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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)
- 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#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#5325: (Windows) blocked Unix.recv in one thread blocks Unix.send in
another thread
- 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#5343: ocaml -rectypes is unsound wrt module subtyping
- 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)
- emacs mode: colorization of comments and strings now works correctly
- problem with forall and method (reported on caml-list on 2011-07-26)
- crash when using OCAMLRUNPARAM=a=X with invalid X (reported in private)
Feature wishes:
- PR#352: new option "-stdin" to make ocaml read stdin as a script
- PR#1164: better error message when mixing -a and .cmxa
- PR#1284: documentation: remove restriction on mixed streams
- PR#1496: allow configuring LIBDIR, BINDIR, and MANDIR relative to $(PREFIX)
- PR#1835: add Digest.from_hex
- PR#1898: toplevel: add option to suppress continuation prompts
- PR#4278: configure: option to disable "graph" library
- PR#4444: new String.trim function, removing leading and trailing whistespace
- PR#4549: make Filename.dirname/basename POSIX compliant
- PR#4830: add option -v to expunge.ml
- PR#4898: new Sys.big_endian boolean for machine endianness
- PR#4963, PR#5467: no extern "C" into ocaml C-stub headers
- PR#5199: tests are run only for bytecode if either native support is missing,
or a non-empty value is set to "BYTECODE_ONLY" Makefile variable
- PR#5215: marshalling of dynlinked closure
- PR#5236: new '%revapply' primitive with the semantics 'revapply x f = f x',
and '%apply' with semantics 'apply f x = f x'.
- PR#5255: natdynlink detection on powerpc, hurd, sparc
- PR#5295: OS threads: problem with caml_c_thread_unregister()
- PR#5297: compiler now checks existence of builtin primitives
- PR#5329: (Windows) more efficient Unix.select if all fd's are sockets
- PR#5357: warning for useless open statements
- PR#5358: first class modules don't allow "with type" declarations for types
in sub-modules
- PR#5385: configure: emit a warning when MACOSX_DEPLOYMENT_TARGET is set
- PR#5396: ocamldep: add options -sort, -all, and -one-line
- PR#5397: Filename.temp_dir_name should be mutable
- PR#5403: give better error message when emacs is not found in PATH
- PR#5411: new directive for the toplevel: #load_rec
- PR#5420: Unix.openfile share mode (Windows)
- PR#5421: Unix: do not leak fds in various open_proc* functions
- PR#5434: implement Unix.times in win32unix (partially)
- PR#5438: new warnings for unused declarations
- PR#5439: upgrade config.guess and config.sub
- PR#5445 and others: better printing of types with user-provided names
- PR#5454: Digest.compare is missing and md5 doc update
- PR#5455: .emacs instructions, add lines to recognize ocaml scripts
- PR#5456: pa_macro: replace __LOCATION__ after macro expansion; add LOCATION_OF
- PR#5461: bytecode: emit warning when linking two modules with the same name
- PR#5478: ocamlopt assumes ar command exists
- PR#5479: Num.num_of_string may raise an exception, not reflected in the
documentation.
- PR#5501: increase IO_BUFFER_SIZE to 64KiB
- PR#5532: improve error message when bytecode file is wrong
- PR#5555: add function Hashtbl.reset to resize the bucket table to
its initial size.
- PR#5586: increase UNIX_BUFFER_SIZE to 64KiB
- PR#5597: register names for instrtrace primitives in embedded bytecode
- PR#5599: Add warn() tag in ocamlbuild to control -w compiler switch
- PR#5628: add #remove_directory and Topdirs.remove_directory to remove
a directory from the load path
- PR#5636: in system threads library, issue with linking of pthread_atfork
- PR#5666: C includes don't provide a revision number
- ocamldebug: ability to inspect values that contain code pointers
- ocamldebug: new 'environment' directive to set environment variables
for debuggee
- configure: add -no-camlp4 option
Shedding weight:
* Removed the obsolete native-code generators for Alpha, HPPA, IA64 and MIPS.
* The "DBM" library (interface with Unix DBM key-value stores) is no
longer part of this distribution. It now lives its own life at
https://forge.ocamlcore.org/projects/camldbm/
* The "OCamlWin" toplevel user interface for MS Windows is no longer
part of this distribution. It now lives its own life at
https://forge.ocamlcore.org/projects/ocamltopwin/
Other changes:
- Copy VERSION file to library directory when installing.
