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Working version
----------------
### Language features:
- #10013: Let-punning
Allow 'let* x in ...' and 'let%ext x in ...' as shorthand for
'let* x = x in ...' and 'let%ext x = x in ...' respectively.
(Stephen Dolan, review by Gabriel Scherer)
### Type system:
- #10174: Make Tsubst more robust by avoiding strange workarounds
(Takafumi Saikawa and Jacques Garrigue, review by Gabriel Scherer and
Florian Angeletti)
### Runtime system:
- #9284: Add -config option to display the configuration of ocamlrun on stdout,
including the search path for shared stub libraries.
(David Allsopp, review by Xavier Leroy)
- #10025: Track custom blocks (e.g. Bigarray) with Statmemprof
(Stephen Dolan, review by Leo White, Gabriel Scherer and Jacques-Henri
Jourdan)
- #10102: Ignore PROFINFO_WIDTH if WITH_PROFINFO is not defined (technically
a breaking change if the configuration system was being abused before).
(David Allsopp, review by Xavier Leroy)
* #10098: Improve command-line parsing in ocamlrun: strictly recognise options,
be more informative for `ocamlrun -I` and support `--` for terminating options
parsing.
(David Allsopp, review by Xavier Leroy)
- #10101: Add -help/--help option to ocamlrun.
(David Allsopp, review by Xavier Leroy)
- #10136: Minor clean-ups in runtime/io.c and runtime/caml/io.h
(Xavier Leroy, review by David Allsopp and Guillaume Munch-Maccagnoni)
### Code generation and optimizations:
- #9876: do not cache the young_limit GC variable in a processor register.
This affects the ARM64, PowerPC and RISC-V ports, making signal handling
and minor GC triggers more reliable, at the cost of a small slowdown.
(Xavier Leroy, review by Nicolás Ojeda Bär)
- #9937: improvements in ARM64 code generation (constants, sign extensions)
(Xavier Leroy, review by Stephen Dolan)
### Standard library:
- #9582: Add Array.{find_opt,find_map,split,combine}.
(Nicolás Ojeda Bär, review by Daniel Bünzli and Gabriel Scherer)
### Other libraries:
* #10084: Unix.open_process_args* functions now look up the program in the PATH.
This was already the case under Windows, but this is now also done under
Unix. Note that previously the program was interpreted relative to the current
directory.
(Nicolás Ojeda Bär, review by Gabriel Scherer and Xavier Leroy)
### Tools:
- #10139: Remove confusing navigation bar from stdlib documentation.
Adds a -nonavbar option to ocamldoc, and uses it to improve navigation within
the reference manual.
(John Whitington, review by David Allsopp)
### Manual and documentation:
- #9786, #10181: improved documentation of Unix.{in,out}_channel_of_descr
with respect to closing.
(Xavier Leroy, report by Jacques-Henri Jourdan, review by Guillaume
Munch-Maccagnoni, Gabriel Scherer, Jacques-Henri Jourdan)
- #10139: Remove confusing navigation bar from stdlib documentation.
Removes the 'Up', 'Previous' and 'Next' links from the top of each standard
library module's documentation.
(John Whitington, review by David Allsopp)
### Compiler user-interface and warnings:
- #9960: extend ocamlc/ocamlopt's -o option to work when compiling C files
(Sébastien Hinderer, reported by Daniel Bünzli, review by Florian
Angeletti and Gabriel Scherer)
- #10095: simplify the syntax error messages produced by the compiler.
In many cases, the compiler would produce an error message that looked
potentially helpful but was actually misguided and arguably confusing,
because the error message implicitly referred to an earlier point in
the source code than the point explicitly shown in the error message.
(François Pottier, review by Gabriel Scherer and Frédéric Bour.)
### Internal/compiler-libs changes:
- #9243, simplify parser rules for array indexing operations
(Florian Angeletti, review by Damien Doligez and Gabriel Scherer)
- #9650, #9651: keep refactoring the pattern-matching compiler
(Gabriel Scherer, review by Thomas Refis and Florian Angeletti)
- #9994: Make Types.type_expr a private type, and abstract marking mechanism
(Jacques Garrigue and Takafumi Saikawa,
review by Gabriel Scherer and Leo White)
- #10007: Driver.compile_common: when typing a .ml file, return the
compilation unit signature (inferred or from the .cmi) in addition
to the implementation and the coercion.
(Leandro Ostera, review by Gabriel Scherer and Thomas Refis)
* #10061, #10078: remove library `ocamlopttoplevel`, remove modules
`Opttoploop`, `Opttopstart`, which are replaced by `Toploop` and `Topstart` in
library `ocamltoplevel`, made available in native code.
- #10124: remove duplicated code from the native toplevel, split toplevel
implementation into the shared part (`Topcommon`, etc.) and specific ones
(`Topeval`, `Trace`, `Topmain`).
* #10086: add the commands `make list-parse-errors` and `make
generate-parse-errors` to generate a set of syntactically incorrect
sentences that covers all error states of the LR automaton. Add these
sentences to the test suite. This can be used to evaluate the quality of the
parser's syntax error messages and (in the future) to evaluate the impact of
changes in the parser.
(François Pottier, review by Gabriel Scherer and Xavier Leroy.)
- #10090: Distinguished constructors for ref variables at lambda level
(Keryan Didier, review by Gabriel Scherer and Vincent Laviron)
- #10113: add a `-timeout` option to ocamltest and use it in the test suite.
