(switched a separate cloned bug, #479711. I think we can leave debian-devel at this point, interested people can subscribe to the bug.)
On Wed, May 07, 2008 at 09:27:28AM +0200, Raphael Hertzog wrote: > We already had this issue with the perl 5.6 -> 5.8 move, see > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=158835 > > So I'll add the pre-dependency back but we might want to investigate > the work-around mentionned in the bug above to avoid other > similar bugs with debconf usage... (thus CCing debconf maintainers). Great, now I understand the problem better. I suppose it could be considered a feature since there's a way to turn it off from the Perl side. The dlopen(3) call is done with RTLD_LAZY by default, postponing all symbol resolution for later. Afterwards, there's no way for the linker to signal a symbol resolving failure short of killing off the process. Using PERL_DL_NONLAZY=1, as it sets the RTLD_NOW flag instead and dlopen() fails with an error that can be caught with the eval statement. The claim in #158835 that this changed between 5.6 and 5.8 seems to be wrong. The only room for improvement that I can see here is to always set PERL_DL_NONLAZY=1 when executing an eval statement. This sounds a bit intrusive, but arguably anybody using an eval wants to catch any exceptions immediately. I'll bring this up on p5p; if the idea is rejected outright, I think at least Dpkg::Gettext and Debconf::Gettext should use the PERL_DL_NONLAZY=1 trick so we don't hit this in future transitions. This one can only be solved with pre-dependencies anyway, as we can't do anything about the Etch perl. Some more documentation is in order any way, of course. I'll try to come up with a patch. # perl -e 'local $ENV{PERL_DL_NONLAZY}=0; eval "require Locale::gettext"; print "got: $@" if $@; exit 0'; echo $? perl: symbol lookup error: /usr/lib/perl5/auto/Locale/gettext/gettext.so: undefined symbol: Perl_Istack_sp_ptr 127 # perl -e 'local $ENV{PERL_DL_NONLAZY}=1; eval "require Locale::gettext"; print "got: $@" if $@; exit 0'; echo $? got: Can't load '/usr/lib/perl5/auto/Locale/gettext/gettext.so' for module Locale::gettext: /usr/lib/perl5/auto/Locale/gettext/gettext.so: undefined symbol: Perl_Imarkstack_ptr_ptr at /usr/lib/perl/5.8/DynaLoader.pm line 225. at (eval 1) line 3 Compilation failed in require at (eval 1) line 3. 0 -- Niko Tyni [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
