[Caml-list] Beginner - Cannot set up Core and Batteries

[Caml-list] Beginner - Cannot set up Core and Batteries

[Kovács Roland]

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Hello Everyone!

I'm completely new to OCaml, but I've read that it's a good practice to 
start by having both Batteries and the Core module installed.
I'm using Ubuntu 16.04, and installed ocaml, opam, utop from the 
official PPAs as it seemed that the one provided for Ubuntu (|avsm/ppa) 
is not working for 16.04!

After installation I did opam init, and all the setups it asked me to 
do. In my .ocamlinit file I have what I've found as a fix for the error 
'unbound module'.
For one time utop found the modules, but since then it gives me an error.


|Cheers,
Roland
|||--------------------------------------------------------------------
||Judging by the output of opam, the packages should be installed 
correctly :

$ opam list
# Installed packages for system:
base-bigarray            base  Bigarray library distributed with the 
OCaml compi
base-bytes               base  Bytes library distributed with the OCaml 
compiler
base-ocamlbuild          base  OCamlbuild binary and libraries 
distributed with
base-threads             base  Threads library distributed with the 
OCaml compil
base-unix                base  Unix library distributed with the OCaml 
compiler
batteries               2.5.2  a community-maintained standard library 
extension
bin_prot            113.33.03  A binary protocol generator
cmdliner                0.9.8  Declarative definition of command line 
interfaces
conf-m4                     1  Virtual package relying on m4
core                113.33.03  Industrial strength alternative to 
OCaml's standa
core_kernel         113.33.03  Industrial strength alternative to 
OCaml's standa
cppo                    1.3.2  Equivalent of the C preprocessor for 
OCaml progra
depext                  1.0.1  Query and install external dependencies 
of OPAM p
fieldslib           113.33.03  Syntax extension to define first class 
values rep
js-build-tools      113.33.04  Collection of tools to help building Jane 
Street
ocamlbuild                  0  Build system distributed with the OCaml 
compiler
ocamlfind               1.6.2  A library manager for OCaml
ppx_assert          113.33.03  Assert-like extension nodes that raise 
useful err
ppx_bench           113.33.03  Syntax extension for writing in-line 
benchmarks i
ppx_bin_prot        113.33.03  Generation of bin_prot readers and 
writers from t
ppx_compare         113.33.03  Generation of comparison functions from types
ppx_core            113.33.03  Standard library for ppx rewriters
ppx_custom_printf   113.33.03  Printf-style format-strings for 
user-defined stri
ppx_deriving              4.0  Type-driven code generation for OCaml >=4.02
ppx_driver          113.33.03  Feature-full driver for OCaml AST 
transformers
ppx_enumerate       113.33.03  Generate a list containing all values of 
a finite
ppx_expect          113.33.03  Cram like framework for OCaml
ppx_fail            113.33.03  Add location to calls to failwiths
ppx_fields_conv     113.33.03  Generation of accessor and iteration 
functions fo
ppx_here            113.33.03  Expands [%here] into its location
ppx_inline_test     113.33.03  Syntax extension for writing in-line 
tests in oca
ppx_jane            113.33.03  Standard Jane Street ppx rewriters
ppx_let             113.33.03  Monadic let-bindings
ppx_optcomp         113.33.03  Optional compilation for OCaml
ppx_pipebang        113.33.03  A ppx rewriter that inlines reverse 
application o
ppx_sexp_conv       113.33.03  Generation of S-expression conversion 
functions f
ppx_sexp_message    113.33.03  A ppx rewriter for easy construction of 
s-express
ppx_sexp_value      113.33.03  A ppx rewriter that simplifies building 
s-express
ppx_tools          5.0+4.02.0  Tools for authors of ppx rewriters and 
other synt
ppx_type_conv       113.33.03  Support Library for type-driven code 
generators
ppx_typerep_conv    113.33.03  Generation of runtime types from type 
declaration
ppx_variants_conv   113.33.03  Generation of accessor and iteration 
functions fo
re                      1.6.1  RE is a regular expression library for OCaml
result                    1.2  Compatibility Result module
sexplib             113.33.03  Library for serializing OCaml values to 
and from
typerep             113.33.03  typerep is a library for runtime types.
variantslib         113.33.03  Part of Jane Street's Core library

|
||--------------------------------------------------------------------
|My .ocmalinit :

||#use "topfind";;
#thread;;
#camlp4o;;
#require "core.std";;
#require "core.syntax";;
#require "batteries";;

let () =
   try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
   with Not_found -> ()
;||;

--------------------------------------------------------------------
What ocaml prints :

$ ocaml
                        OCaml version 4.02.3
Findlib has been successfully loaded. Additional directives:
   #require "package";;      to load a package
   #list;;                   to list the available packages
   #camlp4o;;                to load camlp4 (standard syntax)
   #camlp4r;;                to load camlp4 (revised syntax)
   #predicates "p,q,...";;   to set these predicates
   Topfind.reset();;         to force that packages will be reloaded
   #thread;;                 to enable threads

