Annotation of rpl/ChangeLog, revision 1.84

1.80      bertrand    1: * Tue Aug 9 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.3 (RPL/2)
1.84    ! bertrand    2: - libsigsegv is added;
        !             3: - OpenMotif is added;
        !             4: - all internal signal handlers are rewritten to avoid POSIX signal usage
        !             5: and to be async signal safe;
1.83      bertrand    6: - SIGSEGV signal handler is rewritten;
1.80      bertrand    7: - SREV intrinsic is added.
1.79      bertrand    8: * Tue Aug 9 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.2 (RPL/2)
1.81      bertrand    9: - I have fixed a lot of bugs in gpp preprocessor (and sent gpp 3.0 to official
1.78      bertrand   10: gpp developer). Now, macros like
                     11: 
                     12:    #define foo foo bar
                     13: 
                     14: is evaluated without recursion. gpp 2.24 crashed on stack overflow.
1.77      bertrand   15: - LIMIT is added;
1.76      bertrand   16: - Now, undefined values like 'infinity/infinity' are computed. Result is
                     17: undef constant;
1.75      bertrand   18: - infinity constant is added.
1.73      bertrand   19: * Sun Jul 24 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.1 (RPL/2)
1.74      bertrand   20: - VERSION now returns OS type, architecture and ABI;
1.73      bertrand   21: - configure script is updated. New flags :
                     22:     --with-32bits-abi
                     23:    --with-64bits-abi
                     24:    --with-rplcas
                     25: Please not that RPL/CAS is not built by default;
1.72      bertrand   26: - Lapack is upgraded to 3.3.1.
1.71      bertrand   27: * Mon Jun 27 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0 (RPL/2)
                     28: - New stable release.
1.70      bertrand   29: * Fri Jun 22 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.4 (RPL/2)
1.71      bertrand   30: - some minor changes have been done in instruction_int() to accept new argument
                     31: types;
                     32: - interface_cas.cpp now catchs exceptions returned by giac.
1.70      bertrand   33: * Fri Jun 24 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.3 (RPL/2)
                     34: - INT intrinsic now uses RPLCAS to compute symbolic integration;
1.69      bertrand   35: - minor bug is fixed in INTRINSIC function. Now, this function gives same
                     36: result with ou without -p switch.
1.68      bertrand   37: * Wed Jun 22 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.2 (RPL/2)
1.67      bertrand   38: - memory caching is added to new variable tree.
1.66      bertrand   39: * Tue Jun 21 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.1 (RPL/2)
                     40: - SPAWN is now usable with new variable management;
1.65      bertrand   41: - MEM is rewritten;
                     42: - PRUSR is rewritten;
                     43: - merge 4_0 branch into HEAD;
                     44: - CLUSR is rewritten;
                     45: - -p flag is now usable;
                     46: - New benchmark:
                     47: cauchy:[~/rpl/bench] > ./bench.rpl 
                     48: +++RPL/2 (R) version 4.1.0.prerelease.1 (lundi 20/06/2011, 23:00:45 CEST)
                     49: +++Copyright (C) 1989 ŗ 2010, 2011 BERTRAND JoŽl
                     50: Number of scalar operations per second and per core : 2625369.22710792
1.64      bertrand   51: * Mon Jun 20 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.0 (RPL/2)
                     52: - New variable management is written. Please note that -p flag does not work
                     53: and all multithread/multitask capabilities have been disabled until this
                     54: new subsystem shall be validated.
                     55: * Thu May 09 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.23 (RPL/2)
                     56: - major bug is fixed in STD format (1E7 sq prints 1);
                     57: - major bug is fixed in READ intrinsic (socket). This bug was introduced
                     58: by a new feature in glibc.
                     59: * Thu Apr 14 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.22 (RPL/2)
                     60: - by default, RPL/2 uses "NONE" IMPLICIT when it's started in batch mode and
                     61: "ALL" IMPLICIT when it runs in interactive mode;
                     62: - when "NONE" IMPLICIT is set, STO intrinsic raises an error when it is used
                     63: to create or modify a global variable. Now, with "NONE" IMPLICIT, you have
                     64: to use SAVE to manipulate global variables;
                     65: - replace erroneous TAB by TBL in evaluation() and formateur_fichier()
                     66: subroutines;
                     67: - fix major memory access violation in evaluation subroutine. Only occurs
                     68: when 'X(i,j)' is evaluated on a matrix and when (i,j) points out of bounds;
                     69: - fix major bug in evaluation subroutine. 'X(i)' returns execution error
                     70: when X was a vector or a table.
1.63      bertrand   71: * Sun Apr 04 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.21 (RPL/2)
                     72: - Gnuplot is upgraded;
1.62      bertrand   73: - flag 34 is now used to enable or disable control character evaluation;
                     74: - major bug is fixed in P->R intrinsic function when argument type is
                     75: complex and degree mode is set;
                     76: - L->T and T->L are added;
1.63      bertrand   77: - OLD filetype is fixed;
1.61      bertrand   78: - FLOW socket support is added;
                     79: - FLOW sequential files are added;
                     80: - new escape sequence is added to handle flow files (\x + hexadecimal code).
                     81: Known escape sequences are \", \b, \n, \t, \x?? and \\.
1.60      bertrand   82: * Sun Mar 06 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.20 (RPL/2)
                     83: - Ncurses is upgraded to 5.8;
                     84: - ALARM is fixed by filling isdst field;
                     85: - catch ECONNRESET in write intrinsic to return an execution error instead of
                     86: system one;
                     87: - fix a typo in HELP intrinsic;
                     88: - Openssl is upgraded to 1.0.0d, sqlite to 3.7.5 and readline to 6.2;
1.57      bertrand   89: - Lapack is upgraded to 3.3.0;
1.58      bertrand   90: - libmtmalloc is now default Solaris allocator;
1.56      bertrand   91: - ncurses is upgraded;
1.60      bertrand   92: - regression introduced by 4.0.19 is fixed in signal management.
1.59      bertrand   93: Interruption1() could be called from itself and raises bus error (on sparc) or
1.55      bertrand   94: segmentation fault;
                     95: - sqlite is upgraded to 3.7.4;
1.54      bertrand   96: - OpenSSL is upgraded to 1.0.0c;
                     97: - syntax error is correctly checked ( (2+,0) does not crash RPL/2 anymore);
                     98: - characters are tested in recherche_type() to avoid names like '12+';
1.53      bertrand   99: - gnuplot is upgraded to 4.4.2 due to major bugs.
1.52      bertrand  100: * Thu Sep 23 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.19 (RPL/2)
                    101: - due to a very strange bug I've only seen on Solaris, ptmalloc3 is removed.
                    102: Solaris libresolv randomly uses ptmalloc3 and system allocator and makes heap
                    103: corruption. As internal memory management have been improved, a best fit
                    104: allocator like ptmalloc3 is not required anymore;
1.50      bertrand  105: - gnuplot is upgraded to 4.4.1;
                    106: - deadlock is fixed in signal handlers: same mutex was used in standard
                    107: subroutines (without protected sections by sigprocmask() or pthread_sigmask())
                    108: and signal handlers. A new signal handler specific mutex is added;
                    109: - minor bug is fixed in evaluation() subroutine. In { X 0 PI }, PI is a function
                    110: that has to be evaluated by ->NUM;
1.49      bertrand  111: - rplfile build process is modify to be sure that rplfile is not modified
                    112: after rpl build stage (to be sure that rplfile checksum is not modified after
                    113: rpl compilation);
1.51      bertrand  114: - AWK is replaced by rplawk. rplawk is original awk written by Brian Kernighan,
                    115: modified to remove yacc code and renamed;
1.47      bertrand  116: - some workarounds have been written to not use buggy klibc SystemV IPCS.
                    117: ABORT now works on eComStation;
                    118: - sqlite is upgraded to 3.7.2;
                    119: - bug is fixed in software interrupts. When both process have different PID,
                    120: parent process was not interrupted if it is not group master process. To fix
                    121: this bug, SIGINJECT signal is not sent by child process but by control thread
                    122: in parent process;
1.46      bertrand  123: - minor bug is fixed in data injection (POKE) that does not work as expected
                    124: when child process is protected by NRPROC.
1.44      bertrand  125: * Thu Aug 26 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.18 (RPL/2)
1.43      bertrand  126: - --enable-sysv-sems is added to configure script to use SystemV semaphores
                    127: functions instead of POSIX functions. This function is disabled or forced on
                    128: systems that does not provide correct POSIX or SysV semaphores subsystem;
                    129: - a dirty but not quick patch is written to workaround broken siginfo
                    130: structures. This patch has been successfully tested. It uses a segment of
1.50      bertrand  131: shared memory (Posix or SysV) and some semaphores (Posix or SysV) by process
1.43      bertrand  132: (Unix PID);
1.41      bertrand  133: - some OpenBSD's hacks are added;
                    134: - broken siginfo->si_pid field is now checked by configure script;
1.40      bertrand  135: - SWI now sends SIGCONT to interrupted process to start interrupt without delay;
                    136: - random generator is cloned by SPAWN;
                    137: - in transliteration subroutine : '\r' is added after all '\n' in OS/2 port;
1.39      bertrand  138: - getaddrinfo is hardcoded when host system does not provide getaddrinfo
1.40      bertrand  139: or freeaddrinfo;
1.39      bertrand  140: - RPL/2 can now use SystemV semaphores when POSIX semaphores are unavailable;
                    141: - major bug is fixed in CHR intrinsic when obtained character is not printable;
                    142: - Lapack is upgraded to 3.2.2;
1.37      bertrand  143: - OS/2 (eComStation 2.0 with EMX 0.9d) support is added;
1.36      bertrand  144: - TOKENIZE is now able to convert escape sequences;
                    145: - ATPOKE and CLRATPOKE new intrinsics are added;
                    146: - --enable-full-static configure flag is added. With this flag, mysql and
                    147: postgresql libraries are statically linked in rpl executable;
                    148: - units Makefile is modified to avoid readline and ncurses usages;
1.37      bertrand  149: - sqlite is upgraded to 3.7.0.1;
1.36      bertrand  150: - units is upgraded to 1.88;
                    151: - another major bug is fixed in the same variable creation subroutine.
                    152: Level 0 and 1 variables adresses were swapped when a global variable masked
                    153: a name of RPL/2 routine;
1.35      bertrand  154: - major bug is fixed in global variable creation subroutine. When a global
                    155: variable was created and when a local variable existed with the same name,
                    156: computed address of global variable was wrong;
                    157: - src/Makefile.am is modified to avoid a bug on several systems. libptmalloc3
                    158: is forced in front of all libraries.
1.34      bertrand  159: * Tue Jul 13 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.17 (RPL/2)
                    160: - BACKTRACE intrinsic is added;
                    161: - major bug is fixed in SELECT/DEFAULT/END conditional structure. Only occurs
                    162: when this structure is included in IFERR/THEN/END structure and when an error is
                    163: caught;
                    164: - major bug is fixed in analyse() subroutine. When evaluation() returned error
                    165: in a compiled program, analyse() caught this error twice and randomly aborted
                    166: with a segmentation error;
                    167: - TRIM and TOKENIZE replace both '\n' and '\t' by regular spaces;
                    168: - ATEXIT subroutine begins with an implicit CSTOP to avoid multiple stop
                    169: signals;
                    170: - memory leak is fixed in ROW+. It only occurs when a row is added to an empty
                    171: matrix.
1.33      bertrand  172: * Thu Jun 24 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.16 (RPL/2)
                    173: - minor bug is fixed in evaluation() subroutine. With this patch, same program
                    174: returns same result with or without -p flag;
                    175: - ncurses 5.7 is upgraded to 20100619;
                    176: - openssl is upgraded to 1.0.0a;
1.32      bertrand  177: - interrupt stacks are now FIFO instead of LIFO;
                    178: - debug memory allocation subroutines are improved to run in multithreaded
                    179: programs;
                    180: - some memory leaks are fixed in process management (SPAWN and DETACH);
                    181: - version verification is added to shared objects;
                    182: - -D_GNU_SOURCE is added to ptmalloc3 makefile to avoid a major bug on 64 bits
                    183: linux (false mremap() prototype);
                    184: - major bug is fixed in rpliconv. getc() returns an int, not a unsigned char.
