From : Damien Doligez <damien.doligez AT inria.fr>

: Damien Doligez <damien.doligez AT inria.fr> To : caml users <caml-list AT inria.fr>, caml announce <caml-announce AT inria.fr>

: caml users <caml-list AT inria.fr>, caml announce <caml-announce AT inria.fr> Subject : [Caml-list] OCaml 4.05.0 released

: [Caml-list] OCaml 4.05.0 released Date: Thu, 13 Jul 2017 11:53:37 +0200

[Caml-list] OCaml 4.05.0 released , Damien Doligez, 07/13/2017 Re: [Caml-list] OCaml 4.05.0 released , Gabriel Scherer, 07/19/2017

, Damien Doligez, 07/13/2017

Dear OCaml users,We have the pleasure of celebrating the birthdays of Simone Veil and ErnöRubikby announcing the release of OCaml version 4.05.0.It is available as an OPAM switch, or as a sourcedownload here: < https://caml.inria.fr/pub/distrib/ocaml-4.05/ Happy hacking,-- Damien Doligez for the OCaml team.OCaml 4.05.0 (13 Jul 2017):---------------------------(Changes that can break existing programs are marked with a "*")### Language features:### Code generation and optimizations:- MPR#7201, GPR#954: Correct wrong optimisation of "0 / "and "0 mod " in the case when was a non-constantevaluating to zero(Mark Shinwell, review by Gabriel Scherer, Leo White and Xavier Leroy)- MPR#7357, GPR#832: Improve compilation time for toplevelinclude(struct ... end : sig ... end)(Alain Frisch, report by Hongbo Zhang, review by Jacques Garrigue)- MPR#7533, GPR#1173: Correctly perform side effects for certaincases of "/" and "mod"(Mark Shinwell, report by Jan Mitgaard)- GPR#504: Instrumentation support for fuzzing with afl-fuzz.(Stephen Dolan, review by Alain Frisch, Pierre Chambart, MarkShinwell, Gabriel Scherer and Damien Doligez)- GPR#863, GPR#1068, GPR#1069: Optimise matches with constantresults to lookup tables.(Stephen Dolan, review by Gabriel Scherer, Pierre Chambart,Mark Shinwell, and bug report by Gabriel Scherer)- GPR#1150: Fix typo in arm64 assembler directives(KC Sivaramakrishnan)### Runtime system:- MPR#385, GPR#953: Add caml_startup_exn(Mark Shinwell)- MPR#7423, GPR#946: expose new exception-raising functions`void caml_{failwith,invalid_argument}_value(value msg)`in addition to`void caml_{failwith,invalid_argument}(char const *msg)`.The previous functions would not free their message argument, sowere inconvient for dynamically-allocated messages; the messagespassed to the new functions are handled by the garbage collector.(Gabriel Scherer, review by Mark Shinwell, request by Immanuel Litzroth)- MPR#7557, GPR#1213: More security for getenv(Damien Doligez, reports by Seth Arnold and Eric Milliken, review byXavier Leroy, David Allsopp, Stephen Dolan, Hannes Mehnert)- GPR#795: remove 256-character limitation on Sys.executable_name(Xavier Leroy)- GPR#891: Use -fno-builtin-memcmp when building runtime with gcc.(Leo White)### Type system:- MPR#6608, GPR#901: unify record types when overriding all fields(Tadeu Zagallo and Gabriel Scherer, report by Jeremy Yallop,review by David Allsopp, Jacques Garrigue)* MPR#7414, GPR#929: Soundness bug with non-generalized type variables andfunctors.(Jacques Garrigue, report by Leo White)### Compiler user-interface and warnings:- MPR#7050, GPR#748 GPR#843 GPR#864: new `-args/-args0 ` parameters toprovide extra command-line arguments in a file -- see documentation.User programs may implement similar options using the new `Expand`constructor of the `Arg` module.