impossible to generate kernel for arch x86_64H due to firehose

[bigkahuna666]

Hi, I am quite new to kernel compiling/debugging and especially the new firehose library.

I just tried to compile a new XNU kernel with the following command:
bash-3.2# make SDKROOT=macosx ARCH_CONFIGS=X86_64H KERNEL_CONFIGS=RELEASE

But I am getting this error just before it normally finishes:

"...
CC syscalls.o
LDFILELIST bsd
CC lastkerneldataconst.o
CC lastkernelconstructor.o
CC version.o
LD kernel.unstripped
ld: object file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/local/lib/kernel/libfirehose_kernel.a(firehose_buffer.o) was built for different x86_64 sub-type (3) than link command line (8) for architecture x86_64h
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [/Users/philippvonfrankenberg/Desktop/Kernel/xnu-3789.41.3/BUILD/obj/RELEASE_X86_64H//kernel.unstripped] Error 1
make[2]: *** [build_all] Error 2
make[1]: *** [build_all_bootstrap_RELEASE^X86_64H^NONE] Error 2
make: *** [all] Error 2
"

Can anybody tell me how I can install firehose library as x86_64H architecture?