ncurses 6.2 - patch 20210403

[ncurses.git] / ANNOUNCE

diff --git a/ANNOUNCE b/ANNOUNCE
index 858c7f2fb3cbca9f3cf2023749859fe7560fa1b6..e0603d622394c8420f71cd0465476b18b41749df 100644 (file)
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-                            Announcing ncurses 6.0
+                            Announcing ncurses 6.2

 
 Overview
 
 
 Overview
 


@@ -6,8 +6,8 @@ Overview
    curses  in  System  V  Release  4.0 (SVr4), and more. It uses terminfo
    format,  supports  pads  and  color  and multiple highlights and forms
    characters and function-key mapping, and has all the other SVr4-curses
    curses  in  System  V  Release  4.0 (SVr4), and more. It uses terminfo
    format,  supports  pads  and  color  and multiple highlights and forms
    characters and function-key mapping, and has all the other SVr4-curses

-   enhancements  over  BSD  curses.  SVr4 curses is better known today as
-   X/Open Curses.
+   enhancements  over  BSD curses. SVr4 curses became the basis of X/Open
+   Curses.

 
    In  mid-June  1995,  the  maintainer of 4.4BSD curses declared that he
    considered  4.4BSD curses obsolete, and encouraged the keepers of unix
 
    In  mid-June  1995,  the  maintainer of 4.4BSD curses declared that he
    considered  4.4BSD curses obsolete, and encouraged the keepers of unix


@@ -17,7 +17,7 @@ Overview
      * It is used in almost every system based on the Linux kernel (aside
        from some embedded applications).
      * It  is  used  as the system curses library on OpenBSD, FreeBSD and
      * It is used in almost every system based on the Linux kernel (aside
        from some embedded applications).
      * It  is  used  as the system curses library on OpenBSD, FreeBSD and

-       OSX.
+       MacOS.

      * It  is used in environments such as Cygwin and MinGW. The first of
        these was EMX on OS/2 Warp.
      * It is used (though usually not as the system curses) on all of the
      * It  is used in environments such as Cygwin and MinGW. The first of
        these was EMX on OS/2 Warp.
      * It is used (though usually not as the system curses) on all of the


@@ -26,440 +26,374 @@ Overview
      * It should work readily on any ANSI/POSIX-conforming unix.
 
    The distribution includes the library and support utilities, including
      * It should work readily on any ANSI/POSIX-conforming unix.
 
    The distribution includes the library and support utilities, including

-     * [1]captoinfo, a termcap conversion tool
-     * [2]clear, utility for clearing the screen
-     * [3]infocmp, the terminfo decompiler
-     * [4]tabs, set tabs on a terminal
-     * [5]tic, the terminfo compiler
-     * [6]toe, list (table of) terminfo entries
-     * [7]tput,  utility  for  retrieving  terminal capabilities in shell
+     * captoinfo, a termcap conversion tool
+     * clear, utility for clearing the screen
+     * infocmp, the terminfo decompiler
+     * tabs, set tabs on a terminal
+     * tic, the terminfo compiler
+     * toe, list (table of) terminfo entries
+     * tput,  utility  for  retrieving  terminal  capabilities  in  shell

        scripts
        scripts

-     * [8]tset, to initialize the terminal
+     * tset, to initialize the terminal

 
    Full manual pages are provided for the library and tools.
 
 
    Full manual pages are provided for the library and tools.
 

-   The  ncurses  distribution  is  available via anonymous FTP at the GNU
-   distribution site
+   The ncurses distribution is available at ncurses' homepage:

 
 

-     [9]ftp://ftp.gnu.org/gnu/ncurses/ .
+     ftp://ftp.invisible-island.net/ncurses/ or
+     https://invisible-mirror.net/archives/ncurses/ .

 
 

-   It is also available at
+   It is also available via anonymous FTP at the GNU distribution site

 
 

-     [10]ftp://invisible-island.net/ncurses/ .
+     ftp://ftp.gnu.org/gnu/ncurses/ .

 
 Release Notes
 
 
 Release Notes
 

-   These notes are for ncurses 6.0, released August 8, 2015.
+   These notes are for ncurses 6.2, released February 12, 2020.

