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Working version
---------------
(Changes that can break existing programs are marked with a "*")
### Language features
- #7557, #1726: multi-indices for extended indexing operators
(Florian Angeletti, review by Gabriel Radanne)
### Internal/compiler-libs changes:
- #8844: Printing faulty constructors, inline records fields and their types
during type mismatches. Also slightly changed other type mismatches error
output.
(Mekhrubon Turaev, review by Florian Angeletti, Leo White)
- #8828: Added abstractions for variants, records, constructors, fields and
extension constructor types mismatch.
(Mekhrubon Turaev, review by Florian Angeletti, Leo White and Gabriel Scherer)
- #7927, #8527: Replace long tuples into records in typeclass.ml
(Ulugbek Abdullaev, review by David Allsopp and Gabriel Scherer)
- #1901: Fix lexing of character literals in comments
(Pieter Goetschalckx, review by Damien Doligez)
- #2288: Move middle end code from [Asmgen] to [Clambda_middle_end] and
[Flambda_middle_end]. Run [Un_anf] from the middle end, not [Cmmgen].
(Mark Shinwell, review by Pierre Chambart)
- #8692: Remove Misc.may_map and similar
(Leo White, review by Gabriel Scherer and Thomas Refis)
- #8677: Use unsigned comparisons in amd64 and i386 emitter of Lcondbranch3.
(Greta Yorsh, review by Xavier Leroy)
- #8766: Parmatch: introduce a type for simplified pattern heads
(Gabriel Scherer and Thomas Refis, review by Stephen Dolan and
Florian Angeletti)
- #8774: New implementation of Env.make_copy_of_types
(Alain Frisch, review by Thomas Refis, Leo White and Jacques Garrigue)
- #7924: Use a variant instead of an int in Bad_variance exception
(Rian Douglas, review by Gabriel Scherer)
- #8890: in -dtimings output, show time spent in C linker clearly
(Valentin Gatien-Baron)
- #8913: ocamltest: improve 'promote' implementation to take
skipped lines/bytes into account
(Gabriel Scherer, review by Sébastien Hinderer)
### Code generation and optimizations:
- #8672: Optimise Switch code generation on booleans.
(Stephen Dolan, review by Pierre Chambart)
- #2322: Add pseudo-instruction `Ladjust_trap_depth` to replace
dummy Lpushtrap generated in linearize
(Greta Yorsh and Vincent Laviron, review by Xavier Leroy)
- #8707: Simplif: more regular treatment of Tupled and Curried functions
(Gabriel Scherer, review by Leo White and Alain Frisch)
- #8526: Add compile-time option -function-sections in ocamlopt to emit
each function in a separate named text section on supported targets.
(Greta Yorsh, review by Pierre Chambart)
- #2321: Eliminate dead ICatch handlers
(Greta Yorsh, review by Pierre Chambart and Vincent Laviron)
### Runtime system:
- #8619: Ensure Gc.minor_words remains accurate after a GC.
(Stephen Dolan, Xavier Leroy and David Allsopp,
review by Xavier Leroy and Gabriel Scherer)
* #8711: The major GC hooks are no longer allowed to interact with the
OCaml heap.
(Jacques-Henri Jourdan, review by Damien Doligez)
- #8691, #8897: Allocation functions are now guaranteed not to trigger any
OCaml callback when called from C.
(Jacques-Henri Jourdan, review by Stephen Dolan and Gabriel Scherer)
- #8630: Use abort() instead of exit(2) in caml_fatal_error, and add
the new hook caml_fatal_error_hook.
(Jacques-Henri Jourdan, review by Xavier Leroy)
- #8713: Introduce a state table in the runtime to contain the global variables
which must be duplicated for each domain in the multicore runtime.
(KC Sivaramakrishnan and Stephen Dolan, compatibility header hacking by
David Allsopp, review by David Allsopp, Alain Frisch, Nicolas Ojeda Bar,
Gabriel Scherer and Damien Doligez)
### Tools:
* #6792, #8654 ocamldebug now supports program using Dynlink. This
breaks compatibility with emacs modes.
(Whitequark and Jacques-Henri Jourdan, review by Gabriel Scherer
and Xavier Clerc)
### Standard library:
- #8657: Optimization in [Array.make] when initializing with unboxed
or young values.
(Jacques-Henri Jourdan, review by Gabriel Scherer and Stephen Dolan)
- #8634: Statistical memory profiling provided by the Gc.Memprof
module.
Incomplete version: does not sample objects allocated in the minor
heap in native mode
(Jacques-Henri Jourdan, review by Stephen Dolan, Gabriel Scherer and
Damien Doligez)
- #7672, #1492: Add `Filename.quote_command` to produce properly-quoted
commands for execution by Sys.command.
(Xavier Leroy, review by David Allsopp and Damien Doligez)
- #8716: Optimize [Array.fill] and [Hashtbl.clear] with a new runtime primitive
(Alain Frisch, review by David Allsopp, Stephen Dolan and Damien Doligez)
- #8530: List.sort: avoid duplicate work by chop
(Guillaume Munch-Maccagnoni, review by David Allsopp, Damien Doligez and
Gabriel Scherer)
### Other libraries:
- #1939, #2023: Implement Unix.truncate and Unix.ftruncate on Windows.
