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Next version:
-------------
Ocaml 4.02.0:
-------------
(Changes that can break existing programs are marked with a "*")
Language features:
- Attributes and extension nodes
(Alain Frisch)
- PR#5095: Generative functors
(Jacques Garrigue)
- Module aliases
(Jacques Garrigue)
* Alternative syntax for string literals {id|...|id} (can break comments)
(Alain Frisch)
- Separation between read-only strings (type string) and read-write byte
sequences (type bytes). Activated by command-line option -safe-string.
(Damien Doligez)
- PR#6318: Exception cases in pattern matching
(Jeremy Yallop, backend by Alain Frisch)
- PR#5584: Extensible open datatypes
(Leo White)
Build system for the OCaml distribution:
- Use -bin-annot when building.
- Use GNU make instead of portable makefiles.
Shedding weight:
* Removed Camlp4 from the distribution, now available as third-party software.
* Removed Labltk from the distribution, now available as a third-party library.
Type system:
* PR#6235: Keep typing of pattern cases independent in principal mode
(i.e. information from previous cases is no longer used when typing
patterns; cf. 'PR#6235' in testsuite/test/typing-warnings/records.ml)
(Jacques Garrigue)
- Allow opening a first-class module or applying a generative functor
in the body of a generative functor. Allow it also in the body of
an applicative functor if no types are created
(Jacques Garrigue, suggestion by Leo White)
* Module aliases are now typed in a specific way, which remembers their
identity. In particular this changes the signature inferred by
"module type of"
(Jacques Garrigue)
- PR#6331: Slight change in the criterion to distinguish private
abbreviations and private row types: create a private abbreviation for
closed objects and fixed polymorphic variants.
(Jacques Garrigue)
* PR#6333: Compare first class module types structurally rather than
nominally. Value subtyping allows module subtyping as long as the internal
representation is unchanged.
(Jacques Garrigue)
Compilers:
- More aggressive constant propagation, including float and
int32/int64/nativeint arithmetic. Constant propagation for floats
can be turned off with option -no-float-const-prop, for codes that
change FP rounding modes at run-time.
(Xavier Leroy)
- New back-end optimization pass: common subexpression elimination (CSE).
(Reuses results of previous computations instead of recomputing them.)
(Xavier Leroy)
- New back-end optimization pass: dead code elimination.
(Removes arithmetic and load instructions whose results are unused.)
(Xavier Leroy)
- PR#6269: Optimization of sequences of string patterns
(Benoît Vaugon and Luc Maranget)
- Experimental native code generator for AArch64 (ARM 64 bits)
(Xavier Leroy)
- PR#6042: Optimization of integer division and modulus by constant divisors
(Xavier Leroy and Phil Denys)
- Add "-open" command line flag for opening a single module before typing
* "-o" now sets module name to the output file name up to the first "."
(it also applies when "-o" is not given, i.e. the module name is then
the input file name up to the first ".")
(Leo White and Mark Shinwell)
* PR#5779: better sharing of structured constants
(Alain Frisch)
- PR#6182: better message for virtual objects and class types
(Leo P. White, Stephen Dolan)
- PR#5817: new flag to keep locations in cmi files
(Alain Frisch)
- PR#5854: issue warning 3 when referring to a value marked with
the [@@ocaml.deprecated] attribute
(Alain Frisch, suggestion by Pierre-Marie Pédrot)
* PR#6203: Constant exception constructors no longer allocate
(Alain Frisch)
- PR#6311: Improve signature mismatch error messages
(Alain Frisch, suggestion by Daniel Bünzli)
- PR#6345: Better compilation of optional arguments with default values
(Alain Frisch, review by Jacques Garrigue)
- PR#6260: Unnecessary boxing in let
(Vladimir Brankov)
- PR#6017: a new format implementation based on GADTs
(Benoît Vaugon and Gabriel Scherer)
Toplevel interactive system:
- PR#5377: New "#show_*" directives
(ygrek, Jacques Garrigue and Alain Frisch)
Runtime system:
- New configure option "-no-naked-pointers" to improve performance by
avoiding page table tests during block darkening and the marking phase
of the major GC. In this mode, all out-of-heap pointers must point at
things that look like OCaml values: in particular they must have a valid
header. The colour of said headers should be black.
(Mark Shinwell, reviews by Damien Doligez and Xavier Leroy)
- Fixed bug in native code version of [caml_raise_with_string] that could
potentially lead to heap corruption.
(Mark Shinwell)
- Blocks initialized by [CAMLlocal*] and [caml_alloc] are now filled with
[Val_unit] rather than zero.
(Mark Shinwell)
- Fixed a major performance problem on large heaps (~1GB) by making heap
increments proportional to heap size by default
(Damien Doligez)
- PR#4765: Structural equality should treat exception specifically
(Alain Frisch)
- PR#5009: efficient comparison/indexing of exceptions
(Alain Frisch, request by Markus Mottl)
- PR#6075: avoid using unsafe C library functions (strcpy, strcat, sprintf)
(Xavier Leroy, reports from user 'jfc' and Anil Madhavapeddy)
- An ISO C99-compliant C compiler and standard library is now assumed.
(Plus special exceptions for MSVC.) In particular, emulation code for
64-bit integer arithmetic was removed, the C compiler must support a
64-bit integer type.
(Xavier Leroy)
Standard library:
* Add new modules: Bytes and BytesLabels.
(Damien Doligez)
- PR#4986: add List.sort_uniq and Set.of_list
(Alain Frisch)
- PR#5935: a faster version of "raise" which does not maintain the backtrace
(Alain Frisch)
- PR#6146: support "Unix.kill pid Sys.sigkill" under Windows
(Romain Bardou and Alain Frisch)
- PR#6148: speed improvement for Buffer
(John Whitington)
- PR#6180: efficient creation of uninitialized float arrays
(Alain Frisch, request by Markus Mottl)
OCamldoc:
- PR#6257: handle full doc comments for variant constructors and
record fields
(Maxence Guesdon, request by ygrek)
- PR#6310: fix ocamldoc's subscript/superscript CSS font size
(Anil Madhavapeddy)
- PR#6425: fix generation of man pages
(Maxence Guesdon, report by Anil Madhavapeddy)
Bug fixes:
- PR#2719: wrong scheduling of bound checks within a
try...with Invalid_argument -> _ ... (Xavier Leroy)
- PR#4719: Sys.executable_name wrong if executable name contains dots (Windows)
(Alain Frisch, report by Bart Jacobs)
- PR#4855: 'camlp4 -I +dir' accepted, dir is relative to 'camlp4 -where'
(Jun Furuse and Hongbo Zhang, report by Dmitry Grebeniuk)
- PR#5201: ocamlbuild: add --norc to the bash invocation to help performances
(user 'daweil')
- PR#5598: follow-up fix related to PR#6165
(Damien Doligez)
- PR#5820: Fix camlp4 lexer roll back problem
(Hongbo Zhang)
- PR#6038: on x86-32, enforce 16-byte stack alignment for compatibility
with recent GCC and Clang. Win32/MSVC keeps 4-byte stack alignment.