/usr/lib/ocaml/threads: added to search path
/usr/lib/ocaml/unix.cma: loaded
/usr/lib/ocaml/threads/threads.cma: loaded
/usr/lib/ocaml/dynlink.cma: loaded
/usr/lib/ocaml/camlp4: added to search path
/usr/lib/ocaml/camlp4/camlp4o.cma: loaded
No such package: core.std
/home/zen3ger/.opam/system/lib/core: added to search path
/usr/lib/ocaml/nums.cma: loaded
/home/zen3ger/.opam/system/lib/num-top: added to search path
/home/zen3ger/.opam/system/lib/num-top/num_top.cma: loaded
     Camlp4 Parsing version 4.02.3

/home/zen3ger/.opam/system/lib/num: added to search path
/usr/lib/ocaml/bigarray.cma: loaded
/usr/lib/ocaml/str.cma: loaded
/home/zen3ger/.opam/system/lib/bytes: added to search path
/home/zen3ger/.opam/system/lib/batteries: added to search path
/home/zen3ger/.opam/system/lib/batteries/batteries.cma: loaded
/home/zen3ger/.opam/system/lib/batteries/batteriesConfig.cmo: loaded
/home/zen3ger/.opam/system/lib/batteries/batteriesHelp.cmo: loaded
/home/zen3ger/.opam/system/lib/batteries/batteriesPrint.cmo: loaded
/home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
/home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded

|
||--------------------------------------------------------------------
What utop prints :

Findlib has been successfully loaded. Additional directives:
   #require "package";;      to load a package
   #list;;                   to list the available packages
   #camlp4o;;                to load camlp4 (standard syntax)
   #camlp4r;;                to load camlp4 (revised syntax)
   #predicates "p,q,...";;   to set these predicates
   Topfind.reset();;         to force that packages will be reloaded
   #thread;;                 to enable threads

No such package: core.std
No such package: core.syntax
No such package: batteries

||

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Re: [Caml-list] Beginner - Cannot set up Core and Batteries

[Kakadu]

Can you try the same without line about `camlp4` in your ~/.ocamlinit
file? It is very likely that you will not need it at all because
modern versions of libraries doesn't require it anymore.

Also, I can recommend you to compile ocaml locally using `opam switch
4.02.3 && eval $(opam config env)` command.