(Xavier Leroy and Gabriel Scherer, review by Sébastien Hinderer
and David Allsopp)
### Build system:
- #9191, #10091: take the LDFLAGS variable into account, except on
flexlink-using systems.
(Gabriel Scherer, review by Sébastien Hinderer and David Allsopp,
report by Ralph Seichter)
- #10063: (Re-)enable building on illumos (SmartOS, OmniOS, ...) and
Oracle Solaris; x86_64/GCC and 64-bit SPARC/Sun PRO C compilers.
(partially revert #2024).
(Tõivo Leedjärv and Konstantin Romanov,
review by Gabriel Scherer, Sébastien Hinderer and Xavier Leroy)
### Bug fixes:
- #10005: Try expanding aliases in Ctype.nondep_type_rec
(Stephen Dolan, review by Gabriel Scherer, Leo White and Xavier Leroy)
- #10071: Fix bug in tests/misc/weaklifetime.ml that was reported in #10055
(Damien Doligez and Gabriel Scherer, report by David Allsopp)
- #10072, #10085: Check that sizes and offsets in stack frame descriptors
do not overflow the 16-bit fields where they are stored.
(Xavier Leroy, report by Github user pveber, review by Gabriel Scherer)
- #10087, #10138: In the toplevel REPL, don't use the cache
of included directories, so that files created or deleted while
the REPL is running are correctly handled.
(Xavier Leroy, report by Github user quakerquickoats, review by
Jeremie Dimino)
- #10147, #10148: Fix building runtime with GCC on macOS.
(David Allsopp, report by John Skaller)
- #10166: Fix illegal permutation error reporting in module aliases.
(Matthew Ryan, review by Florian Angeletti)
OCaml 4.12.0
------------
### Language features:
- #1655: pattern aliases do not ignore type constraints
(Thomas Refis, review by Jacques Garrigue and Gabriel Scherer)
* #9500, #9727, #9866, #9870, #9873: Injectivity annotations
One can now mark type parameters as injective, which is useful for
abstract types:
module Vec : sig type !'a t end = struct type 'a t = 'a array end
On non-abstract types, this can be used to check the injectivity of
parameters. Since all parameters of record and sum types are by definition
injective, this only makes sense for type abbreviations:
type !'a t = 'a list
Note that this change required making the regularity check stricter.
(Jacques Garrigue, review by Jeremy Yallop and Leo White)
- #9429: Add unary operators containing `#` to the parser for use in ppx
rewriters
(Leo White, review by Damien Doligez)
### Supported platforms:
- #9699: add support for iOS and macOS on ARM 64 bits
(GitHub user @EduardoRFS, review by Xavier Leroy, Nicolás Ojeda Bär
and Anil Madhavapeddy, additional testing by Michael Schmidt)
### Type system:
* #9811: remove propagation from previous branches
Type information inferred from previous branches was propagated in
non-principal mode. Revert this for better compatibility with
-principal mode.
For the time being, infringing code should result in a principality warning.
(Jacques Garrigue, review by Thomas Refis and Gabriel Scherer)
### Runtime system:
- #2195: Improve error message in bytecode stack trace printing and load
debug information during bytecode startup if OCAMLRUNPARAM=b=2.
(David Allsopp, review by Gabriel Scherer and Xavier Leroy)
- #9756: garbage collector colors change
removes the gray color from the major gc
(Sadiq Jaffer and Stephen Dolan reviewed by Xavier Leroy,
KC Sivaramakrishnan, Damien Doligez and Jacques-Henri Jourdan)
- #1795, #9543: modernize signal handling on Linux i386, PowerPC, and s390x,
adding support for Musl ppc64le along the way.
(Xavier Leroy and Anil Madhavapeddy, review by Stephen Dolan)
- #9466: Memprof: optimize random samples generation.
(Jacques-Henri Jourdan review by Xavier Leroy and Stephen Dolan)
- #9628: Memprof: disable sampling when memprof is suspended.
(Jacques-Henri Jourdan review by Gabriel Scherer and Stephen Dolan)
- #9508: Remove support for FreeBSD prior to 4.0R, that required explicit
floating-point initialization to behave like IEEE standard
(Hannes Mehnert, review by David Allsopp)
* #9513: Selectively initialise blocks in `Obj.new_block`. Reject `Custom_tag`
objects and zero-length `String_tag` objects.
(KC Sivaramakrishnan, review by David Allsopp, Xavier Leroy, Mark Shinwell
and Leo White)
- #9564: Add a macro to construct out-of-heap block header.
(KC Sivaramakrishnan, review by Stephen Dolan, Gabriel Scherer,
and Xavier Leroy)
* #5154, #9569, #9734: Add `Val_none`, `Some_val`, `Is_none`, `Is_some`,
`caml_alloc_some`, and `Tag_some`. As these macros are sometimes defined by
authors of C bindings, this change may cause warnings/errors in case of
redefinition.
(Nicolás Ojeda Bär, review by Stephen Dolan, Gabriel Scherer, Mark Shinwell,
and Xavier Leroy)
- #8807, #9503: Use different symbols for do_local_roots on bytecode and native
(Stephen Dolan, review by David Allsopp and Xavier Leroy)
- #9619: Change representation of function closures so that code pointers
can be easily distinguished from environment variables
(Xavier Leroy, review by Mark Shinwell and Damien Doligez)
- #9634: Allow initial and repeated commas in `OCAMLRUNPARAM`.