OCaml 3.12.1:
-------------
Bug fixes:
- PR#4345, PR#4767: problems with camlp4 printing of float values
- PR#4380: ocamlbuild should not use tput on windows
- PR#4487, PR#5164: multiple 'module type of' are incompatible
- PR#4552: ocamlbuild does not create symlinks when using '.itarget' file
- PR#4673, PR#5144: camlp4 fails on object copy syntax
- PR#4702: system threads: cleanup tick thread at exit
- PR#4732: camlp4 rejects polymorphic variants using keywords from macros
- PR#4778: Win32/MSVC port: rare syntax error in generated MASM assembly file
- PR#4794, PR#4959: call annotations not generated by ocamlopt
- PR#4820: revised syntax pretty printer crashes with 'Stack_overflow'
- PR#4928: wrong printing of classes and class types by camlp4
- PR#4939: camlp4 rejects patterns of the '?x:_' form
- PR#4967: ocamlbuild passes wrong switches to ocamldep through menhir
- PR#4972: mkcamlp4 does not include 'dynlink.cma'
- PR#5039: ocamlbuild should use '-linkpkg' only when linking programs
- PR#5066: ocamldoc: add -charset option used in html generator
- PR#5069: fcntl() in caml_sys_open may block, do it within blocking section
- PR#5071, PR#5129, PR#5134: inconsistencies between camlp4 and camlp4* binaries
- PR#5080, PR#5104: regression in type constructor handling by camlp4
- PR#5090: bad interaction between toplevel and camlp4
- PR#5095: ocamlbuild ignores some tags when building bytecode objects
- PR#5100: ocamlbuild always rebuilds a 'cmxs' file
- PR#5103: build and install objinfo when building with ocamlbuild
- PR#5109: crash when a parser calls a lexer that calls another parser
- PR#5110: invalid module name when using optional argument
- PR#5115: bytecode executables produced by msvc64 port crash on 32-bit versions
- PR#5117: bigarray: wrong function name without HAS_MMAP; missing include
- PR#5118: Camlp4o and integer literals
- PR#5122: camlp4 rejects lowercase identifiers for module types
- PR#5123: shift_right_big_int returns a wrong zero
- PR#5124: substitution inside a signature leads to odd printing
- PR#5128: typo in 'Camlp4ListComprehension' syntax extension
- PR#5136: obsolete function used in emacs mode
- PR#5145: ocamldoc: missing html escapes
- PR#5146: problem with spaces in multi-line string constants
- PR#5149: (partial) various documentation problems
- PR#5156: rare compiler crash with objects
- PR#5165: ocamlbuild does not pass '-thread' option to ocamlfind
- PR#5167: camlp4r loops when printing package type
- PR#5172: camlp4 support for 'module type of' construct
- PR#5175: in bigarray accesses, make sure bigarray expr is evaluated only once
- PR#5177: Gc.compact implies Gc.full_major
- PR#5182: use bytecode version of ocamldoc to generate man pages
- PR#5184: under Windows, alignment issue with bigarrays mapped from files
- PR#5188: double-free corruption in bytecode system threads
- PR#5192: mismatch between words and bytes in interpreting max_young_wosize
- PR#5202: error in documentation of atan2
- PR#5209: natdynlink incorrectly detected on BSD systems
- PR#5213: ocamlbuild should pass '-rectypes' to ocamldoc when needed
- PR#5217: ocamlfind plugin should add '-linkpkg' for toplevel
- PR#5228: document the exceptions raised by functions in 'Filename'
- PR#5229: typo in build script ('TAG_LINE' vs 'TAGLINE')
- PR#5230: error in documentation of Scanf.Scanning.open_in
- PR#5234: option -shared reverses order of -cclib options
- PR#5237: incorrect .size directives generated for x86-32 and x86-64
- PR#5244: String.compare uses polymorphic compare_val (regression of PR#4194)
- PR#5248: regression introduced while fixing PR#5118
- PR#5252: typo in docs
- PR#5258: win32unix: unix fd leak under windows
- PR#5269: (tentative fix) Wrong ext_ref entries in .annot files
- PR#5272: caml.el doesn't recognize downto as a keyword
- PR#5276: issue with ocamlc -pack and recursively-packed modules
- PR#5280: alignment constraints incorrectly autodetected on MIPS 32
- PR#5281: typo in error message
- PR#5308: unused variables not detected in "include (struct .. end)"
- camlp4 revised syntax printing bug in the toplevel (reported on caml-list)
- configure: do not define _WIN32 under cygwin
- Hardened generic comparison in the case where two custom blocks
are compared and have different sets of custom operations.
- Hardened comparison between bigarrays in the case where the two
bigarrays have different kinds.
- Fixed wrong autodetection of expm1() and log1p().