kakadu





On Wed, Aug 10, 2016 at 8:52 AM, Kovács Roland <zen3ger@gmail.com> wrote:
> Hello Everyone!
>
> I'm completely new to OCaml, but I've read that it's a good practice to
> start by having both Batteries and the Core module installed.
> I'm using Ubuntu 16.04, and installed ocaml, opam, utop from the official
> PPAs as it seemed that the one provided for Ubuntu (avsm/ppa) is not working
> for 16.04!
>
> After installation I did opam init, and all the setups it asked me to do. In
> my .ocamlinit file I have what I've found as a fix for the error 'unbound
> module'.
> For one time utop found the modules, but since then it gives me an error.
>
>
> Cheers,
> Roland
> --------------------------------------------------------------------
> Judging by the output of opam, the packages should be installed correctly :
>
> $ opam list
> # Installed packages for system:
> base-bigarray            base  Bigarray library distributed with the OCaml
> compi
> base-bytes               base  Bytes library distributed with the OCaml
> compiler
> base-ocamlbuild          base  OCamlbuild binary and libraries distributed
> with
> base-threads             base  Threads library distributed with the OCaml
> compil
> base-unix                base  Unix library distributed with the OCaml
> compiler
> batteries               2.5.2  a community-maintained standard library
> extension
> bin_prot            113.33.03  A binary protocol generator
> cmdliner                0.9.8  Declarative definition of command line
> interfaces
> conf-m4                     1  Virtual package relying on m4
> core                113.33.03  Industrial strength alternative to OCaml's
> standa
> core_kernel         113.33.03  Industrial strength alternative to OCaml's
> standa
> cppo                    1.3.2  Equivalent of the C preprocessor for OCaml
> progra
> depext                  1.0.1  Query and install external dependencies of
> OPAM p
> fieldslib           113.33.03  Syntax extension to define first class values
> rep
> js-build-tools      113.33.04  Collection of tools to help building Jane
> Street
> ocamlbuild                  0  Build system distributed with the OCaml
> compiler
> ocamlfind               1.6.2  A library manager for OCaml
> ppx_assert          113.33.03  Assert-like extension nodes that raise useful
> err
> ppx_bench           113.33.03  Syntax extension for writing in-line
> benchmarks i
> ppx_bin_prot        113.33.03  Generation of bin_prot readers and writers
> from t
> ppx_compare         113.33.03  Generation of comparison functions from types
> ppx_core            113.33.03  Standard library for ppx rewriters
> ppx_custom_printf   113.33.03  Printf-style format-strings for user-defined
> stri
> ppx_deriving              4.0  Type-driven code generation for OCaml >=4.02
> ppx_driver          113.33.03  Feature-full driver for OCaml AST
> transformers
> ppx_enumerate       113.33.03  Generate a list containing all values of a
> finite
> ppx_expect          113.33.03  Cram like framework for OCaml
> ppx_fail            113.33.03  Add location to calls to failwiths
> ppx_fields_conv     113.33.03  Generation of accessor and iteration
> functions fo
> ppx_here            113.33.03  Expands [%here] into its location
> ppx_inline_test     113.33.03  Syntax extension for writing in-line tests in
> oca
> ppx_jane            113.33.03  Standard Jane Street ppx rewriters
> ppx_let             113.33.03  Monadic let-bindings
> ppx_optcomp         113.33.03  Optional compilation for OCaml
> ppx_pipebang        113.33.03  A ppx rewriter that inlines reverse
> application o
> ppx_sexp_conv       113.33.03  Generation of S-expression conversion
> functions f
> ppx_sexp_message    113.33.03  A ppx rewriter for easy construction of
> s-express
> ppx_sexp_value      113.33.03  A ppx rewriter that simplifies building
> s-express
> ppx_tools          5.0+4.02.0  Tools for authors of ppx rewriters and other
> synt
> ppx_type_conv       113.33.03  Support Library for type-driven code
> generators
> ppx_typerep_conv    113.33.03  Generation of runtime types from type
> declaration
> ppx_variants_conv   113.33.03  Generation of accessor and iteration
> functions fo
> re                      1.6.1  RE is a regular expression library for OCaml
> result                    1.2  Compatibility Result module
> sexplib             113.33.03  Library for serializing OCaml values to and
> from
> typerep             113.33.03  typerep is a library for runtime types.
> variantslib         113.33.03  Part of Jane Street's Core library
>
>
> --------------------------------------------------------------------
> My .ocmalinit :
>
> #use "topfind";;
> #thread;;
> #camlp4o;;
> #require "core.std";;
> #require "core.syntax";;
> #require "batteries";;
>
> let () =
>   try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
>   with Not_found -> ()
> ;;
>
> --------------------------------------------------------------------
> What ocaml prints :
>
> $ ocaml
>                        OCaml version 4.02.3
> Findlib has been successfully loaded. Additional directives:
>   #require "package";;      to load a package
>   #list;;                   to list the available packages
>   #camlp4o;;                to load camlp4 (standard syntax)
>   #camlp4r;;                to load camlp4 (revised syntax)
>   #predicates "p,q,...";;   to set these predicates
>   Topfind.reset();;         to force that packages will be reloaded
>   #thread;;                 to enable threads
>
> /usr/lib/ocaml/threads: added to search path
> /usr/lib/ocaml/unix.cma: loaded
> /usr/lib/ocaml/threads/threads.cma: loaded
> /usr/lib/ocaml/dynlink.cma: loaded
> /usr/lib/ocaml/camlp4: added to search path
> /usr/lib/ocaml/camlp4/camlp4o.cma: loaded
> No such package: core.std
> /home/zen3ger/.opam/system/lib/core: added to search path
> /usr/lib/ocaml/nums.cma: loaded
> /home/zen3ger/.opam/system/lib/num-top: added to search path
> /home/zen3ger/.opam/system/lib/num-top/num_top.cma: loaded
>     Camlp4 Parsing version 4.02.3
>
> /home/zen3ger/.opam/system/lib/num: added to search path
> /usr/lib/ocaml/bigarray.cma: loaded
> /usr/lib/ocaml/str.cma: loaded
> /home/zen3ger/.opam/system/lib/bytes: added to search path
> /home/zen3ger/.opam/system/lib/batteries: added to search path
> /home/zen3ger/.opam/system/lib/batteries/batteries.cma: loaded
> /home/zen3ger/.opam/system/lib/batteries/batteriesConfig.cmo: loaded
> /home/zen3ger/.opam/system/lib/batteries/batteriesHelp.cmo: loaded
> /home/zen3ger/.opam/system/lib/batteries/batteriesPrint.cmo: loaded
> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
>
>
> --------------------------------------------------------------------
> What utop prints :
>
> Findlib has been successfully loaded. Additional directives:
>   #require "package";;      to load a package
>   #list;;                   to list the available packages
>   #camlp4o;;                to load camlp4 (standard syntax)
>   #camlp4r;;                to load camlp4 (revised syntax)
>   #predicates "p,q,...";;   to set these predicates
>   Topfind.reset();;         to force that packages will be reloaded
>   #thread;;                 to enable threads
>
> No such package: core.std
> No such package: core.syntax
> No such package: batteries
>

Re: [Caml-list] Beginner - Cannot set up Core and Batteries

[Kakadu]

It seems that you have done `opam switch` and now some packages are
not installed. (I.e. opam doesn't look for packages installled in
/usr/lib anymore.) So, toplevel gives you an error about unknown
topfind.

It's likely  that `opam install core batteries utop` will fix that.

But it is a little bit strange that utop still prints the same. It is
likely that you have a little bit dirty environment. You can try to
reopen terminal and try again and see that result differs. Don't
forget to do `eval $(opam config env)` at the beginnning!

