ocamlfind is required by all packages that use ocamlbuild with 4.02.0

[edwintorok]

Try installing ocp-indent in an otherwise fresh 'opam switch 4.02.0+trunk':

===== ERROR while installing ocp-indent.0.6.1 =====
# opam-version 1.1.1
# os           linux
# command      ocamlbuild src/main.native
# path         /home/edwin/.opam/4.02.0+trunk/build/ocp-indent.0.6.1
# compiler     4.02.0+trunk
# exit-code    2
# env-file     /home/edwin/.opam/4.02.0+trunk/build/ocp-indent.0.6.1/ocp-indent-6610-d8a4ae.env
# stdout-file  /home/edwin/.opam/4.02.0+trunk/build/ocp-indent.0.6.1/ocp-indent-6610-d8a4ae.out
# stderr-file  /home/edwin/.opam/4.02.0+trunk/build/ocp-indent.0.6.1/ocp-indent-6610-d8a4ae.err
### stdout ###
# ...[truncated]
# checking for ocamlmktop... ocamlmktop
# checking for ocamlmklib... ocamlmklib
# checking for ocamldoc... ocamldoc
# checking for ocamlbuild... ocamlbuild
# configure: creating ./config.status
# config.status: creating Makefile.config
# config.status: creating src/globals.ml
# 
# Executables will be installed in /home/edwin/.opam/4.02.0+trunk/bin
# Failure: ocamlfind not found on path, but -no-ocamlfind not used.

Can ocamlfind be automatically installed when you create a 4.02.0+trunk switch?
Seems like you'd either have to update all packages that use ocamlbuild
to depend on ocamlfind, or make ocamlfind something that is an implicit dependency of all packages/automatically installed when you switch to 4.02.0.

[samoht]

Failure: ocamlfind not found on path, but -no-ocamlfind not used.

that's a pretty terrible failure case ... I though that change was reverted (see ocaml/ocaml#20)

[kit-ty-kate]

Nope. I can be reverted by ocaml/ocaml#60 but some people don't want this feature reverted.
Maybe we can wait to do something on opam packages until the discussion on reverting or not is closed.

[samoht]

Well, as ocamlbuild is not distributed as a separate package, that means we have to install ocamlfind by default. I'm not sure to understand why this is a hard-error though, and not just displaying a warning and continuing to run ocamlbuild with -no-ocamlfind.

[gasche]

Your comments would be welcome on the mantis issue on -use-ocamlfind:
http://caml.inria.fr/mantis/view.php?id=5547

[kit-ty-kate]

This issue should be closed now.