Build error on Freebsd for Incinga2 aarch64

Hi everyone,
my question might be a bit odd, I hope this is the right place.
I try to compile opnsense on freebsd for the aarch64 architecture ( )and one of the ports that is built automatically is icinga2. The problem is: the build of incinga2 fails with this error:

/bin/sh /usr/obj/usr/ports/devel/gdb/work-py38/gdb-12.1/gdb/../mkinstalldirs target/.deps
/bin/sh /usr/obj/usr/ports/devel/gdb/work-py38/gdb-12.1/gdb/../mkinstalldirs nat/.deps
mkdir python
mkdir python/.deps
mkdir nat
mkdir nat/.deps
mkdir target
mkdir target/.deps
  GEN    stamp-version
  CXX    x86-tdep.o
  CXX    xcoffread.o
  CXX    windows-tdep.o
  GEN    xml-builtin.c
  CXX    xml-support.o
  CXX    xml-syscall.o
  CXX    xml-tdesc.o
  CXX    xstormy16-tdep.o
  CXX    xtensa-config.o
  CXX    xtensa-linux-tdep.o
  CXX    xtensa-tdep.o
  CXX    z80-tdep.o
  GEN    init.c
  CXX    kgdb-main.o
  CXX    gdb.o
  CXX    aarch32-tdep.o
  CXX    aarch64-fbsd-kern.o
  CXX    aarch64-fbsd-nat.o
  CXX    aarch64-fbsd-tdep.o
  CXX    aarch64-linux-tdep.o
  CXX    aarch64-nat.o
/usr/obj/usr/ports/devel/gdb/work-py38/gdb-12.1/gdb/aarch64-fbsd-nat.c:79:31: error: no member named 'debug_regs_probed' in 'aarch64_fbsd_na
bool aarch64_fbsd_nat_target::debug_regs_probed;
1 error generated.
gmake[3]: *** [Makefile:1666: aarch64-fbsd-nat.o] Error 1
gmake[3]: *** Waiting for unfinished jobs....
gmake[3]: Leaving directory '/usr/obj/usr/ports/devel/gdb/work-py38/.build/gdb'
gmake[2]: *** [Makefile:10434: all-gdb] Error 2
gmake[2]: Leaving directory '/usr/obj/usr/ports/devel/gdb/work-py38/.build'
gmake[1]: *** [Makefile:1000: all] Error 2
gmake[1]: Leaving directory '/usr/obj/usr/ports/devel/gdb/work-py38/.build'
[20220519091806] ===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

make: stopped in /usr/ports/devel/gdb
Creating repository in /usr/obj/usr/tools/config/22.1/OpenSSL:aarch64/.pkg-new/: 100%
Packing files for repository: 100%
>>> Running build step: clean
>>> Passing arguments: packages
>>> Removing packages set
>>> Creating package mirror set for 22.1.7_93-OpenSSL-aarch64... done
-rw-r--r--  1 root  wheel   179M May 19 11:18 packages-22.1.7_93-OpenSSL-aarch64.tar
>>> ERROR: The build encountered fatal issues!
>>> Aborted version 12.1 for devel/gdb
*** Error code 1

make: stopped in /usr/tools

I made sure to run both “make ports-icinga2” and “make MAKE_JOBS_UNSAFE=yes ports-icinga2” and they both end up with the same error (above)

Is this the right place to ask this question?
If so: what could I do about this error?

kind regards,