(Nicolás Ojeda Bär, review by Gabriel Scherer)
- #9648, #9689: Update the generic hash function to take advantage
of the new representation for function closures
(Xavier Leroy, review by Stephen Dolan)
- #9649: Update the marshaler (output_value) to take advantage
of the new representation for function closures
(Xavier Leroy, review by Damien Doligez)
- #9654: More efficient management of code fragments.
(Xavier Leroy, review by Jacques-Henri Jourdan, Damien Doligez, and
Stephen Dolan)
- #9670: Report full major collections in Gc stats.
(Leo White, review by Gabriel Scherer)
- #9675: Remove the caml_static_{alloc,free,resize} primitives, now unused.
(Xavier Leroy, review by Gabriel Scherer)
- #9678: Reimplement `Obj.reachable_words` using a hash table to
detect sharing, instead of temporary in-place modifications. This
is a prerequisite for Multicore OCaml.
(Xavier Leroy, review by Jacques-Henri Jourdan and Sébastien Hinderer)
* #9697: Remove the Is_in_code_area macro and the registration of DLL code
areas in the page table, subsumed by the new code fragment management API
(Xavier Leroy, review by Jacques-Henri Jourdan)
- #9710: Drop "support" for an hypothetical JIT for OCaml bytecode
which has never existed.
(Jacques-Henri Jourdan, review by Xavier Leroy)
- #9728: Take advantage of the new closure representation to simplify the
compaction algorithm and remove its dependence on the page table
(Damien Doligez, review by Jacques-Henri Jourdan and Xavier Leroy)
- #9742, #9989: Ephemerons are now compatible with infix pointers occurring
when using mutually recursive functions.
(Jacques-Henri Jourdan, review by François Bobot)
* #1128, #7503, #9036, #9722, #10069: EINTR-based signal handling.
When a signal arrives, avoid running its OCaml handler in the middle
of a blocking section. Instead, allow control to return quickly to
a polling point where the signal handler can safely run, ensuring that
I/O locks are not held while it runs. A polling point was removed from
caml_leave_blocking_section, and one added to caml_raise.
(Stephen Dolan, review by Goswin von Brederlow, Xavier Leroy, Damien
Doligez, Anil Madhavapeddy, Guillaume Munch-Maccagnoni and Jacques-
Henri Jourdan)
- #9888, #9890: Fixes a bug in the `riscv` backend where register t0 was not
saved/restored when performing a GC. This could potentially lead to a
segfault.
(Nicolás Ojeda Bär, report by Xavier Leroy, review by Xavier Leroy)
- #9907: Fix native toplevel on native Windows.
(David Allsopp, review by Florian Angeletti)
- #9909: Remove caml_code_area_start and caml_code_area_end globals (no longer
needed as the pagetable heads towards retirement).
(David Allsopp, review by Xavier Leroy)
- #9949: Clarify documentation of GC message 0x1 and make sure it is
displayed every time a major cycle is forcibly finished.
(Damien Doligez, review by Xavier Leroy)
- #9951: Ensure that the mark stack push optimisation handles naked pointers
(KC Sivaramakrishnan, reported by Enguerrand Decorne, review by Gabriel
Scherer, and Xavier Leroy)
- #9534, #9947: Introduce a naked pointers checker mode to the runtime
(configure option --enable-naked-pointers-checker). Alarms are printed
when the garbage collector finds out-of-heap pointers that could
cause a crash in no-naked-pointers mode.
(Enguerrand Decorne, KC Sivaramakrishnan, Xavier Leroy, Stephen Dolan,
David Allsopp, Nicolás Ojeda Bär review by Xavier Leroy, Nicolás Ojeda Bär)
* #9674: Memprof: guarantee that an allocation callback is always run
in the same thread the allocation takes place
(Jacques-Henri Jourdan, review by Stephen Dolan)
- #10050: update {PUSH,}OFFSETCLOSURE* bytecode instructions to match new
representation for closures
(Nathanaël Courant, review by Xavier Leroy)
- #10056: Memprof: ensure young_trigger is within the bounds of the minor
heap in caml_memprof_renew_minor_sample (regression from #8684)
(David Allsopp, review by Guillaume Munch-Maccagnoni and
Jacques-Henri Jourdan)
- #10062: set ARCH_INT64_PRINTF_FORMAT correctly for both modes of mingw-w64
(David Allsopp, review by Xavier Leroy)
- #10107: Ensure modules compiled with -afl-instrument can still link on
platforms without AFL support.
(David Allsopp, review by Xavier Leroy)
### Code generation and optimizations:
- #9551: ocamlc no longer loads DLLs at link time to check that
external functions referenced from OCaml code are defined.
Instead, .so/.dll files are parsed directly by pure OCaml code.
(Nicolás Ojeda Bär, review by Daniel Bünzli, Gabriel Scherer,
Anil Madhavapeddy, and Xavier Leroy)
- #9620: Limit the number of parameters for an uncurried or untupled
function. Functions with more parameters than that are left
partially curried or tupled.
(Xavier Leroy, review by Mark Shinwell)
- #9752: Revised handling of calling conventions for external C functions.
Provide a more precise description of the types of unboxed arguments,
so that the ARM64 iOS/macOS calling conventions can be honored.
(Xavier Leroy, review by Mark Shinwell and Github user @EduardoRFS)
- #9838: Ensure that Cmm immediates are generated as Cconst_int where
possible, improving instruction selection.
(Stephen Dolan, review by Leo White and Xavier Leroy)
- #9864: Revised recognition of immediate arguments to integer operations.