Kakadu

On Wed, Aug 10, 2016 at 1:48 PM, Kovács Roland <zen3ger@gmail.com> wrote:
> Hi!
>
> Thans for the tip!
>
> I've tried and utop still prints exactly the same, and it still imports
> camlp4, while ocaml prints another error now:
>
> $ ocaml
>         OCaml version 4.02.3
>
> Cannot find file topfind.
> Unknown directive `thread'.
>
> Roland
>
>
> 2016-08-10 12:19 keltezéssel, Kakadu írta:
>>
>> Can you try the same without line about `camlp4` in your ~/.ocamlinit
>> file? It is very likely that you will not need it at all because
>> modern versions of libraries doesn't require it anymore.
>>
>> Also, I can recommend you to compile ocaml locally using `opam switch
>> 4.02.3 && eval $(opam config env)` command.
>>
>> kakadu
>>
>>
>>
>>
>>
>> On Wed, Aug 10, 2016 at 8:52 AM, Kovács Roland <zen3ger@gmail.com> wrote:
>>>
>>> Hello Everyone!
>>>
>>> I'm completely new to OCaml, but I've read that it's a good practice to
>>> start by having both Batteries and the Core module installed.
>>> I'm using Ubuntu 16.04, and installed ocaml, opam, utop from the official
>>> PPAs as it seemed that the one provided for Ubuntu (avsm/ppa) is not
>>> working
>>> for 16.04!
>>>
>>> After installation I did opam init, and all the setups it asked me to do.
>>> In
>>> my .ocamlinit file I have what I've found as a fix for the error 'unbound
>>> module'.
>>> For one time utop found the modules, but since then it gives me an error.
>>>
>>>
>>> Cheers,
>>> Roland
>>> --------------------------------------------------------------------
>>> Judging by the output of opam, the packages should be installed correctly
>>> :
>>>
>>> $ opam list
>>> # Installed packages for system:
>>> base-bigarray            base  Bigarray library distributed with the
>>> OCaml
>>> compi
>>> base-bytes               base  Bytes library distributed with the OCaml
>>> compiler
>>> base-ocamlbuild          base  OCamlbuild binary and libraries
>>> distributed
>>> with
>>> base-threads             base  Threads library distributed with the OCaml
>>> compil
>>> base-unix                base  Unix library distributed with the OCaml
>>> compiler
>>> batteries               2.5.2  a community-maintained standard library
>>> extension
>>> bin_prot            113.33.03  A binary protocol generator
>>> cmdliner                0.9.8  Declarative definition of command line
>>> interfaces
>>> conf-m4                     1  Virtual package relying on m4
>>> core                113.33.03  Industrial strength alternative to OCaml's
>>> standa
>>> core_kernel         113.33.03  Industrial strength alternative to OCaml's
>>> standa
>>> cppo                    1.3.2  Equivalent of the C preprocessor for OCaml
>>> progra
>>> depext                  1.0.1  Query and install external dependencies of
>>> OPAM p
>>> fieldslib           113.33.03  Syntax extension to define first class
>>> values
>>> rep
>>> js-build-tools      113.33.04  Collection of tools to help building Jane
>>> Street
>>> ocamlbuild                  0  Build system distributed with the OCaml
>>> compiler
>>> ocamlfind               1.6.2  A library manager for OCaml
>>> ppx_assert          113.33.03  Assert-like extension nodes that raise
>>> useful
>>> err
>>> ppx_bench           113.33.03  Syntax extension for writing in-line
>>> benchmarks i
>>> ppx_bin_prot        113.33.03  Generation of bin_prot readers and writers
>>> from t
>>> ppx_compare         113.33.03  Generation of comparison functions from
>>> types
>>> ppx_core            113.33.03  Standard library for ppx rewriters
>>> ppx_custom_printf   113.33.03  Printf-style format-strings for
>>> user-defined
>>> stri
>>> ppx_deriving              4.0  Type-driven code generation for OCaml
>>> >=4.02
>>> ppx_driver          113.33.03  Feature-full driver for OCaml AST
>>> transformers
>>> ppx_enumerate       113.33.03  Generate a list containing all values of a
>>> finite
>>> ppx_expect          113.33.03  Cram like framework for OCaml
>>> ppx_fail            113.33.03  Add location to calls to failwiths
>>> ppx_fields_conv     113.33.03  Generation of accessor and iteration
>>> functions fo
>>> ppx_here            113.33.03  Expands [%here] into its location
>>> ppx_inline_test     113.33.03  Syntax extension for writing in-line tests
