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Re: Failure to link with libtdl

From: Gary V. Vaughan
Subject: Re: Failure to link with libtdl
Date: Sun, 27 Apr 2008 18:37:19 -0400

Hi Bob,

On 26 Apr 2008, at 11:05, Bob Friesenhahn wrote:
On Sat, 26 Apr 2008, Ralf Wildenhues wrote:
Hi Bob,

* Bob Friesenhahn wrote on Fri, Apr 25, 2008 at 03:10:41AM CEST:
A GraphicsMagick 1.2 user reported a failure to link due to libltdl.
This is an on Intel Mac OS-X system.  Ideas?

Undefined symbols:
  "_lt__argz_create_sep", referenced from:
      _argzize_path in ltdl_libltdlc_la-ltdl.o

The "no name list" looks fishy. Can you try to link without -- silent, and if that doesn't give further clues, with --debug added? Also please
try omitting
-export-symbols-regex ".*"

This GraphicsMagick user is not remote controlled by me.

I advised him to add the --with-included-ltdl option and then it worked. This caused me to suspect that our tests for a suitable already installed libltdl may be faulty.

The log you sent indicates that ImageMagick built and linked the included libltdlc.la, which in turn was missing argz.o which would have satisfied the symbols that were flagged unresolved.

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