Annotation of rpl/ChangeLog, revision 1.169

1.169   ! bertrand    1: * Wed Mar 27 2013 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.13 (RPL/2)
        !             2: - integer overflows have been fixed (NEG, ABS, minus);
1.168     bertrand    3: - global variables can now be recalled from ATEXIT procedure;
1.167     bertrand    4: - ATEXIT registered procedure is now executed even if program is stopped by
                      5: SIGINT;
1.165     bertrand    6: - minor bug is fixed in TOKENIZE intrinsic instruction. TOKENIZE did not work on
                      7: a copy of input string;
1.164     bertrand    8: - major bug (segfault) is fixed in liste_variables(). It only occurs
                      9: when this function is called with shared variables;
1.163     bertrand   10: - all internal data are now stored in 64 bits wide integers (even is 32 bits
                     11: ABI is selected);
1.162     bertrand   12: - major bug is fixed in recherche_instruction_suivante(). In some
                     13: circumstances, this function can return a spurious error;
1.161     bertrand   14: - new NATIVE*(*) data format is added. By default, native*(*) is used
                     15: to write data without precision loss. It can also be used to write
                     16: complex objects like expressions, lists or tables;
1.160     bertrand   17: - major bug is fixed in formateur(). When INT64_MIN was pushed into stack,
                     18: internal value was good but RPL/2 was not able to correctly display
                     19: this value. This bug comes from ABS as ABS(INT64_MIN) cannot be represented
                     20: in integer. All abs(), fabs() and labs() present in source code have ben checked
                     21: to avoid this kind of bug;
1.159     bertrand   22: - unformatted sockets are now usable as unformatted files;
1.158     bertrand   23: - BACKSPACE now runs on unformatted file;
                     24: - major bug is fixed in BACKSPACE that didn't check if '"' characters were
                     25: escaped;
1.157     bertrand   26: - CHARACTER*(n) format now counts escaped characters;
1.155     bertrand   27: - transliteration is avoid in rpl-core file generation to authorize core
                     28: creation even if a transliteration error is caught;
                     29: - major bug is fixed in evaluation(). System stack was not correctly
                     30: destacked when execution error occurs;
1.154     bertrand   31: - major bug is fixed in READ (socket interface);
                     32: - minor bug is fixed in analyse_flux().
1.169   ! bertrand   33: * Wed Feb 27 2013 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.12 (RPL/2)
1.153     bertrand   34: - bug is fixed in recherche_type(). { "\"" } was not evaluated as expected
                     35: as inner quote was not escaped;
1.152     bertrand   36: - CIPHER new intrinsic is added to perform key generation, decryption and
                     37: encryption;
1.151     bertrand   38: - CBC-CMAC digest is added;
1.150     bertrand   39: - HMAC digest is added;
1.149     bertrand   40: - DIGEST intrinsic is added;
1.148     bertrand   41: - signal management is fixed to be usable on NetBSD;
1.147     bertrand   42: - RPL/CAS autoconfiguration is upgraded;
                     43: - sqlite, openssl, giac, gmp ave been upgraded;
1.146     bertrand   44: - SQLITE support is added in SQLQUERY, SQLCONNECT and SQLDISCONNECT.
1.145     bertrand   45: * Tue Dec 18 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.11 (RPL/2)
                     46: - shared variables are now stored in a tree;
                     47: - lapack is upgraded to 3.4.2;
1.142     bertrand   48: - only giac/src is built in rplcas (giac/Makefile.am is modified);
                     49: - gnuplot is upgraded to 4.6.1;
1.141     bertrand   50: - giac, units and ncurses are upgraded;
1.140     bertrand   51: - interprocess capabilities are removed when RPL/2 cannot run its initialization
                     52: routine to keep operating system as clean as possible;
1.139     bertrand   53: - sem_wait() has to catch EINTR in thread_surveillance_signaux();
1.138     bertrand   54: - signal management is rewritten to avoid a strange bug on NetBSD. On NetBSD,
                     55: a signal handler can be called within a special thread and not in the
                     56: calling thread;
1.144     bertrand   57: - static variables are now written in a variables tree;
1.136     bertrand   58: - major bug is fixed in STO intrinsic. STO returns an error when it has
                     59: to create a global variable if intrinsic none (default) is set.
1.134     bertrand   60: * Mon Oct 1 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.10 (RPL/2)
1.133     bertrand   61: - FORALL intrinsic is added;
1.132     bertrand   62: - major bug (deadlock) is fixed in CYCLE. Only occurs when CYCLE is called to
1.133     bertrand   63: interrupt a loop from a subroutine within a compiled programm;
1.131     bertrand   64: - workaround to avoid strange bug on slow network is written in READ
                     65: intrinsic;
                     66: - CRITICAL/END structure is added. When program enters in a critical
                     67: section, all other threads of the same process sleep until program leaves
                     68: critical section.
1.129     bertrand   69: * Wed Aug 22 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.9 (RPL/2)
                     70: - giac is upgraded to 0.9.8;
                     71: - ncurses is patched with last patches;
1.128     bertrand   72: - Sqlite is upgraded to 3.7.13;
                     73: - Units is upgraded to 1.89e;
                     74: - Lapack is upgraded to 3.4.1;
1.127     bertrand   75: - LENGTH*(...) format is fixed;
1.126     bertrand   76: - some patches have been added to build RPL/2 on NetBSD;
1.124     bertrand   77: - escaped characters are fixed in READ and WRITE operations;
1.123     bertrand   78: - major bug is fixed in READ intrinsic (on socket). End of file condition
                     79: was randomly caught on slow network;
1.122     bertrand   80: - stdin can now handle espaced characters strings in SYSEVAL;
1.121     bertrand   81: - --with-gcc-version is added to configure script to force gcc version as
                     82: gfortran 4.7 is broken and crashes with segmentation fault.
1.119     bertrand   83: * Mon May 21 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.8 (RPL/2)
                     84: - POLL now accepts more than one descriptor and returns informations
1.118     bertrand   85: about pollable descriptors;
                     86: - SMPHRTRYDECR now takes timeout value instead of returning when semaphore
                     87: cannot by decremented;
1.117     bertrand   88: - signal handlers are fixed to avoid spurious and very rare deadlocks;
1.116     bertrand   89: - pari is upgraded;
1.115     bertrand   90: - force CFLAGS for tools/file (-O2 -g) to avoid mmap() error;
1.114     bertrand   91: - giac, gmp and mpfr have been upgraded.
1.113     bertrand   92: * Fri Apr 13 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.7 (RPL/2)
1.112     bertrand   93: - double quote is escaped in INPUT and PROMPT intrinsic functions;
1.111     bertrand   94: - error is returned (instead of warning) when unavailable intrinsic function
                     95: is called;
1.110     bertrand   96: - lot of minor bugs have been fixed;
                     97: - ncurses and file are patched;
                     98: - RPL/2 can now be cross compiled (until .deb archive generation);
1.109     bertrand   99: - all table, vector and matrix dimensions are now treated as unsigned long;
1.108     bertrand  100: - recherche_type() function is modified to use cached memory;
                    101: - gnuplot is upgraded to 4.6.0.
1.107     bertrand  102: * Wed Feb 29 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.6 (RPL/2)
                    103: - serial line support is added to OPEN (STTY options);
1.106     bertrand  104: - multiline inputs are allowed:
                    105: schroedinger:[~/cvs/build/src] > rpl -is
                    106: +++RPL/2 (R) version 4.1.6 (Monday 01/30/12, 10:20:38 CET)
                    107: +++Copyright (C) 1989 ŗ 2011, 2012 BERTRAND JoŽl
                    108: 
                    109: +++Ce logiciel est un logiciel libre sans aucune garantie de fonctionnement.
                    110: +++Pour plus de dťtails, utilisez la commande 'warranty'.
                    111: 
                    112: RPL/2> [[ 1 2 3 ]
                    113: + 001> [ 4 5 6 ]
                    114: + 002> [ 7 8 9 ]]
                    115: 
                    116: 1: [[ 1 2 3 ]
                    117:     [ 4 5 6 ]
                    118:     [ 7 8 9 ]]
                    119: RPL/2> [[ 1 23 ]
                    120: + 001> [ 4 5 6 ]]
                    121: +++Erreur : Erreur de syntaxe [19267]
                    122: 
                    123: 1: [[ 1 2 3 ]
                    124:     [ 4 5 6 ]
                    125:     [ 7 8 9 ]]
                    126: RPL/2> [ 1 2 3
                    127: + 001> annulation
                    128: RPL/2> abort
                    129: 
                    130: 'annulation' is done by pressing CTRL+g, and abort by CTRL+d on empty line.
1.104     bertrand  131: * Tue Jan 17 2012 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.5 (RPL/2)
                    132: - ncurses, sqlite and openssl have been upgraded;
1.103     bertrand  133: - major bug is fixed in ** (integer integer **) when first argument is equal to
                    134: -1;
1.102     bertrand  135: - major bug is fixed in signal management. With new signal management, thread or
                    136: process were not signalized anymore by POSIX signals. If a thread or a process
                    137: was sleeping, it was not interrupted;
1.101     bertrand  138: - minor bug is fixed in OPEN intrinsic. Now, when a socket is open, its default
                    139: adress is set to 0.0.0.0;
1.105     bertrand  140: - new rule is added to main makefile (make debian) to build deb package;
1.100     bertrand  141: - new benchmark (Xeon W3520 @ 2.67GHz) :
                    142: schroedinger:[~/cvs/bench] > ./bench.rpl 
                    143: +++RPL/2 (R) version 4.1.5 (Friday 12/02/11, 12:18:23 CET)
                    144: +++Copyright (C) 1989 ŗ 2010, 2011 BERTRAND JoŽl
                    145: Number of scalar operations per second and per core : 3809121.83444626
                    146: schroedinger:[~/cvs/bench] > 
1.99      bertrand  147: - recherche_type() did not convert huge integer in real. Now,
                    148: 18446744072742037448 is converted into real as value cannot be stored in
                    149: RPL/2 integer type;
                    150: - WFSOCK is modified to handle unconnected sockets;
1.98      bertrand  151: - REGEX is added;
1.97      bertrand  152: - RESTART is added (execvp() on main RPL/2 process);
1.95      bertrand  153: - copie_objet() now returns same MTX (struct_mutex) even if caller wait for
                    154: a real copy. Now, struct_mutex contains locks owner. On Linux or Solaris (for
                    155: example), it is possible to lock mutex from a thread and unlock the same mutex
                    156: from another thread. On NetBSD, system crashes.
1.94      bertrand  157: * Mon Nov 21 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.4 (RPL/2)
                    158: - rplcas/@GIAC@/src/config.h is removed to avoid compilation bug. config.h
                    159: written by configure script was overloaded by src/config.h;
1.95      bertrand  160: - lot of compilation warnings have been fixed;
1.94      bertrand  161: - lapack and blas have been upgraded;
1.93      bertrand  162: - ncurses, sqlite and giac have been upgraded;
                    163: - LCASE, UCASE, POS and SUB now handle escape characters;
1.91      bertrand  164: - major bug is fixed in INT (numerical integration was unusable as type
                    165: checking condition was always false);
1.90      bertrand  166: - SIZE, CHR and NUM can handle strings with escape characters;
1.89      bertrand  167: - lot of patches for Android and OS/2;
                    168: - configure.ac is improved to remove operating systems special cases.
1.88      bertrand  169: - major bug is fixed in DRWS (SDAT was not used...);
                    170: - lists, and integer, real and complex numbers can now be written in
                    171: unformatted files;
                    172: - rplawk makefile is fixed to avoid build process bug. Warning, with these
                    173: modifications, sources tree has to be writable.
1.86      bertrand  174: * Wed Sep 21 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.3 (RPL/2)
1.85      bertrand  175: - Linux port, MacOS X port and xBSD ports are tested and fully fonctionnal;
1.84      bertrand  176: - libsigsegv is added;
                    177: - OpenMotif is added;
                    178: - all internal signal handlers are rewritten to avoid POSIX signal usage
                    179: and to be async signal safe;
1.83      bertrand  180: - SIGSEGV signal handler is rewritten;
1.80      bertrand  181: - SREV intrinsic is added.
1.79      bertrand  182: * Tue Aug 9 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.2 (RPL/2)
1.81      bertrand  183: - I have fixed a lot of bugs in gpp preprocessor (and sent gpp 3.0 to official
1.78      bertrand  184: gpp developer). Now, macros like
                    185: 
                    186:    #define foo foo bar
                    187: 
                    188: is evaluated without recursion. gpp 2.24 crashed on stack overflow.
1.77      bertrand  189: - LIMIT is added;
1.76      bertrand  190: - Now, undefined values like 'infinity/infinity' are computed. Result is
                    191: undef constant;
1.75      bertrand  192: - infinity constant is added.
1.73      bertrand  193: * Sun Jul 24 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.1 (RPL/2)
1.74      bertrand  194: - VERSION now returns OS type, architecture and ABI;
1.73      bertrand  195: - configure script is updated. New flags :
                    196:     --with-32bits-abi
1.88      bertrand  197:     --with-64bits-abi
                    198:     --with-rplcas
1.73      bertrand  199: Please not that RPL/CAS is not built by default;
1.72      bertrand  200: - Lapack is upgraded to 3.3.1.
1.71      bertrand  201: * Mon Jun 27 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0 (RPL/2)
                    202: - New stable release.
1.70      bertrand  203: * Fri Jun 22 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.4 (RPL/2)
1.71      bertrand  204: - some minor changes have been done in instruction_int() to accept new argument
                    205: types;
                    206: - interface_cas.cpp now catchs exceptions returned by giac.
1.70      bertrand  207: * Fri Jun 24 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.3 (RPL/2)
                    208: - INT intrinsic now uses RPLCAS to compute symbolic integration;
1.69      bertrand  209: - minor bug is fixed in INTRINSIC function. Now, this function gives same
                    210: result with ou without -p switch.
1.68      bertrand  211: * Wed Jun 22 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.2 (RPL/2)
1.67      bertrand  212: - memory caching is added to new variable tree.
