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Propagate linkall to js_of_ocaml for separate compilation #6832

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merged 2 commits into from Jan 20, 2023
Merged

Propagate linkall to js_of_ocaml for separate compilation #6832

merged 2 commits into from Jan 20, 2023

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hhugo
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@hhugo hhugo commented Jan 5, 2023

I'm currently working on ocsigen/js_of_ocaml#1378 which make js_of_ocaml link only link required compilation units (similar to what ocamlc/ocamlopt do).
The goal is reduce the size of the generated js files and fix a semantic difference between whole program and separate compilation (Side effects in a library are always performed with separate compilation).

with ocsigen/js_of_ocaml#1378, js_of_ocaml link accept a new flag --linkall. This PR tries to propagate that information where it's currently ignored.

The first commit is mostly a cleanup.

  • it replaces Action_builder.map/bind with the Action_builder.O let syntax
  • it extract the type Link_time_code_gen.t to its own module to avoid circular deps.
  • make it clear where we ignore -linkall information

The second just actually propagate the linkall flags

I'm not sure how to proceed from there

One solution would be the check the jsoo version to decide whether to include the flag or not. Is it acceptable ? does this exist elsewhere in the codebase ?

hhugo
hhugo commented Jan 5, 2023
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Alizter commented Jan 5, 2023 •
edited

For Coq, we query the coqc installation early on in order to determine whether to pass native compilation flags. I suppose you could query jsoo to determine if --linkall will be supported and add them in accordingly. The relevant code is in coq_config.ml. OCaml is queried early on in every Dune build, so Coq is only an example of a deferred version query.

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hhugo commented Jan 6, 2023

For Coq, we query the coqc installation early on in order to determine whether to pass native compilation flags. I suppose you could query jsoo to determine if --linkall will be supported and add them in accordingly. The relevant code is in coq_config.ml. OCaml is queried early on in every Dune build, so Coq is only an example of a deferred version query.

Thanks, I've tried to do something similar.

@hhugo hhugo added this to the 3.7.0 milestone Jan 6, 2023
@rgrinberg rgrinberg added the jsoo label Jan 6, 2023
@hhugo hhugo mentioned this pull request Jan 7, 2023
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hhugo commented Jan 7, 2023

ocsigen/js_of_ocaml#1378 has just been merged, keeping the default behavior unchanged for now to prevent silent breakage.

@hhugo hhugo mentioned this pull request Jan 10, 2023
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hhugo commented Jan 11, 2023

I've rebased and squashed some commits.

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hhugo commented Jan 12, 2023

Gentle ping

rgrinberg
rgrinberg reviewed Jan 12, 2023
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hhugo commented Jan 12, 2023
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@hhugo hhugo requested a review from rgrinberg January 13, 2023 00:51
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hhugo commented Jan 17, 2023

I've rebased and squashed commits again.
ping @rgrinberg

@hhugo @rgrinberg
refactor(jsoo): don't ignore linkall (prepare)
bbaceea 
Signed-off-by: Hugo Heuzard <hugo.heuzard@gmail.com>
@hhugo @rgrinberg
fix(jsoo): don't ignore linkall
35b9f13 
Signed-off-by: Hugo Heuzard <hugo.heuzard@gmail.com>
@rgrinberg rgrinberg merged commit c357cee into ocaml:main Jan 20, 2023
@hhugo hhugo deleted the jsoo_linkall branch January 20, 2023 05:42
@hhugo hhugo mentioned this pull request Jan 23, 2023
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@emillon emillon mentioned this pull request Feb 6, 2023
Closed
emillon added a commit to emillon/opam-repository that referenced this pull request Feb 6, 2023
@emillon
[new release] xdg, stdune, ordering, ocamlc-loc, dyn, dune, dune-site…
4eab166 
…, dune-rpc, dune-rpc-lwt, dune-private-libs, dune-glob, dune-configurator, dune-build-info, dune-action-plugin and chrome-trace (3.7.0~alpha1)

CHANGES:

- Fix parsing of OCaml errors that contain code excerpts with `...` in them.
  (ocaml/dune#7008, @rgrinberg)

- Pre-emptively clear screen in watch mode (ocaml/dune#6987, fixes ocaml/dune#6884, @rgrinberg)

- Fix cross compilation configuration when a context with targets is itself a
  host of another context (ocaml/dune#6958, fixes ocaml/dune#6843, @rgrinberg)

- Fix parsing of the `<=` operator in *blang* expressions of `dune` files.
  Previously, the operator would be interpreted as `,`. (ocaml/dune#6928, @tatchi)