>>> in
>>> oca
>>> ppx_jane            113.33.03  Standard Jane Street ppx rewriters
>>> ppx_let             113.33.03  Monadic let-bindings
>>> ppx_optcomp         113.33.03  Optional compilation for OCaml
>>> ppx_pipebang        113.33.03  A ppx rewriter that inlines reverse
>>> application o
>>> ppx_sexp_conv       113.33.03  Generation of S-expression conversion
>>> functions f
>>> ppx_sexp_message    113.33.03  A ppx rewriter for easy construction of
>>> s-express
>>> ppx_sexp_value      113.33.03  A ppx rewriter that simplifies building
>>> s-express
>>> ppx_tools          5.0+4.02.0  Tools for authors of ppx rewriters and
>>> other
>>> synt
>>> ppx_type_conv       113.33.03  Support Library for type-driven code
>>> generators
>>> ppx_typerep_conv    113.33.03  Generation of runtime types from type
>>> declaration
>>> ppx_variants_conv   113.33.03  Generation of accessor and iteration
>>> functions fo
>>> re                      1.6.1  RE is a regular expression library for
>>> OCaml
>>> result                    1.2  Compatibility Result module
>>> sexplib             113.33.03  Library for serializing OCaml values to
>>> and
>>> from
>>> typerep             113.33.03  typerep is a library for runtime types.
>>> variantslib         113.33.03  Part of Jane Street's Core library
>>>
>>>
>>> --------------------------------------------------------------------
>>> My .ocmalinit :
>>>
>>> #use "topfind";;
>>> #thread;;
>>> #camlp4o;;
>>> #require "core.std";;
>>> #require "core.syntax";;
>>> #require "batteries";;
>>>
>>> let () =
>>>    try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
>>>    with Not_found -> ()
>>> ;;
>>>
>>> --------------------------------------------------------------------
>>> What ocaml prints :
>>>
>>> $ ocaml
>>>                         OCaml version 4.02.3
>>> Findlib has been successfully loaded. Additional directives:
>>>    #require "package";;      to load a package
>>>    #list;;                   to list the available packages
>>>    #camlp4o;;                to load camlp4 (standard syntax)
>>>    #camlp4r;;                to load camlp4 (revised syntax)
>>>    #predicates "p,q,...";;   to set these predicates
>>>    Topfind.reset();;         to force that packages will be reloaded
>>>    #thread;;                 to enable threads
>>>
>>> /usr/lib/ocaml/threads: added to search path
>>> /usr/lib/ocaml/unix.cma: loaded
>>> /usr/lib/ocaml/threads/threads.cma: loaded
>>> /usr/lib/ocaml/dynlink.cma: loaded
>>> /usr/lib/ocaml/camlp4: added to search path
>>> /usr/lib/ocaml/camlp4/camlp4o.cma: loaded
>>> No such package: core.std
>>> /home/zen3ger/.opam/system/lib/core: added to search path
>>> /usr/lib/ocaml/nums.cma: loaded
>>> /home/zen3ger/.opam/system/lib/num-top: added to search path
>>> /home/zen3ger/.opam/system/lib/num-top/num_top.cma: loaded
>>>      Camlp4 Parsing version 4.02.3
>>>
>>> /home/zen3ger/.opam/system/lib/num: added to search path
>>> /usr/lib/ocaml/bigarray.cma: loaded
>>> /usr/lib/ocaml/str.cma: loaded
>>> /home/zen3ger/.opam/system/lib/bytes: added to search path
>>> /home/zen3ger/.opam/system/lib/batteries: added to search path
>>> /home/zen3ger/.opam/system/lib/batteries/batteries.cma: loaded
>>> /home/zen3ger/.opam/system/lib/batteries/batteriesConfig.cmo: loaded
>>> /home/zen3ger/.opam/system/lib/batteries/batteriesHelp.cmo: loaded
>>> /home/zen3ger/.opam/system/lib/batteries/batteriesPrint.cmo: loaded
>>> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
>>> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
>>>
>>>
>>> --------------------------------------------------------------------
>>> What utop prints :
>>>
>>> Findlib has been successfully loaded. Additional directives:
>>>    #require "package";;      to load a package
>>>    #list;;                   to list the available packages
>>>    #camlp4o;;                to load camlp4 (standard syntax)
>>>    #camlp4r;;                to load camlp4 (revised syntax)
>>>    #predicates "p,q,...";;   to set these predicates
>>>    Topfind.reset();;         to force that packages will be reloaded
>>>    #thread;;                 to enable threads
>>>
>>> No such package: core.std
>>> No such package: core.syntax
>>> No such package: batteries
>>>
>

