[Pkg-monitoring-maintainers] Bug#1096591: etbemon: ftbfs with GCC-15

[Matthias Klose]

Package: src:etbemon
Version: 1.4.1-1
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/etbemon_1.4.1-1_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 distribution unstable
dpkg-buildpackage: info: source changed by Russell Coker <russell at coker.com.au>
 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/etbemon-1.4.1'
dh_auto_clean
/usr/bin/make -C mon.d clean
make[2]: Entering directory '/build/reproducible-path/etbemon-1.4.1/mon.d'
rm -f rpc.monitor dialin.monitor.wrap
make[2]: Leaving directory '/build/reproducible-path/etbemon-1.4.1/mon.d'
/usr/bin/make -C mon-local.d clean
make[2]: Entering directory '/build/reproducible-path/etbemon-1.4.1/mon-local.d'
rm -f deleted-mapped.monitor
make[2]: Leaving directory '/build/reproducible-path/etbemon-1.4.1/mon-local.d'
/usr/bin/make -C bin clean
make[2]: Entering directory '/build/reproducible-path/etbemon-1.4.1/bin'
rm -f btrfs.helper zfs.helper smartctl.helper hplog.helper
make[2]: Leaving directory '/build/reproducible-path/etbemon-1.4.1/bin'
make[1]: Leaving directory '/build/reproducible-path/etbemon-1.4.1'
   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/etbemon-1.4.1'
dh_auto_build
/usr/bin/make -C mon.d CFLAGS="-g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/etbemon-1.4.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection" && cd /build/reproducible-path/etbemon-1.4.1
make[2]: Entering directory '/build/reproducible-path/etbemon-1.4.1/mon.d'
gcc -o rpc.monitor -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/etbemon-1.4.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection `dpkg-buildflags --get CPPFLAGS` -I/usr/include/tirpc `dpkg-buildflags --get LDFLAGS` rpc.monitor.c -ltirpc
rpc.monitor.c: In function ‘test_host’:
rpc.monitor.c:252:21: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  252 |     signal(SIGALRM, alarm_nop);
      |                     ^~~~~~~~~
      |                     |
      |                     void (*)(void)
In file included from rpc.monitor.c:42:
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
rpc.monitor.c:85:6: note: ‘alarm_nop’ declared here
   85 | void alarm_nop();
      |      ^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
rpc.monitor.c: In function ‘test_programs’:
rpc.monitor.c:341:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  341 |         signal(SIGALRM, alarm_nop);
      |                         ^~~~~~~~~
      |                         |
      |                         void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
rpc.monitor.c:85:6: note: ‘alarm_nop’ declared here
   85 | void alarm_nop();
      |      ^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
make[2]: *** [Makefile:24: rpc.monitor] Error 1
make[2]: Leaving directory '/build/reproducible-path/etbemon-1.4.1/mon.d'
make[1]: *** [debian/rules:15: override_dh_auto_build] Error 2
make[1]: Leaving directory '/build/reproducible-path/etbemon-1.4.1'
make: *** [debian/rules:5: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2