Re: findnode() results in Invalid Expression only on non-self-compiled perl

Wed, 09 Jan 2008 06:50:21 -0800 

RedHat :)
So the problem here typically is that SOME Perl distribution maintainers like to apply the occasional non-standard bleadperl patches to their release, and then version it the same as the regular one. 


This results in bugs (I had to update 9 CPAN modules the week after I 
first got access to a RHEL 4 Update 1 machine).



I know for a fact there's still some bizarre thread bugs hidden in some 
versions of RedHat Enterprise Linux 4 that cause Test::More to fail its 
tests.



At my company we've just plain given up on RHEL 4 and we're moving to 5 
to try to avoid them.



If you are having troubles with a vendor-screwed-up Perl version, my 
main recommendation would be to build your /opt/perl and use that for 
your application.



Alternatively, if you have formal support contracts with those vendors 
PLEASE file formal bug reports. It's one of the few weapons we have to 
push them to not pull this crap.


Adam K

Harald Häntsch (Cenix Bioscience GmbH) wrote:

Hello,


I'm a bit new to perl, but I think I'm experiencing a very strange 
behavior in perl.
findnodes() gives me an Invalid expression only on perl which comes with 
the distribution on SuSE 10.3, RHEL4 and RHEL 5.1.



But if I compile the entire perl by myself it doesnt occur and works 
just find.

I tried with different versions of perl and XML-Lib but no difference.

Here is the code:

#!/usr/bin/perl -w
use strict;
use XML::LibXML;
use Getopt::Std;
use vars qw/$opt_x/;

{ # main

my $parser = XML::LibXML->new();
my $usercfg = $parser->parse_file('./user.cfg');
my $mailcfg = $parser->parse_file('./server.cfg');
my $uroot   = $usercfg->documentElement;
my $mroot   = $mailcfg->documentElement;

my @unodes      = $uroot->findnodes('./');
my @mnodes      = $mroot->findnodes('./');


The different config show this:
/usr/bin/perl -V (Distribution:

Summary of my perl5 (revision 5 version 8 subversion 5) configuration:
 Platform:

   osname=linux, osvers=2.6.9-55.0.9.elsmp, 
archname=i386-linux-thread-multi
   uname='linux hs20-bc1-5.build.redhat.com 2.6.9-55.0.9.elsmp #1 smp 
tue sep 25 02:16:15 edt 2007 i686 i686 i386 gnulinux '
   config_args='-des -Doptimize=-O2 -g -pipe -m32 -march=i386 
-mtune=pentium4 -Dversion=5.8.5 -Dmyhostname=localhost 
[EMAIL PROTECTED] -Dcc=gcc -Dcf_by=Red Hat, Inc. 
-Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux 
-Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib -Dusethreads 
-Duseithreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db 
-Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio 
-Dinstallusrbinperl -Ubincompat5005 -Uversiononly -Dpager=/usr/bin/less 
-isr -Dinc_version_list=5.8.4 5.8.3 5.8.2 5.8.1 5.8.0'

   hint=recommended, useposix=true, d_sigaction=define

   usethreads=define use5005threads=undef useithreads=define 
usemultiplicity=define

   useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
   use64bitint=undef use64bitall=undef uselongdouble=undef
   usemymalloc=n, bincompat5005=undef
 Compiler:

   cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING 
-fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE 
-D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',

   optimize='-O2 -g -pipe -m32 -march=i386 -mtune=pentium4',

   cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING -fno-strict-aliasing 
-pipe -I/usr/local/include -I/usr/include/gdbm'
   ccversion='', gccversion='3.4.6 20060404 (Red Hat 3.4.6-8)', 
gccosandvers=''

   intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
   d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12

   ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', 
lseeksize=8

   alignbytes=4, prototype=define
 Linker and Libraries:
   ld='gcc', ldflags =' -L/usr/local/lib'
   libpth=/usr/local/lib /lib /usr/lib
   libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
   perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
   libc=/lib/libc-2.3.4.so, so=so, useshrplib=true, libperl=libperl.so
   gnulibc_version='2.3.4'
 Dynamic Linking:

   dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E 
-Wl,-rpath,/usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE'

   cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl):

 Compile-time options: DEBUGGING MULTIPLICITY USE_ITHREADS 
USE_LARGE_FILES PERL_IMPLICIT_CONTEXT

 Built under linux
 Compiled at Oct 22 2007 16:12:50


/usr/local/bin/perl -V (self compiled)
Summary of my perl5 (revision 5 version 8 subversion 7) configuration:
 Platform:
   osname=linux, osvers=2.6.9-42.0.3.elsmp, archname=i686-linux

   uname='linux pony.cenix-bioscience.com 2.6.9-42.0.3.elsmp #1 smp mon 
sep 25 17:28:02 edt 2006 i686 athlon i386 gnulinux '

   config_args=''
   hint=recommended, useposix=true, d_sigaction=define

   usethreads=undef use5005threads=undef useithreads=undef 
usemultiplicity=undef

   useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
   use64bitint=undef use64bitall=undef uselongdouble=undef
   usemymalloc=n, bincompat5005=undef
 Compiler:

   cc='cc', ccflags ='-fno-strict-aliasing -pipe -I/usr/local/include 
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',

   optimize='-O2',

   cppflags='-fno-strict-aliasing -pipe -I/usr/local/include 
-I/usr/include/gdbm'
   ccversion='', gccversion='3.4.6 20060404 (Red Hat 3.4.6-3)', 
gccosandvers=''

   intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
   d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12

   ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', 
lseeksize=8

   alignbytes=4, prototype=define
 Linker and Libraries:
   ld='cc', ldflags =' -L/usr/local/lib'
   libpth=/usr/local/lib /lib /usr/lib
   libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc
   perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
   libc=/lib/libc-2.3.4.so, so=so, useshrplib=false, libperl=libperl.a
   gnulibc_version='2.3.4'
 Dynamic Linking:
   dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
   cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl):
 Compile-time options: USE_LARGE_FILES
 Built under linux
 Compiled at Oct 11 2006 02:59:09


It would be great if someone could pojnt me in the right direction. I 
would like to use the script on several machines and therefore dont like 
to compile perl everytime.

























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