Re: [Caml-list] Beginner - Cannot set up Core and Batteries

[Kakadu]

Roland,

Please use  button `Reply to all` instead of `Reply`.
You don't need to change distro, you need just to spend some time for
configuration.  For example, you can put
eval `opam config env`
to your ~/.bashrc and opam will be should configured well on every new tterminal

Btw, I managed to load core to toplevel. Look what I have typed
manually and put this in your ~/.ocamlinit file. N.B. `-no-init`
switch forbids toplevel `ocaml` to read ~/.ocamlinit. After that I
think that both `ocaml` and `utop` will work.

Happy hacking,
Kakadu

$ ocaml -noinit
        OCaml version 4.02.3


# #use "topfind";;
- : unit = ()
Findlib has been successfully loaded. Additional directives:
  #require "package";;      to load a package
  #list;;                   to list the available packages
  #camlp4o;;                to load camlp4 (standard syntax)
  #camlp4r;;                to load camlp4 (revised syntax)
  #predicates "p,q,...";;   to set these predicates
  Topfind.reset();;         to force that packages will be reloaded
  #thread;;                 to enable threads

- : unit = ()
# #thread;;
/home/kakadu/.opam/4.02.3/lib/ocaml/threads: added to search path
/home/kakadu/.opam/4.02.3/lib/ocaml/unix.cma: loaded
/home/kakadu/.opam/4.02.3/lib/ocaml/threads/threads.cma: loaded
# #require "core.top";;
/home/kakadu/.opam/4.02.3/lib/ocaml/bigarray.cma: loaded
/home/kakadu/.opam/4.02.3/lib/bin_prot: added to search path
/home/kakadu/.opam/4.02.3/lib/bin_prot/bin_prot.cma: loaded
/home/kakadu/.opam/4.02.3/lib/custom_printf: added to search path
/home/kakadu/.opam/4.02.3/lib/custom_printf/custom_printf.cma: loaded
/home/kakadu/.opam/4.02.3/lib/variantslib: added to search path
/home/kakadu/.opam/4.02.3/lib/variantslib/variantslib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/sexplib: added to search path
/home/kakadu/.opam/4.02.3/lib/sexplib/sexplib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/enumerate: added to search path
/home/kakadu/.opam/4.02.3/lib/fieldslib: added to search path
/home/kakadu/.opam/4.02.3/lib/fieldslib/fieldslib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/pa_bench: added to search path
/home/kakadu/.opam/4.02.3/lib/pa_bench/pa_bench_lib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/pa_ounit: added to search path
/home/kakadu/.opam/4.02.3/lib/pa_ounit/pa_ounit_lib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/pa_test: added to search path
/home/kakadu/.opam/4.02.3/lib/pa_test/pa_test_lib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/typerep_lib: added to search path
/home/kakadu/.opam/4.02.3/lib/typerep_lib/typerep_lib.cma: loaded
/home/kakadu/.opam/4.02.3/lib/core_kernel: added to search path
/home/kakadu/.opam/4.02.3/lib/core_kernel/core_kernel.cma: loaded
/home/kakadu/.opam/4.02.3/lib/sexplib_unix: added to search path
/home/kakadu/.opam/4.02.3/lib/sexplib_unix/sexplib_unix.cma: loaded
/home/kakadu/.opam/4.02.3/lib/pa_structural_sexp: added to search path
/home/kakadu/.opam/4.02.3/lib/pa_structural_sexp/pa_structural_sexp_lib.cma:
loaded
/home/kakadu/.opam/4.02.3/lib/core: added to search path
/home/kakadu/.opam/4.02.3/lib/core/core.cma: loaded
/home/kakadu/.opam/4.02.3/lib/core/core_top.cma: loaded
/home/kakadu/.opam/4.02.3/lib/core/core_top.cma: loaded
# open Core.Std;;
#