 
    This  release  is  designed  to  be source-compatible with ncurses 5.0
 
    This  release  is  designed  to  be source-compatible with ncurses 5.0

-   through  5.9;  providing  a  new  application  binary interface (ABI).
-   Although  the  source can still be configured to support the ncurses 5
-   ABI,  the  intent  of  the  release is to provide extensions which are
-   generally useful, but binary-incompatible with ncurses 5:
-     * Extend  the  cchar_t  structure to allow more than 16 colors to be
-       encoded.
-     * Modify  the  encoding  of mouse state to make room for a 5th mouse
-       button.  That  allows  one  to use ncurses with a wheel mouse with
-       xterm or similar X terminal emulators.
-
-   There are, of course, numerous other improvements, including
-     * fixes made based on the Clang and Coverity static analyzers.
-     * memory leak fixes using Valgrind
-
-   The  release  notes  mention  some  bug-fixes,  but are focused on new
-   features  and  improvements to existing features log since ncurses 5.9
-   release.
-
-   While  the intent of the release is to provide a new stable ABI, there
-   are other development activities which are summarized below.
-     * The  original  release  plan,  e.g., for "5.10" was to improve the
-       MinGW port. Ultimately that was completed (wide-character support,
-       mouse,  etc),  but  was  deferred  to focus on termcap support and
-       performance  issues.  Also, pinpointing the problems with Console2
-       took a while.
-     * A  review  of  termcap  compatibility in 2011 led to several minor
-       fixes  in  the  library  and improvements to utilities. To do this
-       properly,  a  review of the various extent termcap implementations
-       was needed.
-       The [11]termcap library checker (tctest) (not part of ncurses) was
-       one    result.    A   followup   review   of   performance   using
-       [12]ncurses-examples in 2014 led to additional improvements.
-     * Output buffering provided a further, but worthwhile distraction. A
-       bug  report  in  2012  regarding  the  use  of  signal handlers in
-       ncurses)  pointed  out  [13]a  problem  with  the  use  of  unsafe
-       functions  for  handling SIGTSTP. Other signals could be addressed
-       with workarounds; repairing SIGTSTP required a different approach.
-       The  solution  required changing internal behavior of the library:
-       how it handles output buffering.
-       Now  ncurses buffers its own output, independently of the standard
-       output.  A few applications relied upon the library's direct reuse
-       of  the  standard  output  buffering;  however that is unspecified
-       behavior  and  has  never been a recommended practice. Identifying
-       these  applications  as  well  as  refining  the  change to permit
-       low-level applications to work consistently took time.
-     * Since  the introduction of the experimental support for 256 colors
-       early  in  [14]2005  (released in [15]ncurses 5.5), there has been
-       increased  user  interest. Almost all packagers continue providing
-       the ncurses ABI 5 which cannot support 256 colors.
-     * Symbol  versioning,  or  the  lack  of  it in ncurses, is the main
-       reason why packagers would be reluctant to add a new ncurses ABI.
-       This  release  provides  the  new  ABI along with script-generated
-       lists  of versioned symbols which can be used for both ABI 5 and 6
-       (with  distinct names to keep the two separate). This took time to
-       development, as reported in [16]Symbol versioning in ncurses.
+   through  6.1; providing extensions to the application binary interface
+   (ABI).  Although  the  source  can  still be configured to support the
+   ncurses  5  ABI, the reason for the release is to reflect improvements
+   to the ncurses 6 ABI and the supporting utility programs.
+
+   There  are,  of  course,  numerous  other improvements, listed in this
+   announcement.
+
+   The  most  important  bug-fixes/improvements  dealt  with user-defined
+   capabilities  in terminal descriptions. The release notes also mention
+   some other bug-fixes, but are focused on new features and improvements
+   to existing features since ncurses 6.1 release.