- don't add .exe suffix when installing the ocamlmktop shell script
- ocamldoc: minor fixes related to the display of ocamldoc options
- fixed bug with huge values in OCAMLRUNPARAM
- mismatch between declaration and definition of caml_major_collection_slice
Feature wishes:
- PR#4992: added '-ml-synonym' and '-mli-synonym' options to ocamldep
- PR#5065: added '-ocamldoc' option to ocamlbuild
- PR#5139: added possibility to add options to ocamlbuild
- PR#5158: added access to current camlp4 parsers and printers
- PR#5180: improved instruction selection for float operations on amd64
- stdlib: added a 'usage_string' function to Arg
- allow with constraints to add a type equation to a datatype definition
- ocamldoc: allow to merge '@before' tags like other ones
- ocamlbuild: allow dependency on file "_oasis"
Other changes:
- Changed default minor heap size from 32k to 256k words.
- Added new operation 'compare_ext' to custom blocks, called when
comparing a custom block value with an unboxed integer.
Objective Caml 3.12.0:
----------------------
(Changes that can break existing programs are marked with a "*" )
Language features:
- Shorthand notation for records: in expressions and patterns,
{ lbl } stands for { lbl = lbl } and { M.lbl } for { M.lbl = lbl }
- Record patterns of the form { lbl = pat; _ } to mark that not all
labels are listed, purposefully. (See new warning below.)
- Explicit naming of a generic type; in an expression
"fun ... (type t) ... -> e", the type t is considered abstract in its
scope (the arguments that follow it and the body of the function),
and then replaced by a fresh type variable. In particular, the type
t can be used in contexts where a type variable is not allowed
(e.g. for defining an exception in a local module).
- Explicit polymorphic types and polymorphic recursion. In let
definitions, one can write an explicit polymorphic type just
immediately the function name; the polymorphism will be enforced,
and recursive calls may use the polymorphism.
The syntax is the same as for polymorphic methods:
"let [rec] <ident> : 'a1 ... 'an. <typexp> = ..."
- First-class packages modules.
New kind of type expression, for packaged modules: (module PT).
New kind of expression, to pack a module as a first-class value:
(module MODEXPR : PT).
New kind of module expression, to unpack a first-class value as a module:
(val EXPR : PT).
PT is a package type of the form "S" or
"S with type t1 = ... and ... and type tn = ..." (S refers to a module type).
- Local opening of modules in a subexpression.
Syntax: "let open M in e", or "M.(e)"
- In class definitions, method and instance variable override can now
be made explicit, by writing "method!", "val!" or "inherit!" in place of
"method", "val" and "inherit". It is an error to override an
undefined member (or to use overriding inheritance when nothing get
overridden). Additionally, these constructs disactivate respectively
warnings 7 (method override, code 'M') and 13 (instance variable
override, code 'V'). Note that, by default, warning 7 is inactive
and warning 13 is active.
- "Destructive" substitution in signatures.
By writing "<signature> with type t := <typeconstr>" and
"<signature> with module M := <module-path>" one replaces "t" and "M"
inside the signature, removing their respective fields. Among other
uses, this allows to merge two signatures containing identically
named fields.
* While fixing PR#4824, also corrected a gaping hole in the type checker,
which allowed instantiating separately object parameters and instance
variables in an interface. This hole was here since the beginning of
ocaml, and as a result many programs using object inheritance in a non
trivial way will need to be corrected. You can look at lablgtk2 for an
example.
Compilers and toplevel:
- Warnings are now numbered and can be switched on and off individually.
The old system with letters referring to sets of warnings is still
supported.
- New warnings:
+ 9 (code 'R') to signal record patterns without "; _" where
some labels of the record type are not listed in the pattern.
+ 28 when giving a wildcard argument to a constant constructor in
a pattern-matching.
+ 29 when an end-of-line appears unescaped in a string constant.
+ 30 when the same constructor or record field is defined twice in
mutually-recursive type definitions.
* The semantics of warning 7 (code 'M', method override) have changed
(it now detects all overrides, not just repeated definitions inside
the same class body), and it is now inactive by default.
- Better error report in case of unbound qualified identifier: if the module
is unbound this error is reported in the first place.
- Added option '-strict-sequence' to force left hand part of sequence to have
type unit.
- Added option '-no-app-funct' to turn applicative functors off.
This option can help working around mysterious type incompatibilities
caused by the incomplete comparison of applicative paths F(X).t.
Native-code compiler:
- AMD64: shorter and slightly more efficient code generated for
float comparisons.
Standard library:
- Format: new function ikfprintf analoguous to ifprintf with a continuation
argument.