1.30      bertrand  185: * Sun May 23 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.15 (RPL/2)
1.29      bertrand  186: - all '-' are replaced by '_' in random generator list;
1.28      bertrand  187: - minor memory leak is fixed in OPEN intrinsic (socket);
                    188: - major bug is fixed in IFERR structure. Only occurs in compiled program;
                    189: - major bug is fixed in copie_objet() and liberation(). Only concerns
                    190: format in FCH (file descriptor) and SCK (socket descriptor);
                    191: - debug routines are improved;
                    192: - PROCID is added;
                    193: - MEMLOCK and MEMUNLOCK are added. MEMLOCK forces a process to remain in memory
                    194: and to not use swap;
1.26      bertrand  195: - major bug is fixed in sql support. SQL connections were closed in all chield
                    196: process;
                    197: - standard allocator (malloc()/free()) is replaced by ptmalloc3 due to some bugs
                    198: discovered in Solaris thread safe allocators (libmalloc and libumem) that
                    199: are first fit class allocators. Solaris libmtmalloc works better and is
                    200: a best fit class allocator but its performance is poor than ptmalloc3
                    201: performance;
1.24      bertrand  202: - major bug is fixed in ROW+ intrinsic (new row was not added where it
                    203: should);
                    204: - minor bugs are fixed in interruptions.c (semaphores values when error is
                    205: caught);
                    206: - major bug is fixed in STOP intrinsic. STOP was unable to stop any process
                    207: created by SPAWN;
                    208: - SIGFABORT is added. When process receives SIGFSTOP, it tries to execute
                    209: ATEXIT. If it receives SIGFABORT, it does not;
1.23      bertrand  210: - ONEXIT is renamed in ATEXIT;
                    211: - ONEXIT new intrinsic is added.
1.20      bertrand  212: * Wed Apr 21 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.14 (RPL/2)
                    213: - major bug is fixed in static and shared variables initialization subroutine.
                    214: This bug only occurs when RPL/2 tries to create a shared or static variable
                    215: from an expression;
                    216: - major bug is fixed in copie_etat_processus(). A field that contains
                    217: information about shared variable was not copied to new processus structure;
1.19      bertrand  218: - some little memory leaks are fixed in evaluation(), recherche_type() and
                    219: sequenceur(). They only occured when syntax error were caught;
                    220: - IMPLICIT causes execution error instead system error;
                    221: - Hurd support is improved but currently broken because Hurd does not support
                    222: SIG_INFO. Work in progress;
                    223: - OpenBSD specific support is removed from sources;
                    224: - support for Mac OS X and Windows/Cygwin is added.
1.17      bertrand  225: * Wed Apr 07 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.13 (RPL/2)
                    226: - implicit names can now be disabled by new IMPLICIT intrinsic:
                    227: cauchy:[~/cvs/test] > cat implicit.rpl
                    228: #!/usr/local/bin/rpl -sp
                    229: TEST
                    230: <<
                    231:     "none" implicit
                    232: 
                    233:     1 -> Z
                    234:     <<
                    235:         Z disp
                    236:         'Z' disp
                    237:     >>
                    238: 
                    239:     'Z' disp
                    240:     Z disp // Undefined
                    241: >>
                    242: 
                    243: cauchy:[~/cvs/test] > LANG=C ./implicit.rpl
                    244: +++RPL/2 (R) version 4.0.13 (Wednesday 04/07/10, 13:57:44 CEST)
                    245: +++Copyright (C) 1989 to 2009, 2010 BERTRAND Joel
                    246: 1
                    247: 'Z'
                    248: 'Z'
                    249: +++System : Invalid implicit name [6631]
                    250: cauchy:[~/cvs/test] > 
                    251: 
                    252: RPL/2 aborts because the last Z is undefined and not protected by ''.
                    253: By default, implicit is set to "ALL";
1.16      bertrand  254: - sqlite is upgraded to 3.6.23.1;
                    255: - openssl is upgraded to 1.0.0;
                    256: - major bug is fixed in RETURN intrinsic. It only occurs in evaluation
                    257: subroutine;
                    258: - table variable can now be sorted by SORT;
                    259: - some regressions between libtool 1.x and 2.x are fixed by workarouds in
                    260: Makefiles;
1.15      bertrand  261: - -a command line option analyzes program (structure and syntax) and
                    262: sends preprocessor output to standard output. This option is used by
                    263: rplc (RPL/2 compiler).
1.13      bertrand  264: * Tue Mar 09 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.12 (RPL/2)
                    265: - in formatted file, string format returned a variable length string even if
                    266: format was 'CHARACTER*(n)' (n characters string). Now, 'CHARACTER*(*)' returns
1.15      bertrand  267: a variable length string and 'CHARACTER*(n)' a fixed length string;
1.13      bertrand  268: - keyed access files support is added. Currently, only formatted files are
                    269: supported;
                    270: - direct access files support is added. Currenlty, these files can only be used
                    271: in formatted mode;
                    272: - virtual variables are now writte in UTF-8 and all special characters
                    273: in string are escaped;
1.12      bertrand  274: - all formatted files are now converted into UTF-8;
1.17      bertrand  275: - all file and unix socket names created by RPL/2 are now UTF-8 compliant;
1.12      bertrand  276: - RPL/2 tools (rpliconv, rplfile, rplpp and rplconvert) are now checked before
                    277: each execution (md5 and sha1 sums) to enhance security. If one of these tools
                    278: have been modified between RPL/2 compilation and current execution, RPL/2 aborts
                    279: on a non recoverable system error;
                    280: - openssl and sqlite3 libraries are added;
                    281: - RPL_HOME env variable is added. When RPL/2 is called from librpl, this
                    282: variable indicates RPL/2 root directory. If it is not set, root path
                    283: is given by configure script (d_exec_path);
1.11      bertrand  284: * Thu Mar 03 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.11 (RPL/2)
                    285: - configure.in and makefile.am's are modified to add Cygwin support. Interix
                    286: support is broken;
1.10      bertrand  287: - memory leak is fixed in recherche_type();
                    288: - TeX files are now written in UTF-8 even default locale differs;
                    289: - minor bug is fixed in ->STR (escaped characters);
1.9       bertrand  290: - minor bug is fixed in ->Q intrinsic. Resultat is returned as integer
                    291: fraction intead real one;
                    292: - SIGN now returns (0,0) instead (nan,nan) when complex argument is null;
1.8       bertrand  293: - Makefile.am are modified to authorize parallel builds;
1.7       bertrand  294: - minor bug is fixed in CR intrinsic. CR sends a carriage return to printer
                    295: and writes warning to standard output;
1.6       bertrand  296: * Wed Feb 10 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.10 (RPL/2)
1.5       bertrand  297: - escape codes are now converted in formateur(), not in recherche_type() to
                    298: avoid a minor bug in EDIT and VISIT intrinsics;
1.4       bertrand  299: - minor bug is fixed in formateur_reel();
1.7       bertrand  300: - file-5.03 is patched to avoid bus error on systems that require memory
1.3       bertrand  301: alignment;
1.2       bertrand  302: - minor bug is fixed in evaluation(). Error returned by RPL/C external functions
                    303: were able to be avoided by evaluation routine.
1.1       bertrand  304: * Tue Jan 26 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.9 (RPL/2)
                    305: - New benchmark on same hardware than old one :
                    306: cauchy:[~/rpl/bench] > ./bench.rpl 
                    307: +++RPL/2 (R) version 4.0.9 (samedi 23/01/2010, 18:06:08 CET)
                    308: +++Copyright (C) 1989 ŗ 2009, 2010 BERTRAND JoŽl
                    309: Number of scalar operations per second and per core : 2383016
                    310: 
                    311: - PULPRFL does not abort on BUG() but on execution error;
                    312: - TRIM, REPL and TOKENIZE are added;
                    313: - sockets options are now set before bind();
                    314: - shutdown() is added to all connected sockets;
                    315: - minor bug is fixed in SUB intrinsic (segfault when SUB is called with
                    316: list argument and inexistant elements).
                    317: * Fri Jan 08 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.8 (RPL/2)
                    318: - minor bug is fixed in DAEMON intrinsic. When a program was daemonized, all
                    319: signals sent to main process were not caught because DAEMON did not replace
                    320: old pid by new one;
                    321: - major bug is fixed in IFERR/THEN/ELSE/END. Only occurs in expression
                    322: evaluation when an error is reported from a subroutine in another subroutine.
                    323: For example, error was not caught in following program when it is executed with
                    324: -p option :
                    325:    TEST << iferr TEST2 then end >>
                    326:    TEST2 << 0 inv >>
                    327: - major bug is fixed in variable management. Some local variables were
                    328: seen as global ones;
                    329: - major bug is fixed in rplcore. Rplcore entered in dead lock when
                    330: script file contains a multibyte character;
                    331: - IN intrinsic is added;
                    332: - major bug is fixed in SAME intrinsic : << 1 >> DUP SAME and 'E' DUP SAME
                    333: returned false ;
                    334: - major bug is fixed in RETURN intrinsic. It only occurs in compiled
                    335: programs;
                    336: - major bug is fixed in NEG intrinsic. NEG did not make a copy of its arguments;
                    337: - regression is fixed in compilation(). "\\" was analysed as '"' '\' '\"' and
                    338: strings were never closed;
                    339: - some bugs have been fixed in file management;
                    340: - RPL/2 can now be run on EBCDIC systems (OS/390);
                    341: - major bug is fixed in -A command line option (NULL character is missing);
                    342: - minor bug is fixed in rpliconv and RECODE intrinsic. All transliterations are
                    343: made by blocks (1024 bytes). When an incomplete multibyte sequence is
                    344: encountered at end of block, subroutine aborts with an execution error;
                    345: - major bug is fixed in OPEN (TCP/IPv4 sockets).
                    346: * Mon Nov 30 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.7 (RPL/2)
                    347: - DISP now locks stdout;
                    348: - rpliconv is added to replace standard iconv provided by operating system.
                    349: Indeed, conversion between different encodages requires transliteration
                    350: that is not offered by some iconv utility;
                    351: - CURRENC and RECODE intrinsics have been written to allow strings conversions;
                    352: - bug is fixed in SYSEVAL. When execvp() returns (for example when arg[0] can
                    353: not be found), SYSEVAL enters in a dead lock;
                    354: - fprintf is replaced by some functions that allow transliterations between
                    355: locales;
                    356: - '"' can now be used in strings ("\"");
                    357: - iconv is called with -c in preprocessor stage. It is done to write
                    358: CGI scripts with RPL/2 because locale charset is set to ANSI_X3.4-1968;
                    359: - double free is fixed in liberation() (type SQL, only occurs when locale is
                    360: set);
                    361: - LOCALIZATION, UCASE and LCASE are added;
                    362: - major bug is fixed in EXIT intrinsic that was able to return a false
                    363: execution error in compiled scripts (only in DO/UNTIL and REPEAT/WHILE loops);
                    364: - major bug is fixed in wrapper_instruction_intrinseque(). When intrinsic() was
                    365: used in onLoading from shared library, USE was pushed on stack as algebraic
                    366: expression;
                    367: - libiconv is upgraded to 1.13.1;
                    368: - gnuplot is upgraded to 4.2.6;
                    369: - gsl is upgraded to 1.13.
                    370: * Mon Sep 28 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.6 (RPL/2)
                    371: - pipe() is overwritten by a macro to avoid a system error. Communication
                    372: between process are done with pipes and these pipes are managed by a
                    373: specific asynchrone thread. If a script try to create more threads than
                    374: management thread can destroy, you can quickly achieve maximum number of
                    375: opened files and pipe() shall return a system error. This macro tries to create
                    376: pipes. If pipe() function returns an error, macro waits and retries. If
                    377: number of retries is greater than a hardcoded value, macro returns an error;
                    378: - major bug (deadlock) is fixed in process and thread management. I hope
                    379: this bug shall be the last one;
                    380: - major bug is fixed in DET intrinsic (determinant was computed without LU
                    381: diagonalization);
                    382: - SWAPCNTXT is added;
                    383: - minor bug is fixed in Makefile.am (licences rule).