 
   Library improvements
 
 
   Library improvements
 

-  Output buffering
-
-   X/Open curses provides more than one initialization function:
-     * [17]initscr (the simplest) accepts no parameters.
-     * [18]newterm accepts parameters for the stream input and output
-     * [19]setupterm (the low-level function) accepts a parameter for the
-       file descriptor of the output.
-
-   They are documented in X/Open as if initscr calls newterm using stdout
-   for   output  stream,  and  in  turn  newterm  calls  setupterm  using
-   fileno(stdout)  for  the file descriptor. As long as an implementation
-   acts  as if it does this, it conforms. In practice, implementations do
-   what  is  implied.  This  creates  a  problem: the low-level setupterm
-   function's  file  descriptor  is  unbuffered,  while  newterm  implies
-   buffered  output.  X/Open  Curses says that all output is done through
-   the  file  descriptor,  and  does  not  say  how  the output stream is
-   actually used.
-
-   Initially,  ncurses used the file descriptor (obtained from the output
-   stream  passed to newterm) for changing the terminal modes, and relied
-   upon  the  output  parameter of newterm for buffered output. Later (to
-   avoid  using  unsafe  buffered  I/O  in  signal handlers), ncurses was
-   modified  to use the file descriptor (unbuffered output) when cleaning
-   up  on receipt of a signal. Otherwise (when not handling a signal), it
-   continued to use the buffered output.
-
-   That  approach  worked reasonably well and as a side effect, using the
-   same buffered output as an application might use for printf meant that
-   no   flushing   was   needed   when   switching  between  normal-  and
-   screen-modes.
-
-   There were a couple of problems:
-     * to get good performance, curses (not only ncurses, but SVr4 curses
-       in general) set an output buffer using setbuf or similar function.
-       There  is no standard (or portable) way to turn that output buffer
-       off,  and  revert  to  line-buffering.  The  [20]NCURSES_NO_SETBUF
-       environment variable did make it optional.
-     * to  handle SIGTSTP (the "stop" signal), ncurses relied upon unsafe
-       functions.  That  is,  due  to  the  complexity of the feature, it
-       relied  upon reusing existing functions which should not have been
-       called via the signal handler.
-
-   Conveniently, solving the second problem (by making ncurses do its own
-   output  buffering)  also  fixed  the first one. But there were special
-   cases to resolve: [21]low-level functions such as mvcur, putp, vidattr
-   explicitly  use  the  standard  output.  Those  functions  were reused
-   internally, and required modification to distinguish whether they were
-   used by the high-level or low-level interfaces.
-
-   Finally, there may still be a few programs which should be modified to
-   improve their portability, e.g., adding an
-
-fflush(stdout);
-
-   when  switching  from "[22]shell" mode to "[23]program" (curses) mode.
-   Those are fairly rare because most programmers have learned not to mix
-   printf and [24]printw.
-
-  Symbol versioning
-
-   This  release  introduces symbol-versioning to ncurses because without
-   it,  the  change of ABI would be less successful. A lengthy discussion
-   will  be  presented  in  [25]Symbol versioning in ncurses. These notes
-   summarize what has changed, and what can be done with the new release.
-
-   Symbol-versioning  allows  the  developers  of  a library to mark each
-   public  symbol  (both  data and functions) with an identifier denoting
-   the  library  name  and  the  version for which it was built. By doing
-   this, users of the library have a way to help ensure that applications
-   do not accidentally load an incompatible library. In addition, private
-   symbols can be hidden entirely.
-
-   This   release   provides   sample   files   for  the  four  principal
-   configurations  of  ncurses libraries: ncurses, ncursesw, ncursest and
-   ncursestw. Each sample is given in two forms:
-
-   ".map"
-          These list all public symbols, together with version names.
-
-   ".sym"
-          These list all public symbols, without version names.
-
-   The  sample  files  are generated by scripts which take into account a
-   few special cases such as [26]tack to omit many of the ncurses private
-   symbols  (beginning with "_nc_"). Here are counts of globals versus
-   locals:
-
-      Config   Symbols Globals Locals "_nc_"
-     ncurses       976     796    180    332
-     ncursesw     1089     905    184    343
-     ncursest      979     804    175    358
-     ncursestw    1098     914    184    372
-
-   Although only four sample configurations are presented, each is formed
-   by  merging  symbols  from  several  combinations  of configure-script
-   options, taking into account advice from downstream packagers. Because
-   they  are  formed by merging, the sample files may list a symbol which
-   is  not  in  a  given package. That is expected. The samples have been
-   tested  and  are  working  with  systems  (such as Fedora, FreeBSD and
-   Debian)  which  fully  support  this  feature. There are other systems
-   which  do  not  support the feature, and a few (such as Solaris) which
-   provide incomplete support.
-
-   The  version-naming convention used allows these sample files to build
-   distinct libraries for ABI 5 and 6. Version names consist of
-     * configuration   name,  e.g.,  "NCURSESW"  for  the  wide-character
-       libraries
-     * ABI version (if not 5)
-     * library  name  for two special cases which have the same interface
-       across configurations: "TINFO" and "TIC"
-     * release version
-     * patch date (for the release version)
-
-   For  example,  running  nm  -D  on  the libraries in the ncurses6 test
-   package shows these symbol-versions:
-
-0000000000000000 A NCURSES6_TIC_5.0.19991023
-0000000000000000 A NCURSES6_TIC_5.1.20000708
-0000000000000000 A NCURSES6_TIC_5.5.20051010
-0000000000000000 A NCURSES6_TIC_5.7.20081102
-0000000000000000 A NCURSES6_TIC_5.9.20150530
-0000000000000000 A NCURSES6_TINFO_5.0.19991023
-0000000000000000 A NCURSES6_TINFO_5.1.20000708
-0000000000000000 A NCURSES6_TINFO_5.2.20001021
-0000000000000000 A NCURSES6_TINFO_5.3.20021019
-0000000000000000 A NCURSES6_TINFO_5.4.20040208
-0000000000000000 A NCURSES6_TINFO_5.5.20051010
-0000000000000000 A NCURSES6_TINFO_5.6.20061217
-0000000000000000 A NCURSES6_TINFO_5.7.20081102
-0000000000000000 A NCURSES6_TINFO_5.8.20110226
-0000000000000000 A NCURSES6_TINFO_5.9.20150530
-0000000000000000 A NCURSESW6_5.1.20000708
-0000000000000000 A NCURSESW6_5.3.20021019
-0000000000000000 A NCURSESW6_5.4.20040208
-0000000000000000 A NCURSESW6_5.5.20051010
-0000000000000000 A NCURSESW6_5.6.20061217
-0000000000000000 A NCURSESW6_5.7.20081102
-0000000000000000 A NCURSESW6_5.8.20110226
-0000000000000000 A NCURSESW6_5.9.20150530
-
-   As  a special case, this release (which makes the final change for ABI
-   5) is marked with release version 5.9 and patch date 20150530.
-
-  Miscellaneous
-
-   The new release has several improvements for performance and building.
-   For instance:
-     * several  files  in ncurses- and progs-directories were modified to
-       allow  const  data used in internal tables to be put by the linker
-       into the readonly text segment.
-     * various improvements were made to building the Ada95 binding, both
-       in simplifying the generated files as well as improving the way it
-       uses gnatmake
-
-   There are also new features in the libraries:
-     * added [27]use_tioctl function
-     * added  [28]wgetdelay  to  retrieve  _delay  member of WINDOW if it
-       happens to be opaque, e.g., in the pthread configuration.
