___  _____  ____  ____  _  _  _____  ____  ____
  / __)(  _  )(  _ \( ___)( \/ )(  _  )(_  _)(  _ \ 
 ( (__  )(_)(  )(_) ))__)  \  /  )(_)(  _)(_  )(_) )
  \___)(_____)(____/(____)  \/  (_____)(____)(____/
   PASTEBIN - CREATED: 2019/10/29 at 14:09 (CET)

your paste:
------------------------------------------------------------------------

~/work/NASM> make
# compile
nasm -f elf64 hello.asm -o hello.o
# link
ld.bfd -m elf_x86_64_obsd -o hello hello.o
ld.bfd: unrecognised emulation mode: elf_x86_64_obsd
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu elf_l1om elf_k1om i386pep i386pe
make: *** [Makefile:7: openbsd] Error 1

------------------------------------------------------------------------
                                                    thanks for using me.