(Florent Monnier and Nicolás Ojeda Bär, review by David Allsopp)
### Compiler user-interface and warnings:
- #8833: Hint for (type) redefinitions in toplevel session
(Florian Angeletti, review by Gabriel Scherer)
- #2127: Refactor lookup functions
Included observable changes:
- makes the location of usage warnings and alerts for constructors more
precise
- don't warn about a constructor never being used to build values when it
has been defined as private
(Leo White, review by Thomas Refis)
- #8885: Warn about unused local modules
(Thomas Refis, review by Alain Frisch)
### Build system:
- #8650: ensure that "make" variables are defined before use;
revise generation of config/util.ml to better quote special characters
(Xavier Leroy, review by David Allsopp)
- #8690, #8696: avoid rebuilding the world when files containing primitives
change.
(Stephen Dolan, review by Gabriel Scherer, Sébastien Hinderer and
Thomas Refis)
- #8837: build manpages using ocamldoc.opt when available
cuts the manpages build time from 14s to 4s
(Gabriel Scherer, review by David Allsopp and Sébastien Hinderer,
report by David Allsopp)
- #8843, #8841: fix use of off_t on 32-bit systems.
(Stephen Dolan, report by Richard Jones, review by Xavier Leroy)
### Compiler user-interface and warnings:
- #8702, #8777: improved error messages for fixed row polymorphic variants
(Florian Angeletti, report by Leo White, review by Thomas Refis)
- #8874: add tests for typechecking error messages and pack them into
pretty-printing boxes.
(Oxana Kostikova, review by Gabriel Scherer)
- #8914: clarify the warning on unboxable types used in external primitives (61)
(Gabriel Scherer, review by Florian Angeletti, report on the Discourse forum)
### Bug fixes:
- #8622: Don't generate #! headers over 127 characters.
(David Allsopp, review by Xavier Leroy and Stephen Dolan)
- #8715: minor bugfixes in CamlinternalFormat; removes the unused
and misleading function CamlinternalFormat.string_of_formatting_gen
(Gabriel Scherer and Florian Angeletti,
review by Florian Angeletti and Gabriel Radanne)
- #8862, #8871: subst: preserve scopes
(Thomas Refis, report by Leo White)
- #8875: fix missing newlines in the output from MSVC invocation.
(Nicolás Ojeda Bär, review by Gabriel Scherer)
OCaml 4.09.0
------------
### Code generation and optimizations:
- #2278: Remove native code generation support for 32-bit Intel macOS,
iOS and other Darwin targets.
(Mark Shinwell, review by Nicolas Ojeda Bar and Xavier Leroy)
- #8507: Shorten symbol names of anonymous functions in Flambda mode
(the directory portions are now hidden)
(Mark Shinwell, review by Nicolás Ojeda Bär)
- #7931, #1904: Add FreeBSD/aarch64 support
(Greg V, review by Sébastien Hinderer, Stephen Dolan, Damien Doligez
and Xavier Leroy)
- #8547: Optimize matches that are an affine function of the input.
(Stefan Muenzel, review by Alain Frisch, Gabriel Scherer)
- #8681, #8699, #8712: Fix code generation with nested let rec of functions.
(Stephen Dolan, Leo White, Gabriel Scherer and Pierre Chambart,
review by Gabriel Scherer, reports by Alexey Solovyev and Jonathan French)
### Compiler user-interface and warnings:
* #2276: Remove support for compiler plugins and hooks (also adds
[Dynlink.unsafe_get_global_value])
(Mark Shinwell, Xavier Clerc, review by Nicolás Ojeda Bär,
Florian Angeletti, David Allsopp and Xavier Leroy)
- #2301: Hint on type error on int literal
(Jules Aguillon, review by Nicolás Ojeda Bär , Florian Angeletti,
Gabriel Scherer and Armaël Guéneau)
- #2307: Hint on type error on int's operators
(Jules Aguillon, with help from Armaël Guéneau,
review by Gabriel Scherer and Florian Angeletti)
- #2309: New options -with-runtime and -without-runtime in ocamlopt/ocamlc
that control the inclusion of the runtime system in the generated program.
(Lucas Pluvinage, review by Daniel Bünzli, Damien Doligez, David Allsopp
and Florian Angeletti)
- #2314: Remove support for gprof profiling.
(Mark Shinwell, review by Xavier Clerc and Stephen Dolan)
- #3819, #8546 more explanations and tests for illegal permutation
(Florian Angeletti, review by Gabriel Scherer)
- #8537: fix the -runtime-variant option for bytecode
(Damien Doligez, review by David Allsopp)
- #8541: Correctly print multi-lines locations
(Louis Roché, review by Gabriel Scherer)
- #8579: Better error message for private constructors
of an extensible variant type
(Guillaume Bury, review by many fine eyes)
### Compiler distribution build system:
- #2267: merge generation of header programs, also fixing parallel build on
Cygwin.
(David Allsopp, review by Sébastien Hinderer)
- #8514: Use boot/ocamlc.opt for building, if available.