-     * added [29]A_ITALIC extension.
-     * added  form  library  extension [30]O_DYNAMIC_JUSTIFY option which
-       can  be  used to override the different treatment of justification
-       for static versus dynamic fields .
-     * rewrote  [31]putwin  and  [32]getwin,  making  an extended version
-       which  is  capable of reading screen-dumps between the wide/normal
-       ncurses  configurations.  These are text files, except for a magic
-       code at the beginning:
-
-0       string          \210\210        Screen-dump (ncurses)
-
-     * several changes to mouse support include:
-          + added decoder for xterm SGR 1006 mouse mode.
-          + added experimental support for "%u" format to terminfo.
-          + improved  behavior  of  wheel-mice for xterm protocol: noting
-            that  there  are only button-presses for buttons "4" and "5",
-            so   there  is  no  need  to  wait  to  combine  events  into
-            double-clicks .
-
-   There   are   a   few  new  configure  options  dealing  with  library
-   customization:
-     * add "--enable-ext-putwin" configure option to turn on the extended
-       putwin/getwin.  By default, this is enabled for ABI 6 and disabled
-       with ABI 5.
-     * add  "--enable-string-hacks" option to control whether strlcat and
-       strlcpy  may  be  used. Because ncurses already does the requisite
-       buffer-limit  checks,  this feature is mainly of interest to quiet
-       compiler-warnings on a few systems.
-     * add  configure  option  "--with-tparm-arg"  to  allow  [33]tparm's
-       parameters  to  be  something more likely to be the same size as a
-       pointer, e.g., intptr_t (again, the default is set for ABI 6).
+    New features
+
+   There are several new features:
+     * O_EDGE_INSERT_STAY  tells  the  form  library  to optionally delay
+       cursor movement on a field edge/boundary
+     * O_INPUT_FIELD  extension to form library allows a dynamic field to
+       shrink if the new limit is smaller than the current field size.
+     * added  exit_curses  and  exit_terminfo to replace internal symbols
+       for leak-checking.
+     * added curses_trace, to replace trace().
+
+   Additionally,  to  improve  performance other changes (and extensions)
+   are provided in this release:
+     * mouse  decoding  now handles shift/control/alt logic when decoding
+       xterm's 1006 mode
+     * ncurses  now  defines a limit for wgetnstr, wgetn_wstr when length
+       is negative or "too large".
+     * reordered  loop-limit checks in winsnstr in case the string has no
+       terminating null and only the number of characters is used.
+     * there  is  now  no  buffer-size  limit  when  reading the $TERMCAP
+       variable.
+     * the  $TERMCAP  variable  may  be  interpreted  as  a fallback to a
+       terminfo entry
+     * mvcur  now decides whether to use hard-tabs, using xt, tbc and hts
+       as clues.
+     * extended  colors  are  improved  by  modifying an internal call to
+       vid_puts  to pass extended color pairs e.g., from tty_update.c and
+       lib_mvcur.c
+     * the  initialization  functions  now  avoid relying upon persistent
+       data for the result from getenv
+     * scrolling is improved:
+          + a limit check in newline_forces_scroll handles the case where
+            the row is inside scroll-margins, but not at the end.
+          + improved loop limits in _nc_scroll_window handle a case where
+            the scrolled data is a pad which is taller than the window.
+
+    Other improvements
+
+   These are revised features:
+     * used  "const"  in  some prototypes rather than NCURSES_CONST where
+       X/Open  Curses  was updated to do this, e.g., wscanw, newterm, the
+       terminfo  interface.  Also  use  "const"  for  consistency  in the
+       termcap interface, which was withdrawn by X/Open Curses in Issue 5
+       (2007).  As  of  Issue  7,  X/Open  Curses still lacks "const" for
+       certain return values, e.g., keyname.
+     * modified  wbkgd  and  wbkgrnd  to  improve compatibility with SVr4
+       curses,  changing the way the window rendition is updated when the
+       background character is modified
+     * improved  terminfo  write/read by modifying the fourth item of the
+       extended  header  to  denote  the  number  of valid strings in the
+       extended string table (see term(5)).
+     * modified   the   initialization  checks  for  mouse  so  that  the
+       xterm+sm+1006  block  will  work  with  terminal  descriptions not
+       mentioning xterm.
+
+   These were done to limit or ultimately deprecate features:
+     * deprecated  safe-sprintf, since the vsnprintf function, which does
+       what was needed, was standardized long ago.
+     * marked   vwprintw  and  vwscanw  as  deprecated;  recommend  using
+       vw_printw and vw_scanw, respectively.
+     * added  deprecation warnings for internal functions called by older
+       versions of tack.
+     * removed unused _nc_import_termtype2 function.
+
+   These are improvements to existing features:
+     * check parameter of set_escdelay, return ERR if negative.
+     * check  parameter  of  set_tabsize,  return ERR if not greater than
+       zero
+     * correct  a status-check in _nc_read_tic_entry() so that if reading
+       a hex/b64 $TERMINFO, and the $TERM does not match, fall-through to
+       the compiled-in search list.
+     * amend check for repeat_char to handle a case where setlocale() was
+       called after initscr
+     * move macro for is_linetouched inside NCURSES_NOMACROS ifndef.
+     * use _nc_copy_termtype2 rather than direct assignment in setupterm,
+       in   case   it   is  called  repeatedly  using  fallback  terminfo
+       descriptions
+     * improve   workaround   for  Solaris  wcwidth  versus  line-drawing
+       characters
+     * add  checks  in repair_subwindows to keep the current position and
+       scroll-margins inside the resized subwindow.
+     * correct  a  buffer-limit  in  write_entry.c  for  systems that use
+       caseless filenames.
+     * improved build-time utility report_offsets:
+          + add categories, e.g., "w" for wide-character, "t" for threads
+            to  make the report more readable. Reorganized the structures
+            reported to make the categories more apparent.
+          + add  NCURSES_GLOBALS  and NCURSES_PRESCREEN to report to show
+            how similar the different libtinfo configurations are.
+     * modified  some header files to ensure that those include necessary
+       files except for the previously-documented cases
+     * added  some  traces  in  initialization to show whether a fallback
+       entry is used.
+     * made minor optimization to reduce calls to _nc_reserve_pairs
+
+   These are corrections to existing features:
+     * fix  a  special  case  in  PutAttrChar  where  a cell is marked as
+       alternate-character  set,  but  the  terminal  does  not  actually
+       support the given graphic character. This would happen in an older
+       terminal such as vt52, which lacks most line-drawing capability.
+     * corrected  flag  for "seq" method of db 1.8.5 interface, needed by
+       toe on some of the BSDs.
+     * modify  comparison  in  make_hash.c  to  correct a special case in
+       collision handling for Caps-hpux11
+     * add    extended_slk_color{,_sp}   symbols   to   the   appropriate
+       package/*.{map,sym} files
+     * modify  lib_setup  to  avoid  calling pthread_self() without first
+       verifying that the address is valid, i.e., for weak symbols
+     * add  a  couple  of  broken-linker symbols to the list of versioned
+       symbols to help with link-time optimization versus weak symbols.