1.66      bertrand  213: * Tue Jun 21 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.1 (RPL/2)
                    214: - SPAWN is now usable with new variable management;
1.65      bertrand  215: - MEM is rewritten;
                    216: - PRUSR is rewritten;
                    217: - merge 4_0 branch into HEAD;
                    218: - CLUSR is rewritten;
                    219: - -p flag is now usable;
                    220: - New benchmark:
                    221: cauchy:[~/rpl/bench] > ./bench.rpl 
                    222: +++RPL/2 (R) version 4.1.0.prerelease.1 (lundi 20/06/2011, 23:00:45 CEST)
                    223: +++Copyright (C) 1989 ŗ 2010, 2011 BERTRAND JoŽl
                    224: Number of scalar operations per second and per core : 2625369.22710792
1.64      bertrand  225: * Mon Jun 20 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.1.0.prerelease.0 (RPL/2)
                    226: - New variable management is written. Please note that -p flag does not work
                    227: and all multithread/multitask capabilities have been disabled until this
                    228: new subsystem shall be validated.
                    229: * Thu May 09 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.23 (RPL/2)
                    230: - major bug is fixed in STD format (1E7 sq prints 1);
                    231: - major bug is fixed in READ intrinsic (socket). This bug was introduced
                    232: by a new feature in glibc.
                    233: * Thu Apr 14 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.22 (RPL/2)
                    234: - by default, RPL/2 uses "NONE" IMPLICIT when it's started in batch mode and
                    235: "ALL" IMPLICIT when it runs in interactive mode;
                    236: - when "NONE" IMPLICIT is set, STO intrinsic raises an error when it is used
                    237: to create or modify a global variable. Now, with "NONE" IMPLICIT, you have
                    238: to use SAVE to manipulate global variables;
                    239: - replace erroneous TAB by TBL in evaluation() and formateur_fichier()
                    240: subroutines;
                    241: - fix major memory access violation in evaluation subroutine. Only occurs
                    242: when 'X(i,j)' is evaluated on a matrix and when (i,j) points out of bounds;
                    243: - fix major bug in evaluation subroutine. 'X(i)' returns execution error
                    244: when X was a vector or a table.
1.63      bertrand  245: * Sun Apr 04 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.21 (RPL/2)
                    246: - Gnuplot is upgraded;
1.62      bertrand  247: - flag 34 is now used to enable or disable control character evaluation;
                    248: - major bug is fixed in P->R intrinsic function when argument type is
                    249: complex and degree mode is set;
                    250: - L->T and T->L are added;
1.63      bertrand  251: - OLD filetype is fixed;
1.61      bertrand  252: - FLOW socket support is added;
                    253: - FLOW sequential files are added;
                    254: - new escape sequence is added to handle flow files (\x + hexadecimal code).
                    255: Known escape sequences are \", \b, \n, \t, \x?? and \\.
1.60      bertrand  256: * Sun Mar 06 2011 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.20 (RPL/2)
                    257: - Ncurses is upgraded to 5.8;
                    258: - ALARM is fixed by filling isdst field;
                    259: - catch ECONNRESET in write intrinsic to return an execution error instead of
                    260: system one;
                    261: - fix a typo in HELP intrinsic;
                    262: - Openssl is upgraded to 1.0.0d, sqlite to 3.7.5 and readline to 6.2;
1.57      bertrand  263: - Lapack is upgraded to 3.3.0;
1.58      bertrand  264: - libmtmalloc is now default Solaris allocator;
1.56      bertrand  265: - ncurses is upgraded;
1.60      bertrand  266: - regression introduced by 4.0.19 is fixed in signal management.
1.59      bertrand  267: Interruption1() could be called from itself and raises bus error (on sparc) or
1.55      bertrand  268: segmentation fault;
                    269: - sqlite is upgraded to 3.7.4;
1.54      bertrand  270: - OpenSSL is upgraded to 1.0.0c;
                    271: - syntax error is correctly checked ( (2+,0) does not crash RPL/2 anymore);
                    272: - characters are tested in recherche_type() to avoid names like '12+';
1.53      bertrand  273: - gnuplot is upgraded to 4.4.2 due to major bugs.
1.52      bertrand  274: * Thu Sep 23 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.19 (RPL/2)
                    275: - due to a very strange bug I've only seen on Solaris, ptmalloc3 is removed.
                    276: Solaris libresolv randomly uses ptmalloc3 and system allocator and makes heap
                    277: corruption. As internal memory management have been improved, a best fit
                    278: allocator like ptmalloc3 is not required anymore;
1.50      bertrand  279: - gnuplot is upgraded to 4.4.1;
                    280: - deadlock is fixed in signal handlers: same mutex was used in standard
                    281: subroutines (without protected sections by sigprocmask() or pthread_sigmask())
                    282: and signal handlers. A new signal handler specific mutex is added;
                    283: - minor bug is fixed in evaluation() subroutine. In { X 0 PI }, PI is a function
                    284: that has to be evaluated by ->NUM;
1.49      bertrand  285: - rplfile build process is modify to be sure that rplfile is not modified
                    286: after rpl build stage (to be sure that rplfile checksum is not modified after
                    287: rpl compilation);
1.51      bertrand  288: - AWK is replaced by rplawk. rplawk is original awk written by Brian Kernighan,
                    289: modified to remove yacc code and renamed;
1.47      bertrand  290: - some workarounds have been written to not use buggy klibc SystemV IPCS.
                    291: ABORT now works on eComStation;
                    292: - sqlite is upgraded to 3.7.2;
                    293: - bug is fixed in software interrupts. When both process have different PID,
                    294: parent process was not interrupted if it is not group master process. To fix
                    295: this bug, SIGINJECT signal is not sent by child process but by control thread
                    296: in parent process;
1.46      bertrand  297: - minor bug is fixed in data injection (POKE) that does not work as expected
                    298: when child process is protected by NRPROC.
1.44      bertrand  299: * Thu Aug 26 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.18 (RPL/2)
1.43      bertrand  300: - --enable-sysv-sems is added to configure script to use SystemV semaphores
                    301: functions instead of POSIX functions. This function is disabled or forced on
                    302: systems that does not provide correct POSIX or SysV semaphores subsystem;
                    303: - a dirty but not quick patch is written to workaround broken siginfo
                    304: structures. This patch has been successfully tested. It uses a segment of
1.50      bertrand  305: shared memory (Posix or SysV) and some semaphores (Posix or SysV) by process
1.43      bertrand  306: (Unix PID);
1.41      bertrand  307: - some OpenBSD's hacks are added;
                    308: - broken siginfo->si_pid field is now checked by configure script;
1.40      bertrand  309: - SWI now sends SIGCONT to interrupted process to start interrupt without delay;
                    310: - random generator is cloned by SPAWN;
                    311: - in transliteration subroutine : '\r' is added after all '\n' in OS/2 port;
1.39      bertrand  312: - getaddrinfo is hardcoded when host system does not provide getaddrinfo
1.40      bertrand  313: or freeaddrinfo;
1.39      bertrand  314: - RPL/2 can now use SystemV semaphores when POSIX semaphores are unavailable;
                    315: - major bug is fixed in CHR intrinsic when obtained character is not printable;
                    316: - Lapack is upgraded to 3.2.2;
1.37      bertrand  317: - OS/2 (eComStation 2.0 with EMX 0.9d) support is added;
1.36      bertrand  318: - TOKENIZE is now able to convert escape sequences;
                    319: - ATPOKE and CLRATPOKE new intrinsics are added;
                    320: - --enable-full-static configure flag is added. With this flag, mysql and
                    321: postgresql libraries are statically linked in rpl executable;
                    322: - units Makefile is modified to avoid readline and ncurses usages;
1.37      bertrand  323: - sqlite is upgraded to 3.7.0.1;
1.36      bertrand  324: - units is upgraded to 1.88;
                    325: - another major bug is fixed in the same variable creation subroutine.
                    326: Level 0 and 1 variables adresses were swapped when a global variable masked
                    327: a name of RPL/2 routine;
1.35      bertrand  328: - major bug is fixed in global variable creation subroutine. When a global
                    329: variable was created and when a local variable existed with the same name,
                    330: computed address of global variable was wrong;
                    331: - src/Makefile.am is modified to avoid a bug on several systems. libptmalloc3
                    332: is forced in front of all libraries.
1.34      bertrand  333: * Tue Jul 13 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.17 (RPL/2)
                    334: - BACKTRACE intrinsic is added;
                    335: - major bug is fixed in SELECT/DEFAULT/END conditional structure. Only occurs
                    336: when this structure is included in IFERR/THEN/END structure and when an error is
                    337: caught;
                    338: - major bug is fixed in analyse() subroutine. When evaluation() returned error
                    339: in a compiled program, analyse() caught this error twice and randomly aborted
                    340: with a segmentation error;
                    341: - TRIM and TOKENIZE replace both '\n' and '\t' by regular spaces;
                    342: - ATEXIT subroutine begins with an implicit CSTOP to avoid multiple stop
                    343: signals;
                    344: - memory leak is fixed in ROW+. It only occurs when a row is added to an empty
                    345: matrix.
1.33      bertrand  346: * Thu Jun 24 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.16 (RPL/2)
                    347: - minor bug is fixed in evaluation() subroutine. With this patch, same program
                    348: returns same result with or without -p flag;
                    349: - ncurses 5.7 is upgraded to 20100619;
                    350: - openssl is upgraded to 1.0.0a;
1.32      bertrand  351: - interrupt stacks are now FIFO instead of LIFO;
                    352: - debug memory allocation subroutines are improved to run in multithreaded
                    353: programs;
                    354: - some memory leaks are fixed in process management (SPAWN and DETACH);
                    355: - version verification is added to shared objects;
                    356: - -D_GNU_SOURCE is added to ptmalloc3 makefile to avoid a major bug on 64 bits
                    357: linux (false mremap() prototype);
                    358: - major bug is fixed in rpliconv. getc() returns an int, not a unsigned char.
1.30      bertrand  359: * Sun May 23 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.15 (RPL/2)
1.29      bertrand  360: - all '-' are replaced by '_' in random generator list;
1.28      bertrand  361: - minor memory leak is fixed in OPEN intrinsic (socket);
                    362: - major bug is fixed in IFERR structure. Only occurs in compiled program;
                    363: - major bug is fixed in copie_objet() and liberation(). Only concerns
                    364: format in FCH (file descriptor) and SCK (socket descriptor);
                    365: - debug routines are improved;
                    366: - PROCID is added;
                    367: - MEMLOCK and MEMUNLOCK are added. MEMLOCK forces a process to remain in memory
                    368: and to not use swap;
1.26      bertrand  369: - major bug is fixed in sql support. SQL connections were closed in all chield
                    370: process;
                    371: - standard allocator (malloc()/free()) is replaced by ptmalloc3 due to some bugs
                    372: discovered in Solaris thread safe allocators (libmalloc and libumem) that
                    373: are first fit class allocators. Solaris libmtmalloc works better and is
                    374: a best fit class allocator but its performance is poor than ptmalloc3
                    375: performance;
1.24      bertrand  376: - major bug is fixed in ROW+ intrinsic (new row was not added where it
                    377: should);
                    378: - minor bugs are fixed in interruptions.c (semaphores values when error is
                    379: caught);
                    380: - major bug is fixed in STOP intrinsic. STOP was unable to stop any process
                    381: created by SPAWN;
                    382: - SIGFABORT is added. When process receives SIGFSTOP, it tries to execute
                    383: ATEXIT. If it receives SIGFABORT, it does not;
1.23      bertrand  384: - ONEXIT is renamed in ATEXIT;
                    385: - ONEXIT new intrinsic is added.
1.20      bertrand  386: * Wed Apr 21 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.14 (RPL/2)
                    387: - major bug is fixed in static and shared variables initialization subroutine.
                    388: This bug only occurs when RPL/2 tries to create a shared or static variable
                    389: from an expression;
                    390: - major bug is fixed in copie_etat_processus(). A field that contains
                    391: information about shared variable was not copied to new processus structure;
1.19      bertrand  392: - some little memory leaks are fixed in evaluation(), recherche_type() and
                    393: sequenceur(). They only occured when syntax error were caught;
                    394: - IMPLICIT causes execution error instead system error;
                    395: - Hurd support is improved but currently broken because Hurd does not support
                    396: SIG_INFO. Work in progress;
                    397: - OpenBSD specific support is removed from sources;
                    398: - support for Mac OS X and Windows/Cygwin is added.
1.17      bertrand  399: * Wed Apr 07 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.13 (RPL/2)
                    400: - implicit names can now be disabled by new IMPLICIT intrinsic:
                    401: cauchy:[~/cvs/test] > cat implicit.rpl
                    402: #!/usr/local/bin/rpl -sp
                    403: TEST
                    404: <<
                    405:     "none" implicit
                    406: 
                    407:     1 -> Z
                    408:     <<
                    409:         Z disp
                    410:         'Z' disp
                    411:     >>
                    412: 
                    413:     'Z' disp
                    414:     Z disp // Undefined
                    415: >>
                    416: 
                    417: cauchy:[~/cvs/test] > LANG=C ./implicit.rpl
                    418: +++RPL/2 (R) version 4.0.13 (Wednesday 04/07/10, 13:57:44 CEST)
                    419: +++Copyright (C) 1989 to 2009, 2010 BERTRAND Joel
                    420: 1
                    421: 'Z'
                    422: 'Z'
                    423: +++System : Invalid implicit name [6631]
                    424: cauchy:[~/cvs/test] > 
                    425: 
                    426: RPL/2 aborts because the last Z is undefined and not protected by ''.
                    427: By default, implicit is set to "ALL";
1.16      bertrand  428: - sqlite is upgraded to 3.6.23.1;
                    429: - openssl is upgraded to 1.0.0;
                    430: - major bug is fixed in RETURN intrinsic. It only occurs in evaluation
                    431: subroutine;
                    432: - table variable can now be sorted by SORT;
                    433: - some regressions between libtool 1.x and 2.x are fixed by workarouds in
                    434: Makefiles;
1.15      bertrand  435: - -a command line option analyzes program (structure and syntax) and
                    436: sends preprocessor output to standard output. This option is used by
                    437: rplc (RPL/2 compiler).