* PR#4210, #4245: stricter range checking in string->integer conversion
functions (int_of_string, Int32.of_string, Int64.of_string,
Nativeint.of_string). The decimal string corresponding to
max_int + 1 is no longer accepted.
- Scanf: to prevent confusion when mixing Scanf scanning functions and direct
low level input, value Scanf.stdin has been added.
* Random: changed the algorithm to produce better randomness. Now passes the
DieHard tests.
- Map: implement functions from Set that make sense for Map.
Other libraries:
* Str: letters that constitute a word now include digits 0-9 and
underscore _. This changes the interpretation of '\b' (word boundary)
in regexps, but is more consistent with other regexp libraries. (PR#4874).
Ocamlbuild:
- Add support for native dynlink.
New tool:
- ocamlobjinfo: displays various information, esp. dependencies, for
compiled OCaml files (.cmi, .cmo, .cma, .cmx, .cmxa, .cmxs, and bytecode
executables). Extends and makes more official the old objinfo tool
that was installed by some OCaml packages.
All tools:
- PR#4857: add a -vnum option to display the version number and nothing else
Bug Fixes:
- PR#4012: Map.map and Map.mapi do not conform to specification
- PR#4478: better error messages for type definition mismatches
- PR#4683: labltk script uses fixed path on windows
- PR#4742: finalisation function raising an exception blocks other finalisations
- PR#4775: compiler crash on crazy types (temporary fix)
- PR#4824: narrowing the type of class parameters with a module specification
- PR#4862: relaxed value restriction and records
- PR#4884: optional arguments do not work when Some is redefined
- PR#4964: parenthesized names for infix functions in annot files
- PR#4970: better error message for instance variables
- PR#4975: spelling mistakes
- PR#4988: contravariance lost with ocamlc -i
- PR#5004: problem in Buffer.add_channel with very large lengths.
- PR#5008: on AMD64/MSVC port, rare float corruption during GC.
- PR#5018: wrong exception raised by Dynlink.loadfile.
- PR#5057: fatal typing error with local module + functor + polymorphic variant
- Wrong type for Obj.add_offset.
- Small problem with the representation of Int32, Int64, and Nativeint constants.
- Use RTLD_LOCAL for native dynlink in private mode.
Objective Caml 3.11.2:
----------------------
Bug fixes:
- PR#4151: better documentation for min and max w.r.t. NaN
- PR#4421: ocamlbuild uses wrong compiler for C files
- PR#4710, PR#4720: ocamlbuild does not use properly configuration information
- PR#4750: under some Windows installations, high start-up times for Unix lib
- PR#4777: problem with scanf and CRLF
- PR#4783: ocamlmklib problem under Windows
- PR#4810: BSD problem with socket addresses, e.g. in Unix.getnameinfo
- PR#4813: issue with parsing of float literals by the GNU assembler
- PR#4816: problem with modules and private types
- PR#4818: missed opportunity for type-based optimization of bigarray accesses
- PR#4821: check for duplicate method names in classes
- PR#4823: build problem on Mac OS X
- PR#4836: spurious errors raised by Unix.single_write under Windows
- PR#4841, PR#4860, PR#4930: problem with ocamlopt -output-obj under Mac OS X
- PR#4847: C compiler error with ocamlc -output-obj under Win64
- PR#4856: ocamlbuild uses ocamlrun to execute a native plugin
- PR#4867, PR#4760: ocamlopt -shared fails on Mac OS X 64bit
- PR#4873: ocamlbuild ignores "thread" tag when building a custom toplevel
- PR#4890: ocamlbuild tries to use native plugin on bytecode-only arch
- PR#4896: ocamlbuild should always pass -I to tools for external libraries
- PR#4900: small bug triggering automatic compaction even if max_overhead = 1M
- PR#4902: bug in %.0F printf format
- PR#4910: problem with format concatenation
- PR#4922: ocamlbuild recompiles too many files
- PR#4923: missing \xff for scanf %S
- PR#4933: functors not handling private types correctly
- PR#4940: problem with end-of-line in DOS text mode, tentative fix
- PR#4953: problem compiling bytecode interpreter on ARM in Thumb mode.
- PR#4955: compiler crash when typing recursive type expression with constraint
- Module Printf: the simple conversion %F (without width indication) was not
treated properly.
