Annotation of rpl/ChangeLog, revision 1.64

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

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