Fixes several issues that could have led to producing assembly code
that is rejected by the assembler.
(Xavier Leroy, review by Stephen Dolan)
- #9969, #9981: Added mergeable flag to ELF sections containing mergeable
constants. Fixes compatibility with the integrated assembler in clang 11.0.0.
(Jacob Young, review by Nicolás Ojeda Bär)
### Standard library:
- #9865: add Format.pp_print_seq
(Raphaël Proust, review by Nicolás Ojeda Bär)
- #9781: add injectivity annotations to parameterized abstract types
(Jeremy Yallop, review by Nicolás Ojeda Bär)
* #9765: add init functions to Bigarray.
(Jeremy Yallop, review by Gabriel Scherer, Nicolás Ojeda Bär, and
Xavier Leroy)
* #9554: add primitive __FUNCTION__ that returns the name of the current method
or function, including any enclosing module or class.
(Nicolás Ojeda Bär, Stephen Dolan, review by Stephen Dolan)
- #9075: define to_rev_seq in Set and Map modules.
(Sébastien Briais, review by Gabriel Scherer and Nicolás Ojeda Bär)
- #9561: Unbox Unix.gettimeofday and Unix.time
(Stephen Dolan, review by David Allsopp)
- #9570: Provide an Atomic module with a trivial purely-sequential
implementation, to help write code that is compatible with Multicore
OCaml.
(Gabriel Scherer, review by Xavier Leroy)
- #10035: Make sure that flambda respects atomicity in the Atomic module.
(Guillaume Munch-Maccagnoni, review by Gabriel Scherer)
- #9571: Make at_exit and Printexc.register_printer thread-safe.
(Guillaume Munch-Maccagnoni, review by Gabriel Scherer and Xavier Leroy)
- #9066: a new Either module with
type 'a Either.t = Left of 'a | Right of 'b
(Gabriel Scherer, review by Daniel Bünzli, Thomas Refis, Jeremy Yallop)
- #9066: List.partition_map :
('a -> ('b, 'c) Either.t) -> 'a list -> 'b list * 'c list
(Gabriel Scherer, review by Jeremy Yallop)
- #9587: Arg: new Rest_all spec to get all rest arguments in a list
(this is similar to Rest, but makes it possible to detect when there
are no arguments (an empty list) after the rest marker)
(Gabriel Scherer, review by Nicolás Ojeda Bär and David Allsopp)
- #9655: Obj: introduce type raw_data and functions raw_field, set_raw_field
to manipulate out-of-heap pointers in no-naked-pointer mode,
and more generally all other data that is not a well-formed OCaml value
(Xavier Leroy, review by Damien Doligez and Gabriel Scherer)
- #9533: Added String.starts_with and String.ends_with.
(Bernhard Schommer, review by Daniel Bünzli, Gabriel Scherer and
Alain Frisch)
- #9663: Extend Printexc API for raw backtrace entries.
(Stephen Dolan, review by Nicolás Ojeda Bär and Gabriel Scherer)
* #9668: List.equal, List.compare
(This could break code using "open List" by shadowing
Stdlib.{equal,compare}.)
(Gabriel Scherer, review by Nicolás Ojeda Bär, Daniel Bünzli and Alain Frisch)
- #9763: Add function Hashtbl.rebuild to convert from old hash table
formats (that may have been saved to persistent storage) to the
current hash table format. Remove leftover support for the hash
table format and generic hash function that were in use before OCaml 4.00.
(Xavier Leroy, review by Nicolás Ojeda Bär)
- #9797: Add Sys.mkdir and Sys.rmdir.
(David Allsopp, review by Nicolás Ojeda Bär, Sébastien Hinderer and
Xavier Leroy)
- #10070: Fix Float.Array.blit when source and destination arrays coincide.
(Nicolás Ojeda Bär, review by Alain Frisch and Xavier Leroy)
### Other libraries:
- #8796: On Windows, make Unix.utimes use FILE_FLAG_BACKUP_SEMANTICS flag
to allow it to work with directories.
(Daniil Baturin, review by Damien Doligez)
* #9206, #9419: update documentation of the threads library;
deprecate Thread.kill, Thread.wait_read, Thread.wait_write,
and the whole ThreadUnix module.
(Xavier Leroy, review by Florian Angeletti, Guillaume Munch-Maccagnoni,
and Gabriel Scherer)
- #9573: reimplement Unix.create_process and related functions without
Unix.fork, for better efficiency and compatibility with threads.
(Xavier Leroy, review by Gabriel Scherer and Anil Madhavapeddy)
- #9575: Add Unix.is_inet6_addr
(Nicolás Ojeda Bär, review by Xavier Leroy)
- #9593: Use new flag for non-elevated symbolic links and test for Developer
Mode on Windows
(Manuel Hornung, review by David Allsopp and Nicolás Ojeda Bär)
* #9601: Return EPERM for EUNKNOWN -1314 in win32unix (principally affects
error handling when Unix.symlink is unavailable)
(David Allsopp, review by Xavier Leroy)
- #9338, #9790: Dynlink: make sure *_units () functions report accurate
information before the first load.
(Daniel Bünzli, review by Xavier Leroy and Nicolás Ojeda Bär)
* #9757, #9846, #10161: check proper ownership when operating over mutexes.
Now, unlocking a mutex held by another thread or not locked at all
reliably raises a Sys_error exception. Before, it was undefined
behavior, but the documentation did not say so.