(Xavier Leroy)
- PR#6062: Fix a regression bug caused by commit 13047
(Hongbo Zhang, report by Christophe Troestler)
- PR#6109: Typos in ocamlbuild error messages
(Gabriel Kerneis)
- PR#6116: more efficient implementation of Digest.to_hex
(ygrek)
- PR#6165: Alterations to handling of \013 in source files breaking other tools
(David Allsopp)
- PR#6173: Typing error message is worse than before
(Jacques Garrigue and John Whitington)
- PR#6174: OCaml compiler loops on an example using GADTs (-rectypes case)
(Jacques Garrigue and Grégoire Henry, report by Chantal Keller)
- PR#6175: add open! support to camlp4
(Hongbo Zhang)
- PR#6183: enhanced documentation for 'Unix.shutdown_connection'
(Anil Madhavapeddy, report by Jun Furuse)
- PR#6184: ocamlbuild: `ocamlfind ocamldep` does not support -predicate
(Jacques-Pascal Deplaix)
- PR#6194: Incorrect unused warning with first-class modules in patterns
(Jacques Garrigue, report by Markus Mottl and Leo White)
- PR#6211: in toplevel interactive use, bad interaction between uncaught
exceptions and multiple bindings of the form "let x = a let y = b;;".
(Xavier Leroy)
- PR#6216: inlining of GADT matches generates invalid assembly
(Xavier Leroy and Alain Frisch, report by Mark Shinwell)
- PR#6233: out-of-bounds exceptions lose their locations on ARM, PowerPC
(Jacques-Henri Jourdan and Xavier Leroy,
report and testing by Stéphane Glondu)
- PR#6235: Issue with type information flowing through a variant pattern
(Jacques Garrigue, report by Hongbo Zhang)
- PR#6239: sometimes wrong stack alignment when raising exceptions
in -g mode with backtraces active
(Xavier Leroy, report by Yaron Minsky)
- PR#6240: Fail to expand module type abbreviation during substyping
(Jacques Garrigue, report by Leo White)
- PR#6241: Assumed inequality between paths involving functor arguments
(Jacques Garrigue, report by Jeremy Yallop)
- PR#6243: Make "ocamlopt -g" more resistant to ill-formed locations
(Xavier Leroy, report by Pierre-Marie Pédrot)
- PR#6262: equality of first-class modules take module aliases into account
(Alain Frisch and Leo White)
- PR#6267: more information printed by "bt" command of ocamldebug
(Josh Watzman)
- PR#6268: -DMODEL_$(MODEL) not passed when building asmrun/arm.p.o
(Peter Michael Green)
- PR#6273: fix Sys.file_exists on large files (Win32)
(Christoph Bauer)
- PR#6275: Soundness bug related to type constraints
(Jacques Garrigue, report by Leo White)
- PR#6293: Assert_failure with invalid package type
(Jacques Garrigue, report by Elnatan Reisner)
- PR#6302: bytecode debug information re-read from filesystem every time
(Jacques-Henri Jourdan)
- PR#6307: Behavior of 'module type of' w.r.t. module aliases
(Jacques Garrigue, report by Alain Frisch)
- PR#6346: Build failure with latest version of xcode on OSX
(Jérémie Dimino)
- PR#6348: Unification failure for GADT when original definition is hidden
(Leo White and Jacques Garrigue, report by Jeremy Yallop)
- PR#6352: Automatic removal of optional arguments and sequencing
(Jacques Garrigue and Alain Frisch)
- PR#6361: Hashtbl.hash not terminating on some lazy values w/ recursive types
(Xavier Leroy, report by Leo White)
- PR#6383: Exception Not_found when using object type in absent module
(Jacques Garrigue, report by Sébastien Briais)
- PR#6384: Uncaught Not_found exception with a hidden .cmi file
(Leo White)
- PR#6385: wrong allocation of large closures by the bytecode interpreter
(Xavier Leroy, report by Stephen Dolan)
- PR#6394: Assertion failed in Typecore.expand_path
(Alain Frisch and Jacques Garrigue)
- PR#6405: unsound interaction of -rectypes and GADTs
(Jacques Garrigue, report by Gabriel Scherer and Benoît Vaugon)
- fix -dsource printing of "external _pipe = ..."
(Gabriel Scherer)
- bound-checking bug in caml_string_{get,set}{16,32,64}
(Pierre Chambart and Gabriel Scherer, report by Nicolas Trangez)
- sometimes wrong stack alignment at out-of-bounds array access
(Gabriel Scherer and Xavier Leroy, report by Pierre Chambart)
Features wishes:
- PR#4243: make the Makefiles parallelizable
(Grégoire Henry and Damien Doligez)
- PR#4323: have "of_string" in Num and Big_int work with binary and
hex representations
(Zoe Paraskevopoulou, review by Gabriel Scherer)
- PR#5650: Camlp4FoldGenerator doesn't handle well "abstract" types
(Hongbo Zhang)
- PR#5808: allow simple patterns, not just identifiers, in "let p : t = ..."
(Alain Frisch)
- PR#6000 comment 9644: add a warning for non-principal coercions to format
(Jacques Garrigue, report by Damien Doligez)
- PR#6054: add support for M.[ foo ], M.[| foo |] etc.