1.13      bertrand  438: * Tue Mar 09 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.12 (RPL/2)
                    439: - in formatted file, string format returned a variable length string even if
                    440: format was 'CHARACTER*(n)' (n characters string). Now, 'CHARACTER*(*)' returns
1.15      bertrand  441: a variable length string and 'CHARACTER*(n)' a fixed length string;
1.13      bertrand  442: - keyed access files support is added. Currently, only formatted files are
                    443: supported;
                    444: - direct access files support is added. Currenlty, these files can only be used
                    445: in formatted mode;
                    446: - virtual variables are now writte in UTF-8 and all special characters
                    447: in string are escaped;
1.12      bertrand  448: - all formatted files are now converted into UTF-8;
1.17      bertrand  449: - all file and unix socket names created by RPL/2 are now UTF-8 compliant;
1.12      bertrand  450: - RPL/2 tools (rpliconv, rplfile, rplpp and rplconvert) are now checked before
                    451: each execution (md5 and sha1 sums) to enhance security. If one of these tools
                    452: have been modified between RPL/2 compilation and current execution, RPL/2 aborts
                    453: on a non recoverable system error;
                    454: - openssl and sqlite3 libraries are added;
                    455: - RPL_HOME env variable is added. When RPL/2 is called from librpl, this
                    456: variable indicates RPL/2 root directory. If it is not set, root path
                    457: is given by configure script (d_exec_path);
1.11      bertrand  458: * Thu Mar 03 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.11 (RPL/2)
                    459: - configure.in and makefile.am's are modified to add Cygwin support. Interix
                    460: support is broken;
1.10      bertrand  461: - memory leak is fixed in recherche_type();
                    462: - TeX files are now written in UTF-8 even default locale differs;
                    463: - minor bug is fixed in ->STR (escaped characters);
1.9       bertrand  464: - minor bug is fixed in ->Q intrinsic. Resultat is returned as integer
                    465: fraction intead real one;
                    466: - SIGN now returns (0,0) instead (nan,nan) when complex argument is null;
1.8       bertrand  467: - Makefile.am are modified to authorize parallel builds;
1.7       bertrand  468: - minor bug is fixed in CR intrinsic. CR sends a carriage return to printer
                    469: and writes warning to standard output;
1.6       bertrand  470: * Wed Feb 10 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.10 (RPL/2)
1.5       bertrand  471: - escape codes are now converted in formateur(), not in recherche_type() to
                    472: avoid a minor bug in EDIT and VISIT intrinsics;
1.4       bertrand  473: - minor bug is fixed in formateur_reel();
1.7       bertrand  474: - file-5.03 is patched to avoid bus error on systems that require memory
1.3       bertrand  475: alignment;
1.2       bertrand  476: - minor bug is fixed in evaluation(). Error returned by RPL/C external functions
                    477: were able to be avoided by evaluation routine.
1.1       bertrand  478: * Tue Jan 26 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.9 (RPL/2)
                    479: - New benchmark on same hardware than old one :
                    480: cauchy:[~/rpl/bench] > ./bench.rpl 
                    481: +++RPL/2 (R) version 4.0.9 (samedi 23/01/2010, 18:06:08 CET)
                    482: +++Copyright (C) 1989 ŗ 2009, 2010 BERTRAND JoŽl
                    483: Number of scalar operations per second and per core : 2383016
                    484: 
                    485: - PULPRFL does not abort on BUG() but on execution error;
                    486: - TRIM, REPL and TOKENIZE are added;
                    487: - sockets options are now set before bind();
                    488: - shutdown() is added to all connected sockets;
                    489: - minor bug is fixed in SUB intrinsic (segfault when SUB is called with
                    490: list argument and inexistant elements).
                    491: * Fri Jan 08 2010 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.8 (RPL/2)
                    492: - minor bug is fixed in DAEMON intrinsic. When a program was daemonized, all
                    493: signals sent to main process were not caught because DAEMON did not replace
                    494: old pid by new one;
                    495: - major bug is fixed in IFERR/THEN/ELSE/END. Only occurs in expression
                    496: evaluation when an error is reported from a subroutine in another subroutine.
                    497: For example, error was not caught in following program when it is executed with
                    498: -p option :
                    499:    TEST << iferr TEST2 then end >>
                    500:    TEST2 << 0 inv >>
                    501: - major bug is fixed in variable management. Some local variables were
                    502: seen as global ones;
                    503: - major bug is fixed in rplcore. Rplcore entered in dead lock when
                    504: script file contains a multibyte character;
                    505: - IN intrinsic is added;
                    506: - major bug is fixed in SAME intrinsic : << 1 >> DUP SAME and 'E' DUP SAME
                    507: returned false ;
                    508: - major bug is fixed in RETURN intrinsic. It only occurs in compiled
                    509: programs;
                    510: - major bug is fixed in NEG intrinsic. NEG did not make a copy of its arguments;
                    511: - regression is fixed in compilation(). "\\" was analysed as '"' '\' '\"' and
                    512: strings were never closed;
                    513: - some bugs have been fixed in file management;
                    514: - RPL/2 can now be run on EBCDIC systems (OS/390);
                    515: - major bug is fixed in -A command line option (NULL character is missing);
                    516: - minor bug is fixed in rpliconv and RECODE intrinsic. All transliterations are
                    517: made by blocks (1024 bytes). When an incomplete multibyte sequence is
                    518: encountered at end of block, subroutine aborts with an execution error;
                    519: - major bug is fixed in OPEN (TCP/IPv4 sockets).
                    520: * Mon Nov 30 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.7 (RPL/2)
                    521: - DISP now locks stdout;
                    522: - rpliconv is added to replace standard iconv provided by operating system.
                    523: Indeed, conversion between different encodages requires transliteration
                    524: that is not offered by some iconv utility;
                    525: - CURRENC and RECODE intrinsics have been written to allow strings conversions;
                    526: - bug is fixed in SYSEVAL. When execvp() returns (for example when arg[0] can
                    527: not be found), SYSEVAL enters in a dead lock;
                    528: - fprintf is replaced by some functions that allow transliterations between
                    529: locales;
                    530: - '"' can now be used in strings ("\"");
                    531: - iconv is called with -c in preprocessor stage. It is done to write
                    532: CGI scripts with RPL/2 because locale charset is set to ANSI_X3.4-1968;
                    533: - double free is fixed in liberation() (type SQL, only occurs when locale is
                    534: set);
                    535: - LOCALIZATION, UCASE and LCASE are added;
                    536: - major bug is fixed in EXIT intrinsic that was able to return a false
                    537: execution error in compiled scripts (only in DO/UNTIL and REPEAT/WHILE loops);
                    538: - major bug is fixed in wrapper_instruction_intrinseque(). When intrinsic() was
                    539: used in onLoading from shared library, USE was pushed on stack as algebraic
                    540: expression;
                    541: - libiconv is upgraded to 1.13.1;
                    542: - gnuplot is upgraded to 4.2.6;
                    543: - gsl is upgraded to 1.13.
                    544: * Mon Sep 28 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.6 (RPL/2)
                    545: - pipe() is overwritten by a macro to avoid a system error. Communication
                    546: between process are done with pipes and these pipes are managed by a
                    547: specific asynchrone thread. If a script try to create more threads than
                    548: management thread can destroy, you can quickly achieve maximum number of
                    549: opened files and pipe() shall return a system error. This macro tries to create
                    550: pipes. If pipe() function returns an error, macro waits and retries. If
                    551: number of retries is greater than a hardcoded value, macro returns an error;
                    552: - major bug (deadlock) is fixed in process and thread management. I hope
                    553: this bug shall be the last one;
                    554: - major bug is fixed in DET intrinsic (determinant was computed without LU
                    555: diagonalization);
                    556: - SWAPCNTXT is added;
                    557: - minor bug is fixed in Makefile.am (licences rule).
                    558: * Wed Sep 09 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.5 (RPL/2)
                    559: - some bugfixes are added in process management;
                    560: - all process management is rewritten to avoid usage of defunct process
                    561: or thread number;
                    562: - new major bug is fixed in interruptions.c. Sometimes, when retrait_thread()
                    563: was called before a pending interruption5 (SIGFSTOP), signal handler uses
                    564: a freed semaphore and corrupts heap;
                    565: - CLRERR is added to erase previous errors;
                    566: - ERRN and ERRM return exception message and number;
                    567: - major bug is fixed in interruptions.c. All signal are now bufferised
                    568: when semaphore_liste_threads is null to avoid deadlock. This bug only
                    569: occured when STOP was sent to a dying thread or process (when this thread or
                    570: process was running retrait_thread());
                    571: - matrix rank is computed before matrix inversion;
                    572: - file locks are added to stdin and stdout. stderr is not locked because
                    573: all messages written by signal handlers are sent to stderr;
                    574: - configure.in script is modified to test gcc version and avoid a bug in
                    575: gcc older than 4.4;
                    576: - some benchmarks have been done :
                    577: 
                    578: cauchy:[~/rpl/bench] > ./bench.rpl 
                    579: +++RPL/2 (R) version 4.0.5 (mardi 04/08/2009, 18:23:07 CEST)
                    580: +++Copyright (C) 1989 ŗ 2008, 2009 BERTRAND JoŽl
                    581: Number of scalar operations per second and per core : 2109867
                    582: 
                    583: Workstation :
                    584: cauchy:[~/rpl/build] > uname -a
                    585: Linux cauchy 2.6.30.1 #1 SMP PREEMPT Thu Jul 16 09:49:46 2009 x86_64 GNU/Linux
                    586: cauchy:[~/rpl/build] > cat /proc/cpuinfo | grep "model name"
                    587: model name      : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
                    588: model name      : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
                    589: cauchy:[~/rpl/build] > gfortran -v 2>&1 | grep "gcc version"
                    590: gcc version 4.3.3 (Debian 4.3.3-14) 
                    591: cauchy:[~/rpl/build] >
                    592: 
                    593: - SVL and SVD are added;
                    594: - COND and RANK are added;
                    595: - DIAG-> and ->DIAG are added;
                    596: - major bug is fixed in DET intrinsic. DET is rewritten to avoid usage of
                    597: eigenvalues. In a first time, matrix rank is estimated to force determinant
                    598: to zero if matrix is rank deficient. If not, a PLU decomposition is done to
                    599: compute determinant;
                    600: - QR matrix decomposition is added;
                    601: - LQ matrix decomposition is added;
                    602: - Fortran90 files are rewritten to use Fortran2003 bind(C) statement and
                    603: Fortran preprocessor;
                    604: - default compilation options are now -Wall -Wextra -Wno-pointer-sign
                    605: -Wno-unused-parameter;
                    606: - all mathematical exceptions are now signaled by exceptions instead of
                    607: execution error;
                    608: - minor bug is fixed in both CSTOP and RSTOP intrinsics. Without this fix, you
                    609: can call twice CSTOP without RSTOP;
                    610: - named semaphore support is added (CRSMPHR, CLRSMPHR, SMHRDECR, SMPHRINCR,
                    611: SMPHRTRYDECR, SMPHGETV).
                    612: * Fri Jul 24 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.4 (RPL/2)
                    613: - semaphore is added in interruptions.c to avoid segmentation fault when STOP
                    614: signal is sent to a dying thread. Some mutexes are replaced by semaphores too
                    615: to be used in signal handlers;
                    616: - major bug (memory corruption) is fixed in COL- intrinsic;
                    617: - minor bug is fixed in ALARM and WAIT. These temporisations stopped when a
                    618: software interrupt was caught;
                    619: - rplpp man page is added.
                    620: * Fri Jul 17 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.3 (RPL/2)
                    621: - minor bug is fixed in WRITE (SIGPIPE is ignored to catch error without
                    622: process termination);
                    623: - major bug is fixed in FUSE intrinsic (FUSE kills itself and do not kill
                    624: its parent);
                    625: - a mutex to protect fork() syscall is added;
                    626: - all mutexes are unlocked after fork() in DETACH;
                    627: - minor bug (double free corruption) is fixed in CLOSE intrinsic;
                    628: - major bug is fixed in lecture_pipe when a nullified list is sent into a pipe;
                    629: - WORKDIR intrinsic is added;
                    630: - Level 0 variables are shared between all threads without copy. Indeed,
                    631: there variables are not modifiable and only contains static user definitions;
                    632: - branches prediction is added in THEN, ELSE, ELSEIF and REPEAT intrinsics;
                    633: - FORTRAN 77 file management subroutines are rewritten in pure C due to
                    634: FORTRAN string management. C/FORTRAN 77 string interfaces are broken
                    635: in some cases (gcc/gfortran/libc/OS and arch conjonction);
                    636: - a memory leak is fixed in REMOVE intrinsic;
                    637: - major bug is fixed in MySQL driver (segfault due to a bug in mysql_init()
                    638: and due to a libmysqlclient that is not thread safe).
                    639: * Wen Jun 10 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.2 (RPL/2)
                    640: - new enhanced allocator is written for regular variables, static variables and
                    641: shared variables;
                    642: - major bug is fixed in src/interruptions.c. This file did not compile
                    643: when SQL support was not enabled;
                    644: - new allocator is written for system stack and last stack;
                    645: - --enable-profile flag is added to configure script. When this flag is
                    646: enabled, rpl is built with -pg option;
                    647: - SIGFSTP (from Solaris'TERMIO) is caught. On Solaris 10, all process receive
                    648: SIGFSTP (with a nullified siginfo structure) instead of SIGHUP when control
                    649: process is killed;
                    650: - abs() macro is modified to avoid multiple evaluation. Your C compiler has to
                    651: know typeof() intrinsic function. This function is not standard but exists
                    652: under Sun Studio, gcc, and maybe some others compilers. If this function does
                    653: not exist on your compiler, you can change its definition by old one in
                    654: src/rpl.h;
                    655: - fflush() can now be interrupted by signal (SunOS);
                    656: - fflush(NULL) is called before all fork() occurrences;
                    657: - generators returned by RDGN help are sorted;
                    658: - Lapack is now 3.2.1.
                    659: * Mon May 18 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.1 (RPL/2)
                    660: - bug is fixed in src/generateurs_aleatoires.awk. It only occurs when RPL/2 is
                    661: built under Solaris.