                    384: * Wed Sep 09 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.5 (RPL/2)
                    385: - some bugfixes are added in process management;
                    386: - all process management is rewritten to avoid usage of defunct process
                    387: or thread number;
                    388: - new major bug is fixed in interruptions.c. Sometimes, when retrait_thread()
                    389: was called before a pending interruption5 (SIGFSTOP), signal handler uses
                    390: a freed semaphore and corrupts heap;
                    391: - CLRERR is added to erase previous errors;
                    392: - ERRN and ERRM return exception message and number;
                    393: - major bug is fixed in interruptions.c. All signal are now bufferised
                    394: when semaphore_liste_threads is null to avoid deadlock. This bug only
                    395: occured when STOP was sent to a dying thread or process (when this thread or
                    396: process was running retrait_thread());
                    397: - matrix rank is computed before matrix inversion;
                    398: - file locks are added to stdin and stdout. stderr is not locked because
                    399: all messages written by signal handlers are sent to stderr;
                    400: - configure.in script is modified to test gcc version and avoid a bug in
                    401: gcc older than 4.4;
                    402: - some benchmarks have been done :
                    403: 
                    404: cauchy:[~/rpl/bench] > ./bench.rpl 
                    405: +++RPL/2 (R) version 4.0.5 (mardi 04/08/2009, 18:23:07 CEST)
                    406: +++Copyright (C) 1989 ŗ 2008, 2009 BERTRAND JoŽl
                    407: Number of scalar operations per second and per core : 2109867
                    408: 
                    409: Workstation :
                    410: cauchy:[~/rpl/build] > uname -a
                    411: Linux cauchy 2.6.30.1 #1 SMP PREEMPT Thu Jul 16 09:49:46 2009 x86_64 GNU/Linux
                    412: cauchy:[~/rpl/build] > cat /proc/cpuinfo | grep "model name"
                    413: model name      : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
                    414: model name      : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
                    415: cauchy:[~/rpl/build] > gfortran -v 2>&1 | grep "gcc version"
                    416: gcc version 4.3.3 (Debian 4.3.3-14) 
                    417: cauchy:[~/rpl/build] >
                    418: 
                    419: - SVL and SVD are added;
                    420: - COND and RANK are added;
                    421: - DIAG-> and ->DIAG are added;
                    422: - major bug is fixed in DET intrinsic. DET is rewritten to avoid usage of
                    423: eigenvalues. In a first time, matrix rank is estimated to force determinant
                    424: to zero if matrix is rank deficient. If not, a PLU decomposition is done to
                    425: compute determinant;
                    426: - QR matrix decomposition is added;
                    427: - LQ matrix decomposition is added;
                    428: - Fortran90 files are rewritten to use Fortran2003 bind(C) statement and
                    429: Fortran preprocessor;
                    430: - default compilation options are now -Wall -Wextra -Wno-pointer-sign
                    431: -Wno-unused-parameter;
                    432: - all mathematical exceptions are now signaled by exceptions instead of
                    433: execution error;
                    434: - minor bug is fixed in both CSTOP and RSTOP intrinsics. Without this fix, you
                    435: can call twice CSTOP without RSTOP;
                    436: - named semaphore support is added (CRSMPHR, CLRSMPHR, SMHRDECR, SMPHRINCR,
                    437: SMPHRTRYDECR, SMPHGETV).
                    438: * Fri Jul 24 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.4 (RPL/2)
                    439: - semaphore is added in interruptions.c to avoid segmentation fault when STOP
                    440: signal is sent to a dying thread. Some mutexes are replaced by semaphores too
                    441: to be used in signal handlers;
                    442: - major bug (memory corruption) is fixed in COL- intrinsic;
                    443: - minor bug is fixed in ALARM and WAIT. These temporisations stopped when a
                    444: software interrupt was caught;
                    445: - rplpp man page is added.
                    446: * Fri Jul 17 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.3 (RPL/2)
                    447: - minor bug is fixed in WRITE (SIGPIPE is ignored to catch error without
                    448: process termination);
                    449: - major bug is fixed in FUSE intrinsic (FUSE kills itself and do not kill
                    450: its parent);
                    451: - a mutex to protect fork() syscall is added;
                    452: - all mutexes are unlocked after fork() in DETACH;
                    453: - minor bug (double free corruption) is fixed in CLOSE intrinsic;
                    454: - major bug is fixed in lecture_pipe when a nullified list is sent into a pipe;
                    455: - WORKDIR intrinsic is added;
                    456: - Level 0 variables are shared between all threads without copy. Indeed,
                    457: there variables are not modifiable and only contains static user definitions;
                    458: - branches prediction is added in THEN, ELSE, ELSEIF and REPEAT intrinsics;
                    459: - FORTRAN 77 file management subroutines are rewritten in pure C due to
                    460: FORTRAN string management. C/FORTRAN 77 string interfaces are broken
                    461: in some cases (gcc/gfortran/libc/OS and arch conjonction);
                    462: - a memory leak is fixed in REMOVE intrinsic;
                    463: - major bug is fixed in MySQL driver (segfault due to a bug in mysql_init()
                    464: and due to a libmysqlclient that is not thread safe).
                    465: * Wen Jun 10 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.2 (RPL/2)
                    466: - new enhanced allocator is written for regular variables, static variables and
                    467: shared variables;
                    468: - major bug is fixed in src/interruptions.c. This file did not compile
                    469: when SQL support was not enabled;
                    470: - new allocator is written for system stack and last stack;
                    471: - --enable-profile flag is added to configure script. When this flag is
                    472: enabled, rpl is built with -pg option;
                    473: - SIGFSTP (from Solaris'TERMIO) is caught. On Solaris 10, all process receive
                    474: SIGFSTP (with a nullified siginfo structure) instead of SIGHUP when control
                    475: process is killed;
                    476: - abs() macro is modified to avoid multiple evaluation. Your C compiler has to
                    477: know typeof() intrinsic function. This function is not standard but exists
                    478: under Sun Studio, gcc, and maybe some others compilers. If this function does
                    479: not exist on your compiler, you can change its definition by old one in
                    480: src/rpl.h;
                    481: - fflush() can now be interrupted by signal (SunOS);
                    482: - fflush(NULL) is called before all fork() occurrences;
                    483: - generators returned by RDGN help are sorted;
                    484: - Lapack is now 3.2.1.
                    485: * Mon May 18 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.1 (RPL/2)
                    486: - bug is fixed in src/generateurs_aleatoires.awk. It only occurs when RPL/2 is
                    487: built under Solaris.
                    488: * Wed May 5 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0 (RPL/2)
                    489: - major bug is fixed in matrix inversion (due to an inversion between pointer
                    490: and object copies);
                    491: - RDGN is added to use some different random number generators. See HELP RDGN;
                    492: - code analysis is rewritten from scratch to be more efficient and mode
                    493: expandable;
                    494: - minor bug (segfault in interruption1) is fixed. It only occurs on Solaris
                    495: that can returns a nullified siginfo pointer when SIGINT is sent by kernel
                    496: keyboard driver;
                    497: - gnuplot is now 4.2.5;
                    498: - readline is upgraded to 6.0;
                    499: - file is upgraded to 5.0;
                    500: - Signal handlers are rewritten to send signal to main thread when a signal
                    501: is send from an external process;
                    502: - configure.in is modified to avoid a libc bug on Solaris (free() can enter in
                    503: deadlock when a huge amount of threads is launched);
                    504: - minor bug is fixed in boath START and FOR intrinsic. Only occurs when
                    505: arguments types are unsupported;
                    506: - PLOT instrinsic is added (usage: LINE and MARK do not draw anything. All
                    507: data are buffered. PLOT is used to draw these objects.);
                    508: - MARK instrinsic is added;
                    509: - new allocator mechanism is written;
                    510: - some regression bugs have been fixed, some memory leaks too.
                    511: * Wed Jan 28 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.9 (RPL/2)
                    512: - an estimation of future stack elements is added to avoid some costly memory
                    513: allocations. This function has a positive impact on execution speed;
                    514: - PSHPRFL and PULPRFL have been added;
                    515: - RPL/2 can be built on Solaris 64 bits with some minor scripts alterations.
                    516: See README for more explanations;
                    517: - MTXSTATUS intrinsic is added;
                    518: - YIELD intrinsic is added;
                    519: - ERRM is fixed. In some cases, ERRM uses some uninitialized pointers;
                    520: - SHARED and PRIVATE intrinsics have been added. A shared variable is a
                    521: static variable that is shared by multiple threads;
                    522: - '->' intrinsic is improved. All object copies have been avoided;
                    523: - -n flag is added to catch HUP signal. stderr and stdout are redirected
                    524: to a file, stdin is redirected to /dev/null when control process is killed;
                    525: - a mutex is added to each object (before this modification,
                    526: RPL/2 used a global mutex and performances in multithreaded programs were very
                    527: poor.);
                    528: - ALARM is now interruptible;
                    529: - both PUT and PUTI intrinsics are improved and do not copy list and table
                    530: when nombre_occurrences == 1;
                    531: - COPY intrinsic is added. Argument (that can be pointed from some objects)
                    532: is replaced by a new copy of itself;
                    533: - memory leak is fixed in sequenceur(). It only occurs when an execution error
                    534: is caught from interactive mode;
                    535: - mutexes have been added (CRMTX, CLRMTX, MTXLOCK, MTXUNLOCK);
                    536: - new mutex type is added;
                    537: - profile statistics have been added. See -P option;
                    538: - major bug is fixed in analyse_syntaxique();
                    539: - new SQL type is added;
                    540: - due to a trouble in libpq in multithreaded context, SQL intrinsic is split
                    541: in three new intrinsics : SQLCONNECT, SQLQUERY and SQLDISCONNECT. Please note
                    542: that all programs that worked with old SQL intrinsic can now work with
                    543: SQLQUERY. With all new programs, you can open a real connection to databases;
                    544: - NRPROC is added. This new intrinsic is used to catch error from child
                    545: process. Without NRPROC, any errors returned by child process cause
                    546: main process to abort;
                    547: - SPAWN is added. This new intrinsic is used to launch a new thread (DETACH
                    548: starts a new process). There are no mutexes in RPL/2 because all spawned process
                    549: use specific context. Nevertheless, shared variables and associated mutexes
                    550: should be added;
                    551: - -D flag and DAEMONIZE intrinsic have been added;
                    552: - REPEAT, THEN, ELSE and ELSEIF intrinsics are rewritten to be more efficient;
                    553: - autoconf script is modified to handle mysql and postgresql on non standard
                    554: directories;
                    555: - -t flag is fixed ('\0' is missing...);
                    556: - SWI and SEND pipes have been modified to be more robust on systems where
                    557: getpid() can return (pid_t) -1 or (pid_t) -2 value;
                    558: - major bug is fixed in REPEAT intrinsic. Only occurs in compiled mode;
                    559: - all but jump variables are removed from source. All signal handlers now
                    560: use encapsulated variables and signals are caught by thread;
                    561: - major bug is discovered in ->LCD. Both LCD-> and ->LCD have been fixed;
                    562: - NEWPLANE is added;
                    563: - LINE is added;
                    564: - DGTIZ is added;
                    565: - major bug is fixed in ROW-> intrinsic (comes from new garbage collector);
                    566: - lot of multiprocessing related bugs have been fixed; That was a huge work but
                    567: it's done. Data integrity is now respected during transmission (POKE, SEND and
                    568: SWI);
                    569: - ITRACE is added. This intrinsic is only used to debug internal structures and
                    570: should not be used in regular programs;
                    571: - SWISTATUS is written;
                    572: - WFACK is written;
                    573: - rplcore files are now able to handle compilation errors;
                    574: - rplcore files are now able to handle evaluation and interruption errors;
                    575: - SORT can now be used on table;
                    576: - tables can now be sent by POKE and SEND instrinsics;
                    577: - software interrupts do not inherit IFERR controls;
                    578: - LOGGER intrinsic is added;
                    579: - All WF* intrinsics but WFSOCK are made interruptible;
                    580: - ISWI intrinsic is added. Current interrupt is marked as 'interruptible';
                    581: - tables can be used with SAME intrinsic;
                    582: - minor bug is fixed in recherche_variable(). Only occurs when an error
                    583: is caught;
                    584: - external functions can now be used in expressions;
                    585: - major bug (deadlock) is fixed in WFPOKE intrinsic;
                    586: - some mistakes have been fixed under Solaris;
                    587: - major bug is fixed in RETURN intrinsic (only occurs when evaluation and
                    588: program modes are mixed);
                    589: - major bug (dead lock) is fixed in gestion_processus.c;
                    590: - major bug is fixed in WFPROC;
                    591: - rplc, rpllink and mkrplso manpages are added;
                    592: - rpltags tool and manpage are added;
                    593: - WFLOCK is fixed;
                    594: - RPL/2 kills now all process on error;
                    595: - major bug (segfault) is fixed in REMOVE intrinsic.
                    596: * Mon Jul 28 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.8 (RPL/2)
                    597: - configure script is modified to check mysql and postgresql libraries
                    598: on all standard locations. Tested and works on FreeBSD, Solaris and Linux
                    599: Debian;
                    600: - Tables are allowed in eval ( <[ 1 ]> 't' sto 't(1)' eval );
                    601: - ->TABLE and TABLE-> intrinsics are added;
                    602: - major bug is fixed in recherche_type(). Only occurs when rpl executes
                    603: precompiled scripts;
                    604: - new type is added: table with <[ ]> delimiters:
                    605: RPL/2> { 2 3 2 } crtab
                    606: 
                    607: 1: <[ <[ <[ { }
                    608:             { } ]>
                    609:          <[ { }
                    610:             { } ]>
                    611:          <[ { }
                    612:             { } ]> ]>
                    613:       <[ <[ { }
                    614:             { } ]>
                    615:          <[ { }
                    616:             { } ]>
                    617:          <[ { }
                    618:             { } ]> ]> ]>
                    619: 
                    620: CRTAB new intrinsic creates a regular table. By default, all elements are
                    621: nullified lists;
                    622: - rplexternals.h is modified and improved;
                    623: - GNU File (renamed as rplfile) cannot be built due to a bug in libtoolize and
                    624: configure script.