(Kaustuv Chaudhuri)
- PR#6064: GADT representation for Bigarray.kind + CAML_BA_CHAR runtime kind
(Jeremy Yallop, review by Gabriel Scherer)
- PR#6071: Add a -noinit option to the toplevel
(David Sheets)
- PR#6166: document -ocamldoc option of ocamlbuild
(Xavier Clerc)
- PR#6187: ocamlbuild: warn when using -plugin-tag(s) without myocamlbuild.ml
(Jacques-Pascal Deplaix)
- PR#6246: allow wilcard _ as for-loop index
(Alain Frisch, request by ygrek)
- PR#6270: remove need for -I directives to ocamldebug in common case
(Josh Watzman, review by Xavier Clerc and Alain Frisch)
- PR#6358: obey DESTDIR in install targets
(Gabriel Scherer, request by François Berenger)
- PR#5899: a programmer-friendly access to backtrace information
(Jacques-Henri Jourdan and Gabriel Scherer)
- ocamllex: user-definable refill action
(Frédéric Bour, review by Gabriel Scherer and Luc Maranget)
- shorten syntax for functor signatures: "functor (M1:S1) (M2:S2) .. -> .."
(Thomas Gazagnaire and Jeremy Yallop, review by Gabriel Scherer)
OCaml 4.01.0:
-------------
(Changes that can break existing programs are marked with a "*")
Other libraries:
- Labltk: updated to Tcl/Tk 8.6.
Type system:
- PR#5759: use well-disciplined type information propagation to
disambiguate label and constructor names
(Jacques Garrigue, Alain Frisch and Leo P. White)
* Propagate type information towards pattern-matching, even in the presence of
polymorphic variants (discarding only information about possibly-present
constructors). As a result, matching against absent constructors is no longer
allowed for exact and fixed polymorphic variant types.
(Jacques Garrigue)
* PR#6035: Reject multiple declarations of the same method or instance variable
in an object
(Alain Frisch)
Compilers:
- PR#5861: raise an error when multiple private keywords are used in type
declarations
(Hongbo Zhang)
- PR#5634: parsetree rewriter (-ppx flag)
(Alain Frisch)
- ocamldep now supports -absname
(Alain Frisch)
- PR#5768: On "unbound identifier" errors, use spell-checking to suggest names
present in the environment
(Gabriel Scherer)
- ocamlc has a new option -dsource to visualize the parsetree
(Alain Frisch, Hongbo Zhang)
- tools/eqparsetree compares two parsetree ignoring location
(Hongbo Zhang)
- ocamlopt now uses clang as assembler on OS X if available, which enables
CFI support for OS X.
(Benedikt Meurer)
- Added a new -short-paths option, which attempts to use the shortest
representation for type constructors inside types, taking open modules
into account. This can make types much more readable if your code
uses lots of functors.
(Jacques Garrigue)
- PR#5986: added flag -compat-32 to ocamlc, ensuring that the generated
bytecode executable can be loaded on 32-bit hosts.
(Xavier Leroy)
- PR#5980: warning on open statements which shadow an existing
identifier (if it is actually used in the scope of the open); new
open! syntax to silence it locally
(Alain Frisch, thanks to a report of Daniel Bünzli)
* warning 3 is extended to warn about other deprecated features:
- ISO-latin1 characters in identifiers
- uses of the (&) and (or) operators instead of (&&) and (||)
(Damien Doligez)
- Experimental OCAMLPARAM for ocamlc and ocamlopt
(Fabrice Le Fessant)
- PR#5571: incorrect ordinal number in error message
(Alain Frisch, report by John Carr)
- PR#6073: add signature to Tstr_include
(patch by Leo P. White)
Standard library:
- PR#5899: expose a way to inspect the current call stack,
Printexc.get_callstack
(Gabriel Scherer, Jacques-Henri Jourdan, Alain Frisch)
- PR#5986: new flag Marshal.Compat_32 for the serialization functions
(Marshal.to_*), forcing the output to be readable on 32-bit hosts.
(Xavier Leroy)
- infix application operators |> and @@ in Pervasives
(Fabrice Le Fessant)
- PR#6176: new Format.asprintf function with a %a formatter
compatible with Format.fprintf (unlike Format.sprintf)
(Pierre Weis)
Other libraries:
- PR#5568: add O_CLOEXEC flag to Unix.openfile, so that the returned
file descriptor is created in close-on-exec mode
(Xavier Leroy)
Runtime system:
* PR#6019: more efficient implementation of caml_modify() and caml_initialize().
The new implementations are less lenient than the old ones: now,
the destination pointer of caml_modify() must point within the minor or
major heaps, and the destination pointer of caml_initialize() must
point within the major heap.
(Xavier Leroy, from an experiment by Brian Nigito, with feedback
from Yaron Minsky and Gerd Stolpmann)
Internals:
- Moved debugger/envaux.ml to typing/envaux.ml to publish env_of_only_summary
as part of compilerlibs, to be used on bin-annot files.
(Fabrice Le Fessant)
- The test suite can now be run without installing OCaml first.
(Damien Doligez)
Bug fixes:
- PR#3236: Document the fact that queues are not thread-safe
(Damien Doligez)
- PR#3468: (part 1) Sys_error documentation
(Damien Doligez)
- PR#3679: Warning display problems
(Fabrice Le Fessant)
- PR#3963: Graphics.wait_next_event in Win32 hangs if window closed
(Damien Doligez)
- PR#4079: Queue.copy is now tail-recursive
(patch by Christophe Papazian)
- PR#4138: Documentation for Unix.mkdir
(Damien Doligez)
- PR#4469: emacs mode: caml-set-compile-command is annoying with ocamlbuild
(Daniel Bünzli)
- PR#4485: Graphics: Keyboard events incorrectly delivered in native code
(Damien Doligez, report by Sharvil Nanavati)
- PR#4502: ocamlbuild now reliably excludes the build-dir from hygiene check
(Gabriel Scherer, report by Romain Bardou)
- PR#4762: ?? is not used at all, but registered as a lexer token
(Alain Frisch)
- PR#4788: wrong error message when executable file is not found for backtrace
(Damien Doligez, report by Claudio Sacerdoti Coen)
- PR#4812: otherlibs/unix: add extern int code_of_unix_error (value error);
(Goswin von Berdelow)
- PR#4887: input_char after close_in crashes ocaml (msvc runtime)
(Alain Frisch and Christoph Bauer, report by ygrek)
- PR#4994: ocaml-mode doesn't work with xemacs21
