Re: libltdl and dlopen global/local

[Gary V. Vaughan]

Hi Brian, Jeff, Ralf et al,

On 11 May 2007, at 18:11, Brian Barrett wrote:

On May 8, 2007, at 1:17 PM, Ralf Wildenhues wrote:

Now that Gary has added interfaces to libltdl to control dlopen symbol

locality:

<http://thread.gmane.org/gmane.comp.gnu.libtool.patches/7442/focus=7527>

would it be possible that you test this new functionality and check

whether it works for you?

I finally got a chance to give it a shot, and am running into problems.  I'm a cvs checkout from yesterday.

It looks like the problem with lt_dlopenext() -- we always call it with an absolute path to a dso, minus the extension.  Before the patches from Gary, this worked.  Now lt_dlopenext() always returns an error in that case, and the error returned from libtool is "file not found".  I unfortunately don't have time in the next week to investigate further.  System details:

      host-triplet:     x86_64-unknown-linux-gnu

      shell:            /bin/sh

      compiler:         gcc

      compiler flags:           -g -Wall -Wundef -Wno-long-long -Wsign-compare -Wmissing-prototypes -Wstrict-prototypes -Wcomment -pedantic -Werror-implicit-function-declaration -finline-functions -fno-strict-aliasing -pthread

      linker:           /usr/bin/ld -m elf_x86_64 (gnu? yes)

      libtool:          (GNU libtool 1.2460 2007/05/10 17:30:29) 2.1a

      automake:         automake (GNU automake) 1.10

      autoconf:         autoconf (GNU Autoconf) 2.61

Argh.  I hadn't realised that this bug was introduced by my previous patch :-(  I did spend a little time chasing that very thing around, and believe I've fixed it with my pending patch 330.  When you have time to look at it again, please wait until that patch has passed review and been installed, and see if that fixes the problem for you.

I'd love to add a regression test to libtool -- if you could cobble together a small C program that fails reliably for you as a starting point for me to make that test, it would help me to nail the problem for good :-)

Cheers,

Gary

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