On Wed, Aug 10, 2016 at 2:36 PM, Kovács Roland <zen3ger@gmail.com> wrote:
> I've removed the utop installed by apt, then did `opam install core
> batteries utop` and `eval $(opam config env)`.
>
> The given errors might be a bug, as now neither utop and ocaml throws an
> error when I type `open Core.Std;;` (it's even shown in the suggestions in
> utop).
>
> But now in every terminal session I have to do `eval $(opam config env)`
> before I can start using utop.
>
> Is there a different Linux distro which supports OCaml well, so it's much
> simpler to set up? I don't mind distro hopping.
>
> Roland
>
> -------------------------------------------------------------------------------------------
>
> My .ocamlinit now is :
>
> $ cat .ocamlinit
> #use "topfind";;
> #thread;;
> #require "core.std";;
> #require "core.syntax";;
> #require "batteries";;
>
> let () =
>   try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
>   with Not_found -> ()
> ;;
> -------------------------------------------------------------------------------------------
>
> Utop still imports camlp4, and can't find core.std
>
> $ utop
> ────┬──────────────────────────────────────────────────┬────────
>         │ Welcome to utop version 1.19.2 (using OCaml version 4.02.3)!│
> └──────────────────────────────────────────────────┘
> Findlib has been successfully loaded. Additional directives:
>   #require "package";;      to load a package
>   #list;;                   to list the available packages
>   #camlp4o;;                to load camlp4 (standard syntax)
>   #camlp4r;;                to load camlp4 (revised syntax)
>   #predicates "p,q,...";;   to set these predicates
>   Topfind.reset();;         to force that packages will be reloaded
>   #thread;;                 to enable threads
>
> No such package: core.std
>
> Type #utop_help for help about using utop.
>
> -------------------------------------------------------------------------------------------
>
> ocaml can't find core.std and loads camlp4 too...
>
> $ ocaml
>         OCaml version 4.02.3
>
> Findlib has been successfully loaded. Additional directives:
>   #require "package";;      to load a package
>   #list;;                   to list the available packages
>   #camlp4o;;                to load camlp4 (standard syntax)
>   #camlp4r;;                to load camlp4 (revised syntax)
>   #predicates "p,q,...";;   to set these predicates
>   Topfind.reset();;         to force that packages will be reloaded
>   #thread;;                 to enable threads
>
> /home/zen3ger/.opam/4.02.3/lib/ocaml/threads: added to search path
> /home/zen3ger/.opam/4.02.3/lib/ocaml/unix.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/ocaml/threads/threads.cma: loaded
> No such package: core.std
> /home/zen3ger/.opam/4.02.3/lib/core: added to search path
> /home/zen3ger/.opam/4.02.3/lib/ocaml/nums.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/num-top: added to search path
> /home/zen3ger/.opam/4.02.3/lib/num-top/num_top.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/num: added to search path
> /home/zen3ger/.opam/4.02.3/lib/ocaml/bigarray.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/ocaml/str.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/bytes: added to search path
> /home/zen3ger/.opam/4.02.3/lib/batteries: added to search path
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteries.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteriesConfig.cmo: loaded
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteriesHelp.cmo: loaded
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteriesPrint.cmo: loaded
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteriesThread.cma: loaded
> /home/zen3ger/.opam/4.02.3/lib/batteries/batteriesThread.cma: loaded
>
>
>
> 2016-08-10 12:53 keltezéssel, Kakadu írta:
>>
>> It seems that you have done `opam switch` and now some packages are
>> not installed. (I.e. opam doesn't look for packages installled in
>> /usr/lib anymore.) So, toplevel gives you an error about unknown
>> topfind.
>>
>> It's likely  that `opam install core batteries utop` will fix that.
>>
>> But it is a little bit strange that utop still prints the same. It is
>> likely that you have a little bit dirty environment. You can try to
>> reopen terminal and try again and see that result differs. Don't
>> forget to do `eval $(opam config env)` at the beginnning!
>>
>> Kakadu
>>
>> On Wed, Aug 10, 2016 at 1:48 PM, Kovács Roland <zen3ger@gmail.com> wrote:
>>>
>>> Hi!
>>>
>>> Thans for the tip!
>>>
>>> I've tried and utop still prints exactly the same, and it still imports
>>> camlp4, while ocaml prints another error now:
>>>
>>> $ ocaml
>>>          OCaml version 4.02.3
>>>
>>> Cannot find file topfind.
>>> Unknown directive `thread'.
>>>
>>> Roland
>>>
>>>
>>> 2016-08-10 12:19 keltezéssel, Kakadu írta:
>>>>
>>>> Can you try the same without line about `camlp4` in your ~/.ocamlinit
>>>> file? It is very likely that you will not need it at all because
>>>> modern versions of libraries doesn't require it anymore.
>>>>
>>>> Also, I can recommend you to compile ocaml locally using `opam switch
>>>> 4.02.3 && eval $(opam config env)` command.
>>>>
>>>> kakadu
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Wed, Aug 10, 2016 at 8:52 AM, Kovács Roland <zen3ger@gmail.com>
>>>> wrote:
>>>>>
>>>>> Hello Everyone!
>>>>>
>>>>> I'm completely new to OCaml, but I've read that it's a good practice to
>>>>> start by having both Batteries and the Core module installed.
>>>>> I'm using Ubuntu 16.04, and installed ocaml, opam, utop from the
>>>>> official
>>>>> PPAs as it seemed that the one provided for Ubuntu (avsm/ppa) is not
>>>>> working
>>>>> for 16.04!
>>>>>
>>>>> After installation I did opam init, and all the setups it asked me to
>>>>> do.
>>>>> In
>>>>> my .ocamlinit file I have what I've found as a fix for the error
>>>>> 'unbound
>>>>> module'.
>>>>> For one time utop found the modules, but since then it gives me an
>>>>> error.
>>>>>
>>>>>
>>>>> Cheers,
>>>>> Roland
>>>>> --------------------------------------------------------------------
>>>>> Judging by the output of opam, the packages should be installed
>>>>> correctly
>>>>> :
>>>>>
>>>>> $ opam list
>>>>> # Installed packages for system:
>>>>> base-bigarray            base  Bigarray library distributed with the
>>>>> OCaml
>>>>> compi
>>>>> base-bytes               base  Bytes library distributed with the OCaml
>>>>> compiler
>>>>> base-ocamlbuild          base  OCamlbuild binary and libraries
>>>>> distributed
>>>>> with
>>>>> base-threads             base  Threads library distributed with the
>>>>> OCaml
>>>>> compil
>>>>> base-unix                base  Unix library distributed with the OCaml
>>>>> compiler
