ДВС.
строю мир freebsd12.2 на RPI3.
смотрю ps -axwwww | grep TARGET:

56377  1  RN     0:53,09 c++ -target aarch64-unknown-freebsd12.2 
--sysroot=/usr/obj/usr/src/arm64.aarch64/tmp 
-B/usr/obj/usr/src/arm64.aarch64/tmp/usr/bin 
-O2 
-pipe 
-fno-common 
-I/usr/obj/usr/src/arm64.aarch64/lib/clang/libllvm -I/usr/src/contrib/llvm-project/llvm/lib/Target/AArch64 
-I/usr/src/contrib/llvm-project/llvm/lib/Target/ARM -I/usr/src/contrib/llvm-project/llvm/lib/Target/Mips 
-I/usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC -I/usr/src/contrib/llvm-project/llvm/lib/Target/RISCV 
-I/usr/src/contrib/llvm-project/llvm/lib/Target/Sparc -I/usr/src/contrib/llvm-project/llvm/lib/Target/X86 -I/usr/src/lib/clang/include 
-I/usr/src/contrib/llvm-project/llvm/include -D__STDC_CONSTANT_MACROS 
-D__STDC_FORMAT_MACROS 
-D__STDC_LIMIT_MACROS 
-DHAVE_VCS_VERSION_INC 
-DNDEBUG 
-DLLVM_DEFAULT_TARGET_TRIPLE="aarch64-unknown-freebsd12.2" 
-DLLVM_HOST_TRIPLE="aarch64-unknown-freebsd12.2" 
-DDEFAULT_SYSROOT="" 
-DLLVM_TARGET_ENABLE_AARCH64 
-DLLVM_TARGET_ENABLE_ARM 
-DLLVM_TARGET_ENABLE_MIPS 
-DLLVM_TARGET_ENABLE_POWERPC 
-DLLVM_TARGET_ENABLE_RISCV 
-DLLVM_TARGET_ENABLE_SPARC 
-DLLVM_TARGET_ENABLE_X86 
-DLLVM_NATIVE_ASMPARSER=LLVMInitializeAArch64AsmParser 
-DLLVM_NATIVE_ASMPRINTER=LLVMInitializeAArch64AsmPrinter 
-DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeAArch64Disassembler 
-DLLVM_NATIVE_TARGET=LLVMInitializeAArch64Target 
-DLLVM_NATIVE_TARGETINFO=LLVMInitializeAArch64TargetInfo 
-DLLVM_NATIVE_TARGETMC=LLVMInitializeAArch64TargetMC 
-ffunction-sections 
-fdata-sections 
-DNDEBUG 
-MD 
-MF.depend.Target_Sparc_SparcTargetObjectFile.o 
-MTTarget/Sparc/SparcTargetObjectFile.o 
-fstack-protector-strong 
-Qunused-arguments 
-fno-exceptions 
-fno-rtti 
-std=c++14 
-stdlib=libc++ 
-Wno-c++11-extensions 
-c /usr/src/contrib/llvm-project/llvm/lib/Target/Sparc/SparcTargetObjectFile.cpp 
-o Target/Sparc/SparcTargetObjectFile.o

Вопрос:
Меня смущают строки типа

-DLLVM_TARGET_ENABLE_MIPS 
-DLLVM_TARGET_ENABLE_POWERPC 
-DLLVM_TARGET_ENABLE_RISCV 
-DLLVM_TARGET_ENABLE_SPARC 
-DLLVM_TARGET_ENABLE_X86 

Зачем, ведь целевая архитектура arm64?
Объясните, плиз.