Bug#1132059: adios2: ftbfs with GCC-16

[Emanuele Rocca]

Package: src:adios2
Version: 2.11.0+dfsg1-6
Severity: important
Tags: sid forky ftbfs
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-16

Hi,

adios2 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/adios2_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.

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.

[...]


-- Detecting CXX compile features - done
-- Found MPI_C: /usr/bin/mpicc.openmpi (found version "3.1")
-- Found MPI_CXX: /usr/bin/mpic++.openmpi (found version "3.1")
-- Found MPI: TRUE (found version "3.1")
-- Found adios2: /build/reproducible-path/adios2-2.11.0+dfsg1/install-mpi/usr/lib/aarch64-linux-gnu/cmake/adios2/mpi/adios2-config.cmake (found version "2.11.0") found components: C CXX MPI
-- The Fortran compiler identification is unknown
--------------------------------------------------------------------------
The Open MPI wrapper compiler was unable to find the specified compiler
gfortran-15 in your PATH.

Note that this compiler was either specified at configure time or in
one of several possible environment variables.
--------------------------------------------------------------------------
-- Detecting Fortran compiler ABI info
-- Detecting Fortran compiler ABI info - failed
-- Check for working Fortran compiler: /usr/bin/mpifort.openmpi
-- Check for working Fortran compiler: /usr/bin/mpifort.openmpi - broken
CMake Error at /usr/share/cmake-4.3/Modules/CMakeTestFortranCompiler.cmake:59 (message):
  The Fortran compiler

    "/usr/bin/mpifort.openmpi"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: '/tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU'
    
    Run Build Command(s): /usr/bin/cmake -E env VERBOSE=1 /usr/bin/gmake -f Makefile cmTC_2888d/fast
    gmake[2]: Entering directory '/tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU'
    /usr/bin/gmake  -f CMakeFiles/cmTC_2888d.dir/build.make CMakeFiles/cmTC_2888d.dir/build
    gmake[3]: Entering directory '/tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU'
    Building Fortran object CMakeFiles/cmTC_2888d.dir/testFortranCompiler.f.o
    /usr/bin/mpifort.openmpi   -g -O2 -ffile-prefix-map=/build/reproducible-path/adios2-2.11.0+dfsg1=. -fstack-protector-strong -fstack-clash-protection -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2  -c /tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU/testFortranCompiler.f -o CMakeFiles/cmTC_2888d.dir/testFortranCompiler.f.o
    --------------------------------------------------------------------------
    The Open MPI wrapper compiler was unable to find the specified compiler
    gfortran-15 in your PATH.
    
    Note that this compiler was either specified at configure time or in
    one of several possible environment variables.
    --------------------------------------------------------------------------
    gmake[3]: *** [CMakeFiles/cmTC_2888d.dir/build.make:81: CMakeFiles/cmTC_2888d.dir/testFortranCompiler.f.o] Error 1
    gmake[3]: Leaving directory '/tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU'
    gmake[2]: *** [Makefile:134: cmTC_2888d/fast] Error 2
    gmake[2]: Leaving directory '/tmp/tmp.5BzhWC32yk/CMakeFiles/CMakeScratch/TryCompile-nZVyQU'
    
    



  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:12 (enable_language)


-- Configuring incomplete, errors occurred!
Failed
CMake Error at cmake/install/post/cmake_install.cmake:49 (message):
  generate-adios2-config.sh returned 1, should be 0
Call Stack (most recent call first):
  cmake_install.cmake:81 (include)


FAILED: [code=1] CMakeFiles/install.util 
cd /build/reproducible-path/adios2-2.11.0+dfsg1/build-mpi && /usr/bin/cmake -P cmake_install.cmake
ninja: build stopped: subcommand failed.
dh_auto_install: error: cd build-mpi && DESTDIR=/build/reproducible-path/adios2-2.11.0\+dfsg1/install-mpi LC_ALL=C.UTF-8 ninja install returned exit code 1
make[1]: *** [debian/rules:133: install_mpi] Error 25
make[1]: Leaving directory '/build/reproducible-path/adios2-2.11.0+dfsg1'
make: *** [debian/rules:47: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2