Bug#1096304: amavisd-milter: ftbfs with GCC-15

[Matthias Klose <doko@debian.org>]

Package: src:amavisd-milter
Version: 1.7.2-1
Severity: important
Tags: sid forky
User: debian-gcc@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/amavisd-milter_1.7.2-1_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

[...]
target_cpu='x86_64'
target_os='linux-gnu'
target_vendor='pc'

## ----------- ##
## confdefs.h. ##
## ----------- ##

/* confdefs.h */
#define PACKAGE_NAME "amavisd-milter"
#define PACKAGE_TARNAME "amavisd-milter"
#define PACKAGE_VERSION "1.7.2-1"
#define PACKAGE_STRING "amavisd-milter 1.7.2-1"
#define PACKAGE_BUGREPORT ""
#define PACKAGE_URL ""
#define PACKAGE "amavisd-milter"
#define VERSION "1.7.2-1"
#define HAVE_PTHREAD 1
#define HAVE_SEM_TIMEDWAIT 1
#define HAVE_STDIO_H 1
#define HAVE_STDLIB_H 1
#define HAVE_STRING_H 1
#define HAVE_INTTYPES_H 1
#define HAVE_STDINT_H 1
#define HAVE_STRINGS_H 1
#define HAVE_SYS_STAT_H 1
#define HAVE_SYS_TYPES_H 1
#define HAVE_UNISTD_H 1
#define HAVE_SYS_TIME_H 1
#define STDC_HEADERS 1
#define HAVE_DIRENT_H 1
#define HAVE__BOOL 1
#define HAVE_STDBOOL_H 1
#define TIME_WITH_SYS_TIME 1
#define HAVE_STRUCT_TM_TM_ZONE 1
#define HAVE_TM_ZONE 1
#define HAVE_ARPA_INET_H 1
#define HAVE_CTYPE_H 1
#define HAVE_ERRNO_H 1
#define HAVE_FCNTL_H 1
#define HAVE_LIMITS_H 1
#define HAVE_NETINET_IN_H 1
#define HAVE_STDARG_H 1
#define HAVE_STDIO_H 1
#define HAVE_STDLIB_H 1
#define HAVE_STRING_H 1
#define HAVE_SYS_PARAM_H 1
#define HAVE_SYS_TIME_H 1
#define HAVE_SYS_TYPES_H 1
#define HAVE_SYS_SOCKET_H 1
#define HAVE_SYS_STAT_H 1
#define HAVE_SYS_UN_H 1
#define HAVE_SYSLOG_H 1
#define HAVE_SYSEXITS_H 1
#define HAVE_UNISTD_H 1
#define HAVE_FTS_H 1
#define HAVE_ARC4RANDOM 1
#define HAVE_DAEMON 1
#define HAVE_FTS_OPEN 1
#define HAVE_MKDTEMP 1
#define HAVE_STRLCPY 1
#define HAVE_DIRENT_H 1
#define HAVE_DIRFD 1

configure: exit 1
dh_auto_configure: error: ./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 --localstatedir=/var/lib/amavis --with-working-dir=/var/lib/amavis/tmp returned exit code 1
make[1]: *** [debian/rules:14: override_dh_auto_configure] Error 25
make[1]: Leaving directory '/build/reproducible-path/amavisd-milter-1.7.2'
make: *** [debian/rules:11: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2