Likewise, locking a mutex already locked by the current thread
reliably raises a Sys_error exception. Before, it could
deadlock or succeed (and do recursive locking), depending on the OS.
(Xavier Leroy, report by Guillaume Munch-Maccagnoni, review by
Guillaume Munch-Maccagnoni, David Allsopp, and Stephen Dolan)
- #9802: Ensure signals are handled before Unix.kill returns
(Stephen Dolan, review by Jacques-Henri Jourdan)
- #9869, #10073: Add Unix.SO_REUSEPORT
(Yishuai Li, review by Xavier Leroy, amended by David Allsopp)
- #9906, #9914: Add Unix._exit as a way to exit the process immediately,
skipping any finalization action
(Ivan Gotovchits and Xavier Leroy, review by Sébastien Hinderer and
David Allsopp)
- #9930: new module Semaphore in the thread library, implementing
counting semaphores and binary semaphores
(Xavier Leroy, review by Daniel Bünzli and Damien Doligez,
additional suggestions by Stephen Dolan and Craig Ferguson)
- #9958: Raise exception in case of error in Unix.setsid.
(Nicolás Ojeda Bär, review by Stephen Dolan)
- #9971, #9973: Make sure the process can terminate when the last thread
calls Thread.exit.
(Xavier Leroy, report by Jacques-Henri Jourdan, review by David Allsopp
and Jacques-Henri Jourdan).
### Tools:
- #9551: ocamlobjinfo is now able to display information on .cmxs shared
libraries natively; it no longer requires libbfd to do so
(Nicolás Ojeda Bär, review by Daniel Bünzli, Gabriel Scherer,
Anil Madhavapeddy, and Xavier Leroy)
- #9606, #9635, #9637: fix performance regression in the debugger
(behaviors quadratic in the size of the debugged program)
(Xavier Leroy, report by Jacques Garrigue and Virgile Prevosto,
review by David Allsopp and Jacques-Henri Jourdan)
* #9299, #9795: ocamldep: do not process files during cli parsing. Fixes
various broken cli behaviours.
(Daniel Bünzli, review by Nicolás Ojeda Bär)
### Debugging and profiling:
- #9948: Remove Spacetime.
(Nicolás Ojeda Bär, review by Stephen Dolan and Xavier Leroy)
### Manual and documentation:
- #9468: HACKING.adoc: using dune to get merlin's support
(Thomas Refis, review by Gabriel Scherer)
- #9745: Manual: Standard Library labeled and unlabeled documentation unified
(John Whitington, review by Nicolás Ojeda Bär, David Allsopp,
Thomas Refis, and Florian Angeletti)
- #9877: manual, warn that multi-index indexing operators should be defined in
conjunction of single-index ones.
(Florian Angeletti, review by Hezekiah M. Carty, Gabriel Scherer,
and Marcello Seri)
- #9755: Manual: post-processing the html generated by ocamldoc and
hevea. Improvements on design and navigation, including a mobile
version, and a quick-search functionality for the API.
(San Vũ Ngọc, review by David Allsopp and Florian Angeletti)
- #10142, #10154: improved rendering and latex code for toplevel code examples.
(Florian Angeletti, report by John Whitington, review by Gabriel Scherer)
### Compiler user-interface and warnings:
- #1931: rely on levels to enforce principality in patterns
(Thomas Refis and Leo White, review by Jacques Garrigue)
* #9011: Do not create .a/.lib files when creating a .cmxa with no modules.
macOS ar doesn't support creating empty .a files (#1094) and MSVC doesn't
permit .lib files to contain no objects. When linking with a .cmxa containing
no modules, it is now not an error for there to be no .a/.lib file.
(David Allsopp, review by Xavier Leroy)
- #9560: Report partial application warnings on type errors in applications.
(Stephen Dolan, report and testcase by whitequark, review by Gabriel Scherer
and Thomas Refis)
- #9583: when bytecode linking fails due to an unavailable module, the module
that requires it is now included in the error message.
(Nicolás Ojeda Bär, review by Vincent Laviron)
- #9615: Attach package type attributes to core_type.
When parsing constraints on a first class module, attributes found after the
module type were parsed but ignored. Now they are attached to the
corresponding core_type.
(Etienne Millon, review by Thomas Refis)
- #6633, #9673: Add hint when a module is used instead of a module type or
when a module type is used instead of a module or when a class type is used
instead of a class.
(Xavier Van de Woestyne, report by whitequark, review by Florian Angeletti
and Gabriel Scherer)
- #9754: allow [@tailcall true] (equivalent to [@tailcall]) and
[@tailcall false] (warns if on a tailcall)
(Gabriel Scherer, review by Nicolás Ojeda Bär)
- #9657: Warnings can now be referred to by their mnemonic name. The names are
displayed using `-warn-help` and can be utilized anywhere where a warning list
specification is expected, e.g. `[@@@ocaml.warning ...]`.
(Nicolás Ojeda Bär, review by Gabriel Scherer, Florian Angeletti and Leo
White)
- #9751: Add warning 68. Pattern-matching depending on mutable state
prevents the remaining arguments from being uncurried.
(Hugo Heuzard, review by Leo White)
- #9783: Widen warning 16 to more cases.
(Leo White, review by Florian Angeletti)
- #10008: Improve error message for aliases to the current compilation unit.
(Leo White, review by Gabriel Scherer)
- #10046: Link all DLLs with -static-libgcc on mingw32 to prevent dependency
on libgcc_s_sjlj-1.dll with mingw-w64 runtime 8.0.0 (previously this was
only needed for dllunix.dll).
