[Caml-list] -custom linking against -lncurses?

[Caml-list] -custom linking against -lncurses?

[Malcolm Matalka]

I have noticed on my machine, ocamlc, using -custom, tries to link the
resulting code against ncurses[1].

Is this behaviour expected?  I know how to get around this on my OS but
not sure why it's happening in the first place.

/Malcolm 

[1]
malcolm@nix-junkyard:/tmp$ ocamlc -o foo foo.ml
malcolm@nix-junkyard:/tmp$ ocamlc -custom -o foo foo.ml
/nix/store/1iigiim5855m8j7pmwf5xrnpf705s4dh-binutils-2.21.1a/bin/ld:
cannot find -lncurses
collect2: ld returned 1 exit status
File "foo.ml", line 1, characters 0-1:
Error: Error while building custom runtime system

Re: [Caml-list] -custom linking against -lncurses?

[Gerd Stolpmann]

It's a configure-time issue: Look at the output of "ocamlc -config", and
you see an -lncurses in bytecomp_c_libraries. Basically, the curses
library is only needed for the toploop (for accessing terminfo), but as
the toploop uses the bytecode compiler, the -lncurses option is
propagated to all bytecode programs. I guess this is for simplicity of
the runtime system.

You can get rid of that by passing -no-curses to the "configure" script
when you build ocaml.

Gerd

Am Freitag, den 30.11.2012, 04:31 -0500 schrieb Malcolm Matalka:
> I have noticed on my machine, ocamlc, using -custom, tries to link the
> resulting code against ncurses[1].
> 
> Is this behaviour expected?  I know how to get around this on my OS but
> not sure why it's happening in the first place.
> 
> /Malcolm 
> 
> [1]
> malcolm@nix-junkyard:/tmp$ ocamlc -o foo foo.ml
> malcolm@nix-junkyard:/tmp$ ocamlc -custom -o foo foo.ml
> /nix/store/1iigiim5855m8j7pmwf5xrnpf705s4dh-binutils-2.21.1a/bin/ld:
> cannot find -lncurses
> collect2: ld returned 1 exit status
> File "foo.ml", line 1, characters 0-1:
> Error: Error while building custom runtime system
> 

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