Handling linker arguments in ocamlmklib

[Jonathan Perkin <jperkin%joyent.com@localhost>]

I'm working on fixing ocaml on SunOS.  One of the issues I'm now
hitting is that ocamlmklib cannot find any pkgsrc libraries, e.g. when
building archivers/ocaml-bz2 using bzip2 from pkgsrc I see:

  ===> Building for ocaml-bz2-0.6.0nb6
  ocamlc.opt -ccopt "-D BZ_PREFIX -I/opt/local/include -I/usr/include -pipe -pipe -I/opt/local/include -I/usr/include" -c c_bz.c
  ocamlmklib -oc camlbz2 c_bz.o -lbz2
  ld: fatal: library -lbz2: not found

This appears to be because ocamlmklib expects linker arguments (-L and
-Wl,-R) to be passed directly to it rather than via -ccopt.

I've written a patch to handle ocamlmklib in a special way:

  https://gist.github.com/jperkin/1c85056f66ade8f97efc

which fixes my issue:

  ===> Building for ocaml-bz2-0.6.0nb6
  ocamlc.opt -ccopt "-D BZ_PREFIX -I/opt/local/include -I/usr/include -pipe -pipe -I/opt/local/include -I/usr/include" -c c_bz.c
  ocamlmklib -oc camlbz2 c_bz.o -lbz2
  ocamlc.opt -c bz2.mli
  ocamlc.opt -c bz2.ml
  ocamlmklib -oc camlbz2 -o bz2 bz2.cmo -lbz2
  ocamlopt.opt -c bz2.ml
  ocamlmklib -oc camlbz2 -o bz2 bz2.cmx -lbz2

but I'm no ocaml expert so would like it reviewed before committing.

Thanks,

-- 
Jonathan Perkin  -  Joyent, Inc.  -  www.joyent.com