ERROR while compiling ocaml-base-compiler.4.12.0 on OSX

[M4tsuri]

version infomation:

macOS Big Sur 11.5 (20G71)

$ cc -v
clang version 9.0.1
Target: x86_64-apple-darwin20.6.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm@9/bin

$ opam --version                                                           
2.0.8

error message:

[ERROR] The compilation of ocaml-base-compiler failed at
        "/Users/xxx/.opam/opam-init/hooks/sandbox.sh build make -j1".
∗ installed base-bigarray.base
∗ installed base-threads.base
∗ installed base-unix.base
∗ installed ocaml-options-vanilla.1

#=== ERROR while compiling ocaml-base-compiler.4.12.0 =========================#
# context     2.0.8 | macos/x86_64 |  | https://opam.ocaml.org#1fc79772
# path        ~/.opam/4.12.0/.opam-switch/build/ocaml-base-compiler.4.12.0
# command     ~/.opam/opam-init/hooks/sandbox.sh build make -j1
# exit-code   2
# env-file    ~/.opam/log/ocaml-base-compiler-96279-e7966f.env
# output-file ~/.opam/log/ocaml-base-compiler-96279-e7966f.out
### output ###
# Undefined symbols for architecture x86_64:
# [...]
#   "_caml_weak_get_copy", referenced from:
#       _caml_builtin_cprim in prims.o
#   "_caml_weak_set", referenced from:
#       _caml_builtin_cprim in prims.o
#   "_main", referenced from:
#      implicit entry/start for main executable
# ld: symbol(s) not found for architecture x86_64
# cc: error: linker command failed with exit code 1 (use -v to see invocation)
# make[2]: *** [ocamlrun] Error 1
# make[1]: *** [coldstart] Error 2
# make: *** [world.opt] Error 2



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
┌─ The following actions were aborted
│ ∗ install ocaml        4.12.0
│ ∗ install ocaml-config 2
└─
┌─ The following actions failed
│ λ build ocaml-base-compiler 4.12.0
└─
┌─ The following changes have been performed (the rest was aborted)
│ ∗ install base-bigarray         base
│ ∗ install base-threads          base
│ ∗ install base-unix             base
│ ∗ install ocaml-options-vanilla 1
└─

Thank you.

[mseri]

I cannot reproduce it. Is it by any chance running on a M1 machine in rosetta mode?

[M4tsuri]

Sorry, I found that it's caused by a conflict with binutils. brew unlink binutils and temporarily remove /usr/local/opt/binutils solved it. As mentioned here