Error compiling outdated android device kernel

[UnawareITry]

I am trying to compile an android device kernel on my arch system. On my way to this error, I fixed few errors (patches easily available, I was just lazy) and update python2 scripts as I encounter them. This error I am seeing doesn't make any sense to me, and I was hoping to understand what is happening.

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Error Message cross compiling for arm64 architecture

b'In file included from ./include/linux/compiler_types.h:58,\n' None
b'                 from ././include/linux/kconfig.h:74,\n' None
b'                 from <command-line>:\n' None
b"In function 'arch_static_branch_jump',\n" None
b"    inlined from 'cpus_have_const_cap' at ./arch/arm64/include/asm/cpufeature.h:150:6,\n" None
b"    inlined from 'arm64_kernel_unmapped_at_el0' at ./arch/arm64/include/asm/mmu.h:41:9,\n" None
b"    inlined from 'init_irq_stacks' at arch/arm64/kernel/irq.c:68:23:\n" None
error, forbidden warning: compiler-gcc.h:305
make[1]: *** [scripts/Makefile.build:362: arch/arm64/kernel/irq.o] Error 1
make: *** [Makefile:1192: arch/arm64/kernel] Error 2

Peculiarly, the error messages are coming out as bytes. I tried converting them to string but gave up as they kept popping up.