[Caml-list] creating a standalone labltk program

[Caml-list] creating a standalone labltk program

[ben mailist]

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hi

I try to staticall link all necessary libraries to create a standalone
labltk application. So that it is no longer necessary to install the tcl/tk
runtime on the target machine.

Environment:
  - mac os x 10.6
  - ocaml 3.12.1

Build command:

    $ ocamlopt -o lb -linkall  -I +labltk labltk.cmxa listbox01.ml

Size looks promising:

    $ du -sh lb
     2.6 M

But its not running. After disabling the Tk.framework directory, I get this

Error:

    $ ./lb
dyld: Library not loaded:
/System/Library/Frameworks/Tk.framework/Versions/8.5/Tk
  Referenced from: /Volumes/.../temp/./lb
  Reason: image not found
Trace/BPT trap

Apparently the '-linkall' switch is not enough. Is this something that has
to be defined with ./configure when compiling ocaml? I couldn't find an
appropriate ./configure switch for that.

thanks in advance
ben

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Re: [Caml-list] creating a standalone labltk program

[ygrek]

On Thu, 28 Jul 2011 14:43:58 +0200
ben mailist <ben.mailist@gmail.com> wrote:

> I try to staticall link all necessary libraries to create a standalone
> labltk application. So that it is no longer necessary to install the tcl/tk
> runtime on the target machine.
> [...]
>     $ ocamlopt -o lb -linkall  -I +labltk labltk.cmxa listbox01.ml

-linkall links in all ocaml modules, it has nothing to do with linking of external libraries.
In order to link everything statically you need to ask C linker to do so - the simplest way is
to use `-ccopt -static` but that means linking in libc which is not good usually. More involved and 
correct way is to wrap all external libraries with `-Wl,-Bstatic -lxxx -Wl,-Bdynamic` on command-line.
Note that using `ocamlopt -ccopt -Wl,-Bstatic <all arguments> -ccopt -Wl,-Bdynamic` (to wrap all libs
at once) will not usually work as ocamlopt reorders `-ccopt` at will :( Use `-verbose` to check what is
being passed to gcc.

-- 
 ygrek
 http://ygrek.org.ua

Re: [Caml-list] creating a standalone labltk program

[Jacques Garrigue]

On 2011/07/28, at 21:43, ben mailist wrote:

> hi
> 
> I try to staticall link all necessary libraries to create a standalone labltk application. So that it is no longer necessary to install the tcl/tk runtime on the target machine.

Unfortunately, this is more or less impossible to achieve: Tcl/Tk requires its own library of tcl scripts to be installed on the target machine, so that you cannot be really standalone. By either using ocamlopt or ocamlc -custom, you limit the dependency to having the right version of Tcl/Tk installed, which should not be too hard on  Unix/OSX or for a motivated windows user.
The situation is a bit better with lablgtk: you can create standalone executables (see unison for instance for how to do that).
You loose part of the functionality of gtk (themes and input methods require dynamic loading), but your application will still work.

Jacques Garrigue