[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/wlopm_0.1.0-1_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 [...] dpkg-buildpackage: info: source changed by Birger Schacht <birger@debian.org> dpkg-source --before-build . dpkg-buildpackage: info: host architecture amd64 debian/rules clean dh clean dh_auto_clean make -j8 clean make[1]: Entering directory '/build/reproducible-path/wlopm-0.1.0' rm -f wlopm wlr-output-power-management-unstable-v1.c wlr-output-power-management-unstable-v1.h wlopm.o wlr-output-power-management-unstable-v1.o make[1]: Leaving directory '/build/reproducible-path/wlopm-0.1.0' dh_clean debian/rules binary dh binary dh_update_autotools_config dh_autoreconf dh_auto_configure dh_auto_build make -j8 "INSTALL=install --strip-program=true" make[1]: Entering directory '/build/reproducible-path/wlopm-0.1.0' wayland-scanner private-code < wlr-output-power-management-unstable-v1.xml > wlr-output-power-management-unstable-v1.c wayland-scanner client-header < wlr-output-power-management-unstable-v1.xml > wlr-output-power-management-unstable-v1.h cc -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/wlopm-0.1.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter -Wconversion -Wformat-security -Wformat -Wsign-conversion -Wfloat-conversion -Wunused-result -Wdate-time -D_FORTIFY_SOURCE=2 -c -o wlopm.o wlopm.c cc -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/wlopm-0.1.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter -Wconversion -Wformat-security -Wformat -Wsign-conversion -Wfloat-conversion -Wunused-result -Wdate-time -D_FORTIFY_SOURCE=2 -c -o wlr-output-power-management-unstable-v1.o wlr-output-power-management-unstable-v1.c wlopm.c:127:24: error: initialization of ‘void (*)(void *, struct wl_output *, int32_t, int32_t, int32_t, int32_t, int32_t, const char *, const char *, int32_t)’ {aka ‘void (*)(void *, struct wl_output *, int, int, int, int, int, const char *, const char *, int)’} from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 127 | .geometry = noop, | ^~~~ wlopm.c:127:24: note: (near initialization for ‘wl_output_listener.geometry’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ wlopm.c:128:24: error: initialization of ‘void (*)(void *, struct wl_output *, uint32_t, int32_t, int32_t, int32_t)’ {aka ‘void (*)(void *, struct wl_output *, unsigned int, int, int, int)’} from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 128 | .mode = noop, | ^~~~ wlopm.c:128:24: note: (near initialization for ‘wl_output_listener.mode’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ wlopm.c:129:24: error: initialization of ‘void (*)(void *, struct wl_output *, int32_t)’ {aka ‘void (*)(void *, struct wl_output *, int)’} from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 129 | .scale = noop, | ^~~~ wlopm.c:129:24: note: (near initialization for ‘wl_output_listener.scale’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ wlopm.c:130:24: error: initialization of ‘void (*)(void *, struct wl_output *, const char *)’ from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 130 | .description = noop, | ^~~~ wlopm.c:130:24: note: (near initialization for ‘wl_output_listener.description’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ wlopm.c:131:24: error: initialization of ‘void (*)(void *, struct wl_output *)’ from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 131 | .done = noop, | ^~~~ wlopm.c:131:24: note: (near initialization for ‘wl_output_listener.done’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ wlopm.c:170:26: error: initialization of ‘void (*)(void *, struct wl_registry *, uint32_t)’ {aka ‘void (*)(void *, struct wl_registry *, unsigned int)’} from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 170 | .global_remove = noop, /* We don't run long enough to care. */ | ^~~~ wlopm.c:170:26: note: (near initialization for ‘registry_listener.global_remove’) wlopm.c:96:13: note: ‘noop’ declared here 96 | static void noop () {} | ^~~~ make[1]: *** [<builtin>: wlopm.o] Error 1 make[1]: Leaving directory '/build/reproducible-path/wlopm-0.1.0' dh_auto_build: error: make -j8 "INSTALL=install --strip-program=true" returned exit code 2 make: *** [debian/rules:6: binary] Error 25 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2