 
   Program improvements
 
 
   Program improvements
 

-    Utilities
-
-   Most of the termcap-related changes based on development of [34]tctest
-   (termcap  library  checker)  are  implemented  in  the tic and infocmp
-   programs   rather   than  affecting  the  library.  As  noted  in  the
-   [35]discussion  of  tctest,  ncurses's  ability  to  translate between
-   terminfo and termcap formats has been improved at different times, but
-   subject  to  feedback from "real" termcap users. There are very few of
-   those.  Nowadays,  virtually  all  termcap users are using ncurses (or
-   NetBSD, with its own terminfo library) and their programs are actually
-   using terminfo rather than termcap data.
-
-   Still,  there  are a few. A comment about the translation of the ASCII
-   NUL character prompted a review:
-     * Both   terminfo   and   termcap   store   string  capabilities  as
-       NUL-terminated strings.
-     * In terminfo, a \0 in a terminal description is stored as \200.
-     * There are no (known) terminals which would behave differently when
-       sent \0 or \200.
-     * When  translating  to  terminfo  format (or displaying a printable
-       version of an entry using infocmp), ncurses shows \200 as \0.
-     * It has done this since 1998 (quoting from the NEWS file):
-
-[36]980103
-...
-        + modify _nc_tic_expand() to generate \0 rather than \200.
-...
-        + correct translation of terminfo "^@", to \200, like \0.
-
-     * However,  the  _nc_tic_expand  function (which optionally produces
-       terminfo  or termcap format) did not address this special case for
-       termcap.  Even  the  later  4.4BSD  [37]cgetstr  interprets  a  \0
-       literally,  ending  that  string  (rather  than using the terminfo
-       improvement).
-
-   As  a  result of the review, several improvements were made to ncurses
-   translation to/from termcap format -- and improving the checks made in
-   tic  for  consistency  of  entries.  Most  of these are not of general
-   interest, except for two new command-line options for tic and infocmp:
-     * the  "-0"  option  generates  termcap/terminfo  source on a single
-       line.
-     * the  "-K"  option  provides stricter BSD-compatibility for termcap
-       output.
-
-   Other user-visible improvements and new features include:
-     * added  "-D"  option  to  tic  and  infocmp,  to  show the database
-       locations that it could use.
-     * added "-s" option to toe, to sort its output.
-     * extended  "-c" and "-n" options of infocmp to allow comparing more
-       than two entries.
-     * modified  toe's report when "-a" and "-s" options are combined, to
-       add a column showing which entries belong to a given database.
-     * modified  the clear program to take into account the "E3" extended
-       capability to clear the terminal's scrollback buffer.
+   Several improvements were made to the utility programs:
+
+   clear
+
+          + improved  logic  for  clearing with the E3 extension, in case
+            the  terminal  scrolls  content  onto  its saved-lines before
+            actually  clearing  the  display, by clearing the saved-lines
+            after clearing the display
+
+   infocmp
+
+          + omit  filtering  of  "OTxx" names which are used for obsolete
+            capabilities,  when  the output is sorted by long-names. This
+            change helps when making a table of the short/long capability
+            names.
+
+   tic
+
+          + added   check   for   consistent   alternate   character  set
+            capabilities.
+          + added check for paired indn/rin.
+          + added check for terminals with parm_dch vs parm_ich.
+          + added  check  for  the  case  where setf/setb are given using
+            different   strings,   but   provide   identical  results  to
+            setaf/setab.
+          + corrected check for ich1.
+          + changed  a  too-large  terminal entry from a fatal error to a
+            warning.
+
+   toe
+
+          + ignores  any  hex/b64 $TERMINFO value in the list of terminfo
+            databases.
+
+   tset
+
+          + replace  check  in reset command for obsolete "pt" capability
+            using tbc and hts capabilities as clues
+          + modify reset to allow for tabstops at intervals other than 8.
+          + change   reset's   behavior   for  margins  to  simply  clear
+            soft-margins  if  possible,  rather  than  clearing  and then
+            setting them according to the terminal's width.
+
+   tput
+
+          + add "x" to getopt string so that "tput -x clear" works.
+
+   Several  changes were made to the generated ncurses*config scripts and
+   the   analogous   ".pc"   files  to  reduce  differences  between  the
+   configurations they report:
+     * modified the ncurse*-config and pc-files to more closely match for
+       the -I and -l options.
+     * filtered out linker-specs from the --libs report.
+     * amended  the ncurses*-config and pc-files to take into account the
+       rpath hack which differed between those files.
+     * modified  generated  ncurses*config  and  ncurses.pc, ncursesw.pc,
+       etc., to list helper libraries such as gpm for static linking.

