Cannot install it on mac

[the-man-with-a-golden-mind]

Hi I cannot install ocaml-leveldb on any of my macs (version 10.15.6). Error: "The packages you requested declare the following system dependencies. Please make sure they are installed before retrying: leveldb"

I have installed leveldb. I am using it with success with Rust for example. So it is not the issue of missing leveldb lib.

Best,

Michal

[zapashcanon]

@the-man-with-a-golden-mind, with the latest version (published on opam) it should work, can you confirm ?

@mfp I believe this can be closed.

[charlesetc]

I think I am having this problem too. Leveldb is installed with brew install leveldb --build-from-source building successfully. I'm not sure where that exactly puts the files but I found some in /opt/homebrew/lib (maybe this is a red herring):

$ ls /opt/homebrew/lib | grep level
libleveldb.1.23.0.dylib
libleveldb.1.dylib
libleveldb.a
libleveldb.dylib

Then opam install leveldb fails with:

<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫 
┌─ The following actions failed
│ λ build conf-leveldb 1
└─ 
╶─ No changes have been performed

The packages you requested declare the following system dependencies. Please make sure they are installed before retrying:
    leveldb

I also tried cloning this repository and running opam pin leveldb . within it but got the same error. Also tried adding various paths to the LD_LIBRARY_PATH without success. I'm on an M1 mac, not sure if that is relevant.

Thanks for any help!

[zapashcanon]

If you clone this repository and then run dune build @all && dune install doest it work ?

The opam error comes from the conf-leveldb package which is probably not looking in the correct place.

EDIT: I mentioned you in an opam issue which seems related and will probably help you.

[charlesetc]

Nope :/ It fails with the following:

$ dune build @all && dune install
          cc src/leveldb_stubs.o (exit 1)
(cd _build/default/src && /usr/bin/cc -O2 -fno-strict-aliasing -fwrapv -g -I /Users/charleschamberlain/.opam/default/lib/ocaml -I /Users/charleschamberlain/.opam/default/lib/ocaml/threads -o leveldb_stubs.o -c leveldb_stubs.cc)
leveldb_stubs.cc:20:10: fatal error: 'leveldb/db.h' file not found
#include <leveldb/db.h>
         ^~~~~~~~~~~~~~
1 error generated.

Edit: Ah just saw your edit — sounds great, thanks!

[thangngoc89]

Related: https://github.com/ocaml/opam-repository/issues/18167#issuecomment-885459238