(Bernhard Schommer, review by Jérémie Dimino, Gabriel Schererand Damien Doligez, discussion with Alain Frisch and Xavier Leroy,feature request from the Coq team)- MPR#7137, GPR#960: "-open" command line flag now acceptsa module path (not a module name)(Arseniy Alekseyev and Leo White)- MPR#7172, GPR#970: add extra (ocamlc -config) optionsint_size, word_size, ext_exe(Gabriel Scherer, request by Daniel Bünzli)- MPR#7315, GPR#736: refine some error locations(Gabriel Scherer and Alain Frisch, report by Matej Košík)- MPR#7473, GPR#1025: perform proper globbing for command-line arguments onWindows(Jonathan Protzenko)- MPR#7479: make sure "ocamlc -pack" is only given .cmo and .cmi files,and that "ocamlopt -pack" is only given .cmx and .cmi files.(Xavier Leroy)- GPR#796: allow compiler plugins to declare their own arguments.(Fabrice Le Fessant)- GPR#829: better error when opening a module aliased to a functor(Alain Frisch)- GPR#911: ocamlc/ocamlopt do not pass warnings-related options to Ccompiler when called to compile third-party C source files(Sébastien Hinderer, review by Adrien Nader and David Allsopp)- GPR#915: fix -dsource (pprintast.ml) bugs(Runhang Li, review by Alain Frisch)* GPR#933: ocamlopt -p now reports an error on platforms that do notsupport profiling with gprof; dummy profiling libraries are no longerinstalled on such platforms.This can be tested with ocamlopt -config(Sébastien Hinderer)- GPR#1009: "ocamlc -c -linkall" and "ocamlopt -c -linkall" can now be usedto set the "always link" flag on individual compilation units. Thiscontrols linking with finer granularity than "-a -linkall", which setsthe "always link" flag on all units of the given library.(Xavier Leroy)- GPR#1015: add option "-plugin PLUGIN" to ocamldep too. Use compilerlibsto build ocamldep.(Fabrice Le Fessant)- GPR#1027: various improvements to -dtimings, mostly including timespent in subprocesses like preprocessors(Valentin Gatien-Baron, review by Gabriel Scherer)- GPR#1098: the compiler now takes the boolean "OCAML_COLOR" environmentvariable into account if "-color" is not provided. This allows usersto override the default behaviour without modifying invocations of ocamlmanually.(Hannes Mehnert, Guillaume Bury,review by Daniel Bünzli, Gabriel Scherer, Damien Doligez)### Standard library:- MPR#6975, GPR#902: Truncate function added to stdlib Buffer module(Dhruv Makwana, review by Alain Frisch and Gabriel Scherer)- MPR#7279, GPR#710: `Weak.get_copy` `Ephemeron.*_copy` doesn't copycustom blocks anymore(François Bobot, Alain Frisch, bug reported by Martin R. Neuhäußer,review by Thomas Braibant and Damien Doligez)* MPR#7500, GPR#1081: Remove Uchar.dump(Daniel Bünzli)- GPR#760: Add a functions List.compare_lengths andList.compare_length_with to avoid full list length computations(Fabrice Le Fessant, review by Leo White, Josh Berdine and Gabriel Scherer)- GPR#778: Arg: added option Expand that allows to expand a stringargument to a string array of new arguments(Bernhard Schommer, review by Gabriel Scherer and Jérémie Dimino)- GPR#849: Expose a Spacetime.enabled value(Leo White)- GPR#885: Option-returning variants of stdlib functions(Alain Frisch, review by David Allsopp and Bart Jacobs)- GPR#869: Add find_first, find_first_opt, find_last, find_last_opt tomaps and sets. Find the first or last binding or elementsatisfying a monotonic predicate.(Gabriel de Perthuis, with contributions from Alain Frisch, review byHezekiah M. Carty and Simon Cruanes, initial report by Gerd Stolpmann)- GPR#875: Add missing functions to ArrayLabels, BytesLabels,ListLabels, MoreLabels, StringLabels so they are compatible withnon-labeled counterparts. Also add missing @@ocaml.deprecated attributesin StringLabels and BytesLabels.(Roma Sokolov, review by Gabriel Scherer, Jacques Garrigue,Gabriel Radanne, Alain Frisch)- GPR#999: Arg, do not repeat the usage message thrice when reporting an error(this was a regression in 4.03)(Florian Angeletti, review by Gabriel Scherer)- GPR#1042: Fix escaping of command-line arguments inUnix.create_process{,_env} under Windows. Arguments with tabs should nowbe received verbatim by the child process.