                    625: * Mon Jun 23 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.7 (RPL/2)
                    626: - libiconv is added (iconv library exists on some systems but implemantations
                    627: differ and RPL/2 can crash);
                    628: - --enable-encoding is added to configure script to force system encoding.
                    629: Enconding detection does not work on OpenBSD;
                    630: - internal file utility is shipped and used to avoid xBSD file mistakes;
                    631: - GSL 1.11 and gnuplot 4.2.3 are now used;
                    632: - src/Makefile.am is modified to built RPL/2 ons Solaris 10/sparc;
                    633: - all but user's messages are written on stderr;
                    634: - DUPCNTXT and DROPCNTXT are added to handle more efficiently contexts;
                    635: - SCHED is added. Whit SCHED, you can limit CPU ressource by RPL/2 process;
                    636: - FUSE, RFUSE and CLRFUSE have been added;
                    637: - new bug discovered on NetBSD. sigpending() does not return any signal, thus
                    638: DETACH intrinsic enters in a definitive dead lock. I have no idea to write a
                    639: workaround for this major bug. Nevertheless, all others capabilities seems to
                    640: work fine;
                    641: - '->' is modified to return error when program tries to initialiaze two
                    642: variables with the same name like
                    643: 1 0 -> I I << ... >>;
                    644: - CSTOP and RSTOP have been added (catch and release stop signal);
                    645: - CONTINUE is added to continue a pending process halted by SUSPEND;
                    646: - SUSPEND is modified to be stopped by SIGFSTOP;
                    647: - src/Makefile.am is modified to avoid //TRANSLIT flag on systems that don't
                    648: support GNU iconv;
                    649: - configure.in script is modified to avoid bugs when --with-postgresql and
                    650: --with-mysql are specified;
                    651: - TRNC is written;
                    652: - minor bug is fixed in both IFT and IFTE. Returned expression has to be
                    653: evaluated.
                    654: * Fri Apr 11 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.6 (RPL/2)
                    655: - SIGPIPE signal handler is modified to avoid abort process when POKE tries
                    656: to write data into a pipe without reader;
                    657: - major bug is fixed in RETURN intrinsic. When RETURN was called from a detached
                    658: process without -p modifier, it can send an ABORT signal instead a KILL one;
                    659: - PEEK, POKE and WFPOKE new intrinsics are written;
                    660: - major bug due to new garbage collector is fixed in rplexternals.h (double free
                    661: corruption);
                    662: - CLRCNTXT is added (clear contexts);
                    663: - VERIFY intrinsic is written;
                    664: - PSHCNTXT and PULCNTXT are added (PSHCNTXT pushes context on an
                    665: internal contexts stack, PULCNTXT pulls contexts from this internal stack).
                    666: Main usages of these intrinsics are in conjonction with IFERR or with
                    667: software interrupts;
                    668: - HEAD, TAIL and REVLIST intrinsics are added;
                    669: - function pointers have been added to function description;
                    670: - new analyse() routine is written. All instrinsics are now in a N-tree;
                    671: - software interrupts have been fixed;
                    672: - multitasking capabilities have been modified to be usable on NetBSD. All real
                    673: time signals have been removed;
                    674: - major bugs are fixed in multitasking (mutex trouble _and_ segmentation fault);
                    675: - minor bug is fixed in STR->. STR-> could return a system error instead an
                    676: execution one;
                    677: - first bug due to new garbage collector is fixed in '+' ({ } { } +) and in
                    678: '-' intrinsics;
                    679: - PostgreSQL support is written.
                    680: * Mon Mar 17 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.5 (RPL/2)
                    681: - locale can now be specified in SQL intrinsic :
                    682: { "mysql:iso-8859-1" "server" "database" ... };
                    683: - major bug is fixed un analyse_algebrique(). When DISP printed an algebraic
                    684: object, 'DISP()' was pushed in stack;
                    685: - same major bug is fixed in <, >, <=, >= and <>;
                    686: - major bug fixed in formateur() (segfault when a symbol is used without "'");
                    687: - major bug is fixed in DUPN intrinsic;
                    688: - when software interrupt (SWI) is evaluated, SWI pushs process id on stack
                    689: before starting interrupt evaluation;
                    690: - -f parameter is added when iconv is called;
                    691: - as old file program was bugged, a new option is added to configure script.
                    692: When configure is called with --disable-encoding-autodetection, make does not
                    693: try to detect source encoding. Please, do not use if RPL/2 can be built
                    694: without this option !
                    695: - new garbage collector (and more efficient) is written;
                    696: - configure script is modified to be usable on NetBSD 4.0, but as NetBSD does
                    697: not support real time signals, RPL/2 cannot use multitasking functions;
                    698: - error returned by preprocessor are now catched by RPL/2;
                    699: - -p option is added. With this option, all scripts are compiled before
                    700: RPL/2 starts evaluation. HALT cannot be used with -p, but all programs run
                    701: 40% faster;
                    702: - read and write operations in pipe() are rewritten to be sure that such
                    703: operations are atomic;
                    704: - minor bug is fixed in LOGSCALE. With {} LOGSCALE, all scales have to be
                    705: linear;
                    706: - major bug is fixed in gestion_processus.c (some pipes were not closed).
                    707: * Sat Jan 5 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.4 (RPL/2)
                    708: - major bugs have been fixed in software interrupt management.
                    709: * Fri Jan 4 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.3 (RPL/2)
                    710: - JDATE and RDATE are written;
                    711: - minor bug (segfault) is fixed in EXSUB. It only occurs when EXSUB is executed
                    712: with wrong arguments;
                    713: - KILL now kills current process, ABORT kills program;
                    714: - software interrupts support is added (SWI, WFSWI, SWILOCK, SWIUNLOCK,
                    715: SWIQUEUE, STOSWI, RCLSWI, CLRSWI);
                    716: - major bug is fixed in SQL intrinsic (argument types);
                    717: - system stack is now written in core file;
                    718: - ALARM is added;
                    719: - nanosleep() now replaces sleep() and usleep() system calls;
                    720: - _GNU_SOURCE is added to rpl.h.
                    721: * Fri Nov 30 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.2 (RPL/2)
                    722: - License is changed. Now RPL/2 license is CeCILL (GPL compliant);
                    723: - EXGET adn EXSUB are added;
                    724: - minor bug is fixed in recherche_type(). { <<†} has to return an error.
                    725: '<<' and '>>' are both functions _and_ delimiters. Thus { IF } is
                    726: acceptable, but {†>> } isn't;
                    727: - GSL is now 1.10, gnuplot 4.2.2 and units 1.87;
                    728: - OBGET and OBSUB intrinsics are added;
                    729: - src/Makefile.am minor bug is fixed (make clean deleted src/rpl.xpm);
                    730: - WAIT intrinsic is modified to use sleep() and usleep() if delay is
                    731: greater than one second. On some systems, usleep argument must be lower
                    732: than 1E6;
                    733: - numeric and character formats are now tested;
                    734: - -A flag is added. -A is used to give command line parameters to main
                    735: routine. Example:
                    736: rayleigh:[~/rpl-4.0.0.prerelease.2/examples] > ./test3.rpl -A "<< X sin >>"
                    737: +++RPL/2 version 4.0.0.prerelease.2 (vendredi 05.10.2007, 19:03:01 CEST)
                    738: +++Copyright (C) 1989 ŗ 2006, 2007 BERTRAND JoŽl
                    739: << 'X' SIN >>
                    740: rayleigh:[~/rpl-4.0.0.prerelease.2/examples] > cat test3.rpl 
                    741: #!/usr/local/bin/rpl -s
                    742: 
                    743: TEST
                    744: <<
                    745:     disp
                    746: >>
                    747: - minor bug (segfault) is fixed in encart() routine (splash screen). Child
                    748: process ended with segfault due to a mistake in Motif widget cleaning
                    749: process;
                    750: - major bug is fixed in DETACH intrinsic. Child process were locked when
                    751: they were started with a locked mutex that comes from its father;
                    752: - ctrl+C can now kill all child process;
                    753: - WFPROC and WFDATA are rewritten;
                    754: - RETURN is fixed to be usable in detached process;
                    755: - HALT is not exported to child process;
                    756: - FLOW filetype is added;
                    757: - Makefiles are modified to support gcc-4.2 and gfortran-4.2;
                    758: - socket support (Unix, IPv4, IPv6, STREAM, DATAGRAM, ROBUST DATAGRAM,
                    759: SEQUENTIAL DATAGRAM, RAW) is added. Warning: IPv6 sockets have not been tested
                    760: because I don't have any IPv6 compliant server, but they should work.
                    761: * Mon Sep 10 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.1 (RPL/2)
                    762: - library management is rewritten from scratch. EXTERNAL is removed and
                    763: EXTERNALS is added. Now, all exported symbols are sent to RPL/2 when
                    764: library is loaded;
                    765: - OPEN arguments are changed;
                    766: - EXTERNAL now checks availability of external functions;
                    767: - number of arguments is verified in analyse_algebrique().
                    768: 'SIN(A+X,2)' is now refused because SIN requires only one argument;
                    769: - all but lapack symbols are exported from librpl with librpl, f77 or f90
                    770: prefix;
                    771: - minor bug is fixed in formateur() (AND and OR requires parenthesis);
                    772: - rplexternals.h header file is added; Now, it is very easy to write
                    773: external functions;
                    774: - memory leak is fixed in analyse_algebrique();
                    775: - minor bug (symbole flag) is fixed in sequenceur.c and types.c;
                    776: - temp file was not removed when an error occurs in EDIT or VISIT;
                    777: - 'name' should not returned a function ("FCT" object);
                    778: - -rdynamic is added to src/Makefile.am.
                    779: * Mon Jul 23 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.0 (RPL/2)
                    780: - Major bug is fixed in interface_tex.c. When there are errors in latex
                    781: file, latex command waits for input on its command line;
                    782: - major bug is fixed in tex.h (multiline strings);
                    783: - examples subdir is added;
                    784: - major bug is fixed in recherche_variable(). When an expression is evaluated
                    785: in a function, all variables set in this function must be visible in
                    786: expression. Thus, << I -> 3 << << I >> eval >> must return 3, not 'I';
                    787: - LAST stack is saved in rplcore;
                    788: - major bug is fixed in ->HMS. It only occurs when argument type is not
                    789: integer or real;
                    790: - major bug (segfault) is fixed when rpl is called with empty file;
                    791: - libtool support is removed. Two new scripts (rplc and rpllink) are provided
                    792: to use librpl.a;
                    793: - automake scripts are rewritten to avoid a misconfiguration of librpl.a
                    794: when -j make option is used;
                    795: - trace output now contains PID;
                    796: - rpl-core is renamed in rpl-code-$PID;
                    797: - rplc and rpllink scripts can now sompile and build C and Fortran
                    798: executables with librpl.a;
                    799: - New classification, only a working simplification() routine is
                    800: required to announce 4.0.0.final;
                    801: - librpl entry point is modified to return results as strings array;
                    802: - -S option is added;
                    803: - due to a major bug in libtool, libtool is removed from autoconf/automake
                    804: scripts;
                    805: - VERSION is modified to return a list.
                    806: * Tue Jul 17 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8x (RPL/2)
                    807: - major regression bug is fixed in PRINT due to mistake in latex pathes;
                    808: - gnuplot does not have to be built if --disable-embedded-gnuplot is set;
                    809: - new prompt ("RPL/2> ") is used for interactive mode;
                    810: - ARCCOS, ARCSIN, ARCTG, ARGCH, ARGSH, ARGTH, CH, SH, TH and TG intrinsics
                    811: are removed, because all of these intrinsics have two forms. ARCCOS is
                    812: the same than ACOS, TAN=TG, COSH=CH. Please adapt your scripts;
                    813: - gnuplot compilation does not have to be done when disable-gnuplot is set;
                    814: - major bug is fixed in RECV that avoid usage of multitasking.
