Hi,

on ppc64, the m2 backend is currently disabled for gcc-16. I have just
verified that gcc-16 builds fine with m2 enabled:

glaubitz@perotto:~/gcc16$ ls -l *m2*
-rw-r--r-- 1 glaubitz glaubitz   106928 Jul  6 01:21 gm2-16_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz     1084 Jul  6 01:21 gm2-16-for-host_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz 12921728 Jul  6 01:31 gm2-16-powerpc64-linux-gnu_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz 94905708 Jul  6 01:23 gm2-16-powerpc64-linux-gnu-dbgsym_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz   845456 Jul  6 01:21 libgm2-16-dev_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz   187928 Jul  6 01:22 libgm2-21_16.1.0-2_ppc64.deb
-rw-r--r-- 1 glaubitz glaubitz   515564 Jul  6 01:21 libgm2-21-dbgsym_16.1.0-2_ppc64.deb
glaubitz@perotto:~/gcc16$

Thus, please remove "ppc64" from m2_no_cpus for the next upload!

I'm going to test powerpc next.

Adrian

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 1141560@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: Sun, 19 Jul 2026 13:28:39 +0200
Source: gcc-16
Architecture: source
Version: 16.1.0-3
Distribution: unstable
Urgency: high
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Changed-By: Matthias Klose <doko@debian.org>
Closes: 1141560 1141596
Changes:
 gcc-16 (16.1.0-3) unstable; urgency=high
 .
   * Update to git 20260719 from the gcc-16 branch.
     - Fix PR tree-optimization/126262, PR tree-optimization/126257,
       PR middle-end/126084, PR tree-optimization/120201,
       PR tree-optimization/126194, PR tree-optimization/126150,
       PR tree-optimization/125953, PR middle-end/125875,
       PR tree-optimization/125786, PR tree-optimization/125668,
       PR tree-optimization/125296, PR tree-optimization/126008,
       PR tree-optimization/125730, PR tree-optimization/125040,
       PR ipa/125121, PR ipa/124128, PR target/126054 (S390),
       PR target/126148 (x86), PR tree-optimization/125597,
       PR tree-optimization/125597, PR tree-optimization/125597,
       PR target/126081 (or1k), PR target/126049 (RISCV),
       PR target/126098 (x86), PR target/67459 (SH), PR target/122948 (SH),
       PR target/125972 (S390), PR rtl-optimization/125173,
       PR target/124908 (AArch64), PR target/125838 (AArch64),
       PR target/125883 (x86), PR target/125818 (AArch64),
       PR target/125469 (x86), PR target/125469 (x86), PR target/125949 (x86),
       PR target/125992 (S390), PR middle-end/125977, PR target/125628 (MIPS),
       PR target/125478 (RISCV), PR target/106895 (PPC), PR target/122665 (PPC),
       PR target/125670 (RISCV), PR middle-end/125621,
       PR target/125148 (AArch64), PR tree-optimization/125431,
       PR target/125795 (AArch64), PR tree-optimization/125501,
       PR tree-optimization/125776, PR tree-optimization/125774,
       PR target/120144 (MIPS), PR ipa/125699, PR tree-optimization/125419,
       PR tree-optimization/125652, PR tree-optimization/125686,
       PR tree-optimization/125646, PR tree-optimization/125553,
       PR tree-optimization/125545, PR tree-optimization/125502,
       PR tree-optimization/125477, PR target/124948, PR c/125072, PR c/125935,
       PR c/125604, PR c/123569, PR c/125252, PR c/124303, PR c/124985,
       PR c++/126057, PR c++/126036, PR c++/126007, PR c++/125674, PR c++/91155,
       PR c++/126066, PR c++/125901, PR c++/126031, PR c++/121552, PR c++/124584,
       PR c++/121094, PR c++/117259, PR c++/123536, PR c++/125900, PR c++/125334,
       PR c++/125768, PR c++/125939, PR c++/125745, PR c++/125408, PR c++/124978,
       PR c++/115314, PR c++/125889, PR c++/125764, PR c++/125759, PR c++/65271,
       PR c++/125770, PR fortran/126234, PR fortran/125172, PR fortran/126210,
       PR fortran/126170, PR fortran/126127, PR fortran/103367,
       PR fortran/126018, PR fortran/125051, PR fortran/125902,
       PR fortran/125902, PR fortran/60576, PR fortran/125430,
       PR fortran/125527, PR fortran/125535, PR fortran/125650,
       PR fortran/125481, PR fortran/125527, PR fortran/125528,
       PR fortran/125529, PR fortran/125530, PR fortran/125531,
       PR fortran/125534, PR fortran/125535, PR lto/125257, PR libgcc/123976,
       PR target/125752 (AVR), PR libfortran/126116, PR libstdc++/126111,
       PR libstdc++/125956, PR libstdc++/118158, PR libstdc++/125228,
       PR libstdc++/125890.
   * Let the ada build fail on an alihash mismatch, if fail_on_alihash_mismatch
     is enabled.
   * Enable Modula-2 on powerpc and ppc64. Closes: #1141560, #1141596.
   * Enable LRA by default on m68k for snapshot builds (Adrian Glaubitz).
     Addresses: #1142039.
   * Disable running tests on Debian/riscv64 for meaningful build times.
Checksums-Sha1:
 92a7933ce6335c4e39321f0c4dd2e482c42045dc 52748 gcc-16_16.1.0-3.dsc
 dddd03ab9328bcbead7ff140d280addada8b1700 2616220 gcc-16_16.1.0-3.debian.tar.xz
 15d10aca2604ac690d0a21c5462da8274f309c8f 12488 gcc-16_16.1.0-3_source.buildinfo
Checksums-Sha256:
 7ca8a04cacfdf5ba640108af1674f5aa19d65f7bd9783a7405db531c62629b71 52748 gcc-16_16.1.0-3.dsc
 a1b894106d690972045f929c490138cd5b10de1a95924a7f3521b363dffd869a 2616220 gcc-16_16.1.0-3.debian.tar.xz
 d372252933984eada6c3bee9af11aa2f83f5102633eca56ec1ff35473486041e 12488 gcc-16_16.1.0-3_source.buildinfo
Files:
 fb331acba6b309da2693ca17d03491ca 52748 devel optional gcc-16_16.1.0-3.dsc
 fd822ff513ff0a2a994f85889cf194ad 2616220 devel optional gcc-16_16.1.0-3.debian.tar.xz
 2a3e22dbece5074196324828e472290c 12488 devel optional gcc-16_16.1.0-3_source.buildinfo
-----BEGIN PGP SIGNATURE-----
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=k/ol
-----END PGP SIGNATURE-----