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/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/core/settings.c:289:8: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
                char name[ strlen ( name ) + 1 /* NUL */ ];
                     ^
11 warnings and 1 error generated.
kmk: *** [/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/out/freebsd.amd64/release/obj/iPxeBaseBin/src/core/settings.o] Error 1
The failing command:
@clang15 -m32 -c -O2 -fno-pie -fcommon -ffreestanding -ffunction-sections -march=i386 -fomit-frame-pointer -fstrength-reduce -falign-jumps=1 -falign-loops=1 -Os -falign-functions=1 -mstack-alignment=2 -mregparm=3 -mrtd -freg-struct-return -fshort-wchar -Ui386 -Ulinux -include compiler.h -Wall -W -Wformat-nonliteral -fno-stack-protector -fno-dwarf2-cfi-asm -Wno-address -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/include -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/arch/x86/include -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/arch/i386/include -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/arch/i386/include/pcbios -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/include -I/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/out/freebsd.amd64/release -DVBOX -DVBOX_OSE -DVBOX_WITH_64_BITS_GUESTS -DRT_OS_FREEBSD -D__FREEBSD__ -DRT_ARCH_AMD64 -D__AMD64__ -DVBOX_WITH_DEBUGGER -DVBOX_WITH_HARDENING -DRTPATH_APP_PRIVATE=\"/usr/local/share/virtualbox-ose\" -DRTPATH_APP_PRIVATE_ARCH=\"/usr/local/lib/virtualbox\" -DRTPATH_SHARED_LIBS=\"/usr/local/lib/virtualbox\" -DRTPATH_APP_DOCS=\"/usr/local/share/doc/virtualbox-ose\" -DARCH=i386 -DPLATFORM=pcbios -DVERSION_MAJOR=1 -DVERSION_MINOR=0 -DVERSION_PATCH=0 -DVERSION=\"1.0.0+\" -D_build_id=0xaffeaffe -DOBJECT=settings -Wp,-MD,/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/out/freebsd.amd64/release/obj/iPxeBaseBin/src/core/settings.o.dep -Wp,-MT,/wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/out/freebsd.amd64/release/obj/iPxeBaseBin/src/core/settings.o -Wp,-MP -o /wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/out/freebsd.amd64/release/obj/iPxeBaseBin/src/core/settings.o /wrkdirs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/PC/ipxe/src/core/settings.c
*** Error code 2

Stop.
…