- Makefile: problem with cygwin, flexdll, and symbolic links
- Various build problems with ocamlbuild under Windows with msvc
Feature wishes:
- PR#9: (tentative implementation) make ocamldebug use #linenum annotations
- PR#123, PR#4477: custom exception printers
- PR#3456: Obj.double_field and Obj.set_double_field functions
- PR#4003: destination directory can be given to Filename.[open_]temp_file
- PR#4647: Buffer.blit function
- PR#4685: access to Filename.dir_sep
- PR#4703: support for debugging embedded applications
- PR#4723: "clear_rules" function to empty the set of ocamlbuild rules
- PR#4921: configure option to help cross-compilers
Objective Caml 3.11.1:
----------------------
Bug fixes:
- PR#4095: ocamldebug: strange behaviour of control-C
- PR#4403: ocamldebug: improved handling of packed modules
- PR#4650: Str.regexp_case_fold mis-handling complemented character sets [^a]
- PR#4660: Scanf.format_from_string: handling of double quote
- PR#4666: Unix.exec* failure in multithread programs under MacOS X and FreeBSD
- PR#4667: debugger out of sync with dynlink changes
- PR#4678: random "out of memory" error with systhreads
- PR#4690: issue with dynamic loading under MacOS 10.5
- PR#4692: wrong error message with options -i and -pack passed to ocamlc
- PR#4699: in otherlibs/dbm, fixed construction of dlldbm.so.
- PR#4704: error in caml_modify_generational_global_root()
- PR#4708: (ocamldoc) improved printing of infix identifiers such as "lor".
- PR#4722: typo in configure script
- PR#4729: documented the fact that PF_INET6 is not available on all platforms
- PR#4730: incorrect typing involving abbreviation "type 'a t = 'a"
- PR#4731: incorrect quoting of arguments passed to the assembler on x86-64
- PR#4735: Unix.LargeFile.fstat cannot report size over 32bits on Win32
- PR#4740: guard against possible processor error in
{Int32,Int64,Nativeint}.{div,rem}
- PR#4745: type inference wrongly produced non-generalizable type variables.
- PR#4749: better pipe size for win32unix
- PR#4756: printf: no error reported for wrong format '%_s'
- PR#4758: scanf: handling of \<newline> by format '%S'
- PR#4766: incorrect simplification of some type abbreviations.
- PR#4768: printf: %F does not respect width and precision specifications
- PR#4769: Format.bprintf fails to flush
- PR#4775: fatal error Ctype.Unify during module type-checking (temporary fix)
- PR#4776: bad interaction between exceptions and classes
- PR#4780: labltk build problem under Windows.
- PR#4790: under Windows, map ERROR_NO_DATA Win32 error to EPIPE Unix error.
- PR#4792: bug in Big_int.big_int_of_int64 on 32-bit platforms.
- PR#4796: ocamlyacc: missing NUL termination of string
- PR#4804: bug in Big_int.int64_of_big_int on 32-bit platforms.
- PR#4805: improving compatibility with the clang C compiler
- PR#4809: issue with Unix.create_process under Win32
- PR#4814: ocamlbrowser: crash when editing comments
- PR#4816: module abbreviations remove 'private' type restrictions
- PR#4817: Object type gives error "Unbound type parameter .."
- Module Parsing: improved computation of locations when an ocamlyacc rule
starts with an empty nonterminal
- Type-checker: fixed wrong variance computation for private types
- x86-32 code generator, MSVC port: wrong "fld" instruction generated.
- ocamlbuild: incorrectly using the compile-time value of $OCAMLLIB
- Makefile problem when configured with -no-shared-libs
- ocamldoc: use dynamic loading in native code
Other changes:
- Improved wording of various error messages
(contributed by Jonathan Davies, Citrix).
- Support for 64-bit mode in Solaris/x86 (PR#4670).
Objective Caml 3.11.0:
----------------------
(Changes that can break existing programs are marked with a "*" )
Language features:
- Addition of lazy patterns: "lazy <pat>" matches suspensions whose values,
after forcing, match the pattern <pat>.
- Introduction of private abbreviation types "type t = private <type-expr>",
for abstracting the actual manifest type in type abbreviations.
- Subtyping is now allowed between a private abbreviation and its definition,
and between a polymorphic method and its monomorphic instance.
Compilers:
- The file name for a compilation unit should correspond to a valid
identifier (Otherwise dynamic linking and other things can fail, and
a warning is emitted.)
* Revised -output-obj: the output name must now be provided; its
extension must be one of .o/.obj, .so/.dll, or .c for the
bytecode compiler. The compilers can now produce a shared library
(with all the needed -ccopts/-ccobjs options) directly.
- -dtypes renamed to -annot, records (in .annot files) which function calls
are tail calls.
- All compiler error messages now include a file name and location, for
better interaction with Emacs' compilation mode.