 
     Examples
 
 
     Examples
 

-   Along  with  the library and utilities, many improvements were made to
-   the  [38]ncurses-examples.  Some  were  made  to  allow  building (and
-   comparison-testing) against NetBSD curses and PDCurses. Both lack some
-   of  the  X/Open Curses features, necessitating customization. But this
-   activity  was  useful  because  it  showed  some remaining performance
-   issues (which have been resolved in this release).
-
-   These changes were made to verify compatibility or compare performance
-   of ncurses:
-     * made  workarounds  for compiling test-programs with NetBSD curses,
-       though it lacks some common functions such as [39]use_env.
-     * added dots_termcap test-program
-     * added  dots_curses test-program, for comparison with the low-level
-       examples.
-     * added   test_setupterm  test-proram  to  demonstrate  normal/error
-       returns from the setupterm and restartterm functions.
-     * added  "-d",  "-e"  and  "-q"  options  to  the  demo_terminfo and
-       demo_termcap test-programs.
-     * added   "-y"   option   to   demo_termcap  and  test/demo_terminfo
-       test-programs   to   demonstrate  behavior  with/without  extended
-       capabilities.
-     * modified  demo_termcap  and  demo_terminfo  test-programs  to make
-       their  options  more  directly  comparable, and add "-i" option to
-       specify  a  terminal  description  filename  to parse for names to
-       lookup.
-     * rewrote   the  tests  for  [40]mvderwin  and  test  for  recursive
-       [41]mvwin in the movewindow test-program.
-
-   These changes were made to help with the MinGW port:
-     * added   test-screens   to   the   ncurses   test-program  to  show
-       256-characters at a time, to help with MinGW port.
-     * modified the view test-program to load UTF-8 when built with MinGW
-       by  using  regular win32 API because the MinGW functions mblen and
-       mbtowc do not work.
-     * added "-s" option to the view test-program to allow it to start in
-       single-step mode, reducing size of trace files when it is used for
-       debugging MinGW changes.
-
-   These changes were made to verify new extensions in ncurses:
-     * added   [42]form_driver_w   entrypoint   to  wide-character  forms
-       library, as well as form_driver_w test-program.
-     * modified  ncurses  test-program's  b/B tests to display lines only
-       for  the  attributes which a given terminal supports, to make room
-       for an italics test.
-     * modified  ncurses  test-program,  adding  "-E" and "-T" options to
-       demonstrate use_env versus use_tioctl.
-     * modified ncurses test-program's c/C tests to cycle through subsets
-       of   the   total   number   of   colors,   to   better  illustrate
-       8/16/88/256-colors by providing directly comparable screens.
-     * modified the ncurses test-program to also show position reports in
-       'a' test.
-
-   These changes were made to make the examples more useful:
-     * added scripts for building dpkg and rpm test-packages
-     * modified  the  hanoi  test-program  to  show the minimum number of
-       moves possible for the given number of tiles.
-     * modified  the  knight  test-program  to show the number of choices
-       possible for each position in automove option, e.g., to allow user
-       to follow Warnsdorff's rule to solve the puzzle.
+   Along  with  the  library and utilities, improvements were made to the
+   ncurses-examples.  Most  of  this  activity  aimed  at  improving  the
+   test-packages.  A few changes are more generally useful, e.g., for the
+   main   ncurses  test-program,  and  for  analyzing  traces  using  the
+   tracemunch script:
+     * improve  recovery  from  error  when  reading command-character in
+       test/ncurses.c, showing the relevant error message and not exiting
+       on EINTR.
+     * improve  tracemunch,  by keeping track of TERMINAL* values, and if
+       tracing  was first turned on after initialization, attempt to show
+       distinct screen, window and terminal names anyway.
+     * modify tracemunch to accept filename parameters in addition to use
+       as a pipe/filter.
+     * update  tracemunch  to  work  with  perl 5.26.2, which changed the
+       rules for escaping regular expressions.
+     * add some checks in tracemunch for undefined variables.
+     * modify TurnOn/TurnOff macros (in lib_vidattr.c and lib_vid_attr.c)
+       to avoid expansion of "CUR" in trace.
+
+   There are other new demo/test programs and reusable examples:
+
+   color_content
+          Demonstrate   the   color_content   and  extended_color_content
+          functions.
+
+   demo_tabs
+          A simple demo of tabs in curses.
+
+   dump_window
+          A  portable  curses screen-dump, used to compare ncurses screen
+          contents with Solaris.
+
+   pair_content
+          Demonstrate    the   pair_content   and   extended_pair_content
+          functions.
+
+   report_hashing
+          Check hash-tables used for terminfo and termcap names.
+
+   parse_rgb
+          Sample   implementation  of  the  ncurses  RGB  extension  from
+          user_caps.5, used in picsmap and savescreen programs.
+
+   A  variety  of  improvements  were made to existing programs, both new
+   features  as  well  as  options added to make the set of programs more
+   consistent.
+     * add  "-l"  option to test/background, to dump screen contents in a
+       form that lets different curses implementations be compared.
+     * add  "@"  command  to  test/ncurses F-test, to allow rapid jump to
+       different character pages.
+     * added enum, regex examples to test/demo_forms
+     * amend  Scaled256() macro in test/picsmap.c to cover the full range
+       0..1000
+     * corrected  pathname used in Ada95 sample programs for explain.txt,
+       to  work  with  test-packages, and used an awk script to split the
+       resulting pathname when it would be too long for a single line.
+     * ignore  interrupted  system-call  in  test/ncurses's command-line,
+       e.g., if the terminal were resized.
+     * improved  ifdef's  for  TABSIZE  variable,  to  help with AIX/HPUX
+       ports.

 
   Terminal database
 
 
   Terminal database
 

-   This  release  provides  improvements  to  tic's "-c" checking option,
-   which was used for example to
-     * make sgr in several entries agree with other caps.
-     * correct  padding  in  some  entries  where  earlier  versions  had
-       miscounted the number of octal digits.
-

    There are several new terminal descriptions:
    There are several new terminal descriptions:

-     * [43]mlterm is now aliased to mlterm3
-     * [44]nsterm is now derived from nsterm-256color
-     * [45]putty-sco
-     * [46]teken is FreeBSD's "xterm" console.
-     * [47]terminator
-     * [48]terminology
-     * [49]tmux is derived from screen.
-     * several  screen.XXX  entries support the respective variations for
-       256 colors.
-     * [50]simpleterm is now 0.5
-     * [51]vte is aliased to vte-2012
-     * [52]vt520ansi
+
+     alacritty,  domterm,  kitty,  mintty,  mintty-direct,  ms-terminal,
+     n7900,   nsterm-build309,  nsterm-direct,  screen5,  ti703,  ti707,
+     ti703-w, ti707-w vscode, vscode-direct, xterm-mono, xterm.js
+
+   There  are  many  changes to existing terminal descriptions. Some were
+   updates to several descriptions:
+     * use ansi+rep in a dozen places
+     * add rs1 to konsole, mlterm
+     * improve several flash capabilities with trailing mandatory delays
+     * drop   ich1   from   rxvt-basic,   Eterm  and  mlterm  to  improve
+       compatibility with old non-curses programs
+     * add/use xterm+keypad in xterm-new
+     * use xterm+sl-twm for consistency, nine places
+     * improve xm example in xterm+x11mouse and xterm+sm_1006.
+
+   while  others  affected specific descriptions. These were retested, to
+   take into account changes by their developers:
+
+     terminator, st
+
+   while  these are specific fixes based on reviewing documentation, user
+   reports, or warnings from tic:
+
+   adds200:
+
+          + fix typo
+
+   gnome-256color
+
+          + base entry on "gnome", not "vte", for consistency
+
+   interix
+
+          + trim unnecessary setf/setb
+
+   linux-16color
+
+          + accommodate  Linux  console driver incompatibility introduced
+            in early 2018
+
+   nsterm-256color:
+
+          + add nsterm-build309 to replace nsterm-256color, assigning the
+            latter  as  an  alias  of  nsterm,  to  make  mouse work with
+            nsterm-256color
+
+   regent40:
+
+          + renumber function-keys to match manual
+
+   regent60:
+
+          + add cd (clr_eos)
+          + corrected acsc
+          + add shifted function-keys
+
+   tvi950:
+
+          + added  function-key  definitions  to agree with Televideo 950
+            manual
+          + corrected acsc
+          + remove bogus kf0
+          + add bel
+
+   tvi955:
+
+          + fix typo
+
+   vi200:
+
+          + add acsc string, including right/down-arrow
+
+   wy50:
+
+          + corrected acsc
+
+   wy50 and wy60:
+
+          + add shifted function-keys as kF1 to kF16
+
+   xterm+x11hilite:
+
+          + eliminate unused p5 parameter.

 
    A few entries use extensions (user-defined terminal capabilities):
 
    A few entries use extensions (user-defined terminal capabilities):

-     * E3,  used  in  linux,  putty  and  xterm-basic  is  tested  in the
-       [53]clear program to erase a terminal's scrollback.
-     * TS  is  used  in the [54]xterm+sl building block to help deprecate
-       the misuse of tsl for xterm's title-string.
-     * XT  is  used  in  some  terminfo entries to improve usefulness for
-       other  applications  than screen, which would like to pretend that
-       xterm's title is a status-line.
-     * xm  is  used  in  examples  [55]xterm-1005  and  [56]xterm-1006 to
-       illustrate a way to make mouse handling more general
-
-   A   few   terminals   support  italics  and/or  dim  capabilities.  In
-   particular,  screen  does  not.  Documented that, and accommodated the
-   terminals where this feature works with the A_ITALIC extension.
-     * konsole, mlterm3 (italics)
-     * nsterm (dim)
-     * screen (dim)
-     * vte (dim, italics)
-     * xterm (dim, italics)
+     * use  xterm+sm+1006  (aka  "SGR  1006  mouse") for konsole-base and
+       putty
+     * add Smol/Rmol user-defined capability to tmux and vte-2018
+     * add Smulx user-defined capability to tmux, vte-2018

 
   Documentation
 
 
   Documentation
 


@@ -468,325 +402,279 @@ fflush(stdout);
      * attempts  to  improve the description of features which users have
        found confusing
      * fills  in overlooked descriptions of features which were described
      * attempts  to  improve the description of features which users have
        found confusing
      * fills  in overlooked descriptions of features which were described

-       in the [57]NEWS file but treated sketchily in manual pages.
-
-   In  addition,  the  mechanism  for  producing  HTML  versions  of  the
-   documentation has been improved:
-     * use an improved version of [58]man2html to generate html manpages.
-     * regenerated  [59]NCURSES-Programming-HOWTO.html to fix some of the
-       broken html emitted by docbook.
+       in the NEWS file but treated sketchily in manual pages.
+
+   In  addition  to  providing  background  information  to explain these
+   features   and   show   how   they  evolved,  there  are  corrections,
+   clarifications, etc.:
+     * Corrections:
+          + correct  error-returns  listed in manual pages for a few form
+            functions
+          + corrected  prototypes  in  several  manpages  using script to
+            extract those in compilable form.
+          + fix typo in term.5, improve explanation of format
+     * Clarify in manual pages that vwprintw and vwscanw are obsolete.
+       They have not been part of X/Open Curses since 2007.
+     * New/improved history and portability sections:
+          + curs_addch.3x gives some background for ACS symbols.
+          + curs_getcchar.3x  explains  a  difference between ncurses and
+            X/Open Curses.
+          + curs_getstr.3x  gives  historical/portability  background for
+            the length parameter of wgetnstr.
+          + curs_slk.3x  lists  a few differences between SVr4 curses and
+            X/Open Curses for soft-keys.
+          + curs_terminfo.3x  explains that the initial implementation of
+            terminfo  in  SVr2 was mostly replaced by other developers in
+            SVr3.
+          + infocmp.1  explains  that the initial version of terminfo had
+            no  tool  for decompiling descriptions. That came later, with
+            SVr3, with a different developer.
+          + tabs.1 tells more than you wanted to know about the tool.
+          + tic.1  explains  that  the  initial version of terminfo had a
+            rudimentary  tool  (based  on termcap) for compiling entries.
+            The tool used with Unix was developed by others for SVr3.
+          + toe.1 explains the origin of this tool.
+     * Improvements for user_caps.5:
+          + mention meml, memu and box1
+          + expanded description of XM
+          + add a clarification regarding the RGB capability.
+          + mention user_caps.5 in the tic and infocmp manual pages.
+     * Other improvements:
+          + curs_add_wch.3x  adds  note about Unicode terminology for the
+            line-drawing characters.
+          + curs_color.3x   improves  discussion  of  error  returns  and
+            extensions.
+          + curs_mouse.3x  explains how the kmous and XM capabilities are
+            used for xterm-mouse input.
+          + curs_refresh.3x  improves documentation regarding the virtual
+            and physical screens.
+          + curs_util.3x  mentions  a  difference between SVr4 and X/Open
+            Curses for unctrl.h
+          + curs_variables.3x   improves  description  of  the  init_tabs
+            capability and TABSIZE variable.
+          + ncurses.3x   improves  documentation  regarding  feature-test
+            macros in curses.h
+          + resizeterm.3x   about   top-level  windows  which  touch  the
+            screen's borders.
+          + tput.1 clarifies how tput determines the terminal size.
+
+   There  are  no new manual pages (all of the manual page updates are to
+   existing pages).
+
+   Some  of  the  improvements  are  more subtle, relating to the way the
+   information  is presented. For instance, the generated terminfo.5 file
+   uses  a  different  table  layout,  allowing  it  to use space on wide
+   terminals more effectively.

