Dear Maintainer,

gdcm fails to build against poppler >= 26.02 (26.07.0 should be available
in experimental soon). Two poppler API changes break the build:

* poppler 26.02 changed the PDFDoc stream constructor to take
  std::unique_ptr<BaseStream>. This also breaks the
  LIBPOPPLER_PDFDOC_HAS_OPTIONAL configure probe (it tested the removed
  raw-pointer variant), so gdcminfo.cxx and gdcmpdf.cxx silently fall back
  to even older, long-removed poppler APIs
* poppler 26.04 changed Object::getString() to return const std::string&
  instead of const GooString*

```
Applications/Cxx/gdcminfo.cxx:207:34: error: cannot convert 'const std::string' to 'const GooString*' in initialization
Applications/Cxx/gdcminfo.cxx:517:51: error: no matching function for call to 'PDFDoc::PDFDoc(MemStream*&, GooString*&, GooString*&)'
```

The attached patch re-tests the optional-passwords probe via
PDFDocFactory, adds compile probes for the two new APIs, and adds code
branches for them. Everything follows the existing compile-probe
convention, so the patch is a no-op with the current poppler (26.01) and
is safe to apply now, ahead of the transition.

Thanks,
Nadzeya
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Hello,

Bug #1142648 in gdcm reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below and you can check the diff of the fix at:

https://salsa.debian.org/med-team/gdcm/-/commit/837a376971a2eafae3578e35d72fe03bf0e4ab6f
------------------------------------------------------------------------
Add patch to fix build with poppler 26.07

LP: #2161630
Closes: #1142648
------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/1142648

We believe that the bug you reported is fixed in the latest version of
gdcm, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1142648@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Nadzeya Hutsko <nadzeya@ubuntu.com> (supplier of updated gdcm package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 23 Jul 2026 14:45:34 +0200
Source: gdcm
Built-For-Profiles: derivative.ubuntu noudeb
Architecture: source
Version: 3.0.24-13
Distribution: unstable
Urgency: medium
Maintainer: Debian Med Packaging Team <debian-med-packaging@lists.alioth.debian.org>
Changed-By: Nadzeya Hutsko <nadzeya@ubuntu.com>
Closes: 1142648
Launchpad-Bugs-Fixed: 2161630
Changes:
 gdcm (3.0.24-13) unstable; urgency=medium
 .
   * Add patch to fix build with poppler 26.07 (LP: #2161630) (Closes: #1142648)
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