Bug#1096844: invaders: ftbfs with GCC-15

[Matthias Klose]

Package: src:invaders
Version: 1.0.0-15
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/invaders_1.0.0-15_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-source: info: unpacking invaders_1.0.0.orig.tar.gz
dpkg-source: info: unpacking invaders_1.0.0-15.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying 01-misspelling-loose.patch
dpkg-source: info: applying 01-uint8-char.patch
dpkg-source: info: applying 02-build-flags.patch
dpkg-source: info: applying 02-static-inline.patch
dpkg-source: info: applying 03-reboot-on-esc.patch
dpkg-source: info: applying 04-change-colors.patch
dpkg-source: info: applying 05-pause.patch
dpkg-source: info: applying 06-speed-up.patch

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 invaders
dpkg-buildpackage: info: source version 1.0.0-15
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Fabian Greffrath <fabian at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
 debian/rules clean
dh clean
   debian/rules override_dh_auto_clean
make[1]: Entering directory '/build/reproducible-path/invaders-1.0.0'
sh ./clean.sh
rm -f *.o *~ invaders.exec
make[1]: Leaving directory '/build/reproducible-path/invaders-1.0.0'
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   debian/rules override_dh_auto_build
make[1]: Entering directory '/build/reproducible-path/invaders-1.0.0'
sh ./compile.sh

CFLAGS="-ffreestanding -fno-stack-protector -m32 -nostdinc -nostdlib -I. -O2 -Wall"
LDFLAGS="-Wl,-N -Wl,-T -Wl,debian/invaders.ld -Wl,--build-id=none"
gcc $CFLAGS -c keyboard.c
In file included from keyboard.h:4,
                 from keyboard.c:1:
types.h:16:15: error: two or more data types in declaration specifiers
   16 | typedef uint8 bool;
      |               ^~~~
types.h:16:1: warning: useless type name in empty declaration
   16 | typedef uint8 bool;
      | ^~~~~~~
make[1]: *** [debian/rules:7: override_dh_auto_build] Error 1
make[1]: Leaving directory '/build/reproducible-path/invaders-1.0.0'
make: *** [debian/rules:4: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2