https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69361
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> --- Notes to self: Trying to locate the "-h" option. grep -nH -e "^h" *.opt common.opt:2759:h which is: h Driver Joined Separate it was added in r166155 (37ef985f35a963f06b8112872899cb9d6811969) which suggests it's a shorthand for --soname on FreeBSD.