(David Allsopp, report by Andreas Hauptmann, review by Xavier Leroy)
### Internal/compiler-libs changes:
- #8987: Make some locations more accurate
(Thomas Refis, review by Gabriel Scherer)
- #9216: add Lambda.duplicate which refreshes bound identifiers
(Gabriel Scherer, review by Pierre Chambart and Vincent Laviron)
- #9376: Remove spurious Ptop_defs from #use
(Leo White, review by Damien Doligez)
- #9464, #9493, #9520, #9563, #9599, #9608, #9647: refactor
the pattern-matching compiler
(Thomas Refis and Gabriel Scherer, review by Florian Angeletti)
- #9604: refactoring of the ocamltest codebase.
(Nicolás Ojeda Bär, review by Gabriel Scherer and Sébastien Hinderer)
- #9498, #9511: make the pattern-matching analyzer more robust to
or-pattern explosion, by stopping after the first counter-example to
exhaustivity
(Gabriel Scherer, review by Luc Maranget, Thomas Refis and Florian Angeletti,
report by Alex Fedoseev through Hongbo Zhang)
- #9514: optimize pattern-matching exhaustivity analysis in the single-row case
(Gabriel Scherer, review by Stephen DOlan)
- #9442: refactor the implementation of the [@tailcall] attribute
to allow for a structured attribute payload
(Gabriel Scherer, review by Vladimir Keleshev and Nicolás Ojeda Bär)
- #9684: document in address_class.h the runtime value model in
naked-pointers and no-naked-pointers mode
(Xavier Leroy and Gabriel Scherer)
- #9696: ocamltest now shows its log when a test fails. In addition, the log
contains the output of executed programs.
(Nicolás Ojeda Bär, review by David Allsopp, Sébastien Hinderer and Gabriel
Scherer)
- #9688: Expose the main entrypoint in compilerlibs
(Stephen Dolan, review by Nicolás Ojeda Bär, Greta Yorsh and David Allsopp)
- #9715: recheck scope escapes after normalising paths
(Matthew Ryan, review by Gabriel Scherer and Thomas Refis)
- #9778: Fix printing for bindings where polymorphic type annotations and
attributes are present.
(Matthew Ryan, review by Nicolás Ojeda Bär)
- #9797, #9849: Eliminate the routine use of external commands in ocamltest.
ocamltest no longer calls the mkdir, rm and ln external commands (at present,
the only external command ocamltest uses is diff).
(David Allsopp, review by Nicolás Ojeda Bär, Sébastien Hinderer and
Xavier Leroy)
- #9801: Don't ignore EOL-at-EOF differences in ocamltest.
(David Allsopp, review by Damien Doligez, much input and thought from
Daniel Bünzli, Damien Doligez, Sébastien Hinderer, and Xavier Leroy)
- #9889: more caching when printing types with -short-path.
(Florian Angeletti, review by Gabriel Scherer)
- #9591: fix pprint of polyvariants that start with a core_type, closed,
not low (Chet Murthy, review by Florian Angeletti)
- #9590: fix pprint of extension constructors (and exceptions) that rebind
(Chet Murthy, review by octachron@)
- #8939: Command-line option to save Linear IR before emit.
(Greta Yorsh, review by Mark Shinwell, Sébastien Hinderer and Frédéric Bour)
- #9003: Start compilation from Emit when the input file is in Linear IR format.
(Greta Yorsh, review by Jérémie Dimino, Gabriel Scherer and Frédéric Bour)
- #9963: Centralized tracking of frontend's global state
(Frédéric Bour and Thomas Refis, review by Gabriel Scherer)
- #9631: Named text sections for caml_system__code_begin/end symbols
(Greta Yorsh, review by Frédéric Bour)
- #9896: Share the strings representing scopes, fixing some regression
on .cmo/.cma sizes
(Alain Frisch and Xavier Clerc, review by Gabriel Scherer)
### Build system:
- #7121, #9558: Always the autoconf-discovered ld in PACKLD. For
cross-compilation, this means the triplet-prefixed version will always be
used.
(David Allsopp, report by Adrian Nader, review by Sébastien Hinderer)
- #9332, #9518, #9529: Cease storing C dependencies in the codebase. C
dependencies are generated on-the-fly in development mode. For incremental
compilation, the MSVC ports require GCC to be present.
(David Allsopp, review by Sébastien Hinderer, YAML-fu by Stephen Dolan)
- #9527: stop including configuration when running 'clean' rules
to avoid C dependency recomputation.
(Gabriel Scherer, review by David Allsopp)
- #9804: Build C stubs of libraries in otherlibs/ with debug info.
(Stephen Dolan, review by Sébastien Hinderer and David Allsopp)
- #9824, #9837: Honour the CFLAGS and CPPFLAGS variables.
(Sébastien Hinderer, review by David Allsopp)
- #9938, #9939: Define __USE_MINGW_ANSI_STDIO=0 for the mingw-w64 ports to
prevent their C99-compliant snprintf conflicting with ours.
(David Allsopp, report by Michael Soegtrop, review by Xavier Leroy)
- #9895, #9523: Avoid conflict with C++20 by not installing VERSION to the OCaml
Standard Library directory.