                    662: * Wed May 5 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0 (RPL/2)
                    663: - major bug is fixed in matrix inversion (due to an inversion between pointer
                    664: and object copies);
                    665: - RDGN is added to use some different random number generators. See HELP RDGN;
                    666: - code analysis is rewritten from scratch to be more efficient and mode
                    667: expandable;
                    668: - minor bug (segfault in interruption1) is fixed. It only occurs on Solaris
                    669: that can returns a nullified siginfo pointer when SIGINT is sent by kernel
                    670: keyboard driver;
                    671: - gnuplot is now 4.2.5;
                    672: - readline is upgraded to 6.0;
                    673: - file is upgraded to 5.0;
                    674: - Signal handlers are rewritten to send signal to main thread when a signal
                    675: is send from an external process;
                    676: - configure.in is modified to avoid a libc bug on Solaris (free() can enter in
                    677: deadlock when a huge amount of threads is launched);
                    678: - minor bug is fixed in boath START and FOR intrinsic. Only occurs when
                    679: arguments types are unsupported;
                    680: - PLOT instrinsic is added (usage: LINE and MARK do not draw anything. All
                    681: data are buffered. PLOT is used to draw these objects.);
                    682: - MARK instrinsic is added;
                    683: - new allocator mechanism is written;
                    684: - some regression bugs have been fixed, some memory leaks too.
                    685: * Wed Jan 28 2009 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.9 (RPL/2)
                    686: - an estimation of future stack elements is added to avoid some costly memory
                    687: allocations. This function has a positive impact on execution speed;
                    688: - PSHPRFL and PULPRFL have been added;
                    689: - RPL/2 can be built on Solaris 64 bits with some minor scripts alterations.
                    690: See README for more explanations;
                    691: - MTXSTATUS intrinsic is added;
                    692: - YIELD intrinsic is added;
                    693: - ERRM is fixed. In some cases, ERRM uses some uninitialized pointers;
                    694: - SHARED and PRIVATE intrinsics have been added. A shared variable is a
                    695: static variable that is shared by multiple threads;
                    696: - '->' intrinsic is improved. All object copies have been avoided;
                    697: - -n flag is added to catch HUP signal. stderr and stdout are redirected
                    698: to a file, stdin is redirected to /dev/null when control process is killed;
                    699: - a mutex is added to each object (before this modification,
                    700: RPL/2 used a global mutex and performances in multithreaded programs were very
                    701: poor.);
                    702: - ALARM is now interruptible;
                    703: - both PUT and PUTI intrinsics are improved and do not copy list and table
                    704: when nombre_occurrences == 1;
                    705: - COPY intrinsic is added. Argument (that can be pointed from some objects)
                    706: is replaced by a new copy of itself;
                    707: - memory leak is fixed in sequenceur(). It only occurs when an execution error
                    708: is caught from interactive mode;
                    709: - mutexes have been added (CRMTX, CLRMTX, MTXLOCK, MTXUNLOCK);
                    710: - new mutex type is added;
                    711: - profile statistics have been added. See -P option;
                    712: - major bug is fixed in analyse_syntaxique();
                    713: - new SQL type is added;
                    714: - due to a trouble in libpq in multithreaded context, SQL intrinsic is split
                    715: in three new intrinsics : SQLCONNECT, SQLQUERY and SQLDISCONNECT. Please note
                    716: that all programs that worked with old SQL intrinsic can now work with
                    717: SQLQUERY. With all new programs, you can open a real connection to databases;
                    718: - NRPROC is added. This new intrinsic is used to catch error from child
                    719: process. Without NRPROC, any errors returned by child process cause
                    720: main process to abort;
                    721: - SPAWN is added. This new intrinsic is used to launch a new thread (DETACH
                    722: starts a new process). There are no mutexes in RPL/2 because all spawned process
                    723: use specific context. Nevertheless, shared variables and associated mutexes
                    724: should be added;
                    725: - -D flag and DAEMONIZE intrinsic have been added;
                    726: - REPEAT, THEN, ELSE and ELSEIF intrinsics are rewritten to be more efficient;
                    727: - autoconf script is modified to handle mysql and postgresql on non standard
                    728: directories;
                    729: - -t flag is fixed ('\0' is missing...);
                    730: - SWI and SEND pipes have been modified to be more robust on systems where
                    731: getpid() can return (pid_t) -1 or (pid_t) -2 value;
                    732: - major bug is fixed in REPEAT intrinsic. Only occurs in compiled mode;
                    733: - all but jump variables are removed from source. All signal handlers now
                    734: use encapsulated variables and signals are caught by thread;
                    735: - major bug is discovered in ->LCD. Both LCD-> and ->LCD have been fixed;
                    736: - NEWPLANE is added;
                    737: - LINE is added;
                    738: - DGTIZ is added;
                    739: - major bug is fixed in ROW-> intrinsic (comes from new garbage collector);
                    740: - lot of multiprocessing related bugs have been fixed; That was a huge work but
                    741: it's done. Data integrity is now respected during transmission (POKE, SEND and
                    742: SWI);
                    743: - ITRACE is added. This intrinsic is only used to debug internal structures and
                    744: should not be used in regular programs;
                    745: - SWISTATUS is written;
                    746: - WFACK is written;
                    747: - rplcore files are now able to handle compilation errors;
                    748: - rplcore files are now able to handle evaluation and interruption errors;
                    749: - SORT can now be used on table;
                    750: - tables can now be sent by POKE and SEND instrinsics;
                    751: - software interrupts do not inherit IFERR controls;
                    752: - LOGGER intrinsic is added;
                    753: - All WF* intrinsics but WFSOCK are made interruptible;
                    754: - ISWI intrinsic is added. Current interrupt is marked as 'interruptible';
                    755: - tables can be used with SAME intrinsic;
                    756: - minor bug is fixed in recherche_variable(). Only occurs when an error
                    757: is caught;
                    758: - external functions can now be used in expressions;
                    759: - major bug (deadlock) is fixed in WFPOKE intrinsic;
                    760: - some mistakes have been fixed under Solaris;
                    761: - major bug is fixed in RETURN intrinsic (only occurs when evaluation and
                    762: program modes are mixed);
                    763: - major bug (dead lock) is fixed in gestion_processus.c;
                    764: - major bug is fixed in WFPROC;
                    765: - rplc, rpllink and mkrplso manpages are added;
                    766: - rpltags tool and manpage are added;
                    767: - WFLOCK is fixed;
                    768: - RPL/2 kills now all process on error;
                    769: - major bug (segfault) is fixed in REMOVE intrinsic.
                    770: * Mon Jul 28 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.8 (RPL/2)
                    771: - configure script is modified to check mysql and postgresql libraries
                    772: on all standard locations. Tested and works on FreeBSD, Solaris and Linux
                    773: Debian;
                    774: - Tables are allowed in eval ( <[ 1 ]> 't' sto 't(1)' eval );
                    775: - ->TABLE and TABLE-> intrinsics are added;
                    776: - major bug is fixed in recherche_type(). Only occurs when rpl executes
                    777: precompiled scripts;
                    778: - new type is added: table with <[ ]> delimiters:
                    779: RPL/2> { 2 3 2 } crtab
                    780: 
                    781: 1: <[ <[ <[ { }
                    782:             { } ]>
                    783:          <[ { }
                    784:             { } ]>
                    785:          <[ { }
                    786:             { } ]> ]>
                    787:       <[ <[ { }
                    788:             { } ]>
                    789:          <[ { }
                    790:             { } ]>
                    791:          <[ { }
                    792:             { } ]> ]> ]>
                    793: 
                    794: CRTAB new intrinsic creates a regular table. By default, all elements are
                    795: nullified lists;
                    796: - rplexternals.h is modified and improved;
                    797: - GNU File (renamed as rplfile) cannot be built due to a bug in libtoolize and
                    798: configure script.
                    799: * Mon Jun 23 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.7 (RPL/2)
                    800: - libiconv is added (iconv library exists on some systems but implemantations
                    801: differ and RPL/2 can crash);
                    802: - --enable-encoding is added to configure script to force system encoding.
                    803: Enconding detection does not work on OpenBSD;
                    804: - internal file utility is shipped and used to avoid xBSD file mistakes;
                    805: - GSL 1.11 and gnuplot 4.2.3 are now used;
                    806: - src/Makefile.am is modified to built RPL/2 ons Solaris 10/sparc;
                    807: - all but user's messages are written on stderr;
                    808: - DUPCNTXT and DROPCNTXT are added to handle more efficiently contexts;
                    809: - SCHED is added. Whit SCHED, you can limit CPU ressource by RPL/2 process;
                    810: - FUSE, RFUSE and CLRFUSE have been added;
                    811: - new bug discovered on NetBSD. sigpending() does not return any signal, thus
                    812: DETACH intrinsic enters in a definitive dead lock. I have no idea to write a
                    813: workaround for this major bug. Nevertheless, all others capabilities seems to
                    814: work fine;
                    815: - '->' is modified to return error when program tries to initialiaze two
                    816: variables with the same name like
                    817: 1 0 -> I I << ... >>;
                    818: - CSTOP and RSTOP have been added (catch and release stop signal);
                    819: - CONTINUE is added to continue a pending process halted by SUSPEND;
                    820: - SUSPEND is modified to be stopped by SIGFSTOP;
                    821: - src/Makefile.am is modified to avoid //TRANSLIT flag on systems that don't
                    822: support GNU iconv;
                    823: - configure.in script is modified to avoid bugs when --with-postgresql and
                    824: --with-mysql are specified;
                    825: - TRNC is written;
                    826: - minor bug is fixed in both IFT and IFTE. Returned expression has to be
                    827: evaluated.
                    828: * Fri Apr 11 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.6 (RPL/2)
                    829: - SIGPIPE signal handler is modified to avoid abort process when POKE tries
                    830: to write data into a pipe without reader;
                    831: - major bug is fixed in RETURN intrinsic. When RETURN was called from a detached
                    832: process without -p modifier, it can send an ABORT signal instead a KILL one;
                    833: - PEEK, POKE and WFPOKE new intrinsics are written;
                    834: - major bug due to new garbage collector is fixed in rplexternals.h (double free
                    835: corruption);
                    836: - CLRCNTXT is added (clear contexts);
                    837: - VERIFY intrinsic is written;
                    838: - PSHCNTXT and PULCNTXT are added (PSHCNTXT pushes context on an
                    839: internal contexts stack, PULCNTXT pulls contexts from this internal stack).
                    840: Main usages of these intrinsics are in conjonction with IFERR or with
                    841: software interrupts;
                    842: - HEAD, TAIL and REVLIST intrinsics are added;
                    843: - function pointers have been added to function description;
                    844: - new analyse() routine is written. All instrinsics are now in a N-tree;
                    845: - software interrupts have been fixed;
                    846: - multitasking capabilities have been modified to be usable on NetBSD. All real
                    847: time signals have been removed;
                    848: - major bugs are fixed in multitasking (mutex trouble _and_ segmentation fault);
                    849: - minor bug is fixed in STR->. STR-> could return a system error instead an
                    850: execution one;
                    851: - first bug due to new garbage collector is fixed in '+' ({ } { } +) and in
                    852: '-' intrinsics;
                    853: - PostgreSQL support is written.
                    854: * Mon Mar 17 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.5 (RPL/2)
                    855: - locale can now be specified in SQL intrinsic :
                    856: { "mysql:iso-8859-1" "server" "database" ... };
                    857: - major bug is fixed un analyse_algebrique(). When DISP printed an algebraic
                    858: object, 'DISP()' was pushed in stack;
                    859: - same major bug is fixed in <, >, <=, >= and <>;
                    860: - major bug fixed in formateur() (segfault when a symbol is used without "'");
                    861: - major bug is fixed in DUPN intrinsic;
                    862: - when software interrupt (SWI) is evaluated, SWI pushs process id on stack
                    863: before starting interrupt evaluation;
                    864: - -f parameter is added when iconv is called;
                    865: - as old file program was bugged, a new option is added to configure script.
                    866: When configure is called with --disable-encoding-autodetection, make does not
                    867: try to detect source encoding. Please, do not use if RPL/2 can be built
                    868: without this option !
                    869: - new garbage collector (and more efficient) is written;
                    870: - configure script is modified to be usable on NetBSD 4.0, but as NetBSD does
                    871: not support real time signals, RPL/2 cannot use multitasking functions;
                    872: - error returned by preprocessor are now catched by RPL/2;
                    873: - -p option is added. With this option, all scripts are compiled before
                    874: RPL/2 starts evaluation. HALT cannot be used with -p, but all programs run
                    875: 40% faster;
                    876: - read and write operations in pipe() are rewritten to be sure that such
                    877: operations are atomic;
                    878: - minor bug is fixed in LOGSCALE. With {} LOGSCALE, all scales have to be
                    879: linear;
                    880: - major bug is fixed in gestion_processus.c (some pipes were not closed).
                    881: * Sat Jan 5 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.4 (RPL/2)
                    882: - major bugs have been fixed in software interrupt management.
                    883: * Fri Jan 4 2008 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.3 (RPL/2)
                    884: - JDATE and RDATE are written;
                    885: - minor bug (segfault) is fixed in EXSUB. It only occurs when EXSUB is executed
                    886: with wrong arguments;
                    887: - KILL now kills current process, ABORT kills program;
                    888: - software interrupts support is added (SWI, WFSWI, SWILOCK, SWIUNLOCK,
                    889: SWIQUEUE, STOSWI, RCLSWI, CLRSWI);
                    890: - major bug is fixed in SQL intrinsic (argument types);
                    891: - system stack is now written in core file;
                    892: - ALARM is added;
                    893: - nanosleep() now replaces sleep() and usleep() system calls;
                    894: - _GNU_SOURCE is added to rpl.h.
                    895: * Fri Nov 30 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.2 (RPL/2)
                    896: - License is changed. Now RPL/2 license is CeCILL (GPL compliant);
                    897: - EXGET adn EXSUB are added;
                    898: - minor bug is fixed in recherche_type(). { <<†} has to return an error.
