[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/xtail_2.1-11_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 [...] autoheader: autoheader: WARNING: AC_DEFINE([NEED_FUNC_MAIN], 1, autoheader: [Define if a function 'main' is needed.]) autoheader: autoheader: WARNING: More sophisticated templates can also be produced, see the autoheader: WARNING: documentation. dh_auto_configure ./configure --build=x86_64-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/x86_64-linux-gnu --runstatedir=/run --disable-maintainer-mode --disable-dependency-tracking checking for a BSD-compatible install... /usr/bin/install -c checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... none needed checking for stdio.h... yes checking for stdlib.h... yes checking for string.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for strings.h... yes checking for sys/stat.h... yes checking for sys/types.h... yes checking for unistd.h... yes checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for dirent.h that defines DIR... yes checking for library containing opendir... none required checking for stdlib.h... (cached) yes checking for unistd.h... (cached) yes checking for termios.h... yes checking for an ANSI C-conforming const... yes checking for off_t... yes checking whether struct tm is in sys/time.h or time.h... time.h checking return type of signal handlers... void checking for difftime... yes checking for strerror... yes configure: creating ./config.status config.status: creating Makefile config.status: WARNING: 'Makefile.in' seems to ignore the --datarootdir setting config.status: creating config.h dh_auto_build make -j8 make[1]: Entering directory '/build/reproducible-path/xtail-2.1' gcc -Wall -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/xtail-2.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -c -o xtail.o xtail.c gcc -Wall -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/xtail-2.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -c -o entryfuncs.o entryfuncs.c gcc -Wall -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/xtail-2.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -c -o miscfuncs.o miscfuncs.c xtail.c: In function ‘main’: xtail.c:365:29: error: conflicting types for ‘sleep’; have ‘unsigned int(void)’ 365 | extern unsigned sleep(); | ^~~~~ In file included from xtail.c:9: /usr/include/unistd.h:464:21: note: previous declaration of ‘sleep’ with type ‘unsigned int(unsigned int)’ 464 | extern unsigned int sleep (unsigned int __seconds); | ^~~~~ xtail.c:367:20: error: too many arguments to function ‘sleep’; expected 0, have 1 367 | (void) sleep(SLEEP_TIME); | ^~~~~ xtail.c:365:29: note: declared here 365 | extern unsigned sleep(); | ^~~~~ make[1]: *** [<builtin>: xtail.o] Error 1 make[1]: *** Waiting for unfinished jobs.... make[1]: Leaving directory '/build/reproducible-path/xtail-2.1' dh_auto_build: error: make -j8 returned exit code 2 make: *** [debian/rules:7: binary] Error 25 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2