(Nicolas Ojeda Bar, Andreas Hauptmann review by Xavier Leroy)### Debugging and profiling:- MPR#7258: ocamldebug's "install_printer" command had problems withmodule aliases(Xavier Leroy)- GPR#378: Add [Printexc.raise_with_backtrace] to raise an exception usingan explicit backtrace(François Bobot, review by Gabriel Scherer, Xavier Leroy, Damien Doligez,Frédéric Bour)### Manual and documentation:- MPR#6597, GPR#1030: add forward references to language extensionsthat extend non-terminal symbols in the language reference section.(Florian Angeletti, review by Gabriel Scherer)- MPR#7497, GPR#1095: manual, enable numbering for table of contents(Florian Angeletti, request by Daniel Bünzli)- MPR#7539, GPR#1181: manual, update dead links in ocamldoc chapter(Florian Angeletti)- GPR#633: manpage and manual documentation for the `-opaque` option(Konstantin Romanov, Gabriel Scherer, review by Mark Shinwell)- GPR#751, GPR#925: add a HACKING.adoc file to contain varioustips and tricks for people hacking on the repository. See alsoCONTRIBUTING.md for advice on sending contributions upstream.(Gabriel Scherer and Gabriel Radanne, review by David Allsopp,inspired by John Whitington)- GPR#916: new tool lintapidiff, use it to update the manual with@since annotations for API changes introduced between 4.00-4.05.(Edwin Török, review by Gabriel Scherer, discussion with Alain Frisch,David Allsopp, Sébastien Hinderer, Damien Doligez and Xavier Leroy)- GPR#939: activate the caml_example environment in the languageextensions section of the manual. Convert some existing codeexamples to this format.(Florian Angeletti)- GPR#1082: clarify that the use of quoted string for preprocessedforeign quotations still requires the use of an extension node[%foo ...] to mark non-standard interpretation.(Gabriel Scherer, request by Matthew Wahab in GPR#1066,review by Florian Angeletti)### Other libraries:- MPR#7158: Event.sync, Mutex.create, Condition.create cause too many GCs.The fix is to no longer consider mutexes and condition variablesas rare kernel resources.(Xavier Leroy)- MPR#7264: document the different behaviors of Unix.lockf under POSIXand under Win32.(Xavier Leroy, report by David Allsopp)- MPR#7339, GPR#787: Support the '0 dimension' case for bigarrays(see Bigarray documentation)(Laurent Mazare,review by Gabriel Scherer, Alain Frisch and Hezekiah M. Carty)* MPR#7342, GPR#797: fix Unix.read on pipes with no data left on Windowsit previously raised an EPIPE error, it now returns 0 like other OSes(Jonathan Protzenko, review by Andreas Hauptmann and Damien Doligez)- GPR#650: in the Unix library, add `?cloexec:bool` optional arguments tofunctions that create file descriptors (`dup`, `dup2`, `pipe`, `socket`,`socketpair`, `accept`). Implement these optional arguments in themost atomic manner provided by the operating system to set (or clear)the close-on-exec flag at the same time the file descriptor is created,reducing the risk of race conditions with `exec` or `create_process`calls running in other threads, and improving security. Also: add a`O_KEEPEXEC` flag for `openfile` by symmetry with `O_CLOEXEC`.(Xavier Leroy, review by Mark Shinwell, David Allsopp and Alain Frisch,request by Romain Beauxis)- GPR#996: correctly update caml_top_of_stack in systhreads(Fabrice Le Fessant)### Toplevel:- MPR#7060, GPR#1035: Print exceptions in installed custom printers(Tadeu Zagallo, review by David Allsopp)### Tools:- MPR#5163: ocamlobjinfo, dump globals defined by bytecode executables(Stéphane Glondu)- MPR#7333: ocamldoc, use the first sentence of text file asa short description in overviews.