(Damien Doligez, report by Stéphane Glondu)
- PR#5098: creating module values may lead to memory leaks
(Alain Frisch, report by Milan Stanojević)
- PR#5102: ocamlbuild fails when using an unbound variable in rule dependency
(Xavier Clerc, report by Daniel Bünzli)
* PR#5119: camlp4 now raises a specific exception when 'DELETE_RULE' fails,
rather than raising 'Not_found'
(ygrek)
- PR#5121: %( %) in Format module seems to be broken
(Pierre Weis, first patch by Valentin Gatien-Baron, report by Khoo Yit Phang)
- PR#5178: document in INSTALL how to build a 32-bit version under Linux x86-64
(Benjamin Monate)
- PR#5212: Improve ocamlbuild error messages of _tags parser
(ygrek)
- PR#5240: register exception printers for Unix.Unix_error and Dynlink.Error
(Jérémie Dimino)
- PR#5300: ocamlbuild: verbose parameter should implicitly set classic display
(Xavier Clerc, report by Robert Jakob)
- PR#5327: (Windows) Unix.select blocks if same socket listed in first and
third arguments
(David Allsopp, displaying impressive MSDN skills)
- PR#5343: ocaml -rectypes is unsound wrt module subtyping (was still unsound)
(Jacques Garrigue)
- PR#5350: missing return code checks in the runtime system
(Xavier Leroy)
- PR#5468: ocamlbuild should preserve order of parametric tags
(Wojciech Meyer, report by Dario Texeira)
- PR#5551: Avoid repeated lookups for missing cmi files
(Alain Frisch)
- PR#5552: unrecognized gcc option -no-cpp-precomp
(Damien Doligez, report by Markus Mottl)
* PR#5580: missed opportunities for constant propagation
(Xavier Leroy and John Carr)
- PR#5611: avoid clashes betwen .cmo files and output files during linking
(Wojciech Meyer)
- PR#5662: typo in md5.c
(Olivier Andrieu)
- PR#5673: type equality in a polymorphic field
(Jacques Garrigue, report by Jean-Louis Giavitto)
- PR#5674: Methods call are 2 times slower with 4.00 than with 3.12
(Jacques Garrigue, Gabriel Scherer, report by Jean-Louis Giavitto)
- PR#5694: Exception raised by type checker
(Jacques Garrigue, report by Markus Mottl)
- PR#5695: remove warnings on sparc code emitter
(Fabrice Le Fessant)
- PR#5697: better location for warnings on statement expressions
(Dan Bensen)
- PR#5698: remove harcoded limit of 200000 labels in emitaux.ml
(Fabrice Le Fessant, report by Marcin Sawicki)
- PR#5702: bytecomp/bytelibrarian lib_sharedobjs was defined but never used
(Hongbo Zhang, Fabrice Le Fessant)
- PR#5708: catch Failure"int_of_string" in ocamldebug
(Fabrice Le Fessant, report by user 'schommer')
- PR#5712: (9) new option -bin-annot is not documented
(Damien Doligez, report by Hendrik Tews)
- PR#5731: instruction scheduling forgot to account for destroyed registers
(Xavier Leroy, Benedikt Meurer, reported by Jeffrey Scofield)
- PR#5734: improved Win32 implementation of Unix.gettimeofday
(David Allsopp)
- PR#5735: %apply and %revapply not first class citizens
(Fabrice Le Fessant, reported by Jun Furuse)
- PR#5738: first class module patterns not handled by ocamldep
(Fabrice Le Fessant, Jacques Garrigue, reported by Hongbo Zhang)
- PR#5739: Printf.printf "%F" (-.nan) returns -nan
(Xavier Leroy, David Allsopp, reported by Samuel Mimram)
- PR#5741: make pprintast.ml in compiler_libs
(Alain Frisch, Hongbo Zhang)
- PR#5747: 'unused open' warning not given when compiling with -annot
(Alain Frisch, reported by Valentin Gatien-Baron)
- PR#5752: missing dependencies at byte-code link with mlpack
(Wojciech Meyer, Nicholas Lucaroni)
- PR#5763: ocamlbuild does not give correct flags when running menhir
(Gabriel Scherer, reported by Philippe Veber)
- PR#5765: ocamllex doesn't preserve line directives
(Damien Doligez, reported by Martin Jambon)
- PR#5770: Syntax error messages involving unclosed parens are sometimes
incorrect
(Michel Mauny)
- PR#5772: problem with marshaling of mutually-recursive functions
(Jacques-Henri Jourdan, reported by Cédric Pasteur)
- PR#5775: several bug fixes for tools/pprintast.ml
(Hongbo Zhang)
- PR#5784: -dclambda option is ignored
(Pierre Chambart)
- PR#5785: misbehaviour with abstracted structural type used as GADT index
(Jacques Garrigue, report by Jeremy Yallop)
- PR#5787: Bad behavior of 'Unused ...' warnings in the toplevel
(Alain Frisch)
- PR#5793: integer marshalling is inconsistent between architectures
(Xavier Clerc, report by Pierre-Marie Pédrot)
- PR#5798: add ARM VFPv2 support for Raspbian (ocamlopt)
(Jeffrey Scofield and Anil Madhavapeddy, patch review by Benedikt Meurer)
- PR#5802: Avoiding "let" as a value name
(Jacques Garrigue, report by Tiphaine Turpin)
- PR#5805: Assert failure with warning 34 on pre-processed file
(Alain Frisch, report by Tiphaine Turpin)
- PR#5806: ensure that backtrace tests are always run (testsuite)
(Xavier Clerc, report by user 'michi')
- PR#5809: Generating .cmt files takes a long time, in case of type error
(Alain Frisch)
- PR#5810: error in switch printing when using -dclambda
(Pierre Chambart)
- PR#5811: Untypeast produces singleton tuples for constructor patterns
with only one argument
(Tiphaine Turpin)
- PR#5813: GC not called when unmarshaling repeatedly in a tight loop (ocamlopt)
(Xavier Leroy, report by David Waern)
- PR#5814: read_cmt -annot does not report internal references
(Alain Frisch)
- PR#5815: Multiple exceptions in signatures gives an error
(Leo P. White)
- PR#5816: read_cmt -annot does not work for partial .cmt files
(Alain Frisch)
- PR#5819: segfault when using [with] on large recursive record (ocamlopt)
(Xavier Leroy, Damien Doligez)
- PR#5821: Wrong record field is reported as duplicate
(Alain Frisch, report by Martin Jambon)
- PR#5824: Generate more efficient code for immediate right shifts.
(Pierre Chambart, review by Xavier Leroy)
- PR#5825: Add a toplevel primitive to use source file wrapped with the
coresponding module
(Grégoire Henry, Wojciech Meyer, caml-list discussion)
- PR#5833: README.win32 can leave the wrong flexlink in the path
(Damien Doligez, report by William Smith)
- PR#5835: nonoptional labeled arguments can be passed with '?'
