Bug#1096840: insserv: ftbfs with GCC-15

[Matthias Klose]

Package: src:insserv
Version: 1.26.0-1
Severity: important
Tags: sid forky
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-15

[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/insserv_1.26.0-1_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

[...]
Check disk space
----------------

Sufficient free space for build

User Environment
----------------

APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=C.UTF-8
LC_ALL=C.UTF-8
LOGNAME=user42
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
SHELL=/bin/sh
USER=user42

dpkg-buildpackage
-----------------

Command: dpkg-buildpackage --sanitize-env -us -uc -b
dpkg-buildpackage: info: source package insserv
dpkg-buildpackage: info: source version 1.26.0-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Mark Hindley <leepen at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
 debian/rules clean
echo -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection 
-g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
dh clean --with=bash-completion
   dh_auto_clean
	make -j8 distclean
make[1]: Entering directory '/build/reproducible-path/insserv-1.26.0'
rm -f *.o *~ insserv insserv.8 config.h .depend.* .system
rm -f insserv-1.26.0.tar.xz insserv-1.26.0.tar.xz.sig
rm -f insserv
rm -rf tests/root
make[1]: Leaving directory '/build/reproducible-path/insserv-1.26.0'
   dh_clean
 debian/rules binary
echo -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection 
-g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
dh binary --with=bash-completion
   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/insserv-1.26.0'
sed -r '\!@@BEGIN_SUSE@@!,\!@@(ELSE|END)_SUSE@@!d;\!@@(NOT|END)_SUSE@@!d' < insserv.8.in > insserv.8
cc -W -Wall -Wunreachable-code -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection  -Wdate-time -D_FORTIFY_SOURCE=2   -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64  -DINITDIR=\"/etc/init.d\" -DINSCONF=\"/etc/insserv.conf\" -pipe   -c map.c
cc -W -Wall -Wunreachable-code -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/insserv-1.26.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection  -Wdate-time -D_FORTIFY_SOURCE=2   -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64  -DINITDIR=\"/etc/init.d\" -DINSCONF=\"/etc/insserv.conf\" -pipe   -c listing.c
In file included from map.c:9:
listing.h:27:24: error: cannot use keyword ‘false’ as enumeration constant
   27 | typedef enum _boolean {false, true} boolean;
      |                        ^~~~~
listing.h:27:24: note: ‘false’ is a keyword with ‘-std=c23’ onwards
make[1]: *** [Makefile:102: map.o] Error 1
make[1]: *** Waiting for unfinished jobs....
In file included from listing.c:32:
listing.h:27:24: error: cannot use keyword ‘false’ as enumeration constant
   27 | typedef enum _boolean {false, true} boolean;
      |                        ^~~~~
listing.h:27:24: note: ‘false’ is a keyword with ‘-std=c23’ onwards
make[1]: *** [Makefile:99: listing.o] Error 1
make[1]: Leaving directory '/build/reproducible-path/insserv-1.26.0'
dh_auto_build: error: make -j8 "INSTALL=install --strip-program=true" returned exit code 2
make: *** [debian/rules:13: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2