Dear maintainer,

arb FTBFS on ppc64el with below error:

../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'typename Eigen::ei_packet_traits<T>::type
Eigen::ei_pset1(const Scalar&) [with Scalar = float; typename
ei_packet_traits<T>::type = __vector(4) float]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:194:40:
error: declaration does not declare anything [-fpermissive]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:194:3:
error: expected primary-expression before 'float'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:195:3:
error: 'af' was not declared in this scope
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:196:18:
error: invalid parameter combination for AltiVec intrinsic
'__builtin_vec_ld'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'typename Eigen::ei_packet_traits<T>::type
Eigen::ei_pset1(const Scalar&) [with Scalar = int; typename
ei_packet_traits<T>::type = __vector(4) int]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:203:38:
error: declaration does not declare anything [-fpermissive]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:203:3:
error: expected primary-expression before 'int'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:204:3:
error: 'ai' was not declared in this scope
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:205:18:
error: invalid parameter combination for AltiVec intrinsic
'__builtin_vec_ld'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'void Eigen::ei_pstoreu(Scalar*, const Packet&) [with Scalar =
float; Packet = __vector(4) float]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:222:23:
warning: 'vec_lvsl' is deprecated for little endian; use assignment for
unaligned loads and stores [-Wdeprecated]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:224:19:
warning: 'vec_lvsr' is deprecated for little endian; use assignment for
unaligned loads and stores [-Wdeprecated]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'void Eigen::ei_pstoreu(Scalar*, const Packet&) [with Scalar =
int; Packet = __vector(4) int]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:240:23:
warning: 'vec_lvsl' is deprecated for little endian; use assignment for
unaligned loads and stores [-Wdeprecated]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:242:19:
warning: 'vec_lvsr' is deprecated for little endian; use assignment for
unaligned loads and stores [-Wdeprecated]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'typename Eigen::ei_unpacket_traits<T>::type
Eigen::ei_pfirst(const Packet&) [with Packet = __vector(4) float;
typename ei_unpacket_traits<T>::type = float]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:251:40:
error: declaration does not declare anything [-fpermissive]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:251:3:
error: expected primary-expression before 'float'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:252:16:
error: 'af' was not declared in this scope; did you mean 'a'?
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h: In
function 'typename Eigen::ei_unpacket_traits<T>::type
Eigen::ei_pfirst(const Packet&) [with Packet = __vector(4) int; typename
ei_unpacket_traits<T>::type = int]':
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:258:38:
error: declaration does not declare anything [-fpermissive]
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:258:3:
error: expected primary-expression before 'int'
../HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h:259:16:
error: 'ai' was not declared in this scope; did you mean 'a'?
In file included from ../HEADERLIBS/eigen/Eigen/Array:28,
                  from ../HEADERLIBS/eigen/Eigen/Dense:2:



You can refer
https://buildd.debian.org/status/fetch.php?pkg=arb&arch=ppc64el&ver=6.0.6-8&stamp=1744759359&raw=0
for full build log on ppc64el.


Thanks,
Trupti

Hello,

The ARB package FTBFS on ppc64el with GCC 14+ due to errors in the
Altivec code from the bundled Eigen (eigen-2.0.16).
The errors occur in
HEADERLIBS/eigen/Eigen/src/Core/arch/AltiVec/PacketMath.h. These
intrinsics are deprecated on little-endian PowerPC and now rejected by
modern GCC.


Upstream Eigen replaced these deprecated intrinsics with endian-agnostic
equivalents starting around version 3.3.9
Below is the commit of that change.
https://gitlab.com/libeigen/eigen/-/commit/1615a2799384a2964d01ba77fe98e3f6fcc412f4

ARB currently bundles an older Eigen (eigen-2.0.16) which predates those
fixes.


Thanks,
Trupti.

Hi,

I tested the build failure on ppc64el and confirmed it is caused by the
outdated Eigen version(2.0.16) bundled in ARB.