- Optimized compilation of "lazy e" when the argument "e" is
already evaluated.
- Optimized compilation of equality tests with a variant constant constructor.
- The -dllib options recorded in libraries are no longer ignored when
-use_runtime or -use_prims is used (unless -no_auto_link is
explicitly used).
- Check that at most one of -pack, -a, -shared, -c, -output-obj is
given on the command line.
- Optimized compilation of private types as regular manifest types
(e.g. abbreviation to float, float array or record types with only
float fields).
Native-code compiler:
- New port: Mac OS X / Intel in 64-bit mode (configure with -cc "gcc -m64").
- A new option "-shared" to produce a plugin that can be dynamically
loaded with the native version of Dynlink.
- A new option "-nodynlink" to enable optimizations valid only for code
that is never dynlinked (no-op except for AMD64).
- More aggressive unboxing of floats and boxed integers.
- Can select which assembler and asm options to use at configuration time.
Run-time system:
- New implementation of the page table describing the heap (two-level
array in 32 bits, sparse hashtable in 64 bits), fixes issues with address
space randomization on 64-bit OS (PR#4448).
- New "generational" API for registering global memory roots with the GC,
enables faster scanning of global roots.
(The functions are caml_*_generational_global_root in <caml/memory.h>.)
- New function "caml_raise_with_args" to raise an exception with several
arguments from C.
- Changes in implementation of dynamic linking of C code:
under Win32, use Alain Frisch's flexdll implementation of the dlopen
API; under MacOSX, use dlopen API instead of MacOSX bundle API.
- Programs may now choose a first-fit allocation policy instead of
the default next-fit. First-fit reduces fragmentation but is
slightly slower in some cases.
Standard library:
- Parsing library: new function "set_trace" to programmatically turn
on or off the printing of a trace during parsing.
- Printexc library: new functions "print_backtrace" and "get_backtrace"
to obtain a stack backtrace of the most recently raised exception.
New function "record_backtrace" to turn the exception backtrace mechanism
on or off from within a program.
- Scanf library: fine-tuning of meta format implementation;
fscanf behaviour revisited: only one input buffer is allocated for any
given input channel;
the %n conversion does not count a lookahead character as read.
Other libraries:
- Dynlink: on some platforms, the Dynlink library is now available in
native code. The boolean Dynlink.is_native allows the program to
know whether it has been compiled in bytecode or in native code.
- Bigarrays: added "unsafe_get" and "unsafe_set"
(non-bound-checking versions of "get" and "set").
- Bigarrays: removed limitation "array dimension < 2^31".
- Labltk: added support for TK 8.5.
- Num: added conversions between big_int and int32, nativeint, int64.
More efficient implementation of Num.quo_num and Num.mod_num.
- Threads: improved efficiency of mutex and condition variable operations;
improved interaction with Unix.fork (PR#4577).
- Unix: added getsockopt_error returning type Unix.error.
Added support for TCP_NODELAY and IPV6_ONLY socket options.
- Win32 Unix: "select" now supports all kinds of file descriptors.
Improved emulation of "lockf" (PR#4609).
Tools:
- ocamldebug now supported under Windows (MSVC and Mingw ports),
but without the replay feature. (Contributed by Dmitry Bely
and Sylvain Le Gall at OCamlCore with support from Lexifi.)
- ocamldoc: new option -no-module-constraint-filter to include functions
hidden by signature constraint in documentation.
- ocamlmklib and ocamldep.opt now available under Windows ports.
- ocamlmklib no longer supports the -implib option.
- ocamlnat: an experimental native toplevel (not built by default).
Camlp4:
* programs linked with camlp4lib.cma now also need dynlink.cma.
Bug fixes:
- Major GC and heap compaction: fixed bug involving lazy values and
out-of-heap pointers.
- PR#3915: updated most man pages.
- PR#4261: type-checking of recursive modules
- PR#4308: better stack backtraces for "spontaneous" exceptions such as
Stack_overflow, Out_of_memory, etc.
- PR#4338: Str.global_substitute, Str.global_replace and the Str.*split*
functions are now tail-recursive.
- PR#4503: fixed bug in classify_float on ARM.
- PR#4512: type-checking of recursive modules
- PR#4517: crash in ocamllex-generated lexers.
- PR#4542: problem with return value of Unix.nice.
- PR#4557: type-checking of recursive modules.
- PR#4562: strange %n semantics in scanf.
- PR#4564: add note "stack is not executable" to object files generated by
ocamlopt (Linux/x86, Linux/AMD64).
- PR#4566: bug in Ratio.approx_ratio_fix and Num.approx_num_fix.