(Stephen Dolan, review by Gabriel Scherer)
### Internal/compiler-libs changes:
- #1579: Add a separate types for clambda primitives
(Pierre Chambart, review by Vincent Laviron and Mark Shinwell)
- #1965: remove loop constructors in Cmm and Mach
(Vincent Laviron)
- #1973: fix compilation of catches with multiple handlers
(Vincent Laviron)
- #2190: fix pretty printing (using Pprintast) of "lazy ..." patterns and
"fun (type t) -> ..." expressions.
(Nicolás Ojeda Bär, review by Gabriel Scherer)
- #2228, #8545: refactoring the handling of .cmi files
by moving the logic from Env to a new module Persistent_env
(Gabriel Scherer, review by Jérémie Dimino and Thomas Refis)
- #2229: Env: remove prefix_idents cache
(Thomas Refis, review by Frédéric Bour and Gabriel Scherer)
- #2237, #8582: Reorder linearisation of Trywith to avoid a call instruction
(Vincent Laviron and Greta Yorsh, additional review by Mark Shinwell;
fix in #8582 by Mark Shinwell, Xavier Leroy and Anil Madhavapeddy)
- #2265: Add bytecomp/opcodes.mli
(Mark Shinwell, review by Nicolas Ojeda Bar)
- #2268: Improve packing mechanism used for building compilerlibs modules
into the Dynlink libraries
(Mark Shinwell, Stephen Dolan, review by David Allsopp)
- #2277: Use newtype names as type variable names
(Matthew Ryan)
- #2280: Don't make more Clambda constants after starting Cmmgen
(Mark Shinwell, review by Vincent Laviron)
- #2281: Move some middle-end files around
(Mark Shinwell, review by Pierre Chambart and Vincent Laviron)
- #2283: Add [is_prefix] and [find_and_chop_longest_common_prefix] to
[Misc.Stdlib.List]
(Mark Shinwell, review by Alain Frisch and Stephen Dolan)
- #2284: Add various utility functions to [Misc] and remove functions
from [Misc.Stdlib.Option] that are now in [Stdlib.Option]
(Mark Shinwell, review by Thomas Refis)
- #2286: Functorise [Consistbl]
(Mark Shinwell, review by Gabriel Radanne)
- #2291: Add [Compute_ranges] pass
(Mark Shinwell, review by Vincent Laviron)
- #2292: Add [Proc.frame_required] and [Proc.prologue_required].
Move tail recursion label creation to [Linearize]. Correctly position
[Lprologue] relative to [Iname_for_debugger] operations.
(Mark Shinwell, review by Vincent Laviron)
- #2308: More debugging information on [Cmm] terms
(Mark Shinwell, review by Stephen Dolan)
- #7878, #8542: Replaced TypedtreeIter with tast_iterator
(Isaac "Izzy" Avram, review by Gabriel Scherer and Nicolás Ojeda Bär)
- #8598: Replace "not is_nonexpansive" by "maybe_expansive".
(Thomas Refis, review by David Allsopp, Florian Angeletti, Gabriel Radanne,
Gabriel Scherer and Xavier Leroy)
### Runtime system:
- #1725, #2279: Deprecate Obj.set_tag and Obj.truncate
(Stephen Dolan, review by Gabriel Scherer, Damien Doligez and Xavier Leroy)
- #2075, #7729: rename _T macro used to support Unicode in the (Windows) runtime
in order to avoid compiler warning
(Nicolás Ojeda Bär, review by Gabriel Scherer and David Allsopp)
* #2240: Constify "identifier" in struct custom_operations
(Cedric Cellier, review by Xavier Leroy)
- #2250: Remove extra integer sign-extension in compare functions
(Stefan Muenzel, review by Xavier Leroy)
* #2293: Constify "caml_named_value"
(Stephen Dolan, review by Xavier Leroy)
- #8607: Remove obsolete macros for pre-2002 MSVC support
(Stephen Dolan, review by Nicolás Ojeda Bär and David Allsopp)
- #8656: Fix a bug in [caml_modify_generational_global_root]
(Jacques-Henri Jourdan, review by Gabriel Scherer)
- #8787, #8788: avoid integer overflow in caml_output_value_to_bytes
(Jeremy Yallop, report by Marcello Seri)
### Standard library:
- #2262: take precision (.<n>) and flags ('+' and ' ') into account
in printf %F
(Pierre Roux, review by Gabriel Scherer)
- #6148, #8596: optimize some buffer operations
(Damien Doligez, reports by John Whitington and Alain Frisch,
review by Jeremy Yallop and Gabriel Scherer)
### Other libraries:
- #2112: Fix Thread.yield unfairness with busy threads yielding to each
other.
(Andrew Hunter, review by Jacques-Henri Jourdan, Spiros Eliopoulos, Stephen
Weeks, & Mark Shinwell)
- #7903, #2306: Make Thread.delay interruptible by signals again
(Xavier Leroy, review by Jacques-Henri Jourdan and Edwin Török)
- #2248: Unix alloc_sockaddr: Fix read of uninitialized memory for an
unbound Unix socket. Add support for receiving abstract (Linux) socket paths.
(Tim Cuthbertson, review by Sébastien Hinderer and Jérémie Dimino)
- #2289: Delete the vmthreads library. This library was deprecated in 4.08.0.