                    899: '<<' and '>>' are both functions _and_ delimiters. Thus { IF } is
                    900: acceptable, but {†>> } isn't;
                    901: - GSL is now 1.10, gnuplot 4.2.2 and units 1.87;
                    902: - OBGET and OBSUB intrinsics are added;
                    903: - src/Makefile.am minor bug is fixed (make clean deleted src/rpl.xpm);
                    904: - WAIT intrinsic is modified to use sleep() and usleep() if delay is
                    905: greater than one second. On some systems, usleep argument must be lower
                    906: than 1E6;
                    907: - numeric and character formats are now tested;
                    908: - -A flag is added. -A is used to give command line parameters to main
                    909: routine. Example:
                    910: rayleigh:[~/rpl-4.0.0.prerelease.2/examples] > ./test3.rpl -A "<< X sin >>"
                    911: +++RPL/2 version 4.0.0.prerelease.2 (vendredi 05.10.2007, 19:03:01 CEST)
                    912: +++Copyright (C) 1989 ŗ 2006, 2007 BERTRAND JoŽl
                    913: << 'X' SIN >>
                    914: rayleigh:[~/rpl-4.0.0.prerelease.2/examples] > cat test3.rpl 
                    915: #!/usr/local/bin/rpl -s
                    916: 
                    917: TEST
                    918: <<
                    919:     disp
                    920: >>
                    921: - minor bug (segfault) is fixed in encart() routine (splash screen). Child
                    922: process ended with segfault due to a mistake in Motif widget cleaning
                    923: process;
                    924: - major bug is fixed in DETACH intrinsic. Child process were locked when
                    925: they were started with a locked mutex that comes from its father;
                    926: - ctrl+C can now kill all child process;
                    927: - WFPROC and WFDATA are rewritten;
                    928: - RETURN is fixed to be usable in detached process;
                    929: - HALT is not exported to child process;
                    930: - FLOW filetype is added;
                    931: - Makefiles are modified to support gcc-4.2 and gfortran-4.2;
                    932: - socket support (Unix, IPv4, IPv6, STREAM, DATAGRAM, ROBUST DATAGRAM,
                    933: SEQUENTIAL DATAGRAM, RAW) is added. Warning: IPv6 sockets have not been tested
                    934: because I don't have any IPv6 compliant server, but they should work.
                    935: * Mon Sep 10 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.1 (RPL/2)
                    936: - library management is rewritten from scratch. EXTERNAL is removed and
                    937: EXTERNALS is added. Now, all exported symbols are sent to RPL/2 when
                    938: library is loaded;
                    939: - OPEN arguments are changed;
                    940: - EXTERNAL now checks availability of external functions;
                    941: - number of arguments is verified in analyse_algebrique().
                    942: 'SIN(A+X,2)' is now refused because SIN requires only one argument;
                    943: - all but lapack symbols are exported from librpl with librpl, f77 or f90
                    944: prefix;
                    945: - minor bug is fixed in formateur() (AND and OR requires parenthesis);
                    946: - rplexternals.h header file is added; Now, it is very easy to write
                    947: external functions;
                    948: - memory leak is fixed in analyse_algebrique();
                    949: - minor bug (symbole flag) is fixed in sequenceur.c and types.c;
                    950: - temp file was not removed when an error occurs in EDIT or VISIT;
                    951: - 'name' should not returned a function ("FCT" object);
                    952: - -rdynamic is added to src/Makefile.am.
                    953: * Mon Jul 23 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.0.0.prerelease.0 (RPL/2)
                    954: - Major bug is fixed in interface_tex.c. When there are errors in latex
                    955: file, latex command waits for input on its command line;
                    956: - major bug is fixed in tex.h (multiline strings);
                    957: - examples subdir is added;
                    958: - major bug is fixed in recherche_variable(). When an expression is evaluated
                    959: in a function, all variables set in this function must be visible in
                    960: expression. Thus, << I -> 3 << << I >> eval >> must return 3, not 'I';
                    961: - LAST stack is saved in rplcore;
                    962: - major bug is fixed in ->HMS. It only occurs when argument type is not
                    963: integer or real;
                    964: - major bug (segfault) is fixed when rpl is called with empty file;
                    965: - libtool support is removed. Two new scripts (rplc and rpllink) are provided
                    966: to use librpl.a;
                    967: - automake scripts are rewritten to avoid a misconfiguration of librpl.a
                    968: when -j make option is used;
                    969: - trace output now contains PID;
                    970: - rpl-core is renamed in rpl-code-$PID;
                    971: - rplc and rpllink scripts can now sompile and build C and Fortran
                    972: executables with librpl.a;
                    973: - New classification, only a working simplification() routine is
                    974: required to announce 4.0.0.final;
                    975: - librpl entry point is modified to return results as strings array;
                    976: - -S option is added;
                    977: - due to a major bug in libtool, libtool is removed from autoconf/automake
                    978: scripts;
                    979: - VERSION is modified to return a list.
                    980: * Tue Jul 17 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8x (RPL/2)
                    981: - major regression bug is fixed in PRINT due to mistake in latex pathes;
                    982: - gnuplot does not have to be built if --disable-embedded-gnuplot is set;
                    983: - new prompt ("RPL/2> ") is used for interactive mode;
                    984: - ARCCOS, ARCSIN, ARCTG, ARGCH, ARGSH, ARGTH, CH, SH, TH and TG intrinsics
                    985: are removed, because all of these intrinsics have two forms. ARCCOS is
                    986: the same than ACOS, TAN=TG, COSH=CH. Please adapt your scripts;
                    987: - gnuplot compilation does not have to be done when disable-gnuplot is set;
                    988: - major bug is fixed in RECV that avoid usage of multitasking.
                    989: * Tue Jul 10 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8w (RPL/2)
                    990: - False error (system error) was reported by recherche_type();
                    991: - recherche_type() returns syntax error if a list is included in
                    992: an algebraic expression;
                    993: - --enable-debug is modified. Now, return can be defined to print
                    994: on stdout its position in source code (line and function);
                    995: - minor bug is fixed in recherche_type(). Don't forget that space
                    996: are not significant in algebraic expression:
                    997: '12 3+ 12    X' is the same expression than '123+12X';
                    998: - src/Makefile.am is modified to avoid double compilation process;
                    999: - --enable-final-run-path is added to configure.in script;
                   1000: - STATIC is modified to declare static variables in expression. Warning: static
                   1001: variables used in expressions are deleted when evaluation of this expression
                   1002: ends;
                   1003: - MEM does not report static variable sizes;
                   1004: - minor bug is fixed in HELP intrinsic. When the last instruction was not
                   1005: known, HELP function was pushed in operational stack. HELP did not work
                   1006: when there were space on input line.
                   1007: * Mon May 28 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8v (RPL/2)
                   1008: - DATE is modified: reduced julian days is replaced by fraction part
                   1009: of julian days. Old field used by julian days is now integer part of julian
                   1010: days;
                   1011: - CONVERT intrinsic is rewritten to accept absolute path in popen;
                   1012: - automake scripts are modified to delete src/lock file if build process aborts;
                   1013: - rplargs.h directly includes rpl.h;
                   1014: - absolute pathes are added to all external program files (rplplot, rplpp...);
                   1015: - intrinsic functions are case sensitive. External functions are case
                   1016: unsensitive. A minor bug is fixed in recherche_type() because all external
                   1017: functions were case unsensitive when they were evaluated from RPN expressions;
                   1018: - HELP function is rewritten to be more friendly (a la OpenVMS);
                   1019: - external wrapper (rplplot) is written to force usage of gnuplot provided
                   1020: by RPL/2 if it is built during build process. If this build does not exist,
                   1021: it tries to launch regular gnuplot;
                   1022: - gnuplot is added to source tree to avoid some trouble between preinstalled
                   1023: gnuplot and release used by RPL/2. This addition to source tree is
                   1024: required by some incompatibility between gnuplot releases;
                   1025: - Lapack is upgraded to 3.1.1 release;
                   1026: - GSL is upgraded to 1.9 revision;
                   1027: - RPL_TMP_PATH env variable is added to specify the path of tempfiles. If
                   1028: it is not set, /tmp is used. If /tmp is not writable, /var/tmp is used. If
                   1029: not, ./ but RPL/2 can hang with a fatal error if this last location is
                   1030: not writable;
                   1031: - major regression is fixed in SYSEVAL intrinsic due to introduction of
                   1032: error scrutation.
                   1033: * Sat Mar 24 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8u (RPL/2)
                   1034: - SYSEVAL is modified to return an error when execvp() syscall cannot
                   1035: execute its arguments;
                   1036: - -hard-float sparc option is remove from mkrplso;
                   1037: - major bug is fixed in SQL intrinsic that hangs when query did not return
                   1038: any values (for exemple INSERT);
                   1039: - escape sequences can be used in SYSEVAL argument like "echo \"string\""
                   1040: SYSEVAL;
                   1041: - graphic and PostScript outputs are now cleared in child process;
                   1042: - locales are now used by preprocessor;
                   1043: - major bug is fixed in impression_tex(). PRINT did not work due to a bug
                   1044: introduced by multitasking code;
                   1045: - SORT can now use name as its argument.
                   1046: * Sun Jan 21 2007 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8t (RPL/2)
                   1047: - Variable management has been rewritten and some tests have been done. Now,
                   1048: it is possible to execute:
                   1049: 
                   1050: #!/usr/local/bin/rpl -sc
                   1051: 
                   1052: TEST
                   1053: <<
                   1054:     1 1000 start VAR_S VAR_S2 next
                   1055: >>
                   1056: 
                   1057: VAR_S
                   1058: <<
                   1059:     static 3 -> C << C disp 'C' incr if C 10 > then 'C' volatile end >>
                   1060: >>
                   1061: 
                   1062: VAR_S2
                   1063: <<
                   1064:     static 3 -> C << C disp 'C' decr >>
                   1065: >>
                   1066: 
                   1067: - configure.in script is added in lapack subtree;
                   1068: - VARS is modified to display variables status (LOCKED/UNLOCKED and
                   1069: STATIC/VOLATILE/PARAMETER/VARIABLE);
                   1070: - STATIC and VOLATILE intrinsics are added to specify static variables. A
                   1071: static variable can be transformed into volatile with VOLATILE.
                   1072: With STATIC, next variables created by '->' are static;
                   1073: - PROTECT and UNPROTECT are added to protect variables against write
                   1074: or purge actions. New PARAMETER and VARIABLE intrinsics are modified
                   1075: versions of PROTECT and UNPROTECT that only deal with global variables
                   1076: (see RCL/SAVE);
                   1077: - variable management routines have been rewritten. The new ones are
                   1078: uncompatible with the old ones. Before these changes, a local variable
                   1079: was exported to a child subroutine, but cannot be modified into this
                   1080: child subroutine. Now, a local variable is accessible only in its subroutine;
                   1081: - SAVE intrinsic is added to manipulate global variables;
                   1082: - SUSPEND is written. RPL/2 waits for a SIGCONT signal;
                   1083: - SORT, COL->, ->COL, ROW->, ROW-> intrinsics are written;
                   1084: - Makefile.am are improved;
                   1085: - minor bug is fixed in ->list and ->array. Without any argument, these
                   1086: intrinsic only send a SIGSEGV;
                   1087: - ncurses is updated to release 5.6;
                   1088: - lapack is updated to 3.1.0.
                   1089: * Sun Dec 31 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8s (RPL/2)
                   1090: - default CFLAGS/FFLAGS/FCFLAGS are modified due to a bug in gcc-sparc64
                   1091: that avoid a complete build;
                   1092: - CTRL+Z and CTRL+C signals only perform actions on main process;
                   1093: - major bugs are fixed in multitasking capabilities (some mistakes with
                   1094: mutexes and several terminated child process cannot be closed by the
                   1095: operating system);
                   1096: - minor bug fixed in SCLS (mistake between main and auxiliary axes);
                   1097: - variables are now written in rpl-core file;
                   1098: - NEG is modified to return 0 instead -0 when its argument is real or complex
                   1099: number;
                   1100: - ROW+ intrinsic can now be used on empty matrix without dimension error:
                   1101: [[]] 1 [[ 1 2 ]] row+;
                   1102: - major bug is fixed in SUB intrinsic. It only occurs with lists when
                   1103: it tries to returns invalid elements like { } 1 2 sub;
                   1104: - major bug is fixed in ROW- intrinsic;
                   1105: - major bug is fixed in ROW+ intrinsic.
                   1106: * Sat Dec 02 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8r (RPL/2)
                   1107: - creation_nom_fichier() is rewritten to force all process to create
                   1108: different file names;
                   1109: - RANLUX is removed to use GSL library and avoid a bug in gfortran-4.1;
                   1110: - readline-5.2 and units-1.86 are now used;
                   1111: - SEQUENCE statement is added in fonctions_speciales.f90 to fix a build
                   1112: failure.
                   1113: * Mon Oct 23 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8q (RPL/2)
                   1114: - wfproc is rewritten to avoid a dead lock;
                   1115: - major mistake is fixed in both sommation_vecteur_reel() and
                   1116: sommation_vecteur_complexe();
                   1117: - multitasking is rewritten from scratch to fix some mistakes with
                   1118: multithreading. DETACH, SEND and RECV now use four real time signals to
                   1119: perform a better task synchronization;
                   1120: - some bugs introduced by locales specific compilations are fixed;
                   1121: - major memory corruption is fixed in DEPND;
                   1122: - HELP intrinsic is modified to print a classified output.
                   1123: * Mon Aug 12 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8p (RPL/2)
                   1124: - major memory leak is fixed in DETACH intrinsic. Files were closed by
                   1125: both childs and parent;
                   1126: - bug that avoids usage of Motif is fixed in configure.in;
                   1127: - makefile's are modified to build RPL/2 with other locale than ISO-8859;
                   1128: - db is removed from source tree due to some compilation troubles (db's
                   1129: autoconf script is broken);
                   1130: - sdb is removed from source tree due to some memory leaks and some troubles
                   1131: with its configure script. New SQL routines are written, but only MYSQL
                   1132: subsystem is available. Now, SQL can be used without memory leak;
                   1133: - major bug is fixed in evaluation() subroutine. Value of error flag
                   1134: was not returned in some cases;
                   1135: - FACT intrinsic does not accept real arguments anymore due to the new intrinsic
                   1136: GAMMA;
                   1137: - GAMMA intrinsic is added (complex function) ;
                   1138: - autoconf/automake scripts are modified to compile F90 sources;
                   1139: - src/distributions.f is replaced by src/distributions.f90. All Numerical
                   1140: Recipes references are avoided to use GSL;
                   1141: - GSL is upgraded to 1.8 release;
                   1142: - -lz is added in src/Makefile.am to fix a mistake in sparc32.