                    815: * Tue Jul 10 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8w (RPL/2)
                    816: - False error (system error) was reported by recherche_type();
                    817: - recherche_type() returns syntax error if a list is included in
                    818: an algebraic expression;
                    819: - --enable-debug is modified. Now, return can be defined to print
                    820: on stdout its position in source code (line and function);
                    821: - minor bug is fixed in recherche_type(). Don't forget that space
                    822: are not significant in algebraic expression:
                    823: '12 3+ 12    X' is the same expression than '123+12X';
                    824: - src/Makefile.am is modified to avoid double compilation process;
                    825: - --enable-final-run-path is added to configure.in script;
                    826: - STATIC is modified to declare static variables in expression. Warning: static
                    827: variables used in expressions are deleted when evaluation of this expression
                    828: ends;
                    829: - MEM does not report static variable sizes;
                    830: - minor bug is fixed in HELP intrinsic. When the last instruction was not
                    831: known, HELP function was pushed in operational stack. HELP did not work
                    832: when there were space on input line.
                    833: * Mon May 28 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8v (RPL/2)
                    834: - DATE is modified: reduced julian days is replaced by fraction part
                    835: of julian days. Old field used by julian days is now integer part of julian
                    836: days;
                    837: - CONVERT intrinsic is rewritten to accept absolute path in popen;
                    838: - automake scripts are modified to delete src/lock file if build process aborts;
                    839: - rplargs.h directly includes rpl.h;
                    840: - absolute pathes are added to all external program files (rplplot, rplpp...);
                    841: - intrinsic functions are case sensitive. External functions are case
                    842: unsensitive. A minor bug is fixed in recherche_type() because all external
                    843: functions were case unsensitive when they were evaluated from RPN expressions;
                    844: - HELP function is rewritten to be more friendly (a la OpenVMS);
                    845: - external wrapper (rplplot) is written to force usage of gnuplot provided
                    846: by RPL/2 if it is built during build process. If this build does not exist,
                    847: it tries to launch regular gnuplot;
                    848: - gnuplot is added to source tree to avoid some trouble between preinstalled
                    849: gnuplot and release used by RPL/2. This addition to source tree is
                    850: required by some incompatibility between gnuplot releases;
                    851: - Lapack is upgraded to 3.1.1 release;
                    852: - GSL is upgraded to 1.9 revision;
                    853: - RPL_TMP_PATH env variable is added to specify the path of tempfiles. If
                    854: it is not set, /tmp is used. If /tmp is not writable, /var/tmp is used. If
                    855: not, ./ but RPL/2 can hang with a fatal error if this last location is
                    856: not writable;
                    857: - major regression is fixed in SYSEVAL intrinsic due to introduction of
                    858: error scrutation.
                    859: * Sat Mar 24 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8u (RPL/2)
                    860: - SYSEVAL is modified to return an error when execvp() syscall cannot
                    861: execute its arguments;
                    862: - -hard-float sparc option is remove from mkrplso;
                    863: - major bug is fixed in SQL intrinsic that hangs when query did not return
                    864: any values (for exemple INSERT);
                    865: - escape sequences can be used in SYSEVAL argument like "echo \"string\""
                    866: SYSEVAL;
                    867: - graphic and PostScript outputs are now cleared in child process;
                    868: - locales are now used by preprocessor;
                    869: - major bug is fixed in impression_tex(). PRINT did not work due to a bug
                    870: introduced by multitasking code;
                    871: - SORT can now use name as its argument.
                    872: * Sun Jan 21 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8t (RPL/2)
                    873: - Variable management has been rewritten and some tests have been done. Now,
                    874: it is possible to execute:
                    875: 
                    876: #!/usr/local/bin/rpl -sc
                    877: 
                    878: TEST
                    879: <<
                    880:     1 1000 start VAR_S VAR_S2 next
                    881: >>
                    882: 
                    883: VAR_S
                    884: <<
                    885:     static 3 -> C << C disp 'C' incr if C 10 > then 'C' volatile end >>
                    886: >>
                    887: 
                    888: VAR_S2
                    889: <<
                    890:     static 3 -> C << C disp 'C' decr >>
                    891: >>
                    892: 
                    893: - configure.in script is added in lapack subtree;
                    894: - VARS is modified to display variables status (LOCKED/UNLOCKED and
                    895: STATIC/VOLATILE/PARAMETER/VARIABLE);
                    896: - STATIC and VOLATILE intrinsics are added to specify static variables. A
                    897: static variable can be transformed into volatile with VOLATILE.
                    898: With STATIC, next variables created by '->' are static;
                    899: - PROTECT and UNPROTECT are added to protect variables against write
                    900: or purge actions. New PARAMETER and VARIABLE intrinsics are modified
                    901: versions of PROTECT and UNPROTECT that only deal with global variables
                    902: (see RCL/SAVE);
                    903: - variable management routines have been rewritten. The new ones are
                    904: uncompatible with the old ones. Before these changes, a local variable
                    905: was exported to a child subroutine, but cannot be modified into this
                    906: child subroutine. Now, a local variable is accessible only in its subroutine;
                    907: - SAVE intrinsic is added to manipulate global variables;
                    908: - SUSPEND is written. RPL/2 waits for a SIGCONT signal;
                    909: - SORT, COL->, ->COL, ROW->, ROW-> intrinsics are written;
                    910: - Makefile.am are improved;
                    911: - minor bug is fixed in ->list and ->array. Without any argument, these
                    912: intrinsic only send a SIGSEGV;
                    913: - ncurses is updated to release 5.6;
                    914: - lapack is updated to 3.1.0.
                    915: * Sun Dec 31 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8s (RPL/2)
                    916: - default CFLAGS/FFLAGS/FCFLAGS are modified due to a bug in gcc-sparc64
                    917: that avoid a complete build;
                    918: - CTRL+Z and CTRL+C signals only perform actions on main process;
                    919: - major bugs are fixed in multitasking capabilities (some mistakes with
                    920: mutexes and several terminated child process cannot be closed by the
                    921: operating system);
                    922: - minor bug fixed in SCLS (mistake between main and auxiliary axes);
                    923: - variables are now written in rpl-core file;
                    924: - NEG is modified to return 0 instead -0 when its argument is real or complex
                    925: number;
                    926: - ROW+ intrinsic can now be used on empty matrix without dimension error:
                    927: [[]] 1 [[ 1 2 ]] row+;
                    928: - major bug is fixed in SUB intrinsic. It only occurs with lists when
                    929: it tries to returns invalid elements like { } 1 2 sub;
                    930: - major bug is fixed in ROW- intrinsic;
                    931: - major bug is fixed in ROW+ intrinsic.
                    932: * Sat Dec 02 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8r (RPL/2)
                    933: - creation_nom_fichier() is rewritten to force all process to create
                    934: different file names;
                    935: - RANLUX is removed to use GSL library and avoid a bug in gfortran-4.1;
                    936: - readline-5.2 and units-1.86 are now used;
                    937: - SEQUENCE statement is added in fonctions_speciales.f90 to fix a build
                    938: failure.
                    939: * Mon Oct 23 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8q (RPL/2)
                    940: - wfproc is rewritten to avoid a dead lock;
                    941: - major mistake is fixed in both sommation_vecteur_reel() and
                    942: sommation_vecteur_complexe();
                    943: - multitasking is rewritten from scratch to fix some mistakes with
                    944: multithreading. DETACH, SEND and RECV now use four real time signals to
                    945: perform a better task synchronization;
                    946: - some bugs introduced by locales specific compilations are fixed;
                    947: - major memory corruption is fixed in DEPND;
                    948: - HELP intrinsic is modified to print a classified output.
                    949: * Mon Aug 12 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8p (RPL/2)
                    950: - major memory leak is fixed in DETACH intrinsic. Files were closed by
                    951: both childs and parent;
                    952: - bug that avoids usage of Motif is fixed in configure.in;
                    953: - makefile's are modified to build RPL/2 with other locale than ISO-8859;
                    954: - db is removed from source tree due to some compilation troubles (db's
                    955: autoconf script is broken);
                    956: - sdb is removed from source tree due to some memory leaks and some troubles
                    957: with its configure script. New SQL routines are written, but only MYSQL
                    958: subsystem is available. Now, SQL can be used without memory leak;
                    959: - major bug is fixed in evaluation() subroutine. Value of error flag
                    960: was not returned in some cases;
                    961: - FACT intrinsic does not accept real arguments anymore due to the new intrinsic
                    962: GAMMA;
                    963: - GAMMA intrinsic is added (complex function) ;
                    964: - autoconf/automake scripts are modified to compile F90 sources;
                    965: - src/distributions.f is replaced by src/distributions.f90. All Numerical
                    966: Recipes references are avoided to use GSL;
                    967: - GSL is upgraded to 1.8 release;
                    968: - -lz is added in src/Makefile.am to fix a mistake in sparc32.
                    969: * Mon Apr 10 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8o (RPL/2)
                    970: - fft.f is removed. Now FFT intrinsic uses dft subroutine;
                    971: - Sparc64 optimizations are modified. Now gcc-4.0 can be used to build RPL/2 on
                    972: Sparc64. Same modifications are done on sparc32;
                    973: - major bug are fixed in both PLOTTER and HISTOGRAM intrinsics
                    974: (interface with GNUplot).
                    975: - major bugs are fixed in USE/REMOVE intrinsics (system stack corruption);
                    976: - corruption of last stack is fixed in mclrin (only occurs when an error is
                    977: caught);
                    978: - major bug (in a malloc condition) is fixed in derivation().
                    979: * Tue Jan 07 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8n (RPL/2)
                    980: - configure script and makefiles are modified to be usable with automake
                    981: 1.9.6 (GNU), libtool 1.5.20 (GNU) and autoconf 2.59 (GNU).
                    982: - gestion_fichiers() prototype is modified to be built by gfortran. Now,
                    983: gfortran is the default compiler for FORTRAN code included in RPL/2;
                    984: - libdb is added to perform indexed file access;
                    985: - SQL interfaces are added (SQL intrinsic). Only mysql is supported;
                    986: - minor bug is discovered and fixed in matrix multiplication (precision);
                    987: - rpl.spec.in and debian directory are deleted due to some mistakes in the
                    988: scripts required to build packages.
                    989: * Tue Nov 15 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8m (RPL/2)
                    990: - major bug is fixed in IFERR/THEN/(ELSE)/END structure. It occured when an
                    991: error is caught before a regular IF/THEN/(ELSE)/END structure in
                    992: IFERR/THEN/(ELSE)/END structure;
                    993: - chmod 755 debian/rules is done by makefile;
                    994: - major bug is fixed in recherche_instruction_suivante():
                    995: +++"123 " str->
                    996: +++Erreur : Argument invalide pour la commande << "123 " str-> >>
                    997: Before this fix, it was impossible to use a command line that ends with spaces.
                    998: * Sat Oct 29 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8l (RPL/2)
                    999: - SELECT/CASE/DEFAULT/END is modified. Now, it is impossible to write:
                   1000: SELECT
                   1001:    <case>
                   1002:    CASE <test> THEN <expr> END
                   1003:    ...
                   1004:    DEFAULT
                   1005:    DEFAULT <- two DEFAULT's
                   1006: END
                   1007: 
                   1008: or
                   1009: 
                   1010: SELECT
                   1011:    <case>
                   1012:    CASE <test> THEN <expr> END
                   1013:    ...
                   1014:    DEFAULT
                   1015:    ...
                   1016:    CASE <test> THEN <expr> END <- CASE statement after DEFAULT
                   1017: END
                   1018: - major bug is fixed (in (unsigned char) getc()). It only occurs when RPL/2 is
                   1019: built with gcc-4.0.
                   1020: - configure.in is modified to be usable with gcc-4.0.
                   1021: * Mon Oct 3 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8k (RPL/2)
                   1022: - segmentation fault occurs in both PROMPT and INPUT when readline returns
                   1023: NULL (ctrl^D). This trouble is now fixed;
                   1024: - major bug is fixed in DATE intrinsic (julian days and reduced julian days);
                   1025: - stderr of rplpp is now caught;
                   1026: - SYSEVAL is modified to use stdin, stdout and stderr:
                   1027: ESSAI
                   1028: <<
                   1029:    // Only stdout and stderr
                   1030:     "ls" dup disp syseval
                   1031:     clmf
                   1032:    // Now with stdin ("zer\naze\n")
                   1033:     { "cat" "zer" "aze" } dup disp syseval
                   1034:     clmf
                   1035: >>
                   1036: - GSL is upgraded to 1.7.
                   1037: * Thu Sep 29 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8j (RPL/2)
                   1038: - SYSEVAL is modified. It now returns stdout and stderr in a list;
                   1039: - minor memory leak is fixed in recherche_instruction_suivante() subroutine.
                   1040: * Thu Aug 4 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8i (RPL/2)
                   1041: - internal file descriptors are modified to be usable with DUMP intrinsic;
                   1042: - VARS intrinsic is modified and now prints value of variables.