(Jérémie Dimino)
- #2318: Delete the graphics library. This library is now available
as a separate "graphics" package in opam. Its new home is:
https://github.com/ocaml/graphics
(Jérémie Dimino, review by Nicolas Ojeda Bar, Xavier Leroy and
Sébastien Hinderer)
### Tools:
- #2221: ocamldep will now correctly allow a .ml file in an include directory
that appears first in the search order to shadow a .mli appearing in a later
include directory.
(Nicolás Ojeda Bär, review by Florian Angeletti)
### Manual and documentation:
- #8757: Rename Pervasives to Stdlib in core library documentation.
(Ian Zimmerman, review by David Allsopp)
- #7584, #8538: Document .cmt* files in the "overview" of ocaml{c,opt}
(Oxana Kostikova, rewiew by Florian Angeletti)
- #8515: manual, precise constraints on reexported types
(Florian Angeletti, review by Gabriel Scherer)
### Bug fixes:
- #7156, #8594: make top level use custom printers if they are available
(Andrew Litteken, report by Martin Jambon, review by Nicolás Ojeda Bär,
Thomas Refis, Armaël Guéneau, Gabriel Scherer, David Allsopp)
- #3249: ocamlmklib should reject .cmxa files
(Xavier Leroy)
- #7937, #2287: fix uncaught Unify exception when looking for type
declaration
(Florian Angeletti, review by Jacques Garrigue)
- #2296: Fix parsing of hexadecimal floats with underscores in the exponent.
(Hugo Heuzard and Xavier Leroy, review by Gabriel Scherer)
- #8610, #8613: toplevel printing, consistent deduplicated name for types
(Florian Angeletti, review by Thomas Refis and Gabriel Scherer,
reported by Xavier Clerc)
- #8635, #8636: Fix a bad side-effect of the -allow-approx option of
ocamldep. It used to turn some errors into successes
(Jérémie Dimino)
- #8701, #8725: Variance of constrained parameters causes principality issues
(Jacques Garrigue, report by Leo White, review by Gabriel Scherer)
- #8779, more cautious variance computation to avoid missing cmis
(Florian Angeletti, report by Antonio Nuno Monteiro, review by Leo White)
- #8800: Fix soundness bug in extension constructor inclusion
(Leo White, review by Jacques Garrigue)
- #8810: Env.lookup_module: don't allow creating loops
(Thomas Refis, report by Leo White, review by Jacques Garrigue)
- #8848: Fix x86 stack probe CFI information in caml_c_call and
caml_call_gc
(Tom Kelly, review by Xavier Leroy)
- #8864, #8865: Fix native compilation of left shift by (word_size - 1)
(Vincent Laviron, report by Murilo Giacometti Rocha, review by Xavier Leroy)
OCaml 4.08 maintenance branch:
------------------------------
### Bug fixes:
- #7887: ensure frame table is 8-aligned on ARM64 and PPC64
(Xavier Leroy, report by Mark Hayden, review by Mark Shinwell
and Gabriel Scherer)
- #8751: fix bug that could result in misaligned data section when compiling to
native-code on amd64. (observed with the mingw64 compiler)
(Nicolás Ojeda Bär, review by David Allsopp)
- #8769, #8770: Fix assertion failure with -pack
(Leo White, review by Gabriel Scherer, report by Fabian @copy)
- #8816, #8818: fix loading of packed modules with Dynlink (regression in
#2176).
(Leo White, report by Andre Maroneze, review by Gabriel Scherer)
- #8830: configure script: fix tool prefix detection and Debian's armhf
detection
(Stéphane Glondu, review by David Allsopp)
OCaml 4.08.0 (13 June 2019)
---------------------------
### Language features:
- #1947: Introduce binding operators (let*, let+, and* etc.)
(Leo White, review by Thomas Refis)
- #1892: Allow shadowing of items coming from an include
(Thomas Refis, review by Gabriel Radanne)
- #2122: Introduce local substitutions in signatures: "type t := type_expr"
and "module M := Extended(Module).Path"
(Thomas Refis, with help and review from Leo White, and Alain Frisch)
- #1804: New notion of "alerts" that generalizes the deprecated warning
[@@ocaml.alert deprecated "Please use bar instead!"]
[@@ocaml.alert unsafe "Please use safe_foo instead!"]
(Alain Frisch, review by Leo White and Damien Doligez)
- #6422, #7083, #305, #1568: Allow `exception` under or-patterns
(Thomas Refis, with help and review from Alain Frisch, Gabriel Scherer, Jeremy
Yallop, Leo White and Luc Maranget)
- #1705: Allow @@attributes on exception declarations.
(Hugo Heuzard, review by Gabriel Radanne and Thomas Refis)
- #1506, #2147, #2166, #2167: Extended `open` to arbitrary module
expression in structures and to applicative paths in signatures
(Runhang Li, review by Alain Frisch, Florian Angeletti, Jeremy Yallop,
Leo White and Thomas Refis)
* #2106: .~ is now a reserved keyword, and is no longer available
for use in extended indexing operators
(Jeremy Yallop, review by Gabriel Scherer, Florian Angeletti, and
Damien Doligez)
* #7841, #2041, #2235: allow modules from include directories
to shadow other ones, even in the toplevel; for a example, including
a directory that defines its own Result module will shadow the stdlib's.