(Bernhard Schommer, review by David Allsopp)
- #10044: Always report the detected ARCH, MODEL and SYSTEM, even for bytecode-
only builds (fixes a "configuration regression" from 4.08 for the Windows
builds)
(David Allsopp, review by Xavier Leroy)
### Bug fixes:
- #7538, #9669: Check for misplaced attributes on module aliases
(Leo White, report by Thomas Leonard, review by Florian Angeletti)
- #7813, #9955: make sure the major GC cycle doesn't get stuck in Idle state
(Damien Doligez, report by Anders Fugmann, review by Jacques-Henri Jourdan)
- #7902, #9556: Type-checker infers recursive type, even though -rectypes is
off.
(Jacques Garrigue, report by Francois Pottier, review by Leo White)
- #8746: Hashtbl: Restore ongoing traversal status after filter_map_inplace
(Mehdi Bouaziz, review by Alain Frisch)
- #8747, #9709: incorrect principality warning on functional updates of records
(Jacques Garrigue, report and review by Thomas Refis)
* #8907, #9878: `Typemod.normalize_signature` uses wrong environment
(Jacques Garrigue, report and review by Leo White)
- #9421, #9427: fix printing of (::) in ocamldoc
(Florian Angeletti, report by Yawar Amin, review by Damien Doligez)
- #9440: for a type extension constructor with parameterised arguments,
REPL displayed <poly> for each as opposed to the concrete values used.
(Christian Quinn, review by Gabriel Scherer)
- #9433: Fix package constraints for module aliases
(Leo White, review by Jacques Garrigue)
- #9469: Better backtraces for lazy values
(Leo White, review by Nicolás Ojeda Bär)
- #9521, #9522: correctly fail when comparing functions
with Closure and Infix tags.
(Gabriel Scherer and Jeremy Yallop and Xavier Leroy,
report by Twitter user @st_toHKR through Jun Furuse)
- #9611: maintain order of load path entries in various situations: when passing
them to system linker, ppx contexts, etc.
(Nicolás Ojeda Bär, review by Jérémie Dimino and Gabriel Scherer)
- #9633: ocamltest: fix a bug when certain variables set in test scripts would
be ignored (eg `ocamlrunparam`).
(Nicolás Ojeda Bär, review by Sébastien Hinderer)
- #9681, #9690, #9693: small runtime changes
for the new closure representation (#9619)
(Xavier Leroy, Sadiq Jaffer, Gabriel Scherer,
review by Xavier Leroy and Jacques-Henri Jourdan)
- #9739, #9747: Avoid calling type variables, types that are not variables in
recursive occurrence error messages
(for instance, "Type variable int occurs inside int list")
(Florian Angeletti, report by Stephen Dolan, review by Armaël Guéneau)
- #9759, #9767: Spurious GADT ambiguity without -principal
(Jacques Garrigue, report by Thomas Refis,
review by Thomas Refis and Gabriel Scherer)
- #9799, #9803: pat_env points to the correct environment
(Thomas Refis, report by Alex Fedoseev, review by Gabriel Scherer)
- #9825, #9830: the C global variable caml_fl_merge and the C function
caml_spacetime_my_profinfo (bytecode version) were declared and
defined with different types. This is undefined behavior and
cancause link-time errors with link-time optimization (LTO).
(Xavier Leroy, report by Richard Jones, review by Nicolás Ojeda Bär)
- #9753: fix build for Android
(Github user @EduardoRFS, review by Xavier Leroy)
- #9848, #9855: Fix double free of bytecode in toplevel
(Stephen Dolan, report by Sampsa Kiiskinen, review by Gabriel Scherer)
- #9858, #9861: Compiler fails with Ctype.Nondep_cannot_erase exception
(Thomas Refis, report by @pveber, review by Florian Angeletti)
- #9860: wrong range constraint for subtract immediate on zSystems / s390x
(Xavier Leroy, review by Stephen Dolan)
- #9868, #9872, #9892: bugs in {in,out}_channel_length and seek_in
for files opened in text mode under Windows
(Xavier Leroy, report by Alain Frisch, review by Nicolás Ojeda Bär
and Alain Frisch)
- #9925: Correct passing -fdebug-prefix-map to flexlink on Cygwin by prefixing
it with -link.
(David Allsopp, review by Xavier Leroy)
- #9927: Restore Cygwin64 support.
(David Allsopp, review by Xavier Leroy)
- #9940: Fix unboxing of allocated constants from other compilation units
(Vincent Laviron, report by Stephen Dolan, review by Xavier Leroy and
Stephen Dolan)
- #9991: Fix reproducibility for `-no-alias-deps`
(Leo White, review by Gabriel Scherer and Florian Angeletti)
- #9998: Use Sys.opaque_identity in CamlinternalLazy.force
This removes extra warning 59 messages when compiling afl-instrumented
code with flambda -O3.
(Vincent Laviron, report by Louis Gesbert, review by Gabriel Scherer and
Pierre Chambart)
- #9999: fix -dsource printing of the pattern (`A as x | (`B as x)).
(Gabriel Scherer, report by Anton Bachin, review by Florian Angeletti)
- #9970, #10010: fix the declaration scope of extensible-datatype constructors.
A regression that dates back to 4.08 makes extensible-datatype constructors
with inline records very fragile, for example:
type 'a t += X of {x : 'a}
(Gabriel Scherer, review by Thomas Refis and Leo White,
report by Nicolás Ojeda Bär)
- #10048: Fix bug with generalized local opens.
