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I've downgraded this package to 0.35.0, see https://gitlab.com/dpeukert/pkgbuilds/-/issues/885 for more details and my reasoning.

The PKGBUILD for this package is hosted here (contributions are welcome!): https://gitlab.com/dpeukert/pkgbuilds/tree/main/ocaml-ppxlib

A number of builds (gapi-ocaml, ocaml-curl, ocaml-lwt, ocaml-ounit) are failing with the following:

Command [115] exited with code 2:
$ (cd _build/default && /usr/bin/ocamlopt.opt -g -w -24 -o .ppx/0239f03c537a9797eb8a71ed48e45a87/ppx.exe /usr/lib/ocaml/compiler-libs/ocamlcommon.cmxa /usr/lib/ocaml/ocaml-compiler-libs/common/ocaml_common.cmxa /usr/lib/ocaml/ppxlib/astlib/astlib.cmxa /usr/lib/ocaml/ppxlib/ast/ppxlib_ast.cmxa /usr/lib/ocaml/ocaml-compiler-libs/shadow/ocaml_shadow.cmxa /usr/lib/ocaml/ppxlib/print_diff/ppxlib_print_diff.cmxa /usr/lib/ocaml/ppx_derivers/ppx_derivers.cmxa /usr/lib/ocaml/ppxlib/traverse_builtins/ppxlib_traverse_builtins.cmxa /usr/lib/ocaml/sexplib0/sexplib0.cmxa /usr/lib/ocaml/ppxlib/stdppx/stdppx.cmxa /usr/lib/ocaml/ppxlib/ppxlib.cmxa /usr/lib/ocaml/base/base_internalhash_types/base_internalhash_types.cmxa -I /usr/lib/ocaml/base/base_internalhash_types /usr/lib/ocaml/base/shadow_stdlib/shadow_stdlib.cmxa /usr/lib/ocaml/ocaml_intrinsics_kernel/ocaml_intrinsics_kernel.cmxa -I /usr/lib/ocaml/ocaml_intrinsics_kernel /usr/lib/ocaml/base/base.cmxa -I /usr/lib/ocaml/base /usr/lib/ocaml/ppx_here/expander/ppx_here_expander.cmxa /usr/lib/ocaml/ppx_let/expander/ppx_let_expander.cmxa /usr/lib/ocaml/ppx_let/ppx_let.cmxa .ppx/0239f03c537a9797eb8a71ed48e45a87/dune__exe___ppx.cmx)
File "_none_", line 1:
Error: Files /usr/lib/ocaml/ppx_here/expander/ppx_here_expander.cmxa
       and /usr/lib/ocaml/ppxlib/stdppx/stdppx.cmxa
       make inconsistent assumptions over interface Stdppx

gapi-ocaml depends on ocaml-curl and ocaml-ounit which both depend on ocaml-lwt, which depends on ocaml-ppxlib. This leads me to believe this could be the root of the issue, so apologies if it's the wrong place. It looks like the main OCAML package was last updated in January but I'm not sure how long this has been failing (it was just a failing update on two of the packages but in attempting to fix it I removed and re-installed everything which seems to have revealed more broken installs)

I've downgraded this package to 0.35.0, see https://gitlab.com/dpeukert/pkgbuilds/-/issues/885 for more details and my reasoning.

@ktrls: Hi, as the error says, the issue is caused by some of the dependencies being built with an older version of OCaml. Rebuilding ocaml-compiler-libs-repackaged (and any other dependencies mentioned in the build log with the same error) should enable ppxlib to build, or if you don't want to hunt down the affected dependencies, uninstalling all OCaml packages and starting from a clean slate would also work.

Hi, when I try to install ocaml-ppxlib the process stop with a lot of errors.