(Florian Angeletti)- GPR#848: ocamldoc, escape link targets in HTML output(Etienne Millon, review by Gabriel Scherer, Florian Angeletti andDaniel Bünzli)- GPR#986: ocamldoc, use relative paths in error messageto solve ocamlbuild+doc usability issue (ocaml/ocamlbuild#79)(Gabriel Scherer, review by Florian Angeletti, discussion with DanielBünzli)- GPR#1017: ocamldoc, add an option to detect code fragments that could betransformed into a cross-reference to a known element.(Florian Angeletti, review and suggestion by David Allsopp)- clarify ocamldoc text parsing error messages(Gabriel Scherer)### Compiler distribution build system:- MPR#7377: remove -std=gnu99 for newer gcc versions(Damien Doligez, report by ygrek)- MPR#7452, GPR#1228: tweak GCC options to try to avoid theSkylake/Kaby lake bug(Damien Doligez, review by David Allsopp, Xavier Leroy and Mark Shinwell)- GPR#693: fail on unexpected errors or warnings within caml_exampleenvironment.(Florian Angeletti)- GPR#803: new ocamllex-based tool to extract bytecode compileropcode information from C headers.(Nicolas Ojeda Bar)- GPR#827: install missing mli and cmti files, new make targetinstall-compiler-sources for installation of compiler-libs ml files(Hendrik Tews)- GPR#887: allow -with-frame-pointers if clang is used as compiler on Linux(Bernhard Schommer)- GPR#898: fix locale-dependence of primitive list order,detected through reproducible-builds.org.(Hannes Mehnert, review by Gabriel Scherer and Ximin Luo)- GPR#907: Remove unused variable from the build system(Sébastien Hinderer, review by whitequark, Gabriel Scherer, Adrien Nader)- GPR#911: Clarify the use of C compiler related variables in the buildsystem.(Sébastien Hinderer, review by Adrien Nader, Alain Frisch, David Allsopp)- GPR#919: use clang as preprocessor assembler if clang is used as compiler(Bernhard Schommer)- GPR#927: improve the detection of hashbang support in the configure script(Armaël Guéneau)- GPR#932: install ocaml{c,lex}->ocaml{c,lex}.byte symlink correctlywhen the opt target is built but opt.opt target is not.(whitequark, review by Gabriel Scherer)- GPR#935: allow build in Android's termux(ygrek, review by Gabriel Scherer)- GPR#984: Fix compilation of compiler distribution when Spacetimeenabled(Mark Shinwell)- GPR#991: On Windows, fix installation when native compiler is notbuilt(Sébastien Hinderer, review by David Allsopp)- GPR#1033: merge Unix and Windows build systems in the root directory(Sébastien Hinderer, review by Damien Doligez and Adrien Nader)- GPR#1047: Make .depend files generated for C sources more portable(Sébastien Hinderer, review by Xavier Leroy and David Allsopp)- GPR#1076: Simplify ocamlyacc's build system(Sébastien Hinderer, review by David Allsopp)### Compiler distribution build system: Makefile factorizationThe compiler distribution build system (the set of Makefiles used tobuild the compiler distribution) traditionally had separate Makefilesfor Unix and Windows, which lead to some amount of duplication andsubtle differences and technical debt in general -- for people workingon the compiler distribution, but also cross-compilation or porting tonew systems. During the 4.05 development period, Sébastien Hindererworked on harmonizing the build rules and merging the two buildsystems.