- Fix `--trace-file` output. Dune now emits a single *complete* event for every
  executed process. Unterminated *async* events are no longer written. (ocaml/dune#6892,
  @rgrinberg)

- Fix preprocessing with `staged_pps` (ocaml/dune#6748, fixes ocaml/dune#6644, @rgrinberg)

- Use colored output with MDX when Dune colors are enabled.
  (ocaml/dune#6462, @MisterDA)

- Make `dune describe workspace` return consistent dependencies for
  executables and for libraries. By default, compile-time dependencies
  towards PPX-rewriters are from now not taken into account (but
  runtime dependencies always are). Compile-time dependencies towards
  PPX-rewriters can be taken into account by providing the
  `--with-pps` flag. (ocaml/dune#6727, fixes ocaml/dune#6486, @esope)

- Print missing newline after `$ dune exec`. (ocaml/dune#6821, fixes ocaml/dune#6700, @rgrinberg,
  @Alizter)

- Fix binary corruption when installing or promoting in parallel (ocaml/dune#6669, fixes
  ocaml/dune#6668, @edwintorok)

- Use colored output with GCC and Clang when compiling C stubs. The
  flag `-fdiagnostics-color=always` is added to the `:standard` set of
  flags. (ocaml/dune#4083, @MisterDA)

- Fix the parsing of decimal and hexadecimal escape literals in `dune`,
  `dune-package`, and other dune s-expression based files (ocaml/dune#6710, @shym)

- Report an error if `dune init ...` would create a "dune" file in a location
  which already contains a "dune" directory (ocaml/dune#6705, @gridbugs)

- Fix the parsing of alerts. They will now show up in diagnostics correctly.
  (ocaml/dune#6678, @rginberg)

- Fix the compilation of modules generated at link time when
  `implicit_transitive_deps` is enabled (ocaml/dune#6642, @rgrinberg)

- Allow `$ dune utop` to load libraries defined in data only directories
  defined using `(subdir ..)` (ocaml/dune#6631, @rgrinberg)

- Format dune files when they are named `dune-file`. This occurs when we enable
  the alternative file names project option. (ocaml/dune#6566, @rgrinberg)

- Move `$ dune ocaml-merlin -dump-config=$dir` to `$ dune ocaml merlin
  dump-config $dir`. (ocaml/dune#6547, @rgrinberg)

- Allow compilation rules to be impacted by `(env ..)` stanzas that modify the
  environment or set binaries. (ocaml/dune#6527, @rgrinberg)

- Coq native mode is now automatically detected by Dune starting with Coq lang
  0.7. `(mode native)` has been deprecated in favour of detection from the
  configuration of Coq. (ocaml/dune#6409, @Alizter)

- Print "Leaving Directory" whenever "Entering Directory" is printed. (ocaml/dune#6149,
  fixes ocaml/dune#138, @cpitclaudel, @rgrinberg)

- Allow `$ dune ocaml dump-dot-merlin` to run in watch mode. Also this command
  shouldn't print "Entering Directory" mesages. (ocaml/dune#6497, @rgrinberg)

- `dune clean` should no longer fail under Windows due to the inability to
  remove the `.lock` file. Also, bring the implementation of the global lock
  under Windows closer to that of Unix. (ocaml/dune#6523, @nojb)

- Remove "Entering Directory" messages for `$ dune install`. (ocaml/dune#6513,
  @rgrinberg)

- Stop passing `-q` flag in `dune coq top`, which allows for `.coqrc` to be
  loaded. (ocaml/dune#6848, fixes ocaml/dune#6847, @Alizter)

- Fix missing dependencies when detecting the kind of C compiler we're using
  (ocaml/dune#6610, fixes ocaml/dune#6415, @emillon)

- Allow `(include_subdirs qualified)` for OCaml projects. (ocaml/dune#6594, fixes ocaml/dune#1084,
  @rgrinberg)

- Accurately determine merlin configuration for all sources selected with
  `copy#` and `copy_files#`. The old heuristic of looking for a module in
  parent directories is removed (ocaml/dune#6594, @rgrinberg)

- Fix inline tests with *js_of_ocaml* and whole program compilation mode
  enabled (ocaml/dune#6645, @hhugo)

- Fix *js_of_ocaml* separate compilation rules when `--enable=effects`
  ,`--enable=use-js-string` or `--toplevel` is used. (ocaml/dune#6714, ocaml/dune#6828, ocaml/dune#6920, @hhugo)

