Re: [Caml-list] OASIS help: link stublib to system lib and another caml lib

[Christophe Troestler <Christophe.Troestler@umons.ac.be>]

On 2016-05-27, Olaf Hering wrote:
> 
> On Thu, May 26, Christophe Troestler wrote:
> 
> > "-lfuse" is needed because it is the library you bind to but
> > "-L/usr/lib64/ocaml -lcamlidl" should be handled by "camlidl" 
> > (specifically
> > by `ocamlfind query camlidl`/com.cma).
> 
> Are you saying that something should automatically generate and pass 
> the
> -L option to the compiler with the provided _oasis file? For me 
> nothing
> like that happens if I add just '-lfuse -lcamlidl' to CcOpt:
> execve("/usr/bin/gcc", ["gcc", "-shared", "-o", 
> "lib/dllFuse_stubs.so",
> "lib/Fuse_util.o", "lib/Unix_util_stubs.o", 
> "lib/Fuse_bindings_stubs.o",
> "-lfuse", "-lcamlidl"]
> 
> For the time being my workaround is to use '-L/usr/lib64/ocaml 
> -L/usr/lib/ocaml' which appearently fixes 32 and 64bit builds.
> 
> To me it looks like "OCamlbuild additional flags:" needs to be set. 
> Is there a way to pass this via 'ocaml setup.ml -configure'?

You wan only pass static options via _oasis.  If you can get the path to 
camlidl — which the camlidl library should provide, try "ocamlfind query 
camlidl" — then you can use the trick below to pass it to ocamlbuild and 
set appropriate flags.

> > https://github.com/Chris00/ocaml-odepack/blob/master/setup.ml#L68
> 
> I think thats a very bad advice. Are you suggesting to ignore the 'DO 
> NOT EDIT' of each generated setup.ml? Being able to regenerate the 
> files required for building from scratch is essential.

The edits are *outside* the OASIS section so are preserved upon 
regeneration — this is the purpose of the delimiters, this not bad 
advice at all! :-)

Best,
C.