(Jérémie Dimino, review by Alain Frisch and David Allsopp)
### Type system:
- #2110: Partial support for GADTs inside or-patterns;
The type equalities introduced by the GADT constructor are only
available inside the or-pattern; they cannot be used in the
right-hand-side of the clause, when both sides of the or-pattern
agree on it.
(Thomas Refis and Leo White, review by Jacques Garrigue)
- #1826: allow expanding a type to a private abbreviation instead of
abstracting when removing references to an identifier.
(Thomas Refis and Leo White, review by Jacques Garrigue)
- #1942, #2244: simplification of the static check
for recursive definitions
(Alban Reynaud and Gabriel Scherer,
review by Jeremy Yallop, Armaël Guéneau and Damien Doligez)
### Standard library:
- #2128: Add Fun module: `id, const, flip, negate, protect`
(protect is a "try_finally" combinator)
https://caml.inria.fr/pub/docs/manual-ocaml/libref/Fun.html
(Many fine eyes)
- #2010: Add Bool module
https://caml.inria.fr/pub/docs/manual-ocaml/libref/Bool.html
(Many fine eyes)
- #2011: Add Int module
https://caml.inria.fr/pub/docs/manual-ocaml/libref/Int.html
(Many fine eyes)
- #1940: Add Option module and Format.pp_print_option
`none, some, value, get, bind, join, map, fold, iter`, etc.
https://caml.inria.fr/pub/docs/manual-ocaml/libref/Option.html
(Many fine eyes)
- #1956: Add Result module and Format.pp_print_result
`ok, error, value, get_ok, bind, join, map, map_error`, etc.
https://caml.inria.fr/pub/docs/manual-ocaml/libref/Result.html
(Many fine eyes)
- #1855, #2118: Add `Fun.protect ~finally` for enforcing local
invariants whether a function raises or not, similar to
`unwind-protect` in Lisp and `FINALLY` in Modula-2. It is careful
about preserving backtraces and treating exceptions in finally as
errors.
(Marcello Seri and Guillaume Munch-Maccagnoni, review by Daniel
Bünzli, Gabriel Scherer, François Bobot, Nicolás Ojeda Bär, Xavier
Clerc, Boris Yakobowski, Damien Doligez, and Xavier Leroy)
* #1605: Deprecate Stdlib.Pervasives. Following #1010, Pervasives
is no longer needed and Stdlib should be used instead.
(Jérémie Dimino, review by Nicolás Ojeda Bär)
- #2185: Add `List.filter_map`
(Thomas Refis, review by Alain Frisch and Gabriel Scherer)
- #1957: Add Stack.{top_opt,pop_opt} and Queue.{peek_opt,take_opt}.
(Vladimir Keleshev, review by Nicolás Ojeda Bär and Gabriel Scherer)
- #1182: Add new Printf formats %#d %#Ld %#ld %#nd (idem for %i and %u) for
alternative integer formatting -- inserts '_' between blocks of digits.
(ygrek, review by Gabriel Scherer)
- #1959: Add Format.dprintf, a printing function which outputs a closure
usable with %t.
(Gabriel Radanne, request by Armaël Guéneau,
review by Florian Angeletti and Gabriel Scherer)
- #1986, #6450: Add Set.disjoint
(Nicolás Ojeda Bär, review by Gabriel Scherer)
- #7812, #2125: Add Filename.chop_suffix_opt
(Alain Frisch, review by Nicolás Ojeda Bär, suggestion by whitequark)
- #1864: Extend Bytes and Buffer with functions to read/write
binary representations of numbers
(Alain Frisch and Daniel Bünzli)
- #1458: Add unsigned operations unsigned_div, unsigned_rem, unsigned_compare
and unsigned_to_int to modules Int32, Int64, Nativeint.
(Nicolás Ojeda Bär, review by Daniel Bünzli, Alain Frisch and Max Mouratov)
- #2002: Add Format.pp_print_custom_break, a new more general kind of break
hint that can emit non-whitespace characters.
(Vladimir Keleshev and Pierre Weis, review by Josh Berdine, Gabriel Radanne)
- #1966: Add Format semantic tags using extensible sum types.
(Gabriel Radanne, review by Nicolás Ojeda Bär)
- #1794: Add constants zero, one, minus_one and functions succ,
pred, is_finite, is_infinite, is_nan, is_integer, trunc, round,
next_after, sign_bit, min, max, min_max, min_num, max_num,
min_max_num to module Float.
(Christophe Troestler, review by Alain Frish, Xavier Clerc and Daniel Bünzli)
- #1354, #2177: Add fma support to Float module.
(Laurent Thévenoux, review by Alain Frisch, Jacques-Henri Jourdan,
Xavier Leroy)
- #5072, #6655, #1876: add aliases in Stdlib for built-in types
and exceptions.
(Jeremy Yallop, reports by Pierre Letouzey and David Sheets,
review by Valentin Gatien-Baron, Gabriel Scherer and Alain Frisch)
- #1731: Format, use raise_notrace to preserve backtraces.
(Frédéric Bour, report by Jules Villard, review by Gabriel Scherer)
- #6701, #1185, #1803: make float_of_string and string_of_float
locale-independent.
