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Date: Mon, 13 Apr 2026 15:03:06 +0200
From: Emanuele Rocca &lt;ema@debian.org&gt;
To: maintonly@bugs.debian.org
Subject: elpa: ftbfs with GCC-16
Message-ID: &lt;adzpiklcHjil8Vge@ariel.home&gt;
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Package: src:elpa
Version: 2022.11.001-4
Severity: important
Tags: sid forky ftbfs
User: debian-gcc@lists.debian.org
Usertags: ftbfs-gcc-16

Hi,

elpa fails to build in a test rebuild on at least amd64 and arm64 with
gcc-16/g++-16, but builds properly with gcc-15/g++-15. The severity of this
report will be raised before the forky release.

The full build log can be found at:
https://people.debian.org/~ema/gcc-16-rebuilds/output-1/elpa_arm64.build.xz

The last lines of the build log are at the end of this report.

To build with GCC 16, either set CC=gcc-16 CXX=g++-16 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

Common build failures include unused (but set) variables, array subscripts
partly outside array bounds, and new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-16/porting_to.html

Please only close this issue after double-checking that the package can be
built correctly with GCC 16.

Please do not reassign this bug to another package. If a fix in another package
is required, then file a bug for the other package (or clone), and mark this
bug as blocked by the bug in the other package.

[...]


htmldir='${docdir}'
icx_found=''
ifGNUmake=''
include ../fdep/fortran_dependencies.mk
includedir='${prefix}/include'
infodir='${prefix}/share/info'
install_sh='${SHELL} /build/reproducible-path/elpa-2022.11.001/install-sh'
libdir='${prefix}/lib/aarch64-linux-gnu'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='/var'
mandir='${prefix}/share/man'
mkdir_p='$(MKDIR_P)'
nvcc_found=''
oldincludedir='/usr/include'
pdfdir='${docdir}'
pkgpyexecdir=''
pkgpythondir=''
prefix='/usr'
program_transform_name='s,x,x,'
psdir='${docdir}'
pyexecdir=''
pytest_found=''
pythondir=''
runstatedir='/run'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sysconfdir='/etc'
target_alias=''
xxd_CHECK=''

## ----------- ##
## confdefs.h. ##
## ----------- ##

/* confdefs.h */
#define PACKAGE_NAME &quot;elpa&quot;
#define PACKAGE_TARNAME &quot;elpa&quot;
#define PACKAGE_VERSION &quot;2022.11.001&quot;
#define PACKAGE_STRING &quot;elpa 2022.11.001&quot;
#define PACKAGE_BUGREPORT &quot;elpa-library@mpcdf.mpg.de&quot;
#define PACKAGE_URL &quot;&quot;
#define PACKAGE &quot;elpa&quot;
#define VERSION &quot;2022.11.001&quot;
#define EARLIEST_API_VERSION 20170403
#define CURRENT_API_VERSION 20221109
#define EARLIEST_AUTOTUNE_VERSION 20171201
#define CURRENT_AUTOTUNE_VERSION 20221109
#define CURRENT_AUTOTUNE_VERSION 20221109
#define CURRENT_AUTOTUNE_VERSION 20221109
#define ELPA_BUILDTIME 1745764293
#define WITH_MPI 1
#define HAVE_STDIO_H 1
#define HAVE_STDLIB_H 1
#define HAVE_STRING_H 1
#define HAVE_INTTYPES_H 1
#define HAVE_STDINT_H 1
#define HAVE_STRINGS_H 1
#define HAVE_SYS_STAT_H 1
#define HAVE_SYS_TYPES_H 1
#define HAVE_UNISTD_H 1
#define STDC_HEADERS 1
#define SIZEOF_LONG_INT 8
#define HAVE_VSX_SSE 1

configure: exit 1
dh_auto_configure: error: cd build &amp;&amp; ../configure --build=aarch64-linux-gnu --prefix=/usr --includedir=\${prefix}/include --mandir=\${prefix}/share/man --infodir=\${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules --libdir=\${prefix}/lib/aarch64-linux-gnu --runstatedir=/run --disable-maintainer-mode --disable-dependency-tracking --disable-silent-rules --disable-sse --disable-sse-assembly --disable-avx --disable-avx2 --disable-avx512 returned exit code 1
make[1]: *** [debian/rules:41: override_dh_auto_configure] Error 25
make[1]: Leaving directory '/build/reproducible-path/elpa-2022.11.001'
make: *** [debian/rules:38: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
]