- PR#4582: clarified the documentation of functions in the String module.
- PR#4583: stack overflow in "ocamlopt -g" during closure conversion pass.
- PR#4585: ocamldoc and "val virtual" declarations.
- PR#4587: ocamldoc and escaped @ characters.
- PR#4605: Buffer.add_substitute was sometime wrong when target string had
backslashes.
- PR#4614: Inconsistent declaration of CamlCBCmd in LablTk library.
Objective Caml 3.10.2:
----------------------
Bug fixes:
- PR#1217 (partial) Typo in ocamldep man page
- PR#3952 (partial) ocamlopt: allocation problems on ARM
- PR#4339 (continued) ocamlopt: problems on HPPA
- PR#4455 str.mli not installed under Windows
- PR#4473 crash when accessing float array with polymorphic method
- PR#4480 runtime would not compile without gcc extensions
- PR#4481 wrong typing of exceptions with object arguments
- PR#4490 typo in error message
- Random crash on 32-bit when major_heap_increment >= 2^22
- Big performance bug in Weak hashtables
- Small bugs in the make-package-macosx script
- Bug in typing of polymorphic variants (reported on caml-list)
Objective Caml 3.10.1:
----------------------
Bug fixes:
- PR#3830 small bugs in docs
- PR#4053 compilers: improved compilation time for large variant types
- PR#4174 ocamlopt: fixed ocamlopt -nopervasives
- PR#4199 otherlibs: documented a small problem in Unix.utimes
- PR#4280 camlp4: parsing of identifier (^)
- PR#4281 camlp4: parsing of type constraint
- PR#4285 runtime: cannot compile under AIX
- PR#4286 ocamlbuild: cannot compile under AIX and SunOS
- PR#4288 compilers: including a functor application with side effects
- PR#4295 camlp4 toplevel: synchronization after an error
- PR#4300 ocamlopt: crash with backtrace and illegal array access
- PR#4302 camlp4: list comprehension parsing problem
- PR#4304 ocamlbuild: handle -I correctly
- PR#4305 stdlib: alignment of Arg.Symbol
- PR#4307 camlp4: assertion failure
- PR#4312 camlp4: accept "let _ : int = 1"
- PR#4313 ocamlbuild: -log and missing directories
- PR#4315 camlp4: constraints in classes
- PR#4316 compilers: crash with recursive modules and Lazy
- PR#4318 ocamldoc: installation problem with Cygwin (tentative fix)
- PR#4322 ocamlopt: stack overflow under Windows
- PR#4325 compilers: wrong error message for unused var
- PR#4326 otherlibs: marshal Big_int on win64
- PR#4327 ocamlbuild: make emacs look for .annot in _build directory
- PR#4328 camlp4: stack overflow with nil nodes
- PR#4331 camlp4: guards on fun expressions
- PR#4332 camlp4: parsing of negative 32/64 bit numbers
- PR#4336 compilers: unsafe recursive modules
- PR#4337 (note) camlp4: invalid character escapes
- PR#4339 ocamlopt: problems on HP-UX (tentative fix)
- PR#4340 camlp4: wrong pretty-printing of optional arguments
- PR#4348 ocamlopt: crash on Mac Intel
- PR#4349 camlp4: bug in private type definitions
- PR#4350 compilers: type errors with records and polymorphic variants
- PR#4352 compilers: terminal recursion under Windows (tentative fix)
- PR#4354 ocamlcp: mismatch with ocaml on polymorphic let
- PR#4358 ocamlopt: float constants wrong on ARM
- PR#4360 ocamldoc: string inside comment
- PR#4365 toplevel: wrong pretty-printing of polymorphic variants
- PR#4373 otherlibs: leaks in win32unix
- PR#4374 otherlibs: threads module not initialized
- PR#4375 configure: fails to build on bytecode-only architectures
- PR#4377 runtime: finalisation of infix pointers
- PR#4378 ocamlbuild: typo in plugin.ml
- PR#4379 ocamlbuild: problem with plugins under Windows
- PR#4382 compilers: typing of polymorphic record fields
- PR#4383 compilers: including module with private type
- PR#4385 stdlib: Int32/Int64.format are unsafe
- PR#4386 otherlibs: wrong signal numbers with Unix.sigprocmask etc.