                   1143: * Mon Apr 10 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8o (RPL/2)
                   1144: - fft.f is removed. Now FFT intrinsic uses dft subroutine;
                   1145: - Sparc64 optimizations are modified. Now gcc-4.0 can be used to build RPL/2 on
                   1146: Sparc64. Same modifications are done on sparc32;
                   1147: - major bug are fixed in both PLOTTER and HISTOGRAM intrinsics
                   1148: (interface with GNUplot).
                   1149: - major bugs are fixed in USE/REMOVE intrinsics (system stack corruption);
                   1150: - corruption of last stack is fixed in mclrin (only occurs when an error is
                   1151: caught);
                   1152: - major bug (in a malloc condition) is fixed in derivation().
                   1153: * Tue Jan 07 2006 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8n (RPL/2)
                   1154: - configure script and makefiles are modified to be usable with automake
                   1155: 1.9.6 (GNU), libtool 1.5.20 (GNU) and autoconf 2.59 (GNU).
                   1156: - gestion_fichiers() prototype is modified to be built by gfortran. Now,
                   1157: gfortran is the default compiler for FORTRAN code included in RPL/2;
                   1158: - libdb is added to perform indexed file access;
                   1159: - SQL interfaces are added (SQL intrinsic). Only mysql is supported;
                   1160: - minor bug is discovered and fixed in matrix multiplication (precision);
                   1161: - rpl.spec.in and debian directory are deleted due to some mistakes in the
                   1162: scripts required to build packages.
                   1163: * Tue Nov 15 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8m (RPL/2)
                   1164: - major bug is fixed in IFERR/THEN/(ELSE)/END structure. It occured when an
                   1165: error is caught before a regular IF/THEN/(ELSE)/END structure in
                   1166: IFERR/THEN/(ELSE)/END structure;
                   1167: - chmod 755 debian/rules is done by makefile;
                   1168: - major bug is fixed in recherche_instruction_suivante():
                   1169: +++"123 " str->
                   1170: +++Erreur : Argument invalide pour la commande << "123 " str-> >>
                   1171: Before this fix, it was impossible to use a command line that ends with spaces.
                   1172: * Sat Oct 29 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8l (RPL/2)
                   1173: - SELECT/CASE/DEFAULT/END is modified. Now, it is impossible to write:
                   1174: SELECT
                   1175:    <case>
                   1176:    CASE <test> THEN <expr> END
                   1177:    ...
                   1178:    DEFAULT
                   1179:    DEFAULT <- two DEFAULT's
                   1180: END
                   1181: 
                   1182: or
                   1183: 
                   1184: SELECT
                   1185:    <case>
                   1186:    CASE <test> THEN <expr> END
                   1187:    ...
                   1188:    DEFAULT
                   1189:    ...
                   1190:    CASE <test> THEN <expr> END <- CASE statement after DEFAULT
                   1191: END
                   1192: - major bug is fixed (in (unsigned char) getc()). It only occurs when RPL/2 is
                   1193: built with gcc-4.0.
                   1194: - configure.in is modified to be usable with gcc-4.0.
                   1195: * Mon Oct 3 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8k (RPL/2)
                   1196: - segmentation fault occurs in both PROMPT and INPUT when readline returns
                   1197: NULL (ctrl^D). This trouble is now fixed;
                   1198: - major bug is fixed in DATE intrinsic (julian days and reduced julian days);
                   1199: - stderr of rplpp is now caught;
                   1200: - SYSEVAL is modified to use stdin, stdout and stderr:
                   1201: ESSAI
                   1202: <<
                   1203:    // Only stdout and stderr
                   1204:     "ls" dup disp syseval
                   1205:     clmf
                   1206:    // Now with stdin ("zer\naze\n")
                   1207:     { "cat" "zer" "aze" } dup disp syseval
                   1208:     clmf
                   1209: >>
                   1210: - GSL is upgraded to 1.7.
                   1211: * Thu Sep 29 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8j (RPL/2)
                   1212: - SYSEVAL is modified. It now returns stdout and stderr in a list;
                   1213: - minor memory leak is fixed in recherche_instruction_suivante() subroutine.
                   1214: * Thu Aug 4 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8i (RPL/2)
                   1215: - internal file descriptors are modified to be usable with DUMP intrinsic;
                   1216: - VARS intrinsic is modified and now prints value of variables.
                   1217: * Thu Jul 21 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8h (RPL/2)
                   1218: - units is upgraded to 1.85 release;
                   1219: - -d flag is added in command line. Don't use this flag if you don't know
                   1220: what you do! It is only used to debug internal memory allocations;
                   1221: - internal pointers (ADR objects) are printed as 64 bits pointers to be usable
                   1222: on 64 bits wide architectures.
                   1223: * Sat apr 16 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8g (RPL/2)
                   1224: - DUMP is rewritten to be portable. It works, but without shared libraries,
                   1225: printer file, graphic files and last error. Support for this kind of objects
                   1226: shall be available as soon as possible. Warning: DUMP cannot be used in
                   1227: multiprocessing;
                   1228: - configure.in script is modified to return an error when g77 is not found;
                   1229: - a new internal type is used to handle shared libraries;
                   1230: - a major bug is discovered and fixed in recherche_type(). It only occurs
                   1231: in interactive mode ([[ 1 ]] returns a syntax error);
                   1232: - a major bug is found in simplification_arbre(). Subroutine is disabled.
                   1233: * Thu mar 17 2005 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8f (RPL/2)
                   1234: - option -r is added to restart a process from a dump file;
                   1235: - DUMP intrinsic is added. It performs synchronous checkpointing;
                   1236: - GSL is upgraded to release 1.6.
                   1237: * Wed dec 22 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8e (RPL/2)
                   1238: - Result types of PERM and COMB instrinsic are fixed;
                   1239: - RPL/2 now uses a new preprocessor due to a new 'feature' in gcc/cpp;
                   1240: - RPL/2 can now use all processors on multiprocessor workstations with
                   1241: DETACH, SEND, RECV and WFPROC new intrinsics. The first test program was:
                   1242: 
                   1243: #!/usr/local/bin/rpl -cs
                   1244: 
                   1245: MULTIPROCESSUS
                   1246: <<
                   1247:     'FONCTION' detach
                   1248:     do "B" disp until false end
                   1249: >>
                   1250: 
                   1251: FONCTION
                   1252: <<
                   1253:     do "A" disp until false end
                   1254: >>
                   1255: 
                   1256: * Sun dec 12 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8d (RPL/2)
                   1257: - major bug is discovered and fixed in analyse_notation_algebrique :
                   1258: +++'A-B-C' returned
                   1259: 1: 'A-(B-C)' instead of 1: 'A-B-C'. It is now fixed;
                   1260: - recherche_type() routine is improved to cast in name 1E5E-6 or 1.23.4.5.
                   1261: * Fri dec 7 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8c (RPL/2)
                   1262: - major bug is fixed in formateur_fichier(). Now, it is possible to use
                   1263: lists in a file record. Note that only sequential and formatted files
                   1264: are supported;
                   1265: - major bug is fixed in BACKSPACE intrinsic. It only occurs on large
                   1266: records.
                   1267: * Fri nov 26 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8b (RPL/2)
                   1268: - minor bug is fixed in IP intrinsic: when argument was real without
                   1269: fraction part, IP returned a real, not an integer;
                   1270: - minor bug is fixed in recherche_type(): it is now possible
                   1271: to enter +++<NB3 + return. RPL/2 returns a syntax error, not a acces
                   1272: violation;
                   1273: - MCLRIN (MacLaurin series) intrinsic is added;
                   1274: - TAYLR (Taylor series) instrinsic is added;
                   1275: - very minor bug is fixed in evaluation(). Sometimes, when evaluation()
                   1276: is stopped by ^C, EXIT intrinsic did not work due to a mistake in
                   1277: the internal system stack;
                   1278: - minor bug is fixed in encart.c. System error messages returned by
                   1279: this subroutine were only available in french;
                   1280: - internal RPL/2 system stack corruption is fixed. This bug only affects
                   1281: interactive and debug modes when evaluation routine returns an error;
                   1282: - symbolic derivation subroutine is now able to derivate functions;
                   1283: - minor bug is fixed in instruction_multiplication: now 'X' 1. * returns
                   1284: 'X' and not 'X*1'.
                   1285: * Thu nov 18 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8a (RPL/2)
                   1286: - ctags in src/Makefile.am is fixed;
                   1287: - first derivation subroutines are written;
                   1288: - major bug is fixed in analyse_algebrique() :
                   1289: before this patch, '3-5+4' was understand as '3-(5+4)' !
                   1290: - instruction_division() is improved and returns 0 when it evaluates
                   1291: '0/X';
                   1292: - instruction_moins() is improved and returns 'NEG(X)' when it evaluates
                   1293: '0-X'.
                   1294: * Fri nov 5 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre8 (RPL/2)
                   1295: - interface_gnuplot is modified and do not use any deprecated gnuplot
                   1296: commands. Warning, you must use gnuplot 4.0;
                   1297: - graphic output is improved. Now, it is possible to use two separated
                   1298: scales on the same 2D graph (with "main" and "auxiliary" option of SCALE
                   1299: intrinsic). For example:
                   1300: 
                   1301: #!/usr/local/bin/rpl -c
                   1302: 
                   1303: TEST
                   1304: <<
                   1305:    'X' indep
                   1306:    { X Y } autoscale
                   1307:    'SIN(X)' steq draw
                   1308:    { "auxiliary" } axes
                   1309:    { X Y } autoscale
                   1310:    'COS(X)+2' steq draw
                   1311:    { { "ticsonly" "automatic" } { "ticsonly" "automatic" } } axes
                   1312:    drax persist
                   1313: >>
                   1314: 
                   1315: - a major bug is fixed in encart.c;
                   1316: - ncurses is patched.
                   1317: * Mon nov 1 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7o (RPL/2)
                   1318: - configure script is updated;
                   1319: - splash screen is added;
                   1320: - minor bug is fixed in SYSEVAL (only occurs with SIGINT signal).
                   1321: * Sun oct 24 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7n (RPL/2)
                   1322: - stack overflows are caught.
                   1323: * Fri oct 8 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7m (RPL/2)
                   1324: - minor bug is fixed in both << and >> intrinsics. It only occurs when
                   1325: "<<" HELP or ">>" help is called;
                   1326: - DFT and IDFT are added;
                   1327: - minor bug is fixed in FFT (explicit length has to be positive);
                   1328: - MOD can be used with vectors and matrices arguments;
                   1329: - major bugs are fixed in FFT and IFFT (trouble in the computation of the
                   1330: default length of FFT). Only occur with matrices.
                   1331: * Sat aug 14 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7l (RPL/2)
                   1332: - readline is upgraded to 5.0;
                   1333: - gsl is upgraded to 1.5;
                   1334: - corrections in HELP functions.
                   1335: * Fri aug 7 2004 BERTRAND JoŽl <rpl@systella.fr> rpl-4.00pre7k (RPL/2)
                   1336: - HELP is added;
                   1337: - statistic matrix SIGMA is renamed as SDAT;
                   1338: - rpl.h is modified to workaround a bug in Cygwin environment
                   1339: (SA_NOMASK is not defined in include files);
                   1340: - overflows are tested in HMS+ and HMS-;
                   1341: - CEIL, FLOOR and IP are modified to return a correct result with huge
                   1342: arguments that cannot be stored as integers;
                   1343: - fix a minor bug in ->LIST. The LAST stack now contains all arguments
                   1344: of this intrinsic;
                   1345: - flag 32 is used with DISP;
                   1346: - major bug is fixed in ->Q intrinsic (type of argument and memory leak).
                   1347: * Fri may 21 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7j (RPL/2)
                   1348: - major bug is fixed in analyse(). CHR intrinsic cannot be called because
                   1349: I have erased a 'break' in a case statement;
                   1350: - major bug is fixed in AXES intrinsic. It only occurs when AXES is used
                   1351: with "main" or "auxiliary" option;
                   1352: - major bug is fixed in recherche_types(). With this patch, 'sin(X)' is
                   1353: now well analysed as 'SIN(X)'.
                   1354: * Thu apr 22 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7i (RPL/2)
                   1355: - major bug is discovered and fixed in formateur(). It only occurs when
                   1356: an algebraic expression is displayed with '='. In some cases, parenthesis
                   1357: are missing. Same fix in formateur_fichier();
                   1358: - a minor bug is fixed in evaluation.c that does not return any error when
                   1359: it tries to execute 'a=z' e = ;
                   1360: - new code is written in each intrinsic functions to return their required
                   1361: arguments.
                   1362: * Sun apr 14 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7h (RPL/2)
                   1363: - a minor bug is fixed in recherche_type: 1.E90 is now a real;
                   1364: - minor bug is fixed in formateur_reel(). It only occurs in STD mode:
                   1365: 1E90 was printed as 1.00000000000000E90;
                   1366: - HELP is added;
                   1367: - formateur() is fixed to properly print matrices and lists;
                   1368: - a lot of warnings due to deprecated syntax are fixed;
                   1369: - DFT is modified but not usable;
                   1370: - cosmetic bug is fixed in formateur_tex.c;
                   1371: - minor bug is fixed in FFT intrinsic (segfault when FFT is called without
                   1372: any argument).
                   1373: * Sun Jan 25 2004 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7g (RPL/2)
                   1374: - included ncurses is updated to 5.4;
                   1375: - included units is updated to 1.83c;
                   1376: - major bug is fixed in recherche_type() function. With this bug, RPL/2
                   1377: prints 'A/INV(Z+E)+R' when you enter A Z E + inv R + /;
                   1378: - DFT intrinsic is added. It returns the discrete Fourier transform of an
                   1379: array. When the length of each line is 2**n, the result is the same as
                   1380: the result of FFT;
                   1381: - minor bug is discovered and fixed in PUT and PUTI intrinsics when these
                   1382: instructions verify arguments types. It does not affect the result when
                   1383: all arguments are correct.
