Bug#1057522: libsvm: FTBFS with default Java 21

[Vladimir Petko]

Source: libsvm
Version: 3.24+ds-6
Severity: important
Tags: ftbfs
User: debian-java at lists.debian.org
Usertags: default-java21

Dear Maintainers,

The package libsvm ftbfs with default Java 21.
The relevant part of the build log:
---------------
m4 libsvm/svm.m4 > libsvm/svm.java
javac -target 1.7 -source 1.7 libsvm/svm.java
warning: [options] bootstrap class path not set in conjunction with -source 7
error: Source option 7 is no longer supported. Use 8 or later.
error: Target option 7 is no longer supported. Use 8 or later.
make[3]: *** [Makefile:17: libsvm/svm.class] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>/java'
make[2]: *** [debian/rules:56: override_dh_auto_build-indep] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: *** [debian/rules:39: build] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:39: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2023-12-04T10:19:30Z
---------------


-- System Information:
Debian Release: trixie/sid
  APT prefers mantic-updates
  APT policy: (500, 'mantic-updates'), (500, 'mantic-security'), (500, 'mantic')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.5.0-13-generic (SMP w/32 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled