with the recent ABI change, it was non-obvious, which "ABI" part
changed, so I would like to propose to provide a little bit more of
information, where the ABI is changing.

Please consider shipping one file together with the .ali files, e.g.
ali-checksums.xz, which lists per line
<name of ali file>  <xor'ed checksums from that file>

and then calculate the gnat checksum from that file.  That way, it's
easier to get a hint on what maybe is causing an ABI change for the gnat
checksum.

Hello.

I once had the same problem and spent a hard time comparing the old
and new .ali files.
The solution was to forget them once they have played their role of
alert, and compare the sources directories with something like 'diff
-urN'.
When we search for an unexpected ALI breakage, the changes are
unexpected, hence usually quite small.

We believe that the bug you reported is fixed in the latest version of
gcc-16, 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 1115882@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Matthias Klose <doko@debian.org> (supplier of updated gcc-16 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: Sat, 24 Oct 2026 12:39:05 +0200
Source: gcc-16
Architecture: source
Version: 16.2.0-4
Distribution: unstable
Urgency: medium
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Changed-By: Matthias Klose <doko@debian.org>
Closes: 1108322 1115882 1136069
Changes:
 gcc-16 (16.2.0-4) unstable; urgency=medium
 .
   * Update to git 20261024 from the gcc-16 branch.
     - Fix PR ada/120106, PR target/127843 (PA), PR target/128105 (x86),
       PR target/127692 (S390), PR target/127851 (x86),
       PR tree-optimization/127357, PR tree-optimization/127916,
       PR tree-optimization/126462, PR target/127393 (AArch64),
       PR target/127393 (AArch64), PR tree-optimization/127382,
       PR target/125060 (PPC),  PR target/127553 (RISCV),
       PR tree-optimization/127687, PR middle-end/127517, PR middle-end/127492,
       PR target/127498 (x86), PR middle-end/127378, PR target/127352 (x86),
       PR middle-end/127336, PR tree-optimization/127149, PR target/127482 (AVR),
       PR middle-end/127474, PR target/127650 (x86), PR target/126096 (AArch64),
       PR tree-optimization/127579, PR target/107549 (xtensa),
       PR target/126629 (AArch64), PR tree-optimization/127571,
       PR rtl-optimization/127367, PR target/127500 (x86),
       PR target/127461 (x86), PR ada/128044, PR ada/127994, PR ada/127974,
       PR ada/127994, PR ada/127880, PR ada/127759, PR ada/126448, PR ada/126125,
       PR ada/127756, PR c/127383, PR c++/127232, PR c++/126794, PR c++/127749,
       PR c++/126680, PR c++/125536, PR c++/127493, PR c++/127276,
       PR c++/127109, PR c++/126922, PR c++/122774, PR c++/127707,
       PR c++/127672, PR c++/126654, PR c++/127643, PR fortran/110421,
       PR fortran/127683, PR fortran/127187, PR fortran/125324,
       PR preprocessor/121508, PR preprocessor/123339, PR fortran/127845,
       PR fortran/127846, PR other/116547, PR libstdc++/127757,
       PR libstdc++/115955, PR libstdc++/124370, PR libstdc++/125785,
       PR libstdc++/127666, PR libstdc++/126364, PR libstdc++/114400,
       PR libstdc++/127656, PR libstdc++/123409, PR libstdc++/126786.
 .
   [ Matthias Klose ]
   * Update libstdc++ (all archs) and libgcc (armhf, arm64) symbols files.
 .
   [ Nicolas Boulenguez ]
   * Ada: fix GNATMAKE_FOR_BUILD in ada-gnat-name.diff. Closes: #1136069.
     Build gnat with gnat-16 again.
     Refresh and apply ada-gcc-name.diff.
     Report a source diff when the alihash changes. Closes: #1115882.
     Refresh the PR ada/114065 time_t64 patches. Closes: #1108322.
   * Compute the libgnat alihash with crc32 instead of xor.
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Files:
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