(Jacques Garrigue, report by Elnatan Reisner)
- PR#5840: improved documentation for 'Unix.lseek'
(Xavier Clerc, report by Matej Košík)
- PR#5848: Assertion failure in type checker
(Jacques Garrigue, Alain Frisch, report by David Waern)
- PR#5858: Assert failure during typing of class
(Jacques Garrigue, report by Julien Signoles)
- PR#5865: assert failure when reporting undefined field label
(Jacques Garrigue, report by Anil Madhavapeddy)
- PR#5872: Performance: Buffer.add_char is not inlined
(Gerd Stolpmann, Damien Doligez)
- PR#5876: Uncaught exception with a typing error
(Alain Frisch, Gabriel Scherer, report by Julien Moutinho)
- PR#5877: multiple "open" can become expensive in memory
(Fabrice Le Fessant and Alain Frisch)
- PR#5880: 'Genlex.make_lexer' documention mentions the wrong exception
(Xavier Clerc, report by Virgile Prevosto)
- PR#5885: Incorrect rule for compiling C stubs when shared libraries are not
supported.
(Jérôme Vouillon)
- PR#5891: ocamlbuild: support rectypes tag for mlpack
(Khoo Yit Phang)
- PR#5892: GADT exhaustiveness check is broken
(Jacques Garrigue and Leo P. White)
- PR#5906: GADT exhaustiveness check is still broken
(Jacques Garrigue, report by Sébastien Briais)
- PR#5907: Undetected cycle during typecheck causes exceptions
(Jacques Garrigue, report by Pascal Zimmer)
- PR#5910: Fix code generation bug for "mod 1" on ARM.
(Benedikt Meurer, report by user 'jteg68')
- PR#5911: Signature substitutions fail in submodules
(Jacques Garrigue, report by Markus Mottl)
- PR#5912: add configure option -no-cfi (for OSX 10.6.x with XCode 4.0.2)
(Damien Doligez against XCode versions, report by Thomas Gazagnaire)
- PR#5914: Functor breaks with an equivalent argument signature
(Jacques Garrigue, report by Markus Mottl and Grégoire Henry)
- PR#5920, PR#5957: linking failure for big bytecodes on 32bit architectures
(Benoît Vaugon and Chet Murthy, report by Jun Furuse and Sebastien Mondet)
- PR#5928: Missing space between words in manual page for ocamlmktop
(Damien Doligez, report by Matej Košík)
- PR#5930: ocamldep leaks temporary preprocessing files
(Gabriel Scherer, report by Valentin Gatien-Baron)
- PR#5933: Linking is slow when there are functions with large arities
(Valentin Gatien-Baron, review by Gabriel Scherer)
- PR#5934: integer shift by negative amount (in otherlibs/num)
(Xavier Leroy, report by John Regehr)
- PR#5944: Bad typing performances of big variant type declaration
(Benoît Vaugon)
- PR#5945: Mix-up of Minor_heap_min and Minor_heap_max units
(Benoît Vaugon)
- PR#5948: GADT with polymorphic variants bug
(Jacques Garrigue, report by Leo P. White)
- PR#5953: Unix.system does not handle EINTR
(Jérémie Dimino)
- PR#5965: disallow auto-reference to a recursive module in its definition
(Alain Frisch, report by Arthur Windler via Gabriel Scherer)
- PR#5973: Format module incorrectly parses format string
(Pierre Weis, report by Frédéric Bour)
- PR#5974: better documentation for Str.regexp
(Damien Doligez, report by william)
- PR#5976: crash after recovering from two stack overflows (ocamlopt on MacOS X)
(Xavier Leroy, report by Pierre Boutillier)
- PR#5977: Build failure on raspberry pi: "input_value: integer too large"
(Alain Frisch, report by Sylvain Le Gall)
- PR#5981: Incompatibility check assumes abstracted types are injective
(Jacques Garrigue, report by Jeremy Yallop)
- PR#5982: caml_leave_blocking section and errno corruption
(Jérémie Dimino)
- PR#5985: Unexpected interaction between variance and GADTs
(Jacques Garrigue, Jeremy Yallop and Leo P. White and Gabriel Scherer)
- PR#5988: missing from the documentation: -impl is a valid flag for ocamlopt
(Damien Doligez, report by Vincent Bernardoff)
- PR#5989: Assumed inequalities involving private rows
(Jacques Garrigue, report by Jeremy Yallop)
- PR#5992: Crash when pattern-matching lazy values modifies the scrutinee
(Luc Maranget, Leo P. White)
- PR#5993: Variance of private type abbreviations not checked for modules
(Jacques Garrigue)
- PR#5997: Non-compatibility assumed for concrete types with same constructor
(Jacques Garrigue, report by Gabriel Scherer)
- PR#6004: Type information does not flow to "inherit" parameters
(Jacques Garrigue, report by Alain Frisch)
- PR#6005: Type unsoundness with recursive modules
(Jacques Garrigue, report by Jérémie Dimino and Josh Berdine)
- PR#6010: Big_int.extract_big_int gives wrong results on negative arguments
(Xavier Leroy, report by Drake Wilson via Stéphane Glondu)
- PR#6024: Format syntax for printing @ is incompatible with 3.12.1
(Damien Doligez, report by Boris Yakobowski)
- PR#6001: Reduce the memory used by compiling Camlp4
(Hongbo Zhang and Gabriel Scherer, report by Henri Gouraud)
- PR#6031: Camomile problem with -with-frame-pointers
(Fabrice Le Fessant, report by Anil Madhavapeddy)
- PR#6032: better Random.self_init under Windows
(Alain Frisch, Xavier Leroy)
- PR#6033: Matching.inline_lazy_force needs eta-expansion (command-line flags)
(Pierre Chambart, Xavier Leroy and Luc Maranget,
regression report by Gabriel Scherer)
- PR#6046: testsuite picks up the wrong ocamlrun dlls
(Anil Madhavapeddy)
- PR#6056: Using 'match' prevents generalization of values
(Jacques Garrigue, report by Elnatan Reisner)
- PR#6058: 'ocamlbuild -use-ocamlfind -tag thread -package threads t.cma' fails
(Gabriel Scherer, report by Hezekiah M. Carty)
- PR#6060: ocamlbuild rules for -principal, -strict-sequence and -short-paths
(Anil Madhavapeddy)
- PR#6069: ocamldoc: lexing: empty token
(Maxence Guesdon, Grégoire Henry, report by ygrek)
- PR#6072: configure does not handle FreeBSD current (i.e. 10) correctly
(Damien Doligez, report by Prashanth Mundkur)
- PR#6074: Wrong error message for failing Condition.broadcast
(Markus Mottl)
