ocamlfind 1.8.0 fails on macOS

[nkaretnikov]

macOS 10.14, ocaml and opam installed via brew. Could be a user error since it's the second time I use ocaml.

These commands succeeded:

% brew install ocaml opam
% opam install menhir core

Then tried to install ocamlfind:

% opam install ocamlfind
The following actions will be performed:
  ∗ install ocamlfind 1.8.0

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫 
[ocamlfind.1.8.0] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫 
[ERROR] The compilation of ocamlfind failed at "/Users/nikita/.opam/opam-init/hooks/sandbox.sh build make opt".

#=== ERROR while compiling ocamlfind.1.8.0 ====================================#
# context     2.0.1 | macos/x86_64 | ocaml-system.4.07.0 | https://opam.ocaml.org#7f6dd222
# path        ~/.opam/default/.opam-switch/build/ocamlfind.1.8.0
# command     ~/.opam/opam-init/hooks/sandbox.sh build make opt
# exit-code   2
# env-file    ~/.opam/log/ocamlfind-17295-c61e7b.env
# output-file ~/.opam/log/ocamlfind-17295-c61e7b.out
### output ###
# Undefined symbols for architecture x86_64:
# [...]
#       _caml_program in camlstartupa48c1c.o
#   "_camlFl_topo__frametable", referenced from:
#       _caml_frametable in camlstartupa48c1c.o
#   "_camlFl_topo__gc_roots", referenced from:
#       _caml_globals in camlstartupa48c1c.o
# ld: symbol(s) not found for architecture x86_64
# clang: error: linker command failed with exit code 1 (use -v to see invocation)
# File "caml_startup", line 1:
# Error: Error during linking
# make[1]: *** [ocamlfind_opt] Error 2
# make: *** [opt] Error 2



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫 
┌─ The following actions failed
│ λ build ocamlfind 1.8.0
└─ 
╶─ No changes have been performed

% opam config report
# opam config report
# opam-version      2.0.1 
# self-upgrade      no
# system            arch=x86_64 os=macos os-distribution=homebrew os-version=10.14
# solver            builtin-mccs+glpk
# install-criteria  -removed,-count[version-lag,request],-count[version-lag,changed],-changed
# upgrade-criteria  -removed,-count[version-lag,solution],-new
# jobs              3
# repositories      1 (http) (default repo at 7f6dd222)
# pinned            0
# current-switch    default

[pmetzger]

You might not want to use the system switch (that is to say, a switch which uses the compiler and tools brew provides). Presuming opam is working well enough to create a fresh switch, that might work better for you.

[nkaretnikov]

@pmetzger Thanks for getting back to me quickly!

I hope I correctly understood you, here's what I tried:

% opam switch 4.06.1
% eval $(opam env)
% opam install ocamlfind
The following actions will be performed:
  ∗ install ocaml-base-compiler 4.06.1 [required by ocaml]
  ∗ install ocaml-config        1      [required by ocaml]
  ∗ install ocaml               4.06.1 [required by ocamlfind]
  ∗ install ocamlfind           1.8.0
===== ∗ 4 =====
Do you want to continue? [Y/n] y

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
[ocaml-base-compiler.4.06.1] found in cache
[ocamlfind.1.8.0] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
[ERROR] The compilation of ocaml-base-compiler failed at "/Users/nikita/.opam/opam-init/hooks/sandbox.sh build make world".

#=== ERROR while compiling ocaml-base-compiler.4.06.1 =========================#
# context     2.0.1 | macos/x86_64 |  | https://opam.ocaml.org#7f6dd222
# path        ~/.opam/4.06.1/.opam-switch/build/ocaml-base-compiler.4.06.1
# command     ~/.opam/opam-init/hooks/sandbox.sh build make world
# exit-code   2
# env-file    ~/.opam/log/ocaml-base-compiler-25096-c61e7b.env
# output-file ~/.opam/log/ocaml-base-compiler-25096-c61e7b.out
### output ###
# Undefined symbols for architecture x86_64:
# [...]
#       _caml_builtin_cprim in prims.o
#   "_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
# clang: error: linker command failed with exit code 1 (use -v to see invocation)
# make[1]: *** [ocamlrun] Error 1
# make: *** [coldstart] Error 2



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
┌─ The following actions failed
│ λ build ocaml-base-compiler 4.06.1
└─
╶─ No changes have been performed


% opam switch create 4.07.1

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
[ocaml-base-compiler.4.07.1] downloaded from cache at https://opam.ocaml.org/cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
∗ installed base-bigarray.base
∗ installed base-threads.base
∗ installed base-unix.base
[ERROR] The compilation of ocaml-base-compiler failed at "/Users/nikita/.opam/opam-init/hooks/sandbox.sh build make world".

#=== ERROR while compiling ocaml-base-compiler.4.07.1 =========================#
# context     2.0.1 | macos/x86_64 |  | https://opam.ocaml.org#7f6dd222
# path        ~/.opam/4.07.1/.opam-switch/build/ocaml-base-compiler.4.07.1
# command     ~/.opam/opam-init/hooks/sandbox.sh build make world
# exit-code   2
# env-file    ~/.opam/log/ocaml-base-compiler-27319-ad8886.env
# output-file ~/.opam/log/ocaml-base-compiler-27319-ad8886.out
### output ###
# Undefined symbols for architecture x86_64:
# [...]
#       _caml_builtin_cprim in prims.o
#   "_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
# clang: error: linker command failed with exit code 1 (use -v to see invocation)
# make[1]: *** [ocamlrun] Error 1
# make: *** [coldstart] Error 2



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
┌─ The following actions failed
│ λ build ocaml-base-compiler 4.07.1
└─
┌─ The following changes have been performed (the rest was aborted)
│ ∗ install base-bigarray base
│ ∗ install base-threads  base
│ ∗ install base-unix     base
└─
# Run eval $(opam env) to update the current shell environment
Switch initialisation failed: clean up? ('n' will leave the switch partially installed) [Y/n] y

[pmetzger]

Hrm. This looks bad. On the other hand, I'm not entirely clear on what the cause is. I also run on a mac, but I bootstrap off of MacPorts, and haven't had this problem, but I couldn't tell you offhand what is different. Maybe someone else will have some ideas.

[vogler]

I have the same problem since some update.

[vogler]

Temporarily fixed via brew unlink binutils
ocaml/opam#3650

[github-actions]

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