Replacing the bundled Eigen with Eigen 3.4.0 resolves the issue.The
updated version already includes endian-safe Altivec intrinsics that
compile correctly on ppc64el.

I tested a fix by updating the bundled Eigen to version 3.4.0 and
adjusting one source file (`RNACMA/Cma.cxx`) for Eigen3 API
compatibility. The package now resolves the issue of Altivec code on
ppc64el.

A proposed patch is attached for review.

Changes summary:
   • Update HEADERLIBS/Makefile to unpack Eigen 3.4.0.
   • Add HEADERLIBS/eigen to CC_INCLUDES in Makefile.
   • Update RNACMA/Cma.cxx to match Eigen 3 API.


Please review and consider applying this patch.






Note :
After resolving this issue also arb pacakge is FTBFS on ppc64el with
different errors. Which will be taken care by  bug number (#1114476).

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1114476 bug report.


Thanks,
Trupti.

Hello,

Did you get a chance to look into this fix ?

Hello,

Bug #1120614 in arb 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/arb/-/commit/d657a1b0b596db4d45bd1ba8a449b0276381d321

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/1120614

We believe that the bug you reported is fixed in the latest version of
arb, 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 1120614@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Andreas Tille <tille@debian.org> (supplier of updated arb 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: Fri, 23 Oct 2026 11:56:22 +0200
Source: arb
Binary: arb arb-common arb-dbgsym arb-doc libarb libarb-dbgsym libarb-dev
Architecture: source all amd64
Version: 7.0+ds-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Med Packaging Team <debian-med-packaging@lists.alioth.debian.org>
Changed-By: Andreas Tille <tille@debian.org>
Description:
 arb        - phylogenetic sequence analysis suite - main program
 arb-common - phylogenetic sequence analysis suite - common files
 arb-doc    - phylogenetic sequence analysis suite - documentation
 libarb     - phylogenetic sequence analysis suite - libraries
 libarb-dev - phylogenetic sequence analysis suite - development files
Closes: 1089541 1100471 1102185 1102816 1114476 1120614 1137377
Changes:
 arb (7.0+ds-1) unstable; urgency=medium
 .
   [ Charles Plessy ]
   * Add perl-xs-dev to Build-Depends. Closes: #1102816
   * Standards-Version: 4.7.4 (routine-update)
   * debhelper-compat 13 (routine-update)
   * Reflow Uploaders field (cme)
   * Remove Priority field (cme)
   * Drop 'Rules-Requires-Root: no' from d/control (routine-update)
   * Reorder Files paragraphs in debian/copyright by directory depth.
   * Run debconf-updatepo after template changes.
 .
   [ Andreas Tille ]
   * New upstream version
     Closes: #1114476, #1089541
   * d/watch: version=5
   * Reformat the Last-Update date as ISO YYYY-MM-DD.
   * debputy lint --auto-fix (routine-update)
   * Adapt patches to the new upstream version:
     - Drop 10, 20, 30 and 40, which were applied upstream.
     - Refresh the remaining patches for the new source layout.
     - Add 120 to disable GCC 16 vectorization checks.
     - Add 130 to build bundled RAxML/SATIVA sources as C17.
     - Add 140 to strip the C standard from the 'nostd' compatibility build.
   * Add libboost-dev and libxerces-c-dev to Build-Depends.
   * d/rules: build C sources as C17 and use dh_missing for compat 14.
   * Build RNACMA against system libeigen3 instead of bundled Eigen
     Closes: #1120614
   * Remove code copy of eigen from upstream source
   * Remove unused lintian-overrides
   * Make sure all files are installed and drop list-missing
 .
   [ Camaleón ]
   * Update Spanish debconf translation
     Closes: #1100471
 .
   [ Carles Pina i Estany ]
   * Update/add debconf template translation [INTL:ca]
     Closes: #1102185
 .
   [ Remus-Gabriel Chelu ]
   * Romanian translation of arb debconf template
     Closes: #1137377
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