- PR#6084: Define caml_modify and caml_initialize as weak symbols to help
with Netmulticore
(Xavier Leroy, Gerd Stolpmann)
- PR#6090: Module constraint + private type seems broken in ocaml 4.01.0
(Jacques Garrigue, report by Jacques-Pascal Deplaix)
- PR#6109: Typos in ocamlbuild error messages
(Gabriel Kerneis)
- PR#6123: Assert failure when self escapes its class
(Jacques Garrigue, report by whitequark)
- PR#6158: Fatal error using GADTs
(Jacques Garrigue, report by Jeremy Yallop)
- PR#6163: Assert_failure using polymorphic variants in GADTs
(Jacques Garrigue, report by Leo P. White)
- PR#6164: segmentation fault on Num.power_num of 0/1
(Fabrice Le Fessant, report by Johannes Kanig)
- PR#6210: Camlp4 location error
(Hongbo Zhang, report by Jun Furuse)
Feature wishes:
- PR#5181: Merge common floating point constants in ocamlopt
(Benedikt Meurer)
- PR#5243: improve the ocamlbuild API documentation in signatures.mli
(Christophe Troestler)
- PR#5546: moving a function into an internal module slows down its use
(Alain Frisch, report by Fabrice Le Fessant)
- PR#5597: add instruction trace option 't' to OCAMLRUNPARAM
(Anil Madhavapeddy, Wojciech Meyer)
- PR#5676: IPv6 support under Windows
(Jérôme Vouillon, review by Jonathan Protzenko)
- PR#5721: configure -with-frame-pointers for Linux perf profiling
(Fabrice Le Fessant, test by Jérémie Dimino)
- PR#5722: toplevel: print full module path only for first record field
(Jacques Garrigue, report by ygrek)
- PR#5762: Add primitives for fast access to bigarray dimensions
(Pierre Chambart)
- PR#5769: Allow propagation of Sys.big_endian in native code
(Pierre Chambart, stealth commit by Fabrice Le Fessant)
- PR#5771: Add primitives for reading 2, 4, 8 bytes in strings and bigarrays
(Pierre Chambart)
- PR#5774: Add bswap primitives for amd64 and arm
(Pierre Chambart, test by Alain Frisch)
- PR#5795: Generate sqrtsd opcode instead of external call to sqrt on amd64
(Pierre Chambart)
- PR#5827: provide a dynamic command line parsing mechanism
(Hongbo Zhang)
- PR#5832: patch to improve "wrong file naming" error messages
(William Smith)
- PR#5864: Add a find operation to Set
(François Berenger)
- PR#5886: Small changes to compile for Android
(Jérôme Vouillon, review by Benedikt Meurer)
- PR#5902: -ppx based pre-processor executables accept arguments
(Alain Frisch, report by Wojciech Meyer)
- PR#5986: Protect against marshaling 64-bit integers in bytecode
(Xavier Leroy, report by Alain Frisch)
- PR#6049: support for OpenBSD/macppc platform
(Anil Madhavapeddy, review by Benedikt Meurer)
- PR#6059: add -output-obj rules for ocamlbuild
(Anil Madhavapeddy)
Tools:
- OCamlbuild now features a bin_annot tag to generate .cmt files.
(Jonathan Protzenko)
- OCamlbuild now features a strict_sequence tag to trigger the
strict-sequence option.
(Jonathan Protzenko)
- OCamlbuild now picks the non-core tools like ocamlfind and menhir from PATH
(Wojciech Meyer)
- PR#5884: Misc minor fixes and cleanup for emacs mode
(Stefan Monnier)
- PR#6030: Improve performance of -annot
(Guillaume Melquiond, Alain Frisch)
OCaml 4.00.1:
-------------
Bug fixes:
- PR#4019: better documentation of Str.matched_string
- PR#5111: ocamldoc, heading tags inside spans tags is illegal in html
- PR#5278: better error message when typing "make"
- PR#5468: ocamlbuild should preserve order of parametric tags
- PR#5563: harden Unix.select against file descriptors above FD_SETSIZE
- PR#5690: "ocamldoc ... -text README" raises exception
- PR#5700: crash with native-code stack backtraces under MacOS 10.8 x86-64
- PR#5707: AMD64 code generator: do not use r10 and r11 for parameter passing,
as these registers can be destroyed by the dynamic loader
- PR#5712: some documentation problems
- PR#5715: configuring with -no-shared-libs breaks under cygwin
- PR#5718: false positive on 'unused constructor' warning
- PR#5719: ocamlyacc generates code that is not warning 33-compliant
- PR#5725: ocamldoc output of preformatted code
- PR#5727: emacs caml-mode indents shebang line in toplevel scripts
- PR#5729: tools/untypeast.ml creates unary Pexp_tuple
- PR#5731: instruction scheduling forgot to account for destroyed registers
- PR#5735: %apply and %revapply not first class citizens
- PR#5738: first class module patterns not handled by ocamldep
- PR#5742: missing bound checks in Array.sub
- PR#5744: ocamldoc error on "val virtual"
- PR#5757: GC compaction bug (crash)
- PR#5758: Compiler bug when matching on floats
- PR#5761: Incorrect bigarray custom block size
OCaml 4.00.0:
-------------
(Changes that can break existing programs are marked with a "*")
- The official name of the language is now OCaml.
Language features:
- Added Generalized Algebraic Data Types (GADTs) to the language.
See chapter "Language extensions" of the reference manual for documentation.
- It is now possible to omit type annotations when packing and unpacking
first-class modules. The type-checker attempts to infer it from the context.
Using the -principal option guarantees forward compatibility.
- New (module M) and (module M : S) syntax in patterns, for immediate
unpacking of a first-class module.
Compilers:
- Revised simplification of let-alias (PR#5205, PR#5288)
- Better reporting of compiler version mismatch in .cmi files
* Warning 28 is now enabled by default.
- New option -absname to use absolute paths in error messages
- Optimize away compile-time beta-redexes, e.g. (fun x y -> e) a b.
- Added option -bin-annot to dump the AST with type annotations.
- Added lots of new warnings about unused variables, opens, fields,
constructors, etc.
* New meaning for warning 7: it is now triggered when a method is overridden
with the "method" keyword. Use "method!" to avoid the warning.