>>>>> batteries               2.5.2  a community-maintained standard library
>>>>> extension
>>>>> bin_prot            113.33.03  A binary protocol generator
>>>>> cmdliner                0.9.8  Declarative definition of command line
>>>>> interfaces
>>>>> conf-m4                     1  Virtual package relying on m4
>>>>> core                113.33.03  Industrial strength alternative to
>>>>> OCaml's
>>>>> standa
>>>>> core_kernel         113.33.03  Industrial strength alternative to
>>>>> OCaml's
>>>>> standa
>>>>> cppo                    1.3.2  Equivalent of the C preprocessor for
>>>>> OCaml
>>>>> progra
>>>>> depext                  1.0.1  Query and install external dependencies
>>>>> of
>>>>> OPAM p
>>>>> fieldslib           113.33.03  Syntax extension to define first class
>>>>> values
>>>>> rep
>>>>> js-build-tools      113.33.04  Collection of tools to help building
>>>>> Jane
>>>>> Street
>>>>> ocamlbuild                  0  Build system distributed with the OCaml
>>>>> compiler
>>>>> ocamlfind               1.6.2  A library manager for OCaml
>>>>> ppx_assert          113.33.03  Assert-like extension nodes that raise
>>>>> useful
>>>>> err
>>>>> ppx_bench           113.33.03  Syntax extension for writing in-line
>>>>> benchmarks i
>>>>> ppx_bin_prot        113.33.03  Generation of bin_prot readers and
>>>>> writers
>>>>> from t
>>>>> ppx_compare         113.33.03  Generation of comparison functions from
>>>>> types
>>>>> ppx_core            113.33.03  Standard library for ppx rewriters
>>>>> ppx_custom_printf   113.33.03  Printf-style format-strings for
>>>>> user-defined
>>>>> stri
>>>>> ppx_deriving              4.0  Type-driven code generation for OCaml
>>>>>>
>>>>>> =4.02
>>>>>
>>>>> ppx_driver          113.33.03  Feature-full driver for OCaml AST
>>>>> transformers
>>>>> ppx_enumerate       113.33.03  Generate a list containing all values of
>>>>> a
>>>>> finite
>>>>> ppx_expect          113.33.03  Cram like framework for OCaml
>>>>> ppx_fail            113.33.03  Add location to calls to failwiths
>>>>> ppx_fields_conv     113.33.03  Generation of accessor and iteration
>>>>> functions fo
>>>>> ppx_here            113.33.03  Expands [%here] into its location
>>>>> ppx_inline_test     113.33.03  Syntax extension for writing in-line
>>>>> tests
>>>>> in
>>>>> oca
>>>>> ppx_jane            113.33.03  Standard Jane Street ppx rewriters
>>>>> ppx_let             113.33.03  Monadic let-bindings
>>>>> ppx_optcomp         113.33.03  Optional compilation for OCaml
>>>>> ppx_pipebang        113.33.03  A ppx rewriter that inlines reverse
>>>>> application o
>>>>> ppx_sexp_conv       113.33.03  Generation of S-expression conversion
>>>>> functions f
>>>>> ppx_sexp_message    113.33.03  A ppx rewriter for easy construction of
>>>>> s-express
>>>>> ppx_sexp_value      113.33.03  A ppx rewriter that simplifies building
>>>>> s-express
>>>>> ppx_tools          5.0+4.02.0  Tools for authors of ppx rewriters and
>>>>> other
>>>>> synt
>>>>> ppx_type_conv       113.33.03  Support Library for type-driven code
>>>>> generators
>>>>> ppx_typerep_conv    113.33.03  Generation of runtime types from type
>>>>> declaration
>>>>> ppx_variants_conv   113.33.03  Generation of accessor and iteration
>>>>> functions fo
>>>>> re                      1.6.1  RE is a regular expression library for
>>>>> OCaml
>>>>> result                    1.2  Compatibility Result module
>>>>> sexplib             113.33.03  Library for serializing OCaml values to
>>>>> and
>>>>> from
>>>>> typerep             113.33.03  typerep is a library for runtime types.
>>>>> variantslib         113.33.03  Part of Jane Street's Core library
>>>>>
>>>>>
>>>>> --------------------------------------------------------------------
>>>>> My .ocmalinit :
>>>>>
>>>>> #use "topfind";;
>>>>> #thread;;
>>>>> #camlp4o;;
>>>>> #require "core.std";;
>>>>> #require "core.syntax";;
>>>>> #require "batteries";;
>>>>>
>>>>> let () =
>>>>>     try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
>>>>>     with Not_found -> ()
>>>>> ;;
>>>>>
>>>>> --------------------------------------------------------------------
>>>>> What ocaml prints :
>>>>>
>>>>> $ ocaml
>>>>>                          OCaml version 4.02.3
>>>>> Findlib has been successfully loaded. Additional directives:
>>>>>     #require "package";;      to load a package
>>>>>     #list;;                   to list the available packages
>>>>>     #camlp4o;;                to load camlp4 (standard syntax)
>>>>>     #camlp4r;;                to load camlp4 (revised syntax)
>>>>>     #predicates "p,q,...";;   to set these predicates
>>>>>     Topfind.reset();;         to force that packages will be reloaded
>>>>>     #thread;;                 to enable threads
>>>>>
>>>>> /usr/lib/ocaml/threads: added to search path
>>>>> /usr/lib/ocaml/unix.cma: loaded
>>>>> /usr/lib/ocaml/threads/threads.cma: loaded
>>>>> /usr/lib/ocaml/dynlink.cma: loaded
>>>>> /usr/lib/ocaml/camlp4: added to search path
>>>>> /usr/lib/ocaml/camlp4/camlp4o.cma: loaded
>>>>> No such package: core.std
>>>>> /home/zen3ger/.opam/system/lib/core: added to search path
>>>>> /usr/lib/ocaml/nums.cma: loaded
>>>>> /home/zen3ger/.opam/system/lib/num-top: added to search path
>>>>> /home/zen3ger/.opam/system/lib/num-top/num_top.cma: loaded
>>>>>       Camlp4 Parsing version 4.02.3
>>>>>
>>>>> /home/zen3ger/.opam/system/lib/num: added to search path
>>>>> /usr/lib/ocaml/bigarray.cma: loaded
>>>>> /usr/lib/ocaml/str.cma: loaded
>>>>> /home/zen3ger/.opam/system/lib/bytes: added to search path
>>>>> /home/zen3ger/.opam/system/lib/batteries: added to search path
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteries.cma: loaded
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteriesConfig.cmo: loaded
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteriesHelp.cmo: loaded
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteriesPrint.cmo: loaded
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
>>>>> /home/zen3ger/.opam/system/lib/batteries/batteriesThread.cma: loaded
>>>>>
>>>>>
>>>>> --------------------------------------------------------------------
>>>>> What utop prints :
>>>>>
>>>>> Findlib has been successfully loaded. Additional directives:
>>>>>     #require "package";;      to load a package
>>>>>     #list;;                   to list the available packages
>>>>>     #camlp4o;;                to load camlp4 (standard syntax)
>>>>>     #camlp4r;;                to load camlp4 (revised syntax)
>>>>>     #predicates "p,q,...";;   to set these predicates
>>>>>     Topfind.reset();;         to force that packages will be reloaded
>>>>>     #thread;;                 to enable threads
>>>>>
>>>>> No such package: core.std
>>>>> No such package: core.syntax
>>>>> No such package: batteries
>>>>>
>