- PR#4387 ocamlbuild: build directory not used properly
- PR#4392 ocamldep: optional argument of class
- PR#4394 otherlibs: infinite loops in Str
- PR#4397 otherlibs: wrong size for flag arrays in win32unix
- PR#4402 ocamldebug: doesn't work with -rectypes
- PR#4410 ocamlbuild: problem with plugin and -build
- PR#4411 otherlibs: crash with Unix.access under Windows
- PR#4412 stdlib: marshalling broken on 64 bit architectures
- PR#4413 ocamlopt: crash on AMD64 with out-of-bound access and reraise
- PR#4417 camlp4: pretty-printing of unary minus
- PR#4419 camlp4: problem with constraint in type class
- PR#4426 compilers: problem with optional labels
- PR#4427 camlp4: wrong pretty-printing of lists of functions
- PR#4433 ocamlopt: fails to build on MacOSX 10.5
- PR#4435 compilers: crash with objects
- PR#4439 fails to build on MacOSX 10.5
- PR#4441 crash when build on sparc64 linux
- PR#4442 stdlib: crash with weak pointers
- PR#4446 configure: fails to detect X11 on MacOSX 10.5
- PR#4448 runtime: huge page table on 64-bit architectures
- PR#4450 compilers: stack overflow with recursive modules
- PR#4470 compilers: type-checking of recursive modules too restrictive
- PR#4472 configure: autodetection of libX11.so on Fedora x86_64
- printf: removed (partially implemented) positional specifications
- polymorphic < and <= comparisons: some C compiler optimizations
were causing incorrect results when arguments are incomparable
New features:
- made configure script work on PlayStation 3
- ARM port: brought up-to-date for Debian 4.0 (Etch)
- many other small changes and bugfixes in camlp4, ocamlbuild, labltk,
emacs files
Objective Caml 3.10.0:
----------------------
(Changes that can break existing programs are marked with a "*" )
Language features:
- Added virtual instance variables in classes "val virtual v : t"
* Changed the behaviour of instance variable overriding; the new
definition replaces the old one, rather than creating a new
variable.
New tools:
- ocamlbuild: compilation manager for OCaml applications and libraries.
See draft documentation at http://gallium.inria.fr/~pouillar/
* Camlp4: heavily revised implementation, new API.
New ports:
- MacOS X PowerPC 64 bits.
- MS Windows 64 bits (x64) using the Microsoft PSDK toolchain.
- MS Windows 32 bits using the Visual Studio 2005 toolchain.
Compilers:
- Faster type-checking of functor applications.
- Referencing an interface compiled with -rectypes from a module
not compiled with -rectypes is now an error.
- Revised the "fragile matching" warning.
Native-code compiler:
- Print a stack backtrace on an uncaught exception.
(Compile and link with ocamlopt -g; execute with OCAMLRUNPARAM=b.)
Supported on Intel/AMD in 32 and 64 bits, PPC in 32 and 64 bits.
- Stack overflow detection on MS Windows 32 bits (courtesy O. Andrieu).
- Stack overflow detection on MacOS X PPC and Intel.
- Intel/AMD 64 bits: generate position-independent code by default.
- Fixed bug involving -for-pack and missing .cmx files (PR#4124).
- Fixed bug causing duplication of literals (PR#4152).
Run-time system:
- C/Caml interface functions take "char const *" arguments
instead of "char *" when appropriate.
- Faster string comparisons (fast case if strings are ==).
Standard library:
- Refined typing of format strings (type format6).
- Printf, Format: new function ifprintf that consumes its arguments
and prints nothing (useful to print conditionally).
- Scanf:
new function format_from_string to convert a string to a format string;
new %r conversion to accomodate user defined scanners.
- Filename: improved Win32 implementation of Filename.quote.
- List: List.nth now tail-recursive.
- Sys: added Sys.is_directory. Some functions (e.g. Sys.command) that
could incorrectly raise Sys_io_blocked now raise Sys_error as intended.
- String and Char: the function ``escaped'' now escapes all the characters
especially handled by the compiler's lexer (PR#4220).
Other libraries:
- Bigarray: mmap_file takes an optional argument specifying
the start position of the data in the mapped file.
- Dynlink: now defines only two modules, Dynlink and Dynlinkaux (internal),
reducing risks of name conflicts with user modules.
- Labltk under Win32: now uses Tcl/Tk 8.4 instead of 8.3 by default.
- VM threads: improved performance of I/O operations (less polling).
- Unix: new function Unix.isatty.
- Unix emulation under Win32:
fixed incorrect error reporting in several functions (PR#4097);
better handling of channels opened on sockets (PR#4098);
fixed GC bug in Unix.system (PR#4112).
Documentation generator (OCamldoc):
- correctly handle '?' in value names (PR#4215)
- new option -hide-warnings not to print ocamldoc warnings
Lexer generator (ocamllex): improved error reporting.
License: fixed a typo in the "special exception" to the LGPL.