This is the tail of the error stack

Command [260] exited with code 2:                 
$ (cd _build/default && /usr/bin/ocamlopt.opt -w -9 -g -I astlib/.astlib.objs/byte -I astlib/.astlib.objs/native -I /usr/lib/ocaml/compiler-libs -I /usr/lib/ocaml/ocaml-compiler-libs/common -intf-suffix .ml -no-alias-deps -open Astlib__ -o astlib/.astlib.objs/native/astlib__Ast_metadata.cmx -c -impl astlib/ast_metadata.pp.ml)
File "astlib/ast_metadata.pp.ml", line 1:
Error: /usr/lib/ocaml/ocaml-compiler-libs/common/ocaml_common.cmi
       is not a compiled interface for this version of OCaml.
It seems to be for an older version of OCaml.
==> ERRORE: Si è verificato un errore in build(). 
    L'operazione sta per essere interrotta...
Finished with result: exit-code
Main processes terminated with: code=exited, status=4/NOPERMISSION

but the OCalm version is the latest one.

Can you help me to resolve?

Build was successful, but then the packaging phase failed for me. What could be the issue? (Similar problem just happened with another Ocaml-based AUR package.)

==> Starting package()...
dune install: option `--libdir': the path must be absolute to avoid ambiguity
Usage: dune install [OPTION]... [PACKAGE]...
Try `dune install --help' or `dune --help' for more information.
==> ERROR: A failure occurred in package().
    Aborting...
error: failed to build 'ocaml-ppxlib-0.26.0-1'

Edit - Disregard. My PATH var got prepended by opam causing this issue. Removing its entry resolved it.

Failing to build. Tried reinstalling stdlib-shims and sexplib0. No improvement.

Running[233]: (cd _build/default && /usr/bin/ocamldep.opt -modules -impl ast/versions.pp.ml) > _build/default/ast/.ppxlib_ast.objs/versions.pp.ml.d
File "ast/dune", line 8, characters 19-31:
8 |  (libraries astlib stdlib-shims)
                       ^^^^^^^^^^^^
Error: Library "stdlib-shims" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
File "astlib/dune", line 4, characters 12-38:
4 |  (libraries ocaml-compiler-libs.common compiler-libs.common)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Library "ocaml-compiler-libs.common" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
File "metaquot_lifters/dune", line 6, characters 51-63:
6 |  (libraries ppxlib ppxlib_traverse_builtins stdppx stdlib-shims))
                                                       ^^^^^^^^^^^^
Error: Library "stdlib-shims" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
File "src/dune", line 13, characters 2-10:
13 |   sexplib0)
       ^^^^^^^^
Error: Library "sexplib0" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
File "src/gen/dune", line 5, characters 62-74:
5 |  (libraries ppxlib_ast astlib ppxlib_traverse_builtins stdppx stdlib-shims))
                                                                  ^^^^^^^^^^^^
Error: Library "stdlib-shims" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
File "stdppx/dune", line 4, characters 21-33:
4 |  (libraries sexplib0 stdlib-shims)
                         ^^^^^^^^^^^^
Error: Library "stdlib-shims" not found.
Hint: try:
  dune external-lib-deps --missing --no-config --root . --ignore-promoted-rules --default-target @install --always-show-command-line --promote-install-files --release --profile release --verbose @install
==> ERROR: A failure occurred in build().
    Aborting...

thx :-)

@simona Fixed, sorry about the delay.

@simona Sorry about that, I forgot to update the patch. Will try to fix it this evening.

patching file ast/ast_helper_lite.ml
Hunk #1 FAILED at 20.
1 out of 1 hunk FAILED -- saving rejects to file ast/ast_helper_lite.ml.rej
patching file ast/ast_helper_lite.mli
Hunk #1 FAILED at 16.
1 out of 1 hunk FAILED -- saving rejects to file ast/ast_helper_lite.mli.rej
patching file ast/dune
Hunk #1 FAILED at 9.
1 out of 1 hunk FAILED -- saving rejects to file ast/dune.rej
patching file ast/versions.ml
Hunk #3 succeeded at 506 (offset 17 lines).
patching file ast/versions.mli
==> ERRORE: Si è verificato un errore in prepare().