                   1043: * Thu Jul 21 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8h (RPL/2)
                   1044: - units is upgraded to 1.85 release;
                   1045: - -d flag is added in command line. Don't use this flag if you don't know
                   1046: what you do! It is only used to debug internal memory allocations;
                   1047: - internal pointers (ADR objects) are printed as 64 bits pointers to be usable
                   1048: on 64 bits wide architectures.
                   1049: * Sat apr 16 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8g (RPL/2)
                   1050: - DUMP is rewritten to be portable. It works, but without shared libraries,
                   1051: printer file, graphic files and last error. Support for this kind of objects
                   1052: shall be available as soon as possible. Warning: DUMP cannot be used in
                   1053: multiprocessing;
                   1054: - configure.in script is modified to return an error when g77 is not found;
                   1055: - a new internal type is used to handle shared libraries;
                   1056: - a major bug is discovered and fixed in recherche_type(). It only occurs
                   1057: in interactive mode ([[ 1 ]] returns a syntax error);
                   1058: - a major bug is found in simplification_arbre(). Subroutine is disabled.
                   1059: * Thu mar 17 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8f (RPL/2)
                   1060: - option -r is added to restart a process from a dump file;
                   1061: - DUMP intrinsic is added. It performs synchronous checkpointing;
                   1062: - GSL is upgraded to release 1.6.
                   1063: * Wed dec 22 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8e (RPL/2)
                   1064: - Result types of PERM and COMB instrinsic are fixed;
                   1065: - RPL/2 now uses a new preprocessor due to a new 'feature' in gcc/cpp;
                   1066: - RPL/2 can now use all processors on multiprocessor workstations with
                   1067: DETACH, SEND, RECV and WFPROC new intrinsics. The first test program was:
                   1068: 
                   1069: #!/usr/local/bin/rpl -cs
                   1070: 
                   1071: MULTIPROCESSUS
                   1072: <<
                   1073:     'FONCTION' detach
                   1074:     do "B" disp until false end
                   1075: >>
                   1076: 
                   1077: FONCTION
                   1078: <<
                   1079:     do "A" disp until false end
                   1080: >>
                   1081: 
                   1082: * Sun dec 12 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8d (RPL/2)
                   1083: - major bug is discovered and fixed in analyse_notation_algebrique :
                   1084: +++'A-B-C' returned
                   1085: 1: 'A-(B-C)' instead of 1: 'A-B-C'. It is now fixed;
                   1086: - recherche_type() routine is improved to cast in name 1E5E-6 or 1.23.4.5.
                   1087: * Fri dec 7 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8c (RPL/2)
                   1088: - major bug is fixed in formateur_fichier(). Now, it is possible to use
                   1089: lists in a file record. Note that only sequential and formatted files
                   1090: are supported;
                   1091: - major bug is fixed in BACKSPACE intrinsic. It only occurs on large
                   1092: records.
                   1093: * Fri nov 26 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8b (RPL/2)
                   1094: - minor bug is fixed in IP intrinsic: when argument was real without
                   1095: fraction part, IP returned a real, not an integer;
                   1096: - minor bug is fixed in recherche_type(): it is now possible
                   1097: to enter +++<NB3 + return. RPL/2 returns a syntax error, not a acces
                   1098: violation;
                   1099: - MCLRIN (MacLaurin series) intrinsic is added;
                   1100: - TAYLR (Taylor series) instrinsic is added;
                   1101: - very minor bug is fixed in evaluation(). Sometimes, when evaluation()
                   1102: is stopped by ^C, EXIT intrinsic did not work due to a mistake in
                   1103: the internal system stack;
                   1104: - minor bug is fixed in encart.c. System error messages returned by
                   1105: this subroutine were only available in french;
                   1106: - internal RPL/2 system stack corruption is fixed. This bug only affects
                   1107: interactive and debug modes when evaluation routine returns an error;
                   1108: - symbolic derivation subroutine is now able to derivate functions;
                   1109: - minor bug is fixed in instruction_multiplication: now 'X' 1. * returns
                   1110: 'X' and not 'X*1'.
                   1111: * Thu nov 18 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8a (RPL/2)
                   1112: - ctags in src/Makefile.am is fixed;
                   1113: - first derivation subroutines are written;
                   1114: - major bug is fixed in analyse_algebrique() :
                   1115: before this patch, '3-5+4' was understand as '3-(5+4)' !
                   1116: - instruction_division() is improved and returns 0 when it evaluates
                   1117: '0/X';
                   1118: - instruction_moins() is improved and returns 'NEG(X)' when it evaluates
                   1119: '0-X'.
                   1120: * Fri nov 5 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8 (RPL/2)
                   1121: - interface_gnuplot is modified and do not use any deprecated gnuplot
                   1122: commands. Warning, you must use gnuplot 4.0;
                   1123: - graphic output is improved. Now, it is possible to use two separated
                   1124: scales on the same 2D graph (with "main" and "auxiliary" option of SCALE
                   1125: intrinsic). For example:
                   1126: 
                   1127: #!/usr/local/bin/rpl -c
                   1128: 
                   1129: TEST
                   1130: <<
                   1131:    'X' indep
                   1132:    { X Y } autoscale
                   1133:    'SIN(X)' steq draw
                   1134:    { "auxiliary" } axes
                   1135:    { X Y } autoscale
                   1136:    'COS(X)+2' steq draw
                   1137:    { { "ticsonly" "automatic" } { "ticsonly" "automatic" } } axes
                   1138:    drax persist
                   1139: >>
                   1140: 
                   1141: - a major bug is fixed in encart.c;
                   1142: - ncurses is patched.
                   1143: * Mon nov 1 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7o (RPL/2)
                   1144: - configure script is updated;
                   1145: - splash screen is added;
                   1146: - minor bug is fixed in SYSEVAL (only occurs with SIGINT signal).
                   1147: * Sun oct 24 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7n (RPL/2)
                   1148: - stack overflows are caught.
                   1149: * Fri oct 8 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7m (RPL/2)
                   1150: - minor bug is fixed in both << and >> intrinsics. It only occurs when
                   1151: "<<" HELP or ">>" help is called;
                   1152: - DFT and IDFT are added;
                   1153: - minor bug is fixed in FFT (explicit length has to be positive);
                   1154: - MOD can be used with vectors and matrices arguments;
                   1155: - major bugs are fixed in FFT and IFFT (trouble in the computation of the
                   1156: default length of FFT). Only occur with matrices.
                   1157: * Sat aug 14 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7l (RPL/2)
                   1158: - readline is upgraded to 5.0;
                   1159: - gsl is upgraded to 1.5;
                   1160: - corrections in HELP functions.
                   1161: * Fri aug 7 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7k (RPL/2)
                   1162: - HELP is added;
                   1163: - statistic matrix SIGMA is renamed as SDAT;
                   1164: - rpl.h is modified to workaround a bug in Cygwin environment
                   1165: (SA_NOMASK is not defined in include files);
                   1166: - overflows are tested in HMS+ and HMS-;
                   1167: - CEIL, FLOOR and IP are modified to return a correct result with huge
                   1168: arguments that cannot be stored as integers;
                   1169: - fix a minor bug in ->LIST. The LAST stack now contains all arguments
                   1170: of this intrinsic;
                   1171: - flag 32 is used with DISP;
                   1172: - major bug is fixed in ->Q intrinsic (type of argument and memory leak).
                   1173: * Fri may 21 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7j (RPL/2)
                   1174: - major bug is fixed in analyse(). CHR intrinsic cannot be called because
                   1175: I have erased a 'break' in a case statement;
                   1176: - major bug is fixed in AXES intrinsic. It only occurs when AXES is used
                   1177: with "main" or "auxiliary" option;
                   1178: - major bug is fixed in recherche_types(). With this patch, 'sin(X)' is
                   1179: now well analysed as 'SIN(X)'.
                   1180: * Thu apr 22 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7i (RPL/2)
                   1181: - major bug is discovered and fixed in formateur(). It only occurs when
                   1182: an algebraic expression is displayed with '='. In some cases, parenthesis
                   1183: are missing. Same fix in formateur_fichier();
                   1184: - a minor bug is fixed in evaluation.c that does not return any error when
                   1185: it tries to execute 'a=z' e = ;
                   1186: - new code is written in each intrinsic functions to return their required
                   1187: arguments.
                   1188: * Sun apr 14 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7h (RPL/2)
                   1189: - a minor bug is fixed in recherche_type: 1.E90 is now a real;
                   1190: - minor bug is fixed in formateur_reel(). It only occurs in STD mode:
                   1191: 1E90 was printed as 1.00000000000000E90;
                   1192: - HELP is added;
                   1193: - formateur() is fixed to properly print matrices and lists;
                   1194: - a lot of warnings due to deprecated syntax are fixed;
                   1195: - DFT is modified but not usable;
                   1196: - cosmetic bug is fixed in formateur_tex.c;
                   1197: - minor bug is fixed in FFT intrinsic (segfault when FFT is called without
                   1198: any argument).
                   1199: * Sun Jan 25 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7g (RPL/2)
                   1200: - included ncurses is updated to 5.4;
                   1201: - included units is updated to 1.83c;
                   1202: - major bug is fixed in recherche_type() function. With this bug, RPL/2
                   1203: prints 'A/INV(Z+E)+R' when you enter A Z E + inv R + /;
                   1204: - DFT intrinsic is added. It returns the discrete Fourier transform of an
                   1205: array. When the length of each line is 2**n, the result is the same as
                   1206: the result of FFT;
                   1207: - minor bug is discovered and fixed in PUT and PUTI intrinsics when these
                   1208: instructions verify arguments types. It does not affect the result when
                   1209: all arguments are correct.
                   1210: * Sun Oct 19 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7f (RPL/2)
                   1211: - major bug is fixed in evaluation of both EXIT and CYCLE intrinsics. Now,
                   1212: EXIT can be used (as ABORT and KILL) to quit interactive mode of RPL/2;
                   1213: - units is updated to 1.83a release;
                   1214: - formateur_fichier.c is modified to handle unformatted files. This task
                   1215: is not completed.
                   1216: * Mon Aug 25 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7e (RPL/2)
                   1217: - CLUSR is written. It purges all global variables;
                   1218: - BESSEL intrinsic is fixed to allow the use of expressions as arguments;
                   1219: - a major bug was introduced with rpl-4.00pre7d in formateur.c. It appears
                   1220: when an algebraic expression is displayed or printed but does not affect
                   1221: computations. It is now fixed;
                   1222: - gsl is upgraded to 1.4.
                   1223: * Mon Aug 18 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7d (RPL/2)
                   1224: - algebraic expressions are now more readable when they are displayed
                   1225: (less parenthesis);
                   1226: - rplpp is modified to workaround a mistake in 'which' function (seems to appear
                   1227: on Debian distribution, but since cpp is in the default path, RPL/2 works
                   1228: fine...);
                   1229: - NOT is not correctly formatted in formateur.c:
                   1230: Z NOT -> 'NOT Z' but 'A+Z' NOT -> 'NOT A+Z' and 'NOT Z+A' -> 'NOTZ+A'
                   1231: with a NOTZ function !
                   1232: * Sun Aug 10 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7c (RPL/2)
                   1233: - CYCLE is fixed. Now, it is possible to use CYCLE in an expression even
                   1234: if the main loop is in a program;
                   1235: - RPL/2 is tested with efence and valgrind;
                   1236: - configure.in script is modified;
                   1237: - units.c is modified to be built by gcc-3.3. I only have removed a #if 0/#endif
                   1238: structure. I don't know why this code was compiled by gcc-3.3... Maybe
                   1239: another gcc bug...
                   1240: * Fri Jul 25 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7b (RPL/2)
                   1241: - EXIT is fixed. Now, it is possible to use EXIT in an expression when the
                   1242: main loop is in a program;
                   1243: - RPL/2 can take its arguments (and command) on the standard input. Try
                   1244: echo "1 2 3 + *" | rpl -i | grep "^1:" | cut -d ':' -f2
                   1245: - a minor bug in vim syntax file is fixed (CYCLE and EXIT intrinsics);
                   1246: - a minor bug is discovered in analyse_algebrique(). Now, expression
                   1247: such as 'A+Z AND 2' or '(A+Z) AND 2' are correctly parsed.