- Fix *js_of_ocaml* separate compilation in presence of linkall (ocaml/dune#6832, ocaml/dune#6916, @hhugo)

- Remove spurious build dir created when running `dune init proj ...` (ocaml/dune#6707,
  fixes ocaml/dune#5429, @gridbugs)

- Allow `--sandbox` to affect `ocamldep` invocations. Previously, they were
  wrongly marked as incompatible (ocaml/dune#6749, @rgrinberg)

- Validate the command line arguments for `$ dune ocaml top-module`. This
  command requires one positional argument (ocaml/dune#6796, fixes ocaml/dune#6793, @rgrinberg)

- Add a `dune cache size` command for displaying the size of the cache (ocaml/dune#6638,
  @Alizter)

- Add 4.14.0 MSVC to CI (ocaml/dune#6917, @jonahbeckford)

- Fix dependency cycle when installing files to the bin section with
  `glob_files` (ocaml/dune#6764, fixes ocaml/dune#6708, @gridbugs)

- Handle "Too many links" errors when using Dune cache on Windows (ocaml/dune#6993, @nojb)
@emillon emillon mentioned this pull request Feb 17, 2023
Merged
emillon added a commit to emillon/opam-repository that referenced this pull request Feb 17, 2023
@emillon
[new release] xdg, stdune, ordering, ocamlc-loc, dyn, dune, dune-site…
c5fc79e 
…, dune-rpc, dune-rpc-lwt, dune-private-libs, dune-glob, dune-configurator, dune-build-info, dune-action-plugin and chrome-trace (3.7.0)

CHANGES:

- Allow running `$ dune exec` in watch mode (with the `-w` flag). In watch mode,
  `$ dune exec` the executed binary whenever it is recompiled. (ocaml/dune#6966,
  @gridbugs)

- `coqdep` is now called once per theory, instead of one time per Coq
  file. This should significantly speed up some builds, as `coqdep`
  startup time is often heavy (ocaml/dune#7048, @Alizter, @ejgallego)

- Add `map_workspace_root` dune-project stanza to allow disabling of
  mapping of workspace root to `/workspace_root`. (ocaml/dune#6988, fixes ocaml/dune#6929,
  @richardlford)

- Fix handling of support files generated by odoc. (ocaml/dune#6913, @jonludlam)

- Fix parsing of OCaml errors that contain code excerpts with `...` in them.
  (ocaml/dune#7008, @rgrinberg)

- Pre-emptively clear screen in watch mode (ocaml/dune#6987, fixes ocaml/dune#6884, @rgrinberg)

- Fix cross compilation configuration when a context with targets is itself a
  host of another context (ocaml/dune#6958, fixes ocaml/dune#6843, @rgrinberg)

- Fix parsing of the `<=` operator in *blang* expressions of `dune` files.
  Previously, the operator would be interpreted as `<`. (ocaml/dune#6928, @tatchi)

- Fix `--trace-file` output. Dune now emits a single *complete* event for every
  executed process. Unterminated *async* events are no longer written. (ocaml/dune#6892,
  @rgrinberg)

- Fix preprocessing with `staged_pps` (ocaml/dune#6748, fixes ocaml/dune#6644, @rgrinberg)

- Use colored output with MDX when Dune colors are enabled.
  (ocaml/dune#6462, @MisterDA)

- Make `dune describe workspace` return consistent dependencies for
  executables and for libraries. By default, compile-time dependencies
  towards PPX-rewriters are from now not taken into account (but
  runtime dependencies always are). Compile-time dependencies towards
  PPX-rewriters can be taken into account by providing the
  `--with-pps` flag. (ocaml/dune#6727, fixes ocaml/dune#6486, @esope)

- Print missing newline after `$ dune exec`. (ocaml/dune#6821, fixes ocaml/dune#6700, @rgrinberg,
  @Alizter)

- Fix binary corruption when installing or promoting in parallel (ocaml/dune#6669, fixes
  ocaml/dune#6668, @edwintorok)

- Use colored output with GCC and Clang when compiling C stubs. The
  flag `-fdiagnostics-color=always` is added to the `:standard` set of
  flags. (ocaml/dune#4083, @MisterDA)

- Fix the parsing of decimal and hexadecimal escape literals in `dune`,
  `dune-package`, and other dune s-expression based files (ocaml/dune#6710, @shym)

- Report an error if `dune init ...` would create a "dune" file in a location
  which already contains a "dune" directory (ocaml/dune#6705, @gridbugs)

- Fix the parsing of alerts. They will now show up in diagnostics correctly.
  (ocaml/dune#6678, @rginberg)

