[This bug is NOT targeted to the upcoming trixie release] Please keep this issue open in the bug tracker for the package it was filed for. If a fix in another package is required, please file a bug for the other package (or clone), and add a block in this package. Please keep the issue open until the package can be built in a follow-up test rebuild. The package fails to build in a test rebuild on at least amd64 with gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The severity of this report will be raised before the forky release. The full build log can be found at: http://qa-logs.debian.net/2025/02/16/amd64exp/hypre_2.32.0-4_unstable_gccexp.log.gz The last lines of the build log are at the end of this report. To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly, or install the gcc, g++, gfortran, ... packages from experimental. apt-get -t=experimental install g++ GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS. Other Common build failures are new warnings resulting in build failures with -Werror turned on, or new/dropped symbols in Debian symbols files. For other C/C++ related build failures see the porting guide at http://gcc.gnu.org/gcc-15/porting_to.html [...] In file included from ilu.h:33, from distributed_qsort_si.c:26: struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ make[4]: *** [../../config/Makefile.config:55: distributed_qsort_si.o] Error 1 In file included from ./DistributedMatrixPilutSolver.h:115, from ilut.c:20: ././struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ ././struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards ././struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ In file included from ./DistributedMatrixPilutSolver.h:115, from HYPRE_DistributedMatrixPilutSolver.c:9: ././struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ ././struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards ././struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ make[4]: *** [../../config/Makefile.config:55: ilut.o] Error 1 In file included from ilu.h:33, from parutil.c:20: struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ make[4]: *** [../../config/Makefile.config:55: HYPRE_DistributedMatrixPilutSolver.o] Error 1 make[4]: *** [../../config/Makefile.config:55: parutil.o] Error 1 In file included from DistributedMatrixPilutSolver.h:115, from comm.c:25: ./struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ ./struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards ./struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ In file included from ./DistributedMatrixPilutSolver.h:115, from parilut.c:52: ././struct.h:43:26: error: ‘bool’ cannot be defined via ‘typedef’ 43 | typedef unsigned char bool; | ^~~~ ././struct.h:43:26: note: ‘bool’ is a keyword with ‘-std=c23’ onwards ././struct.h:43:4: warning: useless type name in empty declaration 43 | typedef unsigned char bool; | ^~~~~~~ make[4]: *** [../../config/Makefile.config:55: comm.o] Error 1 make[4]: *** [../../config/Makefile.config:55: parilut.o] Error 1 make[4]: Leaving directory '/build/reproducible-path/hypre-2.32.0/src/distributed_ls/pilut' make[3]: *** [Makefile:14: all] Error 1 make[3]: Leaving directory '/build/reproducible-path/hypre-2.32.0/src/distributed_ls' make[2]: *** [Makefile:91: all] Error 1 make[2]: Leaving directory '/build/reproducible-path/hypre-2.32.0/src' dh_auto_build: error: cd src && make -j8 returned exit code 2 make[1]: *** [debian/rules:152: override_dh_auto_build] Error 25 make[1]: Leaving directory '/build/reproducible-path/hypre-2.32.0' make: *** [debian/rules:25: binary] Error 2 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2