On Thu, 25 Jun 2009 10:10:03 +0100 Martin Evans <martin.ev...@easysoft.com> wrote:
> Martin J. Evans wrote: > > col wrote: [8<] > >> > >> So, I thought you folks should hear about it all again. HTH... > >> else, sorry for the noise. [8<] > > I spoke to Nick and he reminded me why this can happen. Thanks *very* much for that. > See > http://www.easysoft.com/support/kb/kb00664.html > http://groups.google.com/group/perl.dbi.users/browse_thread/thread/995131d999ca388/370b10f358e31729?hl=en&lnk=gst&q=Segmentation+fault+on+RHEL4#370b10f358e31729 And thanks for the links. I had already run across this and attempted to rebuild unixODBC --enable-rtldgroup=no to no apparent effect. I'll try again. > > It is probably down to using RTLD_GLOBAL on the dlopen call which > causes symbols to be resolved top down instead of from where the > symbol was found to be undefined downwards. You can stick with what > you are doing or rebuild unixODBC but it seems a permanent change to > unixODBC is not possible because the problem is in libtool so every > time unixODBC is reconfigured libtool replaces the change to remove > RTLD_GROUP. ./configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --host=i686-pc-linux-gnu --prefix=/usr --sysconfdir=/etc/unixODBC --libdir=/usr/lib --enable-static --enable-rtldgroup=no --enable-fdb --build=i686-pc-linux-gnu ... checking Have we enabled using RTLD_GROUP ... no [...] No change: perl dbix_odbctest.pl Segmentation fault LD_BIND_NOW=1 perl dbix_odbctest.pl trex connected Honestly, I'd already explored this option, or so I thought. This is the script used to make the unixODBC build: http://bugs.gentoo.org/attachment.cgi?id=193101&action=view ... which is possibly deficient in some way. IDK. I just added the rtld_group configure option, which does seem to be honoured when passed to ./configure. I'm lost, pretty much, at this point. I'll bring my findings to the unixODBC folks as well. Thanks for all your help with this! Cheers, -- |\ /| | | ~ ~ | \/ | |---| `|` ? | |ichael | |iggins \^ / michael.higgins[at]evolone[dot]org