                   1248: * Mon Jun 16 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7a (RPL/2)
                   1249: - Major bug is fixed in evaluation subroutine. This one only occurs
                   1250: when an error in a user definition called by an expression is caught
                   1251: by an IFERR structure;
                   1252: - EXIT intrinsic can now be used in DO/UNTIL/END or WHILE/REPEAT/END loops;
                   1253: - sequenceur() is now uninterruptible with STOP signal in recherche_type()
                   1254: subroutine;
                   1255: - major bug is fixed in types.c (# xxxxxb) and recherche_instruction_suivante();
                   1256: - GSL exception (underflow) is now caught;
                   1257: - tools/Makefile.am is fixed;
                   1258: - Debian buildpackage script is fixed.
                   1259: * Tue Jun 10 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7 (RPL/2)
                   1260: All memory leaks issued from the pre6 beta releases seem to be fixed.
                   1261: Build process is improved and vim syntax file and manual pages are updated.
                   1262: * Mon Jun 9 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6l (RPL/2)
                   1263: - RCI and RCIJ intrinsic are added;
                   1264: - BESSEL intrinsic is added. Syntax:
                   1265: 3: type ("J", "K", "I", "Y", "j", "k", "i", "y")
                   1266: 2: order (integer or real)
                   1267: 1: x;
                   1268: - ->Q intrinsic is added;
                   1269: - major bug is fixed in C->R intrinsic;
                   1270: - ROW+ and ROW- are added and tested;
                   1271: - COL+ and COL- are added and tested. Syntax:
                   1272: 3: matrix
                   1273: 2: integer (number of column to be inserted)
                   1274: 1: column matrix to be inserted;
                   1275: - major bug was discovered in interface_gnuplot(). It only occurs when
                   1276: the subroutine reduces the graphical depth. It is now fixed;
                   1277: - Some mistakes are been fixed in vim syntax file;
                   1278: - SX2, SY2 and SXY are added;
                   1279: - SX and SY statistical intrinsics are added;
                   1280: - DEBIAN control file is fixed;
                   1281: - PAPER intrinsic is added. Supported paper formats are now : a4, a5, b5,
                   1282: letter, legal, executive;
                   1283: - PPAR is modified to include current graphic type.
                   1284: * Sun Jun 1 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6k (RPL/2)
                   1285: - SLICESCALE intrinsic is added. Its syntax is
                   1286: { "automatic" nb_of_levels }
                   1287: { "discrete" l1 l2 l3 ... }
                   1288: { "incremental" start incr }
                   1289: { "incremental" start incr end }
                   1290: { "automatic" } (default);
                   1291: - a minor bug (in last stack) is fixed in AXES intrinsic
                   1292: - flag 52 is used to automatically update graphics;
                   1293: - man pages are updated;
                   1294: - evaluation() is modified to perform evaluation of expressions that contain
                   1295: '=';
                   1296: - a minor bug is fixed in AXES intrinsic;
                   1297: - a minor bug is fixed in DRAW intrinsic (2D and 3D graphics were able to
                   1298: appear on the same figure). The same mistake is fixed in DRWS intrinsic;
                   1299: - LAST is disabled in evaluation subroutine (EVAL and ->NUM intrinsics).
                   1300: * Sun May 18 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6j (RPL/2)
                   1301: - SLICE intrinsic is added. It is used to draw 3D graphics as contour lines;
                   1302: - PLOTTER is added to draw statistical clouds with lines;
                   1303: - C and H source files now include vim parameters;
                   1304: - vim syntax file is modified to include new intrinsics;
                   1305: - static archive is modified to include all required libraries needed by
                   1306: RPL/2.
                   1307: * Sun May 4 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6i (RPL/2)
                   1308: - '=' is added and tested;
                   1309: - XCOL and YCOL are added;
                   1310: - a minor bug in analyse_syntaxique() is fixed;
                   1311: - THEN is modified to return an error when ELSE appears in a CASE/THEN/END
                   1312: structure. ELSE is modified to return an error when ELSE appears in
                   1313: an ELSE/END structure;
                   1314: - a major bug is fixed in CYCLE;
                   1315: - EXIT is written. When EXIT appears in a defined loop (FOR or START), the
                   1316: sequencer continues after the end of this loop;
                   1317: - SCLS is added;
                   1318: - DRWS now uses COLS to draw 2D graphics;
                   1319: - PPAR and SPAR are written. SPAR returns a list that contains the
                   1320: size of the statistical matrix (or "UNAVALAIBLE" if there is any
                   1321: statistical variable, or "DISABLED" if its type is not one of the type of
                   1322: a statistical matrix.) and XCOL and YCOL parameters. Warning: [[]] SIZE
                   1323: returns { 1 0 } and it is not a bug, because a null matrix contains _one_
                   1324: null line ! Thus, [[]] STOS SPAR returns { { 1 0 } 1 2 };
                   1325: - EXTERNAL intrinsic is added. Warning: by default, extern functions are
                   1326: disabled. Arguments of EXTERNAL are case sensitive because the external
                   1327: interface is written in C. { ext_sinus } EXTERNAL does not replace the list
                   1328: of known external functions but add the new list to the last. { "all" }
                   1329: EXTERNAL allows all external functions and { "none" } EXTERNAL removes all
                   1330: external names of the known functions;
                   1331: - mkrplso.in is modified.
                   1332: * Sun Apr 20 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6h (RPL/2)
                   1333: - vim syntax file is upgraded;
                   1334: - a minor mistake is fixed in recherche_instruction_suivante();
                   1335: - some minor memory leaks are fixed in recherche_type() function. They only
                   1336: occurs when a syntax error is detected;
                   1337: - #error and #warning preprocessor macros are added;
                   1338: - INCR and DECR are written (with integer or variable argument);
                   1339: - CSWP and RSWP are added and tested;
                   1340: - a minor bug is fixed in analyse.c;
                   1341: - DEBIAN/control is added to build debian package;
                   1342: - SCALE is fixed and improved ("automatic" keyword);
                   1343: - PUTC and PUTR new intrinsics are added.
                   1344: * Sun Apr 13 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6g (RPL/2)
                   1345: - a very minor bug is fixed in VISIT intrinsic. It only occurs when
                   1346: VISIT does not find a name in level 1;
                   1347: - configure.in script is modified to add a new test (--enable-debug
                   1348: flag). Configured with this fleg, RPL/2 will be built with electric-fences;
                   1349: - GETR (get row[s]) and GETC (get column[s]) are added. These new instructions
                   1350: extract a part of a matrix. Syntax: [[ 1 2 3 ][ 2 3 4 ]] { 1 } GETR or
                   1351: 'MATRIX' { 2 2 3 } GETR;
                   1352: - LOGSCALE intrinsic is improved and now, it can be used as
                   1353: { "main" "auxiliary" X Y } LOGSCALE;
                   1354: - SCALE intrinsic is used to fix the limits of a graphic. Its syntax is the
                   1355: same than AXES:
                   1356: { { 60 "ticsonly" 2 } { "automatic" "ticsonly" 10 } } axes
                   1357: { "auxiliary" { 60 "ticsonly" "default" } { "automatic" } } axes
                   1358: { { -10 10 } "automatic" } SCALE.
                   1359: Warning, it is not possible to ask a logarithmic scale with this intrinsic
                   1360: because it changes only the dimension of the screen. To have a logarithmic
                   1361: scale, you must use LOGSCALE intrinsic:
                   1362: { X } LOGSCALE gives a semi-log screen, { "auxiliary" X Y } gives a log-log
                   1363: screen on second scale;
                   1364: - { X X } autoscale and { Y Y } logscale are now invalid;
                   1365: - *D is added (depth multiplication, for 3D graphics);
                   1366: - a new intrinsic (*S) is added. It changes the scale of a graphic (X, Y
                   1367: and Z axes). The result of *S is the same than DUP DUP *H *W *D;
                   1368: - a major bug is fixed in GETI instrinsic when it is used with a name
                   1369: that contains a matrix or a vector (bad upper bounds conditions in
                   1370: incrementation);
                   1371: - DISP intrinsic now uses the 33-th flag. When it is not set
                   1372: (default), a final carriage return is sent to the terminal;
                   1373: - AXES intrinsic only takes a list that can contains the keywork
                   1374: "main" or "auxiliary". Before this modification, this keyword was in
                   1375: the first stack level;
                   1376: - vim syntax file is upgraded;
                   1377: - in appel_gnuplot(), stdin is closed when gnuplot is called with -raise
                   1378: option;
                   1379: - LAST is now disabled in the main loop of INT intrinsic;
                   1380: - expm1 and lnp1 are rewritten to use expm1 and log1p from math.h.
                   1381: * Sun Apr 6 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6f (RPL/2)
                   1382: - a major bug is fixed in evaluation() subroutine. It occurs with DRAW
                   1383: intrinsic when the equation cannot be evaluated (for example 'SIN(X)/X'
                   1384: in 0);
                   1385: - LAST is disabled in the main loop of DRAW intrinsic;
                   1386: - a major bug is fixed in DRAW intrinsic. When an error occurs in the
                   1387: evaluation of an equation, the system stack is returned corrupted to the
                   1388: sequencer;
                   1389: - the same minor bug is fixed in FOR and START. It only occurs when the limits
                   1390: of a loop are not integer or real.
                   1391: * Sun Mar 31 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6e (RPL/2)
                   1392: - the compilation stage aborts with an error message when two definitions
                   1393: have the same name. To improve the compilation() subroutine, I have to
                   1394: add some tests in gestion_variables.c;
                   1395: - recherche_type() subroutine ad some other connex subroutines are improved.
                   1396: Now, some syntax errors about object are caught and do not perform sequencer
                   1397: hangup;
                   1398: - readline is upgraded (minor compilation bug with recent gcc);
                   1399: - Makefile.am's and configure.in scripts are improved.
                   1400: * Fri Mar 14 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6d (RPL/2)
                   1401: - DRWS intrinsic is written. Two datastyles are associated: SCATTER (2D
                   1402: and 3D) and HISTOGRAM (only 2D, but 3 columns are accepted, the third shown
                   1403: the boxwidth, 1 by default);
                   1404: - recherche_type() is rewritten to be faster;
                   1405: - gsl is upgraded (release 1.3);
                   1406: - ncurses is upgraded and patched (release 5.3);
                   1407: - recherche_instruction_suivante() is fixed (string research with included
                   1408: '"') and rewritten to be faster;
                   1409: - appel_gnuplot() is fixed. When no graphic was available, it returned a
                   1410: segfault.
                   1411: * Sun Mar 9 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6c (RPL/2)
                   1412: - RPL/2 is compiled by gcc-3.2.2 and seems to work;
                   1413: - the same minor bug is fixed in REDRAW and DRAX functions;
                   1414: - a minor fix is written in DRAW function (2D and 3D);
                   1415: - AXES intrinsic is improved. Now { { pi "ticsonly" 4 } "automatic" } DRAX
                   1416: is accepted;
                   1417: - a minor bug is fixed in VISIT intrinsic.
                   1418: * Sun Jan 26 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6b (RPL/2)
                   1419: - a minor bug is fixed in evaluation subroutine;
                   1420: - vim syntax file is improved;
                   1421: - DRAW (wireframe section) is fixed. When an error occurs in the evaluation
                   1422: of a 3D-graphic (for example 'SIN(R)/R' with 'R=SQRT(X**2+Y**2)' in X=0 and
                   1423: Y=0), no graph was procuced (it results from a bug in gnuplot, and this fix
                   1424: is a quick and dirty workaround...);
                   1425: - RETURN intrinsic is modified to fix a trouble in interactive mode;
                   1426: - rplconvert is improved.
                   1427: * Sun Dec 22 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6a (RPL/2)
                   1428: - a memory leak is fixed in formateur.c that only occurs when RPL/2 try
                   1429: to print a list that contains a name;
                   1430: - a major bug is fixed in -> intrinsic that only occurs in evaluation case with
                   1431: a algebraic expression (<< 1 -> X 'X+1' >> eval);
                   1432: - vim syntax file is improved;
                   1433: - RPL/2 can now be built by gcc 3.2.1;
                   1434: - "**" can be used in algebraic expression;
                   1435: - DRAW can now plot wireframe (3D) graphics.
                   1436: * Sun Dec 8 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6 (RPL/2)
                   1437: - ncurses is patched to be compiled by gcc 3.2;
                   1438: - purification_chaine is rewritten to fix a major bug (when 'chaine' is empty);
                   1439: - a major bug is fixed in recherche_instruction_suivante();
                   1440: - minor bug is fixed in rpl-core file. The error message is now correctly
                   1441: written;
                   1442: - minor bug is fixed in analyse_notation_algebrique.c and types.c.
                   1443: Now, an expression such as 'A+' returns an error when it is analyzed;
                   1444: - VISIT intrinsic is added;
                   1445: - a major memory leak is fixed in evaluation.c. This bug rarely occurs in
                   1446: normal mode.
