C library on byte architectures?

[Niols]

Currently, we don't build the C library on byte architecture. Before Dune, we were building it incorrectly. Now we simply don't build it at all. Is there a good reason for that, @yurug?

[Niols]

To reproduce:

• Put your self in a bytecode-only environment. For instance using OPAM:

  • opam switch create 4.04.2+bytecode-only
  • eval $(opam env)
  • Check that you don't have an other annoying ocamlopt with which ocamlopt

• Make sure to have the right dependencies. With OPAM:

  • opam install . --deps-only
  • Menhir will cause a problem. You'll have to:
    • Download the release from https://gitlab.inria.fr/fpottier/menhir/repository/20181113/archive.tar.gz
    • Untar it: tar xf archive.tar.gz && cd menhir-20181113-*
    • Build it: make PREFIX=~/.opam/4.04.2+bytecode-only/ TARGET=byte
    • Install it: make install PREFIX=~/.opam/4.04.2+bytecode-only/ TARGET=byte
    • (Optionnal) Make OPAM believe everything went fine: opam install --fake menhir

• Make Morbig build the C library.

  • Either by checking out on a previous commit: get checkout 69a3f8c,
  • Or by copying src/c/dune.native into src/c/dune.

• Try to build: make

---

dune build @install
      ocamlc src/cstub.exe.o (exit 2)
(cd _build/default && /home/niols/.opam/4.04.2+bytecode-only/bin/ocamlc -w @a-4-29-40-41-42-44-45-48-58-59-60-40 -strict-sequence -strict-formats -short-paths -keep-locs -g -o src/cstub.exe.o -output-complete-obj -I /home/niols/.opam/4.04.2+bytecode-only/lib/biniou -I /home/niols/.opam/4.04.2+bytecode-only/lib/easy-format -I /home/niols/.opam/4.04.2+bytecode-only/lib/menhirLib -I /home/niols/.opam/4.04.2+bytecode-only/lib/ppx_deriving -I /home/niols/.opam/4.04.2+bytecode-only/lib/ppx_deriving_yojson/runtime -I /home/niols/.opam/4.04.2+bytecode-only/lib/result -I /home/niols/.opam/4.04.2+bytecode-only/lib/visitors -I /home/niols/.opam/4.04.2+bytecode-only/lib/yojson -I src /home/niols/.opam/4.04.2+bytecode-only/lib/easy-format/easy_format.cma /home/niols/.opam/4.04.2+bytecode-only/lib/biniou/biniou.cma /home/niols/.opam/4.04.2+bytecode-only/lib/yojson/yojson.cma /home/niols/.opam/4.04.2+bytecode-only/lib/result/result.cma /home/niols/.opam/4.04.2+bytecode-only/lib/ppx_deriving/ppx_deriving_runtime.cma /home/niols/.opam/4.04.2+bytecode-only/lib/ppx_deriving_yojson/runtime/ppx_deriving_yojson_runtime.cma /home/niols/.opam/4.04.2+bytecode-only/lib/visitors/VisitorsRuntime.cma /home/niols/.opam/4.04.2+bytecode-only/lib/ocaml/str.cma /home/niols/.opam/4.04.2+bytecode-only/lib/menhirLib/menhirLib.cmo src/morbig.cma src/CAPI.cma src/.cstub.eobjs/byte/cstub.cmo)
File "_none_", line 1:
Error: Cannot overwrite existing file /tmp/camlobj407363.c
make: *** [Makefile:12: build] Error 1