Native-code compiler:
- Optimized handling of partially-applied functions (PR#5287)
- Small improvements in code generated for array bounds checks (PR#5345,
PR#5360).
* New ARM backend (PR#5433):
. Supports both Linux/EABI (armel) and Linux/EABI+VFPv3 (armhf).
. Added support for the Thumb-2 instruction set with average code size
savings of 28%.
. Added support for position-independent code, natdynlink, profiling and
exception backtraces.
- Generation of CFI information, and filename/line number debugging (with -g)
annotations, enabling in particular precise stack backtraces with
the gdb debugger. Currently supported for x86 32-bits and 64-bits only.
(PR#5487)
- New tool: ocamloptp, the equivalent of ocamlcp for the native-code compiler.
OCamldoc:
- PR#5645: ocamldoc doesn't handle module/type substitution in signatures
- PR#5544: improve HTML output (less formatting in html code)
- PR#5522: allow refering to record fields and variant constructors
- fix PR#5419 (error message in french)
- fix PR#5535 (no cross ref to class after dump+load)
* Use first class modules for custom generators, to be able to
load various plugins incrementally adding features to the current
generator
* PR#5507: Use Location.t structures for locations.
- fix: do not keep code when not told to keep code.
Standard library:
- Added float functions "hypot" and "copysign" (PR#3806, PR#4752, PR#5246)
* Arg: options with empty doc strings are no longer included in the usage string
(PR#5437)
- Array: faster implementations of "blit", "copy", "sub", "append" and "concat"
(PR#2395, PR#2787, PR#4591)
* Hashtbl:
. Statistically-better generic hash function based on Murmur 3 (PR#5225)
. Fixed behavior of generic hash function w.r.t. -0.0 and NaN (PR#5222)
. Added optional "random" parameter to Hashtbl.create to randomize
collision patterns and improve security (PR#5572, CVE-2012-0839)
. Added "randomize" function and "R" parameter to OCAMLRUNPARAM
to turn randomization on by default (PR#5572, CVE-2012-0839)
. Added new functorial interface "MakeSeeded" to support randomization
with user-provided seeded hash functions.
. Install new header <caml/hash.h> for C code.
- Filename: on-demand (lazy) initialization of the PRNG used by "temp_file".
- Marshal: marshalling of function values (flag Marshal.Closures) now
also works for functions that come from dynamically-loaded modules (PR#5215)
- Random:
. More random initialization (Random.self_init()), using /dev/urandom
when available (e.g. Linux, FreeBSD, MacOS X, Solaris)
* Faster implementation of Random.float (changes the generated sequences)
- Format strings for formatted input/output revised to correct PR#5380
. Consistently treat %@ as a plain @ character
. Consistently treat %% as a plain % character
- Scanf: width and precision for floating point numbers are now handled
- Scanf: new function "unescaped" (PR#3888)
- Set and Map: more efficient implementation of "filter" and "partition"
- String: new function "map" (PR#3888)
Installation procedure:
- Compiler internals are now installed in `ocamlc -where`/compiler-libs.
The files available there include the .cmi interfaces for all compiler
modules, plus the following libraries:
ocamlcommon.cma/.cmxa modules common to ocamlc, ocamlopt, ocaml
ocamlbytecomp.cma/.cmxa modules for ocamlc and ocaml
ocamloptcomp.cma/.cmxa modules specific to ocamlopt
ocamltoplevel.cma modules specific to ocaml
(PR#1804, PR#4653, frequently-asked feature).
* Some .cmi for toplevel internals that used to be installed in
`ocamlc -where` are now to be found in `ocamlc -where`/compiler-libs.
Add "-I +compiler-libs" where needed.
* toplevellib.cma is no longer installed because subsumed by
ocamlcommon.cma ocamlbytecomp.cma ocamltoplevel.cma
- Added a configuration option (-with-debug-runtime) to compile and install
a debug version of the runtime system, and a compiler option
(-runtime-variant) to select the debug runtime.
Bug Fixes:
- PR#1643: functions of the Lazy module whose named started with 'lazy_' have
been deprecated, and new ones without the prefix added
- PR#3571: in Bigarrays, call msync() before unmapping to commit changes
- PR#4292: various documentation problems
- PR#4511, PR#4838: local modules remove polymorphism
* PR#4549: Filename.dirname is not handling multiple / on Unix
- PR#4688: (Windows) special floating-point values aren't converted to strings
correctly
- PR#4697: Unix.putenv leaks memory on failure
- PR#4705: camlp4 does not allow to define types with `True or `False
- PR#4746: wrong detection of stack overflows in native code under Linux
- PR#4869: rare collisions between assembly labels for code and data
- PR#4880: "assert" constructs now show up in the exception stack backtrace
- PR#4892: Array.set could raise "out of bounds" before evaluating 3rd arg
- PR#4937: camlp4 incorrectly handles optional arguments if 'option' is
redefined
- PR#5024: camlp4r now handles underscores in irrefutable pattern matching of
records
- PR#5064, PR#5485: try to ensure that 4K words of stack are available
before calling into C functions, raising a Stack_overflow exception
otherwise. This reduces (but does not eliminate) the risk of
segmentation faults due to stack overflow in C code
- PR#5073: wrong location for 'Unbound record field label' error
- PR#5084: sub-sub-module building fails for native code compilation
- PR#5120: fix the output function of Camlp4.Debug.formatter
- PR#5131: compilation of custom runtime with g++ generates lots of warnings
- PR#5137: caml-types-explore does not work
- PR#5159: better documentation of type Lexing.position
- PR#5171: Map.join does more comparisons than needed
- PR#5176: emacs mode: stack overflow in regexp matcher
- PR#5179: port OCaml to mingw-w64
- PR#5211: updated Genlex documentation to state that camlp4 is mandatory for
'parser' keyword and associated notation
- PR#5214: ocamlfind plugin invokes 'cut' utility
- PR#5218: use $(MAKE) instead of "make" in Makefiles
- PR#5224: confusing error message in non-regular type definition
- PR#5231: camlp4: fix parsing of <:str_item< type t = $x$ >>
- PR#5233: finaliser on weak array gives dangling pointers (crash)
- PR#5238, PR#5277: Sys_error when getting error location
- PR#5261, PR#5497: Ocaml source-code examples are not "copy-paste-able"
* PR#5279: executable name is not initialized properly in caml_startup_code
- PR#5290: added hash functions for channels, nats, mutexes, conditions
- PR#5291: undetected loop in class initialization
- PR#5295: OS threads: problem with caml_c_thread_unregister()
- PR#5301: camlp4r and exception equal to another one with parameters
- PR#5305: prevent ocamlbuild from complaining about links to _build/
- PR#5306: comparing to Thread.self() raises exception at runtime
- PR#5309: Queue.add is not thread/signal safe
- PR#5310: Ratio.create_ratio/create_normalized_ratio have misleading names
- PR#5311: better message for warning 23
* PR#5312: command-line arguments @reponsefile auto-expansion feature
removed from the Windows OCaml runtime, to avoid conflicts with "-w @..."
