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View Code? Open in Web Editor NEWOCaml bindings for Google's LevelDB
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besport xandkar jsgf williamleferrand gregorypotdevin julian1 vbmithr chambart davidalphafox pveber zapashcanon kit-ty-kate thangngoc89 moyodialloocaml-leveldb's Issues
build and install *.cmxs
Error installing from opam
Hi,
I am not sure if that's something that should be filed to the OPAM guys, but currently it's impossible to install ocaml-leveldb from opam. This is the error I am getting:
=-=-= Installing leveldb.1.0.2 =-=-=
default Downloading https://opam.ocaml.org/archives/leveldb.1.0.2+opam.tar.gz
Downloading https://opam.ocaml.org/archives/leveldb.1.0.2+opam.tar.gz
Applying link_against_extra_libs.patch.
Building leveldb.1.0.2:
omake -j9
omake install prefix=/Users/sergi/.opam/4.01.0dev+trunk
[ERROR] The compilation of leveldb.1.0.2 failed.
Removing leveldb.1.0.2.
ocamlfind remove leveldb
===== ERROR while installing leveldb.1.0.2 =====
# opam-version 1.1.1
# os darwin
# command omake -j9
# path /Users/sergi/.opam/4.01.0dev+trunk/build/leveldb.1.0.2
# compiler 4.01.0dev+trunk
# exit-code 1
# env-file /Users/sergi/.opam/4.01.0dev+trunk/build/leveldb.1.0.2/leveldb-12555-2dea01.env
# stdout-file /Users/sergi/.opam/4.01.0dev+trunk/build/leveldb.1.0.2/leveldb-12555-2dea01.out
# stderr-file /Users/sergi/.opam/4.01.0dev+trunk/build/leveldb.1.0.2/leveldb-12555-2dea01.err
### stdout ###
# ...[truncated]
# --- Checking for ocamlopt.opt... (found /Users/sergi/.opam/4.01.0dev+trunk/bin/ocamlopt.opt)
# --- Checking whether ocamlc understands the "z" warnings... (yes)
# *** omake: finished reading OMakefiles (0.09 sec)
# --- Checking for gcc... (found /usr/bin/gcc)
# --- Checking for g++... (found /usr/bin/g++)
# --- Checking if ocamldep understands -modules... (yes)
# - scan src leveldb_stubs.o
# + g++ -I. -MM leveldb_stubs.cc
# *** omake: 36/61 targets are up to date
# *** omake: failed (0.31 sec, 6/6 scans, 4/4 rules, 24/129 digests)
### stderr ###
# leveldb_stubs.cc:26:10: fatal error: 'caml/mlvalues.h' file not found
# #include <caml/mlvalues.h>
# ^
#1 error generated.
# *** omake: targets were not rebuilt because of errors:
# <scanner src/leveldb_stubs.o>
# depends on: src/leveldb_stubs.cc
Thanks a lot.
Bytes / string issues with OCaml 4.06.1
I tried to install leveldb via OPAM for OCaml 4.06.1. In OPAM, the leveldb version is 1.1.2.
There are compilation errors that appear to be type mismatches between the bytes and string types in several places.
I started to patch these by hand, changing everything to bytes, not sure if that will work.
I compiled leveldb 1.2 by hand with OCaml 4.06.1, that works fine. So probably the fix is just to update the OPAM package.
The binding uses some naked pointers
More general key-val?
Since LevelDB says that ”Keys and values are arbitrary byte arrays.”, I was wondering whether general (marshallable) values are possible. The idea is to have a functor to "generate" the type specialized functions:
module Make : functor (T : sig type key type value end) -> sig
type db
...
val get : db -> T.key -> T.value option
...
end
(The db type is not shared between generated modules to avoid calling different get function on it.)
Cannot install it on mac
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
Missing dependency: "Reference to undefined global `Thread'`"
ubuntu@ip-172-30-1-130:~$ ocaml
OCaml version 4.04.2
Findlib has been successfully loaded. Additional directives:
<snip>
# #require "leveldb";;
/home/ubuntu/.opam/tezos/lib/leveldb: added to search path
# #require "leveldb";;os/lib/leveldb/leveldb.cma: loaded
Error: Reference to undefined global `Thread'
#
ubuntu@ip-172-30-1-130:~$ cat .ocamlinit
(* Added by OPAM. *)
let () =
try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
with Not_found -> ()
;;
(* ## added by OPAM user-setup for ocamltop / base ## 3ec62baf6f9c219ae06d9814069da862 ## you can edit, but keep this line *)
#use "topfind";;
(* ## end of OPAM user-setup addition for ocamltop / base ## keep this line *)
Error during linking
ocaml pkg/build.ml native=true native-dynlink=true
ocamlfind ocamlopt -linkpkg -g -thread -package core -package leveldb -package scid lib/tick.cmx src/ldb_browser.cmx -o src/ldb_browser.native
+ ocamlfind ocamlopt -linkpkg -g -thread -package core -package leveldb -package scid lib/tick.cmx src/ldb_browser.cmx -o src/ldb_browser.native
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_open_native':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:329: undefined reference to `leveldb::DB::Open(leveldb::Options const&, std::string const&, leveldb::DB**)'
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:330: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_destroy':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:357: undefined reference to `leveldb::DestroyDB(std::string const&, leveldb::Options const&)'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_repair':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:368: undefined reference to `leveldb::RepairDB(std::string const&, leveldb::Options const&)'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_get':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:409: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_put':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:436: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_delete':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:461: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_mem':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:486: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o): In function `ldb_it_key_unsafe':
/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:623: undefined reference to `leveldb::Status::ToString() const'
/home/vb/.opam/4.02.3/lib/leveldb/libcamlleveldb.a(leveldb_stubs.o):/home/vb/.opam/4.02.3/build/leveldb.1.1.0/src/leveldb_stubs.c:646: more undefined references to `leveldb::Status::ToString() const' follow
collect2: error: ld returned 1 exit status
File "caml_startup", line 1:
Error: Error during linking
compilation error
Hi,
Thanks for this project first of all. I have a compilation issue:
*** omake: reading OMakefiles
*** omake: finished reading OMakefiles (0.02 sec)
- build src leveldb_stubs.o
- ocamlc -cc g++ -ccopt -g -ccopt -Wall -ccopt -O2 -ccopt -fPIC -ccopt -pthread -c leveldb_stubs.c
leveldb_stubs.c:20:24: fatal error: leveldb/db.h : No such file or directory
compilation ended
*** omake: 29/71 targets are up to date
*** omake: failed (0.07 sec, 0/1 scans, 1/1 rules, 0/106 digests)
*** omake: targets were not rebuilt because of errors:
src/leveldb_stubs.o
depends on: src/leveldb_stubs.c
depends on: src/leveldb_stubs.cc
The dependencies mentioned here are obviously satisfied, and I have installed all 4 requirements.
bigstring support
Would be nice to have this code functorized over either bytes / bigstrings.
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