Which ports to install to compile gnu binutils?

[Tomasz CEDRO]

another way is to use old os and distribution that has it in the binary
packages and run it in the vm just for that particular case you need :-)

there may be a linux image within a docker for rapid deployment with that
tools that you need people are using this method for CI and builds on a
strange / old configurations with one click.

if you want to use it on FreeBSD then you may want to create a dedicated
port to make compile easy and maybe even provide a binary package of the
outdated software.

sometimes its the only way and it (usually) works :-)

--
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info