afl does not compile on arm64 with OCaml < 4.06

[kit-ty-kate]

#9 271.7 # ../../boot/ocamlrun ../../ocamlopt -nostdlib -I ../../stdlib -shared -o unix.cmxs -I . unix.cmxa
#9 271.7 # /usr/bin/ld: unix.a(unix.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `camlUnix' which may bind externally can not be used when making a shared object; recompile with -fPIC
#9 271.7 # unix.a(unix.o): in function `camlUnix__fun_3109':
#9 271.7 # /home/opam/.opam/4.05/.opam-switch/build/ocaml-variants.4.05.0+afl/otherlibs/unix/unix.ml:96:(.text+0x26c0): dangerous relocation: unsupported relocation
#9 271.7 # /usr/bin/ld: unix.a(unix.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `camlUnix' which may bind externally can not be used when making a shared object; recompile with -fPIC
#9 271.7 # unix.a(unix.o): in function `camlUnix__handle_unix_error_1303':
#9 271.7 # /home/opam/.opam/4.05/.opam-switch/build/ocaml-variants.4.05.0+afl/otherlibs/unix/unix.ml:171:(.text+0x28c0): dangerous relocation: unsupported relocation
#9 271.7 # /usr/bin/ld: unix.a(unix.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `camlUnix__fun_3162' which may bind externally can not be used when making a shared object; recompile with -fPIC

[dra27]

Ah, this actually seems to be the same underlying issue as affecting #54, so the one fix should deal with them both!

[dra27]

The AFL variant should build again with ocaml/opam-repository#22825.