                   1447: * Sun Aug 25 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5e (RPL/2)
                   1448: - an EDIT intrinsic is added;
                   1449: - PRMD intrinsic returns french or english messages;
                   1450: - rpl-core now call LAST intrinsic if the last stack is avalaible. It
                   1451: contains the error message too;
                   1452: - new syntax, ftplugin and indent files are written for vim text editor;
                   1453: - major bug is found and fixed in RCL intrinsic;
                   1454: - major bug is found and fixed in OR intrinsic.
                   1455: * Mon Jul 29 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5d (RPL/2)
                   1456: - ncurses is updated;
                   1457: - minor bug is fixed on PURGE instruction (an error no caught was
                   1458: returned in interactive mode).
                   1459: * Mon Jul 21 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5c (RPL/2)
                   1460: - ASL (arithm. shift left) is added.
                   1461: * Thu Jul 11 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5b (RPL/2)
                   1462: - ncurses is patched;
                   1463: - gsl is added to perform arithmetic operations;
                   1464: - units is patched;
                   1465: - some very minor bugs have been fixed.
                   1466: * Wed May 15 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5a (RPL/2)
                   1467: - ncurses is patched;
                   1468: - RPL/2 can now be built by gcc 3.1;
                   1469: - RDZ is fixed (minor bug).
                   1470: * Sun Apr 21 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5 (RPL/2)
                   1471: - RPL/2 can now be called from other languages (librpl libraries).
                   1472: * Sun Mar 24 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4h (RPL/2)
                   1473: - ERRN and ERRM can now be used with errors returned by external functions;
                   1474: - readline and ncurses have been updated;
                   1475: - no more bugs have been reported since the rpl-4.00pre4g release.
                   1476: * Wed Feb 20 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4g (RPL/2)
                   1477: - ERRN and ERRM intrinsic functions are written. They return the last
                   1478: error number or message even if errors are caught by an IFERR structure;
                   1479: - a minor bug is fixed in EPSILON intrinsic. Now, 'EPSILON(0)' returns
                   1480: a non null value;
                   1481: - Ncurses is updated.
                   1482: * Mon Feb 18 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4f (RPL/2)
                   1483: Arithmetic intrinsic instructions (- +, -, *, / and **) are improved :
                   1484: 'X' 0 + and 0 'X' + return 'X';
                   1485: 'X' 0 - returns 'X';
                   1486: 'X' 1 * and 1 'X' * return 'X';
                   1487: 'X' 0 * and 0 'X' * returns 0; 
                   1488: 'X' 1 / returns 'X';
                   1489: 'X' 1 ** returns 'X';
                   1490: 'NEG(X)' NEG returns 'X';
                   1491: - autoconf/automake scripts are improved: now, the size of the different types
                   1492: found by configure are used in rpltypes.h (rplconfig.h is written by configure);
                   1493: - rdynamic flag is added in src/Makefile.am. This flag is used in the first
                   1494: makefile, but forgotten in the new process;
                   1495: - Flag 31 is tested before saving any arguments in bibliotheques_externes.c;
                   1496: - POS can now be used on lists;
                   1497: - ELSILON is written. This function returns the smallest real e(x) such as
                   1498: e+abs(x) != abs(x).
                   1499: * Mon Feb 11 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4e (RPL/2)
                   1500: - now, INT intrinsic function can be interrupted;
                   1501: - precision of sommation_vecteur_xxx() subroutines is improved;
                   1502: - new vim syntax file written for vim 6.0.
                   1503: * Mon Feb 04 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4d (RPL/2)
                   1504: - explicit error messages are now printed when the RPL/2 is used in
                   1505: interactive mode;
                   1506: - major bug is fixed in OPEN intrinsic: with 'REPLACE' status, file lock was
                   1507: tested after the file is opened, thus, when the file was locked, it was
                   1508: deleted too!;
                   1509: - configure script is improved (and it seems to be good ;-) );
                   1510: - An --disable-experimental flag is added to the configure script. Thus, even
                   1511: if you compile a beta release, you can compile a stable RPL/2;
                   1512: - new syntax and ftplugin written for vim 6.0.
                   1513: * Wed Jan 30 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4c (RPL/2)
                   1514: - configure script is improved.
                   1515: * Sun Jan 27 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4b (RPL/2)
                   1516: - ncurses now replaces termcap;
                   1517: - CŰme DESPLATS has written a configure script.
                   1518: * Fri Jan 18 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4a (RPL/2)
                   1519: - KIND is added and returns the type of the numerical argument ;
                   1520: - history file is added.
                   1521: * Tue Jan 15 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4 (RPL/2)
                   1522: - Stable release. Unformatted files are disabled in this release.
                   1523: * Mon Jan 14 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3h (RPL/2)
                   1524: - SIGTSTP (CTRL+Z) is added. In a script, a SIGTSTP signal signifies
                   1525: that the RPL/2 seqencer must stop and must give a prompt. This
                   1526: signal is an asynchonous "HALT" command;
                   1527: - SIGINT (CTRL+C) variables stack corruption is fixed;
                   1528: - IFERR seems to be fixed (in equation evaluation routine);
                   1529: - Memory leak is fixed (ADR object type);
                   1530: - DATE returns both date and hours;
                   1531: - TIME now returns user and system CPU times;
                   1532: - MEM is added.
                   1533: * Thu Jan 10 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3g (RPL/2)
                   1534: - Makefile is improved to support sparc v7 (sun4c), sparc v8 (sun4m) and
                   1535: sparc v9 (sun4u). Now, RPL/2 can be built on i386 (i486 is known as i386),
                   1536: i586, i686, K6, K7, alpha ev4, alpha ev5, alpha ev56, alpha ev6, sparc v7,
                   1537: sparc v8 and sparc v9. Compilation of RPL/2 on my Sun Sparc 2 (sun4c,
                   1538: CPU 4/75, 64 MB, 40 MHz with FPU) is a very great mission :
                   1539: 
                   1540: Newton:[~/rpl/rpl] > time make install
                   1541: ...
                   1542: real    338m39.623s
                   1543: user    324m32.290s
                   1544: sys     10m47.380s
                   1545: Newton:[~/rpl/rpl] >
                   1546: 
                   1547: I don't know if you will compile this language on old worstations, but
                   1548: it is usable ;-) ;
                   1549: - SYSEVAL is improved. An external program can be called without any shell.
                   1550: Thus, even if the sticky bit is set, RPL/2 can not give a shell root when
                   1551: a SYSEVAL command crashes;
                   1552: - minor bug is fixed in recherche_type() (# xxxxb parsing);
                   1553: - presence of bootstrap entry point is verified before launching the
                   1554: sequencer;
                   1555: - minor bug is fixed in formateur_tex() (underscore in mathematical
                   1556: expression);
                   1557: - Lapack is updated.
                   1558: * Thu Jan 3 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3f (RPL/2)
                   1559: - IFERR is now known in an expression, but not usable.
                   1560: * Mon Dec 31 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3e (RPL/2)
                   1561: - several bugs are fixed.
                   1562: * Mon Dec 17 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3d (RPL/2)
                   1563: - major bugfix in file locking.
                   1564: * Fri Dec 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3c (RPL/2)
                   1565: - minor fixes is system() call.
                   1566: * Fri Nov 30 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3b (RPL/2)
                   1567: - automatic limitation of the graphical depth due to a limitation (bug ?)
                   1568: of gnuplot.
                   1569: * Mon Nov 19 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3a (RPL/2)
                   1570: - new file temp management.
                   1571: * Sun Nov 18 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3 (RPL/2)
                   1572: - memory leak is fixed in STO instruction;
                   1573: - minor bug in file management is fixed;
                   1574: - BACKSPACE is added;
                   1575: - VARS is added;
                   1576: - file locks are improved.
                   1577: * Wed Nov 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2l (RPL/2)
                   1578: - major bug is fixed (on sparc architecture) and RPL/2 can now run
                   1579: on sparc stations;
                   1580: - INDEP and DEPND are improved;
                   1581: - AXES is added;
                   1582: - WRITE, APPEND and REWIND are added.
                   1583: * Sun Nov 11 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2k (RPL/2)
                   1584: - write is improved ;
                   1585: - major bug is found and fixed in copie_objet() with struct_fichier;
                   1586: - minor bug is fixed in OPEN function;
                   1587: - minor bug is fixed in analyse_syntaxique() subroutine. All commands
                   1588: are analysed before starting their executions.
                   1589: * Thu Nov 8 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2j (RPL/2)
                   1590: - minor bug is fixed in appel_gnuplot();
                   1591: - RPL/2 can work without LANG variable.
                   1592: * Wed Oct 31 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2i (RPL/2)
                   1593: - WAIT function is improved (removing the polling function);
                   1594: - LAST stack is not active (default) when rpl is called without the option -i.
                   1595: In all other cases, LAST stack is active;
                   1596: - Labels can be added on a gnuplot output (function LABEL);
                   1597: - LCD-> and ->LCD are added.
                   1598: * Sun Oct 21 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2h (RPL/2)
                   1599: - minor bug is fixed in TeX output (pi);
                   1600: - new english manual is added.
                   1601: * Wed Oct 16 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2g (RPL/2)
                   1602: - LOCK, WFLOCK and UNLOCK are added. A file is locked when it is opened;
                   1603: - VERSION function is added. It returns the version number of the interpreter;
                   1604: - minor bug is fixed in evaluation subroutine;
                   1605: - english error messages are been fixed.
                   1606: * Tue Oct 09 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2f (RPL/2)
                   1607: - interrupt subroutine is added;
                   1608: - formatted files support is continued.
                   1609: * Sun Sep 30 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2e (RPL/2)
                   1610: - formateur_fichier.c is added to perform formatted files write.
                   1611: * Thu Sep 27 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2d (RPL/2)
                   1612: - minors bugfixes in FIX format in formateur_reel() subroutine;
                   1613: - new manual page in english;
                   1614: - FORMAT intrinsic is added and can read any format for "formatted" file.
                   1615: * Sun Sep 23 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2c (RPL/2)
                   1616: - OPEN, CLOSE, SYNC, INQUIRE, CREATE and DELETE are tested;
                   1617: - a man page in the first manual section is written.
                   1618: * Thu Sep 20 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2b (RPL/2)
                   1619: - major bugfixes in recherche_type() subroutine: sometimes in interactive mode,
                   1620: this routine was be able to forget the last element of a list, a vector or
                   1621: a matrix.
                   1622: * Mon Sep 17 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2a (RPL/2)
                   1623: - OPEN, CLOSE and DELETE are known by the language but not very usable;
                   1624: - minor bugfixes in evaluation routine.
                   1625: * Sun Sep 16 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2 (RPL/2)
                   1626: - major bugfixes in evaluation routine.
                   1627: * Sat Sep 15 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1d (RPL/2)
                   1628: - conditional structures can be used in equations.
                   1629: * Fri Sep 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1c (RPL/2)
                   1630: - Minor bugfixes in makefile.
                   1631: * Sat Sep  8 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1b (RPL/2)
                   1632: - CONVERT is written;
                   1633: - CYCLE, FOR/NEXT, FOR/STEP, START/NEXT, START/STEP, DO/UNTIL/END and
                   1634: WHILE/REPEAT/END can now be used in an equation;
                   1635: - I fix some troubles with evaluation subroutine;
                   1636: - db3 library is added.
                   1637: * Thu Sep  6 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1a (RPL/2)
                   1638: - add rplconvert and rplunits sources;
                   1639: - add CONVERT definition (but it does not work).
                   1640: * Mon Sep  3 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1 (RPL/2)
                   1641: - initial public release (GPL).
                   1642: * Thu Apr  2 1998 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre0 (RPL/2)
                   1643: - RPL is rewritten from scratch and named RPL/2.
                   1644: #* 1992 BERTRAND JoŽl rpl-3.02 (RPL-387)
                   1645: #- minor bugfixes.
                   1646: #* 1991 BERTRAND JoŽl rpl-3.01 (RPL-387)
                   1647: #- arithmetic processor support is added to improve global performances.
                   1648: #* 1991 BERTRAND JoŽl rpl-3.00 (RPL-386)
                   1649: #- idem... but on an i386DX...
                   1650: #* 1990 BERTRAND JoŽl rpl-2 (RPL-6809)
                   1651: #- a new release on a more powerfull processor and with new functions and an
                   1652: #built-in editor. It has been written on a SMT-Goupil G3-6809 running
                   1653: #Flex9 (320 KB of RAM and a graphic card used to draw 512*256 graphics in
                   1654: #8 colors)
                   1655: #* 1989 BERTRAND JoŽl rpl-1 (RPL-6502)
                   1656: #- initial release (only an historic interest) written on an ORIC Atmos 48K.
                   1657: #No graphic was provided.

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