                   1384: * Sun Oct 19 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7f (RPL/2)
                   1385: - major bug is fixed in evaluation of both EXIT and CYCLE intrinsics. Now,
                   1386: EXIT can be used (as ABORT and KILL) to quit interactive mode of RPL/2;
                   1387: - units is updated to 1.83a release;
                   1388: - formateur_fichier.c is modified to handle unformatted files. This task
                   1389: is not completed.
                   1390: * Mon Aug 25 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7e (RPL/2)
                   1391: - CLUSR is written. It purges all global variables;
                   1392: - BESSEL intrinsic is fixed to allow the use of expressions as arguments;
                   1393: - a major bug was introduced with rpl-4.00pre7d in formateur.c. It appears
                   1394: when an algebraic expression is displayed or printed but does not affect
                   1395: computations. It is now fixed;
                   1396: - gsl is upgraded to 1.4.
                   1397: * Mon Aug 18 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7d (RPL/2)
                   1398: - algebraic expressions are now more readable when they are displayed
                   1399: (less parenthesis);
                   1400: - rplpp is modified to workaround a mistake in 'which' function (seems to appear
                   1401: on Debian distribution, but since cpp is in the default path, RPL/2 works
                   1402: fine...);
                   1403: - NOT is not correctly formatted in formateur.c:
                   1404: Z NOT -> 'NOT Z' but 'A+Z' NOT -> 'NOT A+Z' and 'NOT Z+A' -> 'NOTZ+A'
                   1405: with a NOTZ function !
                   1406: * Sun Aug 10 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7c (RPL/2)
                   1407: - CYCLE is fixed. Now, it is possible to use CYCLE in an expression even
                   1408: if the main loop is in a program;
                   1409: - RPL/2 is tested with efence and valgrind;
                   1410: - configure.in script is modified;
                   1411: - units.c is modified to be built by gcc-3.3. I only have removed a #if 0/#endif
                   1412: structure. I don't know why this code was compiled by gcc-3.3... Maybe
                   1413: another gcc bug...
                   1414: * Fri Jul 25 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7b (RPL/2)
                   1415: - EXIT is fixed. Now, it is possible to use EXIT in an expression when the
                   1416: main loop is in a program;
                   1417: - RPL/2 can take its arguments (and command) on the standard input. Try
                   1418: echo "1 2 3 + *" | rpl -i | grep "^1:" | cut -d ':' -f2
                   1419: - a minor bug in vim syntax file is fixed (CYCLE and EXIT intrinsics);
                   1420: - a minor bug is discovered in analyse_algebrique(). Now, expression
                   1421: such as 'A+Z AND 2' or '(A+Z) AND 2' are correctly parsed.
                   1422: * Mon Jun 16 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7a (RPL/2)
                   1423: - Major bug is fixed in evaluation subroutine. This one only occurs
                   1424: when an error in a user definition called by an expression is caught
                   1425: by an IFERR structure;
                   1426: - EXIT intrinsic can now be used in DO/UNTIL/END or WHILE/REPEAT/END loops;
                   1427: - sequenceur() is now uninterruptible with STOP signal in recherche_type()
                   1428: subroutine;
                   1429: - major bug is fixed in types.c (# xxxxxb) and recherche_instruction_suivante();
                   1430: - GSL exception (underflow) is now caught;
                   1431: - tools/Makefile.am is fixed;
                   1432: - Debian buildpackage script is fixed.
                   1433: * Tue Jun 10 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre7 (RPL/2)
                   1434: All memory leaks issued from the pre6 beta releases seem to be fixed.
                   1435: Build process is improved and vim syntax file and manual pages are updated.
                   1436: * Mon Jun 9 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6l (RPL/2)
                   1437: - RCI and RCIJ intrinsic are added;
                   1438: - BESSEL intrinsic is added. Syntax:
                   1439: 3: type ("J", "K", "I", "Y", "j", "k", "i", "y")
                   1440: 2: order (integer or real)
                   1441: 1: x;
                   1442: - ->Q intrinsic is added;
                   1443: - major bug is fixed in C->R intrinsic;
                   1444: - ROW+ and ROW- are added and tested;
                   1445: - COL+ and COL- are added and tested. Syntax:
                   1446: 3: matrix
                   1447: 2: integer (number of column to be inserted)
                   1448: 1: column matrix to be inserted;
                   1449: - major bug was discovered in interface_gnuplot(). It only occurs when
                   1450: the subroutine reduces the graphical depth. It is now fixed;
                   1451: - Some mistakes are been fixed in vim syntax file;
                   1452: - SX2, SY2 and SXY are added;
                   1453: - SX and SY statistical intrinsics are added;
                   1454: - DEBIAN control file is fixed;
                   1455: - PAPER intrinsic is added. Supported paper formats are now : a4, a5, b5,
                   1456: letter, legal, executive;
                   1457: - PPAR is modified to include current graphic type.
                   1458: * Sun Jun 1 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6k (RPL/2)
                   1459: - SLICESCALE intrinsic is added. Its syntax is
                   1460: { "automatic" nb_of_levels }
                   1461: { "discrete" l1 l2 l3 ... }
                   1462: { "incremental" start incr }
                   1463: { "incremental" start incr end }
                   1464: { "automatic" } (default);
                   1465: - a minor bug (in last stack) is fixed in AXES intrinsic
                   1466: - flag 52 is used to automatically update graphics;
                   1467: - man pages are updated;
                   1468: - evaluation() is modified to perform evaluation of expressions that contain
                   1469: '=';
                   1470: - a minor bug is fixed in AXES intrinsic;
                   1471: - a minor bug is fixed in DRAW intrinsic (2D and 3D graphics were able to
                   1472: appear on the same figure). The same mistake is fixed in DRWS intrinsic;
                   1473: - LAST is disabled in evaluation subroutine (EVAL and ->NUM intrinsics).
                   1474: * Sun May 18 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6j (RPL/2)
                   1475: - SLICE intrinsic is added. It is used to draw 3D graphics as contour lines;
                   1476: - PLOTTER is added to draw statistical clouds with lines;
                   1477: - C and H source files now include vim parameters;
                   1478: - vim syntax file is modified to include new intrinsics;
                   1479: - static archive is modified to include all required libraries needed by
                   1480: RPL/2.
                   1481: * Sun May 4 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6i (RPL/2)
                   1482: - '=' is added and tested;
                   1483: - XCOL and YCOL are added;
                   1484: - a minor bug in analyse_syntaxique() is fixed;
                   1485: - THEN is modified to return an error when ELSE appears in a CASE/THEN/END
                   1486: structure. ELSE is modified to return an error when ELSE appears in
                   1487: an ELSE/END structure;
                   1488: - a major bug is fixed in CYCLE;
                   1489: - EXIT is written. When EXIT appears in a defined loop (FOR or START), the
                   1490: sequencer continues after the end of this loop;
                   1491: - SCLS is added;
                   1492: - DRWS now uses COLS to draw 2D graphics;
                   1493: - PPAR and SPAR are written. SPAR returns a list that contains the
                   1494: size of the statistical matrix (or "UNAVALAIBLE" if there is any
                   1495: statistical variable, or "DISABLED" if its type is not one of the type of
                   1496: a statistical matrix.) and XCOL and YCOL parameters. Warning: [[]] SIZE
                   1497: returns { 1 0 } and it is not a bug, because a null matrix contains _one_
                   1498: null line ! Thus, [[]] STOS SPAR returns { { 1 0 } 1 2 };
                   1499: - EXTERNAL intrinsic is added. Warning: by default, extern functions are
                   1500: disabled. Arguments of EXTERNAL are case sensitive because the external
                   1501: interface is written in C. { ext_sinus } EXTERNAL does not replace the list
                   1502: of known external functions but add the new list to the last. { "all" }
                   1503: EXTERNAL allows all external functions and { "none" } EXTERNAL removes all
                   1504: external names of the known functions;
                   1505: - mkrplso.in is modified.
                   1506: * Sun Apr 20 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6h (RPL/2)
                   1507: - vim syntax file is upgraded;
                   1508: - a minor mistake is fixed in recherche_instruction_suivante();
                   1509: - some minor memory leaks are fixed in recherche_type() function. They only
                   1510: occurs when a syntax error is detected;
                   1511: - #error and #warning preprocessor macros are added;
                   1512: - INCR and DECR are written (with integer or variable argument);
                   1513: - CSWP and RSWP are added and tested;
                   1514: - a minor bug is fixed in analyse.c;
                   1515: - DEBIAN/control is added to build debian package;
                   1516: - SCALE is fixed and improved ("automatic" keyword);
                   1517: - PUTC and PUTR new intrinsics are added.
                   1518: * Sun Apr 13 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6g (RPL/2)
                   1519: - a very minor bug is fixed in VISIT intrinsic. It only occurs when
                   1520: VISIT does not find a name in level 1;
                   1521: - configure.in script is modified to add a new test (--enable-debug
                   1522: flag). Configured with this fleg, RPL/2 will be built with electric-fences;
                   1523: - GETR (get row[s]) and GETC (get column[s]) are added. These new instructions
                   1524: extract a part of a matrix. Syntax: [[ 1 2 3 ][ 2 3 4 ]] { 1 } GETR or
                   1525: 'MATRIX' { 2 2 3 } GETR;
                   1526: - LOGSCALE intrinsic is improved and now, it can be used as
                   1527: { "main" "auxiliary" X Y } LOGSCALE;
                   1528: - SCALE intrinsic is used to fix the limits of a graphic. Its syntax is the
                   1529: same than AXES:
                   1530: { { 60 "ticsonly" 2 } { "automatic" "ticsonly" 10 } } axes
                   1531: { "auxiliary" { 60 "ticsonly" "default" } { "automatic" } } axes
                   1532: { { -10 10 } "automatic" } SCALE.
                   1533: Warning, it is not possible to ask a logarithmic scale with this intrinsic
                   1534: because it changes only the dimension of the screen. To have a logarithmic
                   1535: scale, you must use LOGSCALE intrinsic:
                   1536: { X } LOGSCALE gives a semi-log screen, { "auxiliary" X Y } gives a log-log
                   1537: screen on second scale;
                   1538: - { X X } autoscale and { Y Y } logscale are now invalid;
                   1539: - *D is added (depth multiplication, for 3D graphics);
                   1540: - a new intrinsic (*S) is added. It changes the scale of a graphic (X, Y
                   1541: and Z axes). The result of *S is the same than DUP DUP *H *W *D;
                   1542: - a major bug is fixed in GETI instrinsic when it is used with a name
                   1543: that contains a matrix or a vector (bad upper bounds conditions in
                   1544: incrementation);
                   1545: - DISP intrinsic now uses the 33-th flag. When it is not set
                   1546: (default), a final carriage return is sent to the terminal;
                   1547: - AXES intrinsic only takes a list that can contains the keywork
                   1548: "main" or "auxiliary". Before this modification, this keyword was in
                   1549: the first stack level;
                   1550: - vim syntax file is upgraded;
                   1551: - in appel_gnuplot(), stdin is closed when gnuplot is called with -raise
                   1552: option;
                   1553: - LAST is now disabled in the main loop of INT intrinsic;
                   1554: - expm1 and lnp1 are rewritten to use expm1 and log1p from math.h.
                   1555: * Sun Apr 6 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6f (RPL/2)
                   1556: - a major bug is fixed in evaluation() subroutine. It occurs with DRAW
                   1557: intrinsic when the equation cannot be evaluated (for example 'SIN(X)/X'
                   1558: in 0);
                   1559: - LAST is disabled in the main loop of DRAW intrinsic;
                   1560: - a major bug is fixed in DRAW intrinsic. When an error occurs in the
                   1561: evaluation of an equation, the system stack is returned corrupted to the
                   1562: sequencer;
                   1563: - the same minor bug is fixed in FOR and START. It only occurs when the limits
                   1564: of a loop are not integer or real.
                   1565: * Sun Mar 31 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6e (RPL/2)
                   1566: - the compilation stage aborts with an error message when two definitions
                   1567: have the same name. To improve the compilation() subroutine, I have to
                   1568: add some tests in gestion_variables.c;
                   1569: - recherche_type() subroutine ad some other connex subroutines are improved.
                   1570: Now, some syntax errors about object are caught and do not perform sequencer
                   1571: hangup;
                   1572: - readline is upgraded (minor compilation bug with recent gcc);
                   1573: - Makefile.am's and configure.in scripts are improved.
                   1574: * Fri Mar 14 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6d (RPL/2)
                   1575: - DRWS intrinsic is written. Two datastyles are associated: SCATTER (2D
                   1576: and 3D) and HISTOGRAM (only 2D, but 3 columns are accepted, the third shown
                   1577: the boxwidth, 1 by default);
                   1578: - recherche_type() is rewritten to be faster;
                   1579: - gsl is upgraded (release 1.3);
                   1580: - ncurses is upgraded and patched (release 5.3);
                   1581: - recherche_instruction_suivante() is fixed (string research with included
                   1582: '"') and rewritten to be faster;
                   1583: - appel_gnuplot() is fixed. When no graphic was available, it returned a
                   1584: segfault.
                   1585: * Sun Mar 9 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6c (RPL/2)
                   1586: - RPL/2 is compiled by gcc-3.2.2 and seems to work;
                   1587: - the same minor bug is fixed in REDRAW and DRAX functions;
                   1588: - a minor fix is written in DRAW function (2D and 3D);
                   1589: - AXES intrinsic is improved. Now { { pi "ticsonly" 4 } "automatic" } DRAX
                   1590: is accepted;
                   1591: - a minor bug is fixed in VISIT intrinsic.
                   1592: * Sun Jan 26 2003 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6b (RPL/2)
                   1593: - a minor bug is fixed in evaluation subroutine;
                   1594: - vim syntax file is improved;
                   1595: - DRAW (wireframe section) is fixed. When an error occurs in the evaluation
                   1596: of a 3D-graphic (for example 'SIN(R)/R' with 'R=SQRT(X**2+Y**2)' in X=0 and
                   1597: Y=0), no graph was procuced (it results from a bug in gnuplot, and this fix
                   1598: is a quick and dirty workaround...);
                   1599: - RETURN intrinsic is modified to fix a trouble in interactive mode;
                   1600: - rplconvert is improved.
