configure" failed unexpectedly.
Please run the gnomelogalyzer, available from
"http://www.freebsd.org/gnome/gnomelogalyzer.sh", which will diagnose the
problem and suggest a solution. If - and only if - the gnomelogalyzer cannot
solve the problem, report the build failure to the FreeBSD GNOME team at
gnome em FreeBSD.org, and attach (a)
"/usr/ports/textproc/libxml2/work/libxml2-2.7.8/config.log", (b) the output
of the failed make command, and (c) the gnomelogalyzer output. Also, it 
might
be a good idea to provide an overview of all packages installed on your 
system
(i.e. an `ls /var/db/pkg`). Put your attachment up on any website,
copy-and-paste into http://freebsd-gnome.pastebin.com, or use send-pr(1) 
with
the attachment. Try to avoid sending any attachments to the mailing list
(gnome em FreeBSD.org), because attachments sent to FreeBSD mailing lists are
usually discarded by the mailing list software.
*** Error code 1

Stop in /usr/ports/textproc/libxml2.
** Command failed [exit code 1]: /usr/bin/script -qa 
/tmp/portupgrade20111220-21960-1lkf5l8-0 env UPGRADE_TOOL=portupgrade 
UPGRADE_PORT=libxml2-2.7.7 UPGRADE_PORT_VER=2.7.7 make
** Fix the problem and try again.
** Listing the failed packages (*:skipped / !:failed)
     ! textproc/libxml2 (libxml2-2.7.7)    (unknown build error)
--->  Packages processed: 0 done, 0 ignored, 0 skipped and 1 failed

Rodando o gnomelogalyzer, tenho o seguinte retorno:

Generating build log. Please wait... done.

The cause of your build failure is not known to gnomelogalyzer.sh.  Before
e-mailing the build log to the FreeBSD GNOME team at 
freebsd-gnome em FreeBSD.org,
TRY EACH OF THE FOLLOWING:

   * If you are generating your own logfile, make sure to generate it with
     something similar to:
       "make 2>&1 | tee /path/to/logfile" (sh/bash/ksh/zsh) or
       "make |& tee /path/to/logfile" (csh/tcsh)
     * Make sure your cvsup(1) configuration file specifies the 'ports-all'
       collection
     * Run cvsup(1) and attempt the build again
     * Check /usr/ports/UPDATING for information pertinent to your build
       failure
     * 99% of the commonly reported build failures can be solved by
       running "portupgrade -a"
     * Read the FAQs at http://www.FreeBSD.org/gnome/
     * Search the archives of freebsd-gnome em FreeBSD.org.  Archives can be
       searched at http://www.freebsd.org/gnome/index.html#search

If you have not performed each of the above suggestions, don't bother asking
for help.  The chances are good that you'll simply be told to perform one of
the aforementioned steps.

Que basicamente não me da nenhuma pista do q eu poderia fazer. (ou dá, e 
eu não captei a mensagem)

Meu servidor esta com o FreeBSD 6.2, e a versão do libxml2 que estou 
tentando atualizar é a 2.7.7

O que poderia fazer para contornar, ou pelo menos descobrir o problema?

Obrigado.