- Fix the compilation of modules generated at link time when
  `implicit_transitive_deps` is enabled (ocaml/dune#6642, @rgrinberg)

- Allow `$ dune utop` to load libraries defined in data only directories
  defined using `(subdir ..)` (ocaml/dune#6631, @rgrinberg)

- Format dune files when they are named `dune-file`. This occurs when we enable
  the alternative file names project option. (ocaml/dune#6566, @rgrinberg)

- Move `$ dune ocaml-merlin -dump-config=$dir` to `$ dune ocaml merlin
  dump-config $dir`. (ocaml/dune#6547, @rgrinberg)

- Allow compilation rules to be impacted by `(env ..)` stanzas that modify the
  environment or set binaries. (ocaml/dune#6527, @rgrinberg)

- Coq native mode is now automatically detected by Dune starting with Coq lang
  0.7. `(mode native)` has been deprecated in favour of detection from the
  configuration of Coq. (ocaml/dune#6409, @Alizter)

- Print "Leaving Directory" whenever "Entering Directory" is printed. (ocaml/dune#6419,
  fixes ocaml/dune#138, @cpitclaudel, @rgrinberg)

- Allow `$ dune ocaml dump-dot-merlin` to run in watch mode. Also this command
  shouldn't print "Entering Directory" mesages. (ocaml/dune#6497, @rgrinberg)

- `dune clean` should no longer fail under Windows due to the inability to
  remove the `.lock` file. Also, bring the implementation of the global lock
  under Windows closer to that of Unix. (ocaml/dune#6523, @nojb)

- Remove "Entering Directory" messages for `$ dune install`. (ocaml/dune#6513,
  @rgrinberg)

- Stop passing `-q` flag in `dune coq top`, which allows for `.coqrc` to be
  loaded. (ocaml/dune#6848, fixes ocaml/dune#6847, @Alizter)

- Fix missing dependencies when detecting the kind of C compiler we're using
  (ocaml/dune#6610, fixes ocaml/dune#6415, @emillon)

- Allow `(include_subdirs qualified)` for OCaml projects. (ocaml/dune#6594, fixes ocaml/dune#1084,
  @rgrinberg)

- Accurately determine merlin configuration for all sources selected with
  `copy#` and `copy_files#`. The old heuristic of looking for a module in
  parent directories is removed (ocaml/dune#6594, @rgrinberg)

- Fix inline tests with *js_of_ocaml* and whole program compilation mode
  enabled (ocaml/dune#6645, @hhugo)

- Fix *js_of_ocaml* separate compilation rules when `--enable=effects`
  ,`--enable=use-js-string` or `--toplevel` is used. (ocaml/dune#6714, ocaml/dune#6828, ocaml/dune#6920, @hhugo)

- Fix *js_of_ocaml* separate compilation in presence of linkall (ocaml/dune#6832, ocaml/dune#6916, @hhugo)

- Remove spurious build dir created when running `dune init proj ...` (ocaml/dune#6707,
  fixes ocaml/dune#5429, @gridbugs)

- Allow `--sandbox` to affect `ocamldep` invocations. Previously, they were
  wrongly marked as incompatible (ocaml/dune#6749, @rgrinberg)

- Validate the command line arguments for `$ dune ocaml top-module`. This
  command requires one positional argument (ocaml/dune#6796, fixes ocaml/dune#6793, @rgrinberg)

- Add a `dune cache size` command for displaying the size of the cache (ocaml/dune#6638,
  @Alizter)

- Fix dependency cycle when installing files to the bin section with
  `glob_files` (ocaml/dune#6764, fixes ocaml/dune#6708, @gridbugs)

- Handle "Too many links" errors when using Dune cache on Windows (ocaml/dune#6993, @nojb)

- Allow the `cinaps` stanza to set a custom alias. By default, if the alias is
  not set then the cinaps actions will be attached to both `@cinaps` and
  `@runtest` (ocaml/dune#6991, @rgrinberg)

- Add `(using ctypes 0.3)`. When used, paths in `(ctypes)` are interpreted
  relative to where the stanza is defined. (ocaml/dune#6883, fixes ocaml/dune#5325, @emillon)

- Auto-detect `dune-workspace` files as `dune` files in Emacs (ocaml/dune#7061,
  @ilankri)

- Add native support for polling mode on Windows (ocaml/dune#7010, @yams-yams, @nojb)
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hhugo commented Mar 14, 2023

FYI, Jsoo 5.1 has just been released. Users will exercise the new behavior implemented in this PR as soon as they upgrade jsoo.

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