I've proposed installing llvm-objdump as objdump in https://reviews.freebsd.org/D18307, but llvm-objdump does not currently have a man page. This will need to be resolved in order to make the switch.
Initial man page in D18309
Upstream submission at http://reviews.llvm.org/D54864
A commit references this bug:
Date: Mon Nov 26 14:34:31 UTC 2018
New revision: 340972
llvm-objdump: initial man page
Based on llvm-objdump's online documentation and usage information.
This serves as a starting point; additional detail and cleanup still
Also being submitted upstream in LLVM review D54864. I expect to use
this bespoke copy while we have LLVM 6.0 or 7.0 in FreeBSD; when we
update to LLVM 8.0 it should be upstream and we will switch to it.
Reviewed by: bcr (man formatting)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18309