[Caml-list] custom linking not working

[Caml-list] custom linking not working

[Ian Zimmerman]

What am I doing wrong here???

itz:~# ocamlc -linkall -custom toplevellib.cma /usr/lib/ocaml/libgraphics.a \
        topmain.cmo -o ocaml.graphics
itz:~# ./ocaml.graphics
        Objective Caml version 3.01

# #load "/usr/lib/ocaml/graphics.cma";;
The external function `gr_set_text_size' is not available
# 
itz:~# ocamlc -v
The Objective Caml compiler, version 3.01
Standard library directory: /usr/lib/ocaml
itz:~# nm /usr/lib/ocaml/libgraphics.a | grep gr_set_text_size 
000000bc T gr_set_text_size


-- 
Ian Zimmerman, Oakland, California, U.S.A.
EngSoc adopts market economy: cheap is wasteful, efficient is expensive.
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Re: [Caml-list] custom linking not working

[Jacques Garrigue]

From: Ian Zimmerman <itz@speakeasy.org>

> What am I doing wrong here???
> 
> itz:~# ocamlc -linkall -custom toplevellib.cma /usr/lib/ocaml/libgraphics.a \
>         topmain.cmo -o ocaml.graphics

You shouldn't use libgraphics.a, but graphics.cma.

The right invocation is much simpler:

    ocamlmktop graphics.cma -o ocaml.graphics

Jacques Garrigue
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Re: [Caml-list] custom linking not working

[Ian Zimmerman]

itz> What am I doing wrong here???
itz> 
itz> itz:~# ocamlc -linkall -custom toplevellib.cma
itz> /usr/lib/ocaml/libgraphics.a \ topmain.cmo -o ocaml.graphics

Jacques> You shouldn't use libgraphics.a, but graphics.cma.  The right
Jacques> invocation is much simpler:

Jacques> ocamlmktop graphics.cma -o ocaml.graphics

Well, I know that would work, of course :-)

But what I was trying to do was precisely to avoid linking the
bytecode at build time.  Is that impossible?

-- 
Ian Zimmerman, Oakland, California, U.S.A.
EngSoc adopts market economy: cheap is wasteful, efficient is expensive.
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Re: [Caml-list] custom linking not working

[Xavier Leroy]

> What am I doing wrong here???
> 
> itz:~# ocamlc -linkall -custom toplevellib.cma /usr/lib/ocaml/libgraphics.a \
>         topmain.cmo -o ocaml.graphics
> itz:~# ./ocaml.graphics
>         Objective Caml version 3.01
> 
> # #load "/usr/lib/ocaml/graphics.cma";;
> The external function `gr_set_text_size' is not available
> # 
> itz:~# ocamlc -v
> The Objective Caml compiler, version 3.01
> Standard library directory: /usr/lib/ocaml
> itz:~# nm /usr/lib/ocaml/libgraphics.a | grep gr_set_text_size 
> 000000bc T gr_set_text_size

With -custom, only C primitives actually referenced from Caml code get
linked in.  At the very least, you need to link a Caml object file that
just declares "external" all the C primitives you're interested in.

All the best,

- Xavier Leroy
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