                   1601: * Sun Dec 22 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6a (RPL/2)
                   1602: - a memory leak is fixed in formateur.c that only occurs when RPL/2 try
                   1603: to print a list that contains a name;
                   1604: - a major bug is fixed in -> intrinsic that only occurs in evaluation case with
                   1605: a algebraic expression (<< 1 -> X 'X+1' >> eval);
                   1606: - vim syntax file is improved;
                   1607: - RPL/2 can now be built by gcc 3.2.1;
                   1608: - "**" can be used in algebraic expression;
                   1609: - DRAW can now plot wireframe (3D) graphics.
                   1610: * Sun Dec 8 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre6 (RPL/2)
                   1611: - ncurses is patched to be compiled by gcc 3.2;
                   1612: - purification_chaine is rewritten to fix a major bug (when 'chaine' is empty);
                   1613: - a major bug is fixed in recherche_instruction_suivante();
                   1614: - minor bug is fixed in rpl-core file. The error message is now correctly
                   1615: written;
                   1616: - minor bug is fixed in analyse_notation_algebrique.c and types.c.
                   1617: Now, an expression such as 'A+' returns an error when it is analyzed;
                   1618: - VISIT intrinsic is added;
                   1619: - a major memory leak is fixed in evaluation.c. This bug rarely occurs in
                   1620: normal mode.
                   1621: * Sun Aug 25 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5e (RPL/2)
                   1622: - an EDIT intrinsic is added;
                   1623: - PRMD intrinsic returns french or english messages;
                   1624: - rpl-core now call LAST intrinsic if the last stack is avalaible. It
                   1625: contains the error message too;
                   1626: - new syntax, ftplugin and indent files are written for vim text editor;
                   1627: - major bug is found and fixed in RCL intrinsic;
                   1628: - major bug is found and fixed in OR intrinsic.
                   1629: * Mon Jul 29 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5d (RPL/2)
                   1630: - ncurses is updated;
                   1631: - minor bug is fixed on PURGE instruction (an error no caught was
                   1632: returned in interactive mode).
                   1633: * Mon Jul 21 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5c (RPL/2)
                   1634: - ASL (arithm. shift left) is added.
                   1635: * Thu Jul 11 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5b (RPL/2)
                   1636: - ncurses is patched;
                   1637: - gsl is added to perform arithmetic operations;
                   1638: - units is patched;
                   1639: - some very minor bugs have been fixed.
                   1640: * Wed May 15 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5a (RPL/2)
                   1641: - ncurses is patched;
                   1642: - RPL/2 can now be built by gcc 3.1;
                   1643: - RDZ is fixed (minor bug).
                   1644: * Sun Apr 21 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre5 (RPL/2)
                   1645: - RPL/2 can now be called from other languages (librpl libraries).
                   1646: * Sun Mar 24 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4h (RPL/2)
                   1647: - ERRN and ERRM can now be used with errors returned by external functions;
                   1648: - readline and ncurses have been updated;
                   1649: - no more bugs have been reported since the rpl-4.00pre4g release.
                   1650: * Wed Feb 20 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4g (RPL/2)
                   1651: - ERRN and ERRM intrinsic functions are written. They return the last
                   1652: error number or message even if errors are caught by an IFERR structure;
                   1653: - a minor bug is fixed in EPSILON intrinsic. Now, 'EPSILON(0)' returns
                   1654: a non null value;
                   1655: - Ncurses is updated.
                   1656: * Mon Feb 18 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4f (RPL/2)
                   1657: Arithmetic intrinsic instructions (- +, -, *, / and **) are improved :
                   1658: 'X' 0 + and 0 'X' + return 'X';
                   1659: 'X' 0 - returns 'X';
                   1660: 'X' 1 * and 1 'X' * return 'X';
                   1661: 'X' 0 * and 0 'X' * returns 0; 
                   1662: 'X' 1 / returns 'X';
                   1663: 'X' 1 ** returns 'X';
                   1664: 'NEG(X)' NEG returns 'X';
                   1665: - autoconf/automake scripts are improved: now, the size of the different types
                   1666: found by configure are used in rpltypes.h (rplconfig.h is written by configure);
                   1667: - rdynamic flag is added in src/Makefile.am. This flag is used in the first
                   1668: makefile, but forgotten in the new process;
                   1669: - Flag 31 is tested before saving any arguments in bibliotheques_externes.c;
                   1670: - POS can now be used on lists;
                   1671: - ELSILON is written. This function returns the smallest real e(x) such as
                   1672: e+abs(x) != abs(x).
                   1673: * Mon Feb 11 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4e (RPL/2)
                   1674: - now, INT intrinsic function can be interrupted;
                   1675: - precision of sommation_vecteur_xxx() subroutines is improved;
                   1676: - new vim syntax file written for vim 6.0.
                   1677: * Mon Feb 04 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4d (RPL/2)
                   1678: - explicit error messages are now printed when the RPL/2 is used in
                   1679: interactive mode;
                   1680: - major bug is fixed in OPEN intrinsic: with 'REPLACE' status, file lock was
                   1681: tested after the file is opened, thus, when the file was locked, it was
                   1682: deleted too!;
                   1683: - configure script is improved (and it seems to be good ;-) );
                   1684: - An --disable-experimental flag is added to the configure script. Thus, even
                   1685: if you compile a beta release, you can compile a stable RPL/2;
                   1686: - new syntax and ftplugin written for vim 6.0.
                   1687: * Wed Jan 30 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4c (RPL/2)
                   1688: - configure script is improved.
                   1689: * Sun Jan 27 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4b (RPL/2)
                   1690: - ncurses now replaces termcap;
                   1691: - CŰme DESPLATS has written a configure script.
                   1692: * Fri Jan 18 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4a (RPL/2)
                   1693: - KIND is added and returns the type of the numerical argument ;
                   1694: - history file is added.
                   1695: * Tue Jan 15 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre4 (RPL/2)
                   1696: - Stable release. Unformatted files are disabled in this release.
                   1697: * Mon Jan 14 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3h (RPL/2)
                   1698: - SIGTSTP (CTRL+Z) is added. In a script, a SIGTSTP signal signifies
                   1699: that the RPL/2 seqencer must stop and must give a prompt. This
                   1700: signal is an asynchonous "HALT" command;
                   1701: - SIGINT (CTRL+C) variables stack corruption is fixed;
                   1702: - IFERR seems to be fixed (in equation evaluation routine);
                   1703: - Memory leak is fixed (ADR object type);
                   1704: - DATE returns both date and hours;
                   1705: - TIME now returns user and system CPU times;
                   1706: - MEM is added.
                   1707: * Thu Jan 10 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3g (RPL/2)
                   1708: - Makefile is improved to support sparc v7 (sun4c), sparc v8 (sun4m) and
                   1709: sparc v9 (sun4u). Now, RPL/2 can be built on i386 (i486 is known as i386),
                   1710: i586, i686, K6, K7, alpha ev4, alpha ev5, alpha ev56, alpha ev6, sparc v7,
                   1711: sparc v8 and sparc v9. Compilation of RPL/2 on my Sun Sparc 2 (sun4c,
                   1712: CPU 4/75, 64 MB, 40 MHz with FPU) is a very great mission :
                   1713: 
                   1714: Newton:[~/rpl/rpl] > time make install
                   1715: ...
                   1716: real    338m39.623s
                   1717: user    324m32.290s
                   1718: sys     10m47.380s
                   1719: Newton:[~/rpl/rpl] >
                   1720: 
                   1721: I don't know if you will compile this language on old worstations, but
                   1722: it is usable ;-) ;
                   1723: - SYSEVAL is improved. An external program can be called without any shell.
                   1724: Thus, even if the sticky bit is set, RPL/2 can not give a shell root when
                   1725: a SYSEVAL command crashes;
                   1726: - minor bug is fixed in recherche_type() (# xxxxb parsing);
                   1727: - presence of bootstrap entry point is verified before launching the
                   1728: sequencer;
                   1729: - minor bug is fixed in formateur_tex() (underscore in mathematical
                   1730: expression);
                   1731: - Lapack is updated.
                   1732: * Thu Jan 3 2002 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3f (RPL/2)
                   1733: - IFERR is now known in an expression, but not usable.
                   1734: * Mon Dec 31 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3e (RPL/2)
                   1735: - several bugs are fixed.
                   1736: * Mon Dec 17 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3d (RPL/2)
                   1737: - major bugfix in file locking.
                   1738: * Fri Dec 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3c (RPL/2)
                   1739: - minor fixes is system() call.
                   1740: * Fri Nov 30 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3b (RPL/2)
                   1741: - automatic limitation of the graphical depth due to a limitation (bug ?)
                   1742: of gnuplot.
                   1743: * Mon Nov 19 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3a (RPL/2)
                   1744: - new file temp management.
                   1745: * Sun Nov 18 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre3 (RPL/2)
                   1746: - memory leak is fixed in STO instruction;
                   1747: - minor bug in file management is fixed;
                   1748: - BACKSPACE is added;
                   1749: - VARS is added;
                   1750: - file locks are improved.
                   1751: * Wed Nov 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2l (RPL/2)
                   1752: - major bug is fixed (on sparc architecture) and RPL/2 can now run
                   1753: on sparc stations;
                   1754: - INDEP and DEPND are improved;
                   1755: - AXES is added;
                   1756: - WRITE, APPEND and REWIND are added.
                   1757: * Sun Nov 11 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2k (RPL/2)
                   1758: - write is improved ;
                   1759: - major bug is found and fixed in copie_objet() with struct_fichier;
                   1760: - minor bug is fixed in OPEN function;
                   1761: - minor bug is fixed in analyse_syntaxique() subroutine. All commands
                   1762: are analysed before starting their executions.
                   1763: * Thu Nov 8 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2j (RPL/2)
                   1764: - minor bug is fixed in appel_gnuplot();
                   1765: - RPL/2 can work without LANG variable.
                   1766: * Wed Oct 31 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2i (RPL/2)
                   1767: - WAIT function is improved (removing the polling function);
                   1768: - LAST stack is not active (default) when rpl is called without the option -i.
                   1769: In all other cases, LAST stack is active;
                   1770: - Labels can be added on a gnuplot output (function LABEL);
                   1771: - LCD-> and ->LCD are added.
                   1772: * Sun Oct 21 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2h (RPL/2)
                   1773: - minor bug is fixed in TeX output (pi);
                   1774: - new english manual is added.
                   1775: * Wed Oct 16 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2g (RPL/2)
                   1776: - LOCK, WFLOCK and UNLOCK are added. A file is locked when it is opened;
                   1777: - VERSION function is added. It returns the version number of the interpreter;
                   1778: - minor bug is fixed in evaluation subroutine;
                   1779: - english error messages are been fixed.
                   1780: * Tue Oct 09 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2f (RPL/2)
                   1781: - interrupt subroutine is added;
                   1782: - formatted files support is continued.
                   1783: * Sun Sep 30 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2e (RPL/2)
                   1784: - formateur_fichier.c is added to perform formatted files write.
                   1785: * Thu Sep 27 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2d (RPL/2)
                   1786: - minors bugfixes in FIX format in formateur_reel() subroutine;
                   1787: - new manual page in english;
                   1788: - FORMAT intrinsic is added and can read any format for "formatted" file.
                   1789: * Sun Sep 23 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2c (RPL/2)
                   1790: - OPEN, CLOSE, SYNC, INQUIRE, CREATE and DELETE are tested;
                   1791: - a man page in the first manual section is written.
                   1792: * Thu Sep 20 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2b (RPL/2)
                   1793: - major bugfixes in recherche_type() subroutine: sometimes in interactive mode,
                   1794: this routine was be able to forget the last element of a list, a vector or
                   1795: a matrix.
                   1796: * Mon Sep 17 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2a (RPL/2)
                   1797: - OPEN, CLOSE and DELETE are known by the language but not very usable;
                   1798: - minor bugfixes in evaluation routine.
                   1799: * Sun Sep 16 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre2 (RPL/2)
                   1800: - major bugfixes in evaluation routine.
                   1801: * Sat Sep 15 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1d (RPL/2)
                   1802: - conditional structures can be used in equations.
                   1803: * Fri Sep 14 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1c (RPL/2)
                   1804: - Minor bugfixes in makefile.
                   1805: * Sat Sep  8 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1b (RPL/2)
                   1806: - CONVERT is written;
                   1807: - CYCLE, FOR/NEXT, FOR/STEP, START/NEXT, START/STEP, DO/UNTIL/END and
                   1808: WHILE/REPEAT/END can now be used in an equation;
                   1809: - I fix some troubles with evaluation subroutine;
                   1810: - db3 library is added.
                   1811: * Thu Sep  6 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1a (RPL/2)
                   1812: - add rplconvert and rplunits sources;
                   1813: - add CONVERT definition (but it does not work).
                   1814: * Mon Sep  3 2001 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre1 (RPL/2)
                   1815: - initial public release (GPL).
                   1816: * Thu Apr  2 1998 BERTRAND JoŽl <rpl2@systella.fr> rpl-4.00pre0 (RPL/2)
                   1817: - RPL is rewritten from scratch and named RPL/2.
                   1818: #* 1992 BERTRAND JoŽl rpl-3.02 (RPL-387)
                   1819: #- minor bugfixes.
                   1820: #* 1991 BERTRAND JoŽl rpl-3.01 (RPL-387)
                   1821: #- arithmetic processor support is added to improve global performances.
                   1822: #* 1991 BERTRAND JoŽl rpl-3.00 (RPL-386)
                   1823: #- idem... but on an i386DX...
                   1824: #* 1990 BERTRAND JoŽl rpl-2 (RPL-6809)
                   1825: #- a new release on a more powerfull processor and with new functions and an
                   1826: #built-in editor. It has been written on a SMT-Goupil G3-6809 running
                   1827: #Flex9 (320 KB of RAM and a graphic card used to draw 512*256 graphics in
                   1828: #8 colors)
                   1829: #* 1989 BERTRAND JoŽl rpl-1 (RPL-6502)
                   1830: #- initial release (only an historic interest) written on an ORIC Atmos 48K.
                   1831: #No graphic was provided.

CVSweb interface <joel.bertrand@systella.fr>