* Some changes were made to the config/Makefile file whichis exported as $(ocamlc -where)/Makefile.config, and onwhich some advanced users might rely. The changes areas follows:- a BYTERUN variable was added that points to the installed ocamlrun- the PARTIALLD variable was removed (PACKLD is more complete)- the always-empty DLLCCCOMPOPTS was removed- the SHARED variable was removed; its value is "shared" or "noshared",which duplicates the existing and more convenientSUPPORTS_SHARED_LIBRARIES variable whose value is "true" or "false".Note that Makefile.config may change further in the future and relyingon it is a bit fragile. We plan to make `ocamlc -config` easier to usefor scripting purposes, and have a stable interface there. If you relyon Makefile.config, you may want to get in touch with Sébastien Hindereror participate to MPR#7116 (Allow easy retrieval of Makefile.config'svalues)or MPR#7172 (More information in ocamlc -config).The complete list of changes is listed below.- GPR#705: update Makefile.nt so that ocamlnat compilesfor non-Cygwin Windows ports.(Sébastien Hinderer, review by Alain Frisch)- GPR#729: Make sure ocamlnat is built with a $(EXE) extension, mergerules between Unix and Windows Makefiles(Sébastien Hinderer, review by Alain Frisch)- GPR#762: Merge build systems in the yacc/ directory.(Sébastien Hinderer, review by David Allsopp, Alain Frisch)- GPR#764: Merge build systems in the debugger/ directory.(Sébastien Hinderer, review by Alain Frisch)- GPR#785: Merge build systems in otherlibs/systhreads/(Sébastien Hinderer, review by Alain Frisch, David Allsopp,testing and regression fix by Jérémie Dimino)- GPR#788: Merge build systems in subdirectories of otherlibs/.(Sébastien Hinderer, review by Alain Frisch)- GPR#808, GPR#906: Merge Unix and Windows build systemsin the ocamldoc/ directory(Sébastien Hinderer, review by Alain Frisch)- GPR#812: Merge build systems in the tools/ subdirectory(Sébastien Hinderer, review by Alain Frisch)- GPR#866: Merge build systems in the stdlib/ directory(Sébastien Hinderer, review by David Allsopp and Adrien Nader)- GPR#941: Merge Unix and Windows build systems in the asmrun/ directory(Sébastien Hinderer, review by Mark Shinwell, Adrien Nader,Xavier Leroy, David Allsopp, Damien Doligez)- GPR#981: Merge build systems in the byterun/ directory(Sébastien Hinderer, review by Adrien Nader)- GPR#1033, GPR#1048: Merge build systems in the root directory(Sébastien Hinderer, review by Adrien Nader and Damien Doligez,testing and regression fix by Andreas Hauptmann)### Internal/compiler-libs changes:- GPR#673: distinguish initialization of block fields from mutation in lambda.(Frédéric Bour, review by Xavier Leroy, Stephen Dolan and Mark Shinwell)- GPR#744, GPR#781: fix duplicate self-reference in imported cmi_crcslist in .cmti files + avoid rebuilding cmi_info record when creating.cmti files(Alain Frisch, report by Daniel Bünzli, review by Jérémie Dimino)- GPR#881: change `Outcometree.out_variant` to be more general.`Ovar_name of out_ident * out_type list` becomes `Ovar_type of out_type`.(Valentin Gatien-Baron, review by Leo White)- GPR#908: refactor PIC-handling in the s390x backend(Gabriel Scherer, review by Xavier Leroy and Mark Shinwell)### Bug fixes- MPR#5115: protect all byterun/fail.c functions againstuninitialized caml_global_data (only changes the bytecode behavior)(Gabriel Scherer, review by Xavier Leroy)- MPR#6136, GPR#967: Fix Closure so that overapplication evaluation ordermatches the bytecode compiler and Flambda.(Mark Shinwell, report by Jeremy Yallop, review by Frédéric Bour)- MPR#6550, GPR#1094: Allow creation of empty .cmxa files on macOS(Mark Shinwell)- MPR#6594, GPR#955: Remove "Istore_symbol" specific operation on x86-64.This is more robust and in particular avoids assembly failures on Win64.