Hi,

tar fails to build from source in unstable, because some of its
functions clash with the function namespace of acl and the latter
recently added new symbols. tar needs to rename its own and indeed did
so upstream already.

https://lists.nongnu.org/archive/html/acl-devel/2026-06/msg00000.html
https://lists.nongnu.org/archive/html/bug-tar/2026-06/msg00013.html

Please upload a new upstream version or cherry-pick the patch.

Helmut

Helmut Grohne <helmut@subdivi.de> writes:

Hi

I took the upstream git commit that fixes the FTBFS, made it apply to
what Debian ships, and uploaded 1.35+dfsg-5 into DELAYED/7.

Salsa pipeline confirming FTBFS with 1.35+dfsg-4:

https://salsa.debian.org/jas/tar/-/pipelines/1140780

Salsa pipeline for 1.35+dfsg-5:

https://salsa.debian.org/jas/tar/-/pipelines/1140782

Salsa merge request here:

https://salsa.debian.org/debian/tar/-/merge_requests/9

If I should cancel the DELAYED upload, or make an immediate upload
sooner, please let me know.

If the upload hits the archive, I plan to push the commit to the Salsa
tar repository (hoping Salsa git hasn't been modified meanwhile).

I volunteer to make other improvements to the packaging of 'tar' too, if
you need help with this.  There is a number of lintian complaints, that
appear valid, which ought to be fixed.

/Simon

PS.  I wonder how 'acl' 2.4.0-1 made it into testing, shouldn't
debci/autopkg testing migration have caught this FTBFS problem in
reverse build dependency testing?

We believe that the bug you reported is fixed in the latest version of
tar, 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 1141146@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Simon Josefsson <simon@josefsson.org> (supplier of updated tar 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, 01 Aug 2026 14:00:00 +0200
Source: tar
Architecture: source
Version: 1.35+dfsg-5
Distribution: unstable
Urgency: medium
Maintainer: Janos Lenart <ocsi@debian.org>
Changed-By: Simon Josefsson <simon@josefsson.org>
Closes: 1141146
Changes:
 tar (1.35+dfsg-5) unstable; urgency=medium
 .
   * Team upload (salsa.debian.org/debian namespace)
   * Add libacl FTBFS fix from bug-tar mailing list (Closes: #1141146)
   * Slight tweak of upstream patch to apply cleanly to 1.35
Checksums-Sha1:
 91e92a30fd75247ff0157357ffb679b92f09eac6 2428 tar_1.35+dfsg-5.dsc
 31b0ce16b76da17cf7c1a6440138ea74a7d2f7d3 22704 tar_1.35+dfsg-5.debian.tar.xz
 a41015164511e437dcbcc08d6c525f9e108d43c0 6785 tar_1.35+dfsg-5_amd64.buildinfo
Checksums-Sha256:
 e026e7a19c295212fcc3250e3136b134ae09661c559bf707b8ebfdd8f5093c0a 2428 tar_1.35+dfsg-5.dsc
 51fecfaa10cbadb1ab19be88adfd34a6d876619c50aaaafd69011ddb2e283b70 22704 tar_1.35+dfsg-5.debian.tar.xz
 c6e7af3f8106d6d5ccc10df3c0fca1571ea8cb5c57fe6d73ef7bd81c0442d0ab 6785 tar_1.35+dfsg-5_amd64.buildinfo
Files:
 ef4c27d074643f2cae835344994f5f91 2428 utils required tar_1.35+dfsg-5.dsc
 0c29464dbc20f352de9c3e7dde61dd79 22704 utils required tar_1.35+dfsg-5.debian.tar.xz
 e16d7a1806a7de13a225d83c7d371014 6785 utils required tar_1.35+dfsg-5_amd64.buildinfo
-----BEGIN PGP SIGNATURE-----
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=OPmX
-----END PGP SIGNATURE-----