Annotation of rpl/ChangeLog, revision 1.27

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

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