(Leo White, review by Thomas Refis)
- #10106, #10112: some expected-type explanations where forgotten
after some let-bindings
(Gabriel Scherer, review by Thomas Refis and Florian Angeletti,
report by Daniil Baturin)
OCaml 4.11 maintenance branch
-----------------------------
### Bug fixes:
- #9096, #10096: fix a 4.11.0 performance regression in classes/objects
declared within a function
(Gabriel Scherer, review by Leo White, report by Sacha Ayoun)
OCaml 4.11.1 (31 August 2020)
-----------------------------
### Bug fixes:
- #9856, #9857: Prevent polymorphic type annotations from generalizing
weak polymorphic variables.
(Leo White, review by Jacques Garrigue)
- #9859, #9862: Remove an erroneous assertion when inferred function types
appear in the right hand side of an explicit :> coercion
(Florian Angeletti, review by Thomas Refis)
OCaml 4.11.0 (19 August 2020)
-----------------------------
(Changes that can break existing programs are marked with a "*")
### Runtime system:
- #9096: Print function names in backtraces.
Old output:
> Called from file "foo.ml", line 16, characters 42-53
New output:
> Called from Foo.bar in file "foo.ml", line 16, characters 42-53
(Stephen Dolan, review by Leo White and Mark Shinwell)
- #9082: The instrumented runtime now records logs in the CTF format.
A new API is available in the runtime to collect runtime statistics,
replacing the previous instrumented runtime macros.
Gc.eventlog_pause and Gc.eventlog_resume were added to allow user to control
instrumentation in a running program.
See the manual for more information on how to use this instrumentation mode.
(Enguerrand Decorne and Stephen Dolan, with help and review from
David Allsopp, Sébastien Hinderer, review by Anil Madhavapeddy,
Nicolás Ojeda Bär, Shakthi Kannan, KC Sivaramakrishnan, Gabriel Scherer,
Guillaume Munch-Maccagnoni, Damien Doligez, Leo White, Daniel Bünzli
and Xavier Leroy)
- #9230, #9362: Memprof support for native allocations.
(Jacques-Henri Jourdan and Stephen Dolan, review by Gabriel Scherer)
- #8920, #9238, #9239, #9254, #9458: New API for statistical memory profiling
in Memprof.Gc. The new version does no longer use ephemerons and allows
registering callbacks for promotion and deallocation of memory
blocks.
The new API no longer gives the block tags to the allocation callback.
(Stephen Dolan and Jacques-Henri Jourdan, review by Damien Doligez
and Gabriel Scherer)
- #9353: Reimplement `output_value` and the `Marshal.to_*` functions
using a hash table to detect sharing, instead of temporary in-place
modifications. This is a prerequisite for Multicore OCaml.
(Xavier Leroy and Basile Clément, review by Gabriel Scherer and
Stephen Dolan)
- #9119: Make [caml_stat_resize_noexc] compatible with the [realloc]
API when the old block is NULL.
(Jacques-Henri Jourdan, review by Xavier Leroy)
- #9233: Restore the bytecode stack after an allocation.
(Stephen Dolan, review by Gabriel Scherer and Jacques-Henri Jourdan)
- #9249: restore definition of ARCH_ALIGN_INT64 in m.h if the architecture
requires 64-bit integers to be double-word aligned (autoconf regression)
(David Allsopp, review by Sébastien Hinderer)
- #9259: Made `Ephemeron.blit_key` and `Weak.blit` faster. They are now
linear in the size of the range being copied instead of depending on the
total sizes of the ephemerons or weak arrays involved.
(Arseniy Alekseyev, design advice by Leo White, review by François Bobot
and Damien Doligez)
- #9279: Memprof optimisation.
(Stephen Dolan, review by Jacques-Henri Jourdan)
- #9280: Micro-optimise allocations on amd64 to save a register.
(Stephen Dolan, review by Xavier Leroy)
- #9426: build the Mingw ports with higher levels of GCC optimization
(Xavier Leroy, review by Sébastien Hinderer)
* #9483: Remove accidental inclusion of <stdio.h> in <caml/misc.h>
The only release with the inclusion of stdio.h has been 4.10.0
(Christopher Zimmermann, review by Xavier Leroy and David Allsopp)
- #9282: Make Cconst_symbol have typ_int to fix no-naked-pointers mode.
(Stephen Dolan, review by Mark Shinwell, Xavier Leroy and Vincent Laviron)
- #9497: Harmonise behaviour between bytecode and native code for
recursive module initialisation in one particular case (fixes #9494).
(Mark Shinwell, David Allsopp, Vincent Laviron, Xavier Leroy,
Geoff Reedy, original bug report by Arlen Cox)
- #8791: use a variable-length encoding when marshalling bigarray dimensions,
avoiding overflow.
(Jeremy Yallop, Stephen Dolan, review by Xavier Leroy)
### Code generation and optimizations:
- #9441: Add RISC-V RV64G native-code backend.
(Nicolás Ojeda Bär, review by Xavier Leroy and Gabriel Scherer)
- #9316, #9443, #9463, #9782: Use typing information from Clambda
for mutable Cmm variables.
(Stephen Dolan, review by Vincent Laviron, Guillaume Bury, Xavier Leroy,
and Gabriel Scherer; temporary bug report by Richard Jones)
- #8637, #8805, #9247, #9296: Record debug info for each allocation.
(Stephen Dolan and Jacques-Henri Jourdan, review by Damien Doligez,
KC Sivaramakrishnan and Xavier Leroy)
- #9193: Make tuple matching optimisation apply to Lswitch and Lstringswitch.
(Stephen Dolan, review by Thomas Refis and Gabriel Scherer)