(ygrek, review by Xavier Leroy and Damien Doligez)
- #7795, #1782: Fix off-by-one error in Weak.create.
(KC Sivaramakrishnan, review by Gabriel Scherer and François Bobot)
- #7235: Format, flush err_formatter at exit.
(Pierre Weis, request by Jun Furuse)
- #1857, #7812: Remove Sort module, deprecated since 2000 and emitting
a deprecation warning since 4.02.
(whitequark)
- #1923: Arg module sometimes misbehaved instead of rejecting invalid
-keyword=arg inputs
(Valentin Gatien-Baron, review by Gabriel Scherer)
- #1959: Small simplification and optimization to Format.ifprintf
(Gabriel Radanne, review by Gabriel Scherer)
- #2119: clarify the documentation of Set.diff
(Gabriel Scherer, suggestion by John Skaller)
- #2145: Deprecate the mutability of Gc.control record fields
(Damien Doligez, review by Alain Frisch)
- #2159, #7874: annotate {String,Bytes}.equal as being [@@noalloc].
(Pierre-Marie Pédrot, review by Nicolás Ojeda Bär)
- #1936: Add module Float.Array
(Damien Doligez, review by Xavier Clerc and Alain Frisch)
- #2183: Fix segfault in Array.create_float with -no-flat-float-array
(Damien Doligez, review by Gabriel Scherer and Jeremy Yallop)
- #1525: Make function set_max_indent respect documentation
(Pierre Weis, Richard Bonichon, review by Florian Angeletti)
- #2202: Correct Hashtbl.MakeSeeded.{add_seq,replace_seq,of_seq} to use
functor hash function instead of default hash function. Hashtbl.Make.of_seq
shouldn't create randomized hash tables.
(David Allsopp, review by Alain Frisch)
### Other libraries:
- #2533, #1839, #1949: added Unix.fsync
(Francois Berenger, Nicolás Ojeda Bär, review by Daniel Bünzli, David Allsopp
and ygrek)
- #1792, #7794: Add Unix.open_process_args{,_in,_out,_full} similar to
Unix.open_process{,_in,_out,_full}, but passing an explicit argv array.
(Nicolás Ojeda Bär, review by Jérémie Dimino, request by Volker Diels-Grabsch)
- #1999: Add Unix.process{,_in,_out,_full}_pid to retrieve opened process's
pid.
(Romain Beauxis, review by Nicolás Ojeda Bär)
- #2222: Set default status in waitpid when pid is zero. Otherwise,
status value is undefined.
(Romain Beauxis and Xavier Leroy, review by Stephen Dolan)
* #2104, #2211, #4127, #7709: Fix Thread.sigmask. When
system threads are loaded, Unix.sigprocmask is now an alias for
Thread.sigmask. This changes the behavior at least on MacOS, where
Unix.sigprocmask used to change the masks of all threads.
(Jacques-Henri Jourdan, review by Jérémie Dimino)
- #1061: Add ?follow parameter to Unix.link. This allows hardlinking
symlinks.
(Christopher Zimmermann, review by Xavier Leroy, Damien Doligez, David
Allsopp, David Sheets)
- #2038: Deprecate vm threads.
OCaml supported both "native threads", based on pthreads,
and its own green-threads implementation, "vm threads". We are not
aware of any recent usage of "vm threads", and removing them simplifies
further maintenance.
(Jérémie Dimino)
* #4208, #4229, #4839, #6462, #6957, #6950, #1063, #2176,
#2297: Make (nat)dynlink sound by correctly failing when
dynlinked module names clash with other modules or interfaces.
(Mark Shinwell, Leo White, Nicolás Ojeda Bär, Pierre Chambart)
- #2263: Delete the deprecated Bigarray.*.map_file functions in
favour of `*_of_genarray (Unix.map_file ...)` functions instead. The
`Unix.map_file` function was introduced in OCaml 4.06.0 onwards.
(Jérémie Dimino, reviewed by David Allsopp and Anil Madhavapeddy)
### Compiler user-interface and warnings:
- #2096: Add source highlighting for errors & warnings in batch mode
(Armaël Guéneau, review by Gabriel Scherer and Jérémie Dimino)
- #2133: [@ocaml.warn_on_literal_pattern]: now warn on literal patterns
found anywhere in a constructor's arguments.
(Jeremy Yallop, review by Gabriel Scherer)
- #1720: Improve error reporting for missing 'rec' in let-bindings.
(Arthur Charguéraud and Armaël Guéneau, with help and advice
from Gabriel Scherer, Frédéric Bour, Xavier Clerc and Leo White)
- #7116, #1430: new -config-var option
to get the value of a single configuration variable in scripts.
(Gabriel Scherer, review by Sébastien Hinderer and David Allsopp,
request by Adrien Nader)
- #1733,1993,1998,2058,2094,2140: Typing error message improvements
- #1733, change the perspective of the unexpected existential error
message.
- #1993, expanded error messages for universal quantification failure
- #1998, more context for unbound type parameter error
- #2058, full explanation for unsafe cycles in recursive module
definitions (suggestion by Ivan Gotovchits)
- #2094, rewording for "constructor has no type" error
- #7565, #2140, more context for universal variable escape
in method type
(Florian Angeletti, reviews by Jacques Garrique, Armaël Guéneau,
Gabriel Radanne, Gabriel Scherer and Jeremy Yallop)
- #1913: new flag -dump-into-file to print debug output like -dlambda into
a file named after the file being built, instead of on stderr.
