Build failure on trunk

[Sudha247]

Build fails on OCaml trunk due to removal of the Pervasives module. Any pointers on how to fix it?

ocamlfind ocamlopt -c -package seq -package uchar -bin-annot -no-alias-deps -nolabels -I . -alert -deprecated stdcompat__native.mli -o stdcompat__native.cmi
ocamlfind ocamlopt -c -package seq -package uchar -bin-annot -no-alias-deps -nolabels -I . -alert -deprecated stdcompat__init.mli -o stdcompat__init.cmi
File "stdcompat__init.mli", line 45, characters 9-26:
45 | ('a, 'b) Pervasives.result =
              ^^^^^^^^^^^^^^^^^
Error: Unbound module Pervasives
Makefile:1736: recipe for target 'stdcompat__init.cmi' failed
make[1]: *** [stdcompat__init.cmi] Error 2
make[1]: Leaving directory '/home/sudha/ocaml/sudha/stdcompat'
Makefile:888: recipe for target 'all' failed
make: *** [all] Error 2

[Leonidas-from-XIV]

It probably needs a switch to use either Pervasives (older compiler versions) and Stdlib (5.0+ and possibly already earlier versions, to avoid deprecation warnings).

Maybe a module like stdcompat__stdlib should be created that does exactly this?

[thierry-martinez]

Thank you for your report! The new release stdcompat.19 is out (PR for opam: ocaml/opam-repository#21537) and is compatible with OCaml 5.0. For the moment, Stdcompat still exposes a Stdcompat.Pervasives module, which relies on Stdlib with OCaml >=4.07. More work should be done to restore automatic API generation with OCaml 5.0 (I updated the API of this release by hand; in particular, I prefer to wait that the standard library of OCaml 5.0 becomes stable in OCaml beta releases before adding more features from OCaml 5.0), and this will probably lead to a module stdcompat__stdlib as @Leonidas-from-XIV suggests in future versions.