- PR#5313: ocamlopt -g misses optimizations
- PR#5214: ocamlfind plugin invokes 'cut' utility
- PR#5316: objinfo now shows ccopts/ccobjs/force_link when applicable
- PR#5318: segfault on stack overflow when reading marshaled data
- PR#5319: %r11 clobbered by Lswitch in Windows AMD64 native-code compilation
- PR#5322: type abbreviations expanding to a universal type variable
- PR#5328: under Windows, Unix.select leaves sockets in non-blocking mode
- PR#5330: thread tag with '.top' and '.inferred.mli' targets
- PR#5331: ocamlmktop is not always a shell script
- PR#5335: Unix.environment segfaults after a call to clearenv
- PR#5338: sanitize.sh has windows style end-of-lines (mingw)
- PR#5344: some predefined exceptions need special printing
- PR#5349: Hashtbl.replace uses new key instead of reusing old key
- PR#5356: ocamlbuild handling of 'predicates' for ocamlfind
- PR#5364: wrong compilation of "((val m : SIG1) : SIG2)"
- PR#5370: ocamldep omits filename in syntax error message
- PR#5374: camlp4 creates wrong location for type definitions
- PR#5380: strange sscanf input segfault
- PR#5382: EOPNOTSUPP and ENOTSUPP different on exotic platforms
- PR#5383: build failure in Win32/MSVC
- PR#5387: camlp4: str_item and other syntactic elements with Nils are
not very usable
- PR#5389: compaction sometimes leaves a very large heap
- PR#5393: fails to build from source on GNU/kFreeBSD because of -R link option
- PR#5394: documentation for -dtypes is missing in manpage
- PR#5397: Filename.temp_dir_name should be mutable
- PR#5410: fix printing of class application with Camlp4
- PR#5416: (Windows) Unix.(set|clear)_close_on_exec now preserves blocking mode
- PR#5435: ocamlbuild does not find .opt executables on Windows
- PR#5436: update object ids on unmarshaling
- PR#5442: camlp4: quotation issue with strings
- PR#5453: configure doesn't find X11 under Ubuntu/MultiarchSpec
- PR#5461: Double linking of bytecode modules
- PR#5463: Bigarray.*.map_file fail if empty array is requested
- PR#5465: increase stack size of ocamlopt.opt for windows
- PR#5469: private record type generated by functor loses abbreviation
- PR#5475: Wrapper script for interpreted LablTk wrongly handles command line
parameters
- PR#5476: bug in native code compilation of let rec on float arrays
- PR#5477: use pkg-config to configure graphics on linux
- PR#5481: update camlp4 magic numbers
- PR#5482: remove bashism in test suite scripts
- PR#5495: camlp4o dies on infix definition (or)
- PR#5498: Unification with an empty object only checks the absence of
the first method
- PR#5503: error when ocamlbuild is passed an absolute path as build directory
- PR#5509: misclassification of statically-allocated empty array that
falls exactly at beginning of an otherwise unused data page.
- PR#5510: ocamldep has duplicate -ml{,i}-synonym options
- PR#5511: in Bigarray.reshape, unwarranted limitation on new array dimensions.
- PR#5513: Int64.div causes floating point exception (ocamlopt, x86)
- PR#5516: in Bigarray C stubs, use C99 flexible array types if possible
- PR#5518: segfault with lazy empty array
- PR#5531: Allow ocamlbuild to add ocamldoc flags through -docflag
and -docflags switches
- PR#5538: combining -i and -annot in ocamlc
- PR#5543: in Bigarray.map_file, try to avoid using lseek() when growing file
- PR#5648: (probably fixed) test failures in tests/lib-threads
- PR#5551: repeated calls to find_in_path degrade performance
- PR#5552: Mac OS X: unrecognized gcc option "-no-cpp-precomp"
- PR#5555: add Hashtbl.reset to resize the bucket table to its initial size
- PR#5560: incompatible type for tuple pattern with -principal
- PR#5575: Random states are not marshallable across architectures
- PR#5579: camlp4: when a plugin is loaded in the toplevel,
Token.Filter.define_filter has no effect before the first syntax error
- PR#5585: typo: "explicitely"
- PR#5587: documentation: "allows to" is not correct English
- PR#5593: remove C file when -output-obj fails
- PR#5597: register names for instrtrace primitives in embedded bytecode
- PR#5598: add backslash-space support in strings in ocamllex
- PR#5603: wrong .file debug info generated by ocamlopt -g
- PR#5604: fix permissions of files created by ocamlbuild itself
- PR#5610: new unmarshaler (from PR#5318) fails to freshen object identifiers
- PR#5614: add missing -linkall flag when compiling ocamldoc.opt
- PR#5616: move ocamlbuild documentation to the reference manual
- PR#5619: Uncaught CType.Unify exception in the compiler
- PR#5620: invalid printing of type manifest (camlp4 revised syntax)
- PR#5637: invalid printing of anonymous type parameters (camlp4 revised syntax)
- PR#5643: issues with .cfi and .loc directives generated by ocamlopt -g
- PR#5644: Stream.count broken when used with Sapp or Slazy nodes
- PR#5647: Cannot use install_printer in debugger
- PR#5651: printer for abstract data type (camlp4 revised syntax)
- PR#5654: self pattern variable location tweak
- PR#5655: ocamlbuild doesn't pass cflags when building C stubs
- PR#5657: wrong error location for abbreviated record fields
- PR#5659: ocamlmklib -L option breaks with MSVC
- PR#5661: fixes for the test suite
- PR#5668: Camlp4 produces invalid syntax for "let _ = ..."
- PR#5671: initialization of compare_ext field in caml_final_custom_operations()
- PR#5677: do not use "value" as identifier (genprintval.ml)
- PR#5687: dynlink broken when used from "output-obj" main program (bytecode)
- problem with printing of string literals in camlp4 (reported on caml-list)