(Mark Shinwell, review by Xavier Leroy, testing by David Allsopp andOlivier Andrieu)- MPR#6903: Unix.execvpe doesn't change environment on Cygwin(Xavier Leroy, report by Adrien Nader)- MPR#6987: Strange error message probably caused byuniversal variable escape (with polymorphic variants)(Jacques Garrigue, report by Mikhail Mandrykin and Leo White)- MPR#7216, GPR#949: don't require double parens in Functor((val x))(Jacques Garrigue, review by Valentin Gatien-Baron)- MPR#7331: ocamldoc, avoid infinite loop in presence of self alias,i.e. module rec M:sig end = M(Florian Angeletti, review Gabriel Scherer)- MPR#7346, GPR#966: Fix evaluation order problem whereby expressions couldbe incorrectly re-ordered when compiling with Flambda. This also fixes oneexample of evaluation order in the native code compiler not matching thebytecode compiler (even when not using Flambda)(Mark Shinwell, Leo White, code review by Pierre Chambart)- MPR#7348: Private row variables can escape their scope(Jacques Garrigue, report by Leo White)- MPR#7407: Two not-quite-standard C idioms rejected by SUNWSPro compilers(Xavier Leroy)- MPR#7421: Soundness bug with GADTs and lazy(Jacques Garrigue, report by Leo White)- MPR#7424: Typechecker diverges on unboxed type declaration(Jacques Garrigue, report by Stephen Dolan)- MPR#7426, GPR#965: Fix fatal error during object compilation (alsointroduces new [Pfield_computed] and [Psetfield_computed] primitives)(Mark Shinwell, report by Ulrich Singer)- MPR#7427, GPR#959: Don't delete let bodies in Cmmgen(Mark Shinwell, report by Valentin Gatien-Baron)- MPR#7432: Linking modules compiled with -labels and -nolabels is not safe(Jacques Garrigue, report by Jeremy Yallop)- MPR#7437: typing assert failure with nonrec priv(Jacques Garrigue, report by Anil Madhavapeddy)- MPR#7438: warning +34 exposes #row with private types(Alain Frisch, report by Anil Madhavapeddy)- MPR#7443, GPR#990: spurious unused open warning with local open in patterns(Florian Angeletti, report by Gabriel Scherer)- MPR#7504: fix warning 8 with unconstrained records(Florian Angeletti, report by John Whitington)- MPR#7456, GPR#1092: fix slow compilation on source files containing a lotof similar debugging information location entries(Mark Shinwell)- GPR#795: remove 256-character limitation on Sys.executable_name(Xavier Leroy)- GPR#805, GPR#815, GPR#833: check for integer overflow in String.concat(Jeremy Yallop,review by Damien Doligez, Alain Frisch, Daniel Bünzli, Fabrice Le Fessant)- GPR#881: short-paths did not apply to some polymorphic variants(Valentin Gatien-Baron, review by Leo White)- GPR#886: Fix Ctype.moregeneral's handling of row_name(Leo White, review by Jacques Garrigue)- GPR#934: check for integer overflow in Bytes.extend(Jeremy Yallop, review by Gabriel Scherer)- GPR#956: Keep possibly-effectful expressions when optimizing multiplicationby zero.(Jeremy Yallop, review by Nicolás Ojeda Bär, Xavier Leroy and Mark Shinwell)- GPR#977: Catch Out_of_range in ocamldebug's "list" command(Yunxing Dai)- GPR#983: Avoid removing effectful expressions in Closure, andeliminate more non-effectful ones(Alain Frisch, review by Mark Shinwell and Gabriel Scherer)- GPR#987: alloc_sockaddr: don't assume a null terminator. It is not insertedon macOS by system calls that fill in a struct sockaddr (e.g. getsockname).(Anton Bachin)- GPR#998: Do not delete unused closures in un_anf.ml.(Leo White, review by Mark Shinwell and Pierre Chambart)- GPR#1019: Fix fatal error in Flambda mode "[functions] does not map set ofclosures ID"(Pierre Chambart, code review by Mark Shinwell and Leo White)- GPR#1075: Ensure that zero-sized float arrays have zero tags.(Mark Shinwell, Leo White, review by Xavier Leroy)* GPR#1088: Gc.minor_words now returns accurate numbers.(Stephen Dolan, review by Pierre Chambart and Xavier Leroy)