(Valentin Gatien-Baron, review by Thomas Refis)
- #1921: in the compilation context passed to ppx extensions,
add more configuration options related to type-checking:
-rectypes, -principal, -alias-deps, -unboxed-types, -unsafe-string
(Gabriel Scherer, review by Gabriel Radanne, Xavier Clerc and Frédéric Bour)
- #1976: Better error messages for extension constructor type mismatches
(Thomas Refis, review by Gabriel Scherer)
- #1841, #7808: the environment variable OCAMLTOP_INCLUDE_PATH can now
specify a list of additional include directories for the ocaml toplevel.
(Nicolás Ojeda Bär, request by Daniel Bünzli, review by Daniel Bünzli and
Damien Doligez)
- #6638, #1110: introduced a dedicated warning to report
unused "open!" statements
(Alain Frisch, report by dwang, review by and design from Leo White)
- #1974: Trigger warning 5 in "let _ = e" and "ignore e" if e is of function
type and syntactically an application. (For the case of "ignore e" the warning
already existed, but used to be triggered even when e was not an application.)
(Nicolás Ojeda Bär, review by Alain Frisch and Jacques Garrigue)
- #7408, #7846, #2015: Check arity of primitives.
(Hugo Heuzard, review by Nicolás Ojeda Bär)
- #2091: Add a warning triggered by type declarations "type t = ()"
(Armaël Guéneau, report by linse, review by Florian Angeletti and Gabriel
Scherer)
- #2004: Use common standard library path `lib/ocaml` for Windows,
for consistency with OSX & Linux. Previously was located at `lib`.
(Bryan Phelps, Jordan Walke, review by David Allsopp)
- #6416, #1120: unique printed names for identifiers
(Florian Angeletti, review by Jacques Garrigue)
- #1691: add shared_libraries to ocamlc -config exporting
SUPPORTS_SHARED_LIBRARIES from Makefile.config.
(David Allsopp, review by Gabriel Scherer and Mark Shinwell)
- #6913, #1786: new -match-context-rows option
to control the degree of optimization in the pattern matching compiler.
(Dwight Guth, review by Gabriel Scherer and Luc Maranget)
- #1822: keep attributes attached to pattern variables from being discarded.
(Nicolás Ojeda Bär, review by Thomas Refis)
- #1845: new `-dcamlprimc` option to keep the generated C file containing
the information about primitives; pass `-fdebug-prefix-map` to the C compiler
when supported, for reproducible builds
(Xavier Clerc, review by Jérémie Dimino)
- #1856, #1869: use `BUILD_PATH_PREFIX_MAP` when compiling primitives
in order to make builds reproducible if code contains uses of
`__FILE__` or `__LOC__`
(Xavier Clerc, review by Gabriel Scherer and Sébastien Hinderer)
- #1906: the -unsafe option does not apply to marshalled ASTs passed
to the compiler directly or by a -pp preprocessor; add a proper
warning (64) instead of a simple stderr message
(Valentin Gatien-Baron)
- #1925: Print error locations more consistently between batch mode, toplevel
and expect tests
(Armaël Guéneau, review by Thomas Refis, Gabriel Scherer and François Bobot)
- #1930: pass the elements from `BUILD_PATH_PREFIX_MAP` to the assembler
(Xavier Clerc, review by Gabriel Scherer, Sébastien Hinderer, and
Xavier Leroy)
- #1945, #2032: new "-stop-after [parsing|typing]" option
to stop compilation after the parsing or typing pass
(Gabriel Scherer, review by Jérémie Dimino)
- #1953: Add locations to attributes in the parsetree.
(Hugo Heuzard, review by Gabriel Radanne)
- #1954: Add locations to toplevel directives.
(Hugo Heuzard, review by Gabriel Radanne)
* #1979: Remove support for TERM=norepeat when displaying errors
(Armaël Guéneau, review by Gabriel Scherer and Florian Angeletti)
- #1960: The parser keeps previous location when relocating ast node.
(Hugo Heuzard, review by Jérémie Dimino)
- #7864, #2109: remove duplicates from spelling suggestions.
(Nicolás Ojeda Bär, review by Armaël Guéneau)
### Manual and documentation:
- #7548: printf example in the tutorial part of the manual
(Kostikova Oxana, rewiew by Gabriel Scherer, Florian Angeletti,
Marcello Seri and Armaël Guéneau)
- #7546, #2020: preambles and introduction for compiler-libs.
(Florian Angeletti, review by Daniel Bünzli, Perry E. Metzger
and Gabriel Scherer)
- #7547, #2273: Tutorial on Lazy expressions and patterns in OCaml Manual
(Ulugbek Abdullaev, review by Florian Angeletti and Gabriel Scherer)
- #7720, #1596, precise the documentation
of the maximum indentation limit in Format.
(Florian Angeletti, review by Richard Bonichon and Pierre Weis)
- #7825: html manual split compilerlibs from stdlib in the html
index of modules
(Florian Angeletti, review by Perry E. Metzger and Gabriel Scherer)
- #1209, #2008: in the Extension section, use the caml_example environment
(uses the compiler to check the example code).
This change was made possible by a lot of tooling work from Florian Angeletti:
#1702, #1765, #1863, and Gabriel Scherer's #1903.
(Gabriel Scherer, review by Florian Angeletti)
- #1788, 1831, 2007, 2198, 2232, move language extensions to the core
chapters:
- #1788: quoted string description
- #1831: local exceptions and exception cases
- #2007: 32-bit, 64-bit and native integer literals
- #2198: lazy patterns
- #2232: short object copy notation
(Florian Angeletti, review by Xavier Clerc, Perry E. Metzger, Gabriel Scherer
and Jeremy Yallop)
- #1863: caml-tex2, move to compiler-libs
(Florian Angeletti, review by Sébastien Hinderer and Gabriel Scherer)
- #2105: Change verbatim to caml_example in documentation
(Maxime Flin, review by Florian Angeletti)
- #2114: ocamldoc, improved manpages for documentation inside modules
(Florian Angeletti, review by Gabriel Scherer)
- #2117: stdlib documentation, duplicate the operator precedence table
from the manual inside a separate "OCaml_operators" module.
(Florian Angeletti, review by Daniel Bünzli, Perry E. Metzger
and Gabriel Scherer)
- #2187: document "exception A | pat" patterns
(Florian Angeletti, review by Perry E. Metzger and Jeremy Yallop)
- #8508: refresh \moduleref macro
(Florian Angeletti, review by Gabriel Scherer)
### Code generation and optimizations:
- #7725, #1754: improve AFL instrumentation for objects and lazy values.
(Stephen Dolan)
- #1631: AMD64 code generator: emit shorter instruction sequences for the
sign-extension operations.
(LemonBoy, review by Alain Frisch and Xavier Leroy)
- #7246, #2146: make a few int64 primitives use [@@unboxed]
stubs on 32bits
(Jérémie Dimino)
- #1917: comballoc: ensure object allocation order is preserved
(Stephen Dolan)
- #6242, #2143, #8558, #8559: Optimize some local functions.
Local functions that do not escape and whose calls all have
the same continuation are lowered into a static-catch handler.
(Alain Frisch, review by Gabriel Scherer)
- #2082: New options [-insn-sched] and [-no-insn-sched] to control
instruction scheduling.
(Mark Shinwell, review by Damien Doligez)
- #2239: Fix match miscompilation with flambda
(Leo White, review by Alain Frisch)
### Runtime system:
- #7198, #7750, #1738: add a function (caml_alloc_custom_mem)
and three GC parameters to give the user better control of the
out-of-heap memory retained by custom values; use the function to
allocate bigarrays and I/O channels.
(Damien Doligez, review by Alain Frisch)
- #1793: add the -m and -M command-line options to ocamlrun.
Option -m prints the magic number of the bytecode executable passed
as argument, -M prints the magic number expected by ocamlrun.
(Sébastien Hinderer, review by Xavier Clerc and Damien Doligez)
- #1867: Remove the C plugins mechanism.
(Xavier Leroy, review by David Allsopp, Damien Doligez, Sébastien Hinderer)
- #8627: Require SSE2 for 32-bit mingw port to generate correct code
for caml_round with GCC 7.4.
(David Allsopp, review by Xavier Leroy)
- #7676, #2144: Remove old GC heuristic
(Damien Doligez, report and review by Alain Frisch)
- #1723: Remove internal Meta.static_{alloc,free} primitives.
(Stephen Dolan, review by Gabriel Scherer)
- #1895: Printexc.get_callstack would return only one frame in native
code in threads other then the initial one
(Valentin Gatien-Baron, review by Xavier Leroy)
- #1900, #7814: avoid exporting non-prefixed identifiers in the debug
and instrumented runtimes.
(Damien Doligez, report by Gabriel Scherer)
- #2079: Avoid page table lookup in Pervasives.compare with
no-naked-pointers
(Sam Goldman, review by Gabriel Scherer, David Allsopp, Stephen Dolan)
- #7829, #8585: Fix pointer comparisons in freelist.c (for 32-bit platforms)
(David Allsopp and Damien Doligez)
- #8567, #8569: on ARM64, use 32-bit loads to access caml_backtrace_active
(Xavier Leroy, review by Mark Shinwell and Greta Yorsh)
- #8568: Fix a memory leak in mmapped bigarrays
(Damien Doligez, review by Xavier Leroy and Jérémie Dimino)
### Tools
- #2182: Split Emacs caml-mode as an independent project.
(Christophe Troestler, review by Gabriel Scherer)
- #1865: support dark themes in Emacs, and clean up usage of
deprecated Emacs APIs
(Wilfred Hughes, review by Clément Pit-Claudel)
- #1590: ocamllex-generated lexers can be instructed not to update
their lex_curr_p/lex_start_p fields, resulting in a significant
performance gain when those fields are not required.
(Alain Frisch, review by Jérémie Dimino)
- #7843, #2013: ocamldoc, better handling of {{!label}text} in the latex
backend.
(Florian Angeletti, review by Nicolás Ojeda Bär and Gabriel Scherer)