 
   Interesting bug-fixes
 
 
   Interesting bug-fixes
 

-     * Ada95 binding:
-          + modify  makefile  rules  to ensure that the PIC option is not
-            used when building a static library
-          + make  Ada95  build-fix  for  big-endian architectures such as
-            sparc.  This undoes one of the fixes from [60]20110319, which
-            added an "Unused" member to representation clauses, replacing
-            that with pragmas to suppress warnings about unused bits.
-     * Color and attributes:
-          + parenthesize  parameter  of  COLOR_PAIR  and  PAIR_NUMBER  in
-            curses.h in case it happens to be a comma-expression.
-          + improve  [61]20021221  workaround  for broken acs, handling a
-            case  where  that ACS_xxx character is not in the acsc string
-            but there is a known wide-character which can be used.
-          + modify  [62]init_pair  to  accept  -1's for color value after
-            [63]assume_default_colors has been called.
-          + add  a  check  in [64]start_color to limit color-pairs to 256
-            when extended colors are not supported.
-     * Resizing the screen:
-          + propagate  error-returns  from  wresize,  i.e.,  the internal
-            increase_size    and    decrease_size    functions    through
-            [65]resize_term.
-          + add  check  for  zero/negative  dimensions for resizeterm and
-            resize_term.
-          + modify  resizeterm to always push a KEY_RESIZE onto the fifo,
-            even  if  screensize  is  unchanged. Modify library to push a
-            KEY_RESIZE  if there was a SIGWINCH, even if it does not call
-            resizeterm).   These  changes  eliminate  the  case  where  a
-            SIGWINCH  is  received,  but  ERR  is returned from wgetch or
-            wgetnstr because the screen dimensions did not change.
-     * Low-level interfaces
-          + fix  an old bug in the termcap emulation; "%i" was ignored in
-            tparm  because  the parameters to be incremented were already
-            on the internal stack.
-          + change  "%l" behavior in tparm to push the string length onto
-            the  stack  rather  than saving the formatted length into the
-            output buffer.
-          + modify  name-comparison  for  tgetstr,  etc.,  to accommodate
-            legacy  applications  as well as to improve compatbility with
-            BSD 4.2 termcap implementations (see note for [66]980725).
-     * High-level interfaces
-          + modify internal recursion in wgetch which handles cooked mode
-            to  check if the call to wgetnstr returned an error. This can
-            happen  when  both nocbreak and nodelay are set, for instance
-            (see note for [67]960418).
-          + add a check in internal function waddch_nosync to ensure that
-            tab characters are treated as control characters; some broken
-            locales claim they are printable.
-          + modify  menu  library  to  ensure  that  a  menu's top-row is
-            adjusted  as needed to ensure that the current item is on the
-            screen
-          + fix  special  case  where double-width character overwrites a
-            single- width character in the first column.
+   While  there  were  many bugs fixed during development of ncurses 6.2,
+   only  a  few  (the  reason  for  this release) were both important and
+   interesting. Most of the bug-fixes were for local issues which did not
+   affect  compatibility across releases. Since those are detailed in the
+   NEWS file no elaboration is needed here.
+
+   The  interesting  bugs  were in tic/infocmp's handling of user-defined
+   capabilities.  These  were  not recent bugs. Initially it was a simple
+   problem:
+     * The  user-defined capabilities can be any type (boolean, number or
+       string),  but  once given a type all uses of the name must conform
+       to  that  type--unless  some  special  support  for  a  particular
+       multi-typed name is built into ncurses.
+     * One of simpleterm's contributors copied some definitions for using
+       tmux's user-defined capabilities in late in 2016.
+
+diff --git a/st.info b/st.info
+@@ -185,7 +185,10 @@ st| simpleterm,
+  tsl=\E]0;,
+  xenl,
+  vpa=\E[%i%p1%dd,
+-
++# Tmux unofficial extensions, see TERMINFO EXTENSIONS in tmux(1)
++ Se,
++ Ss,
++ Tc,
+
+ st-256color| simpleterm with 256 colors,
+  use=st,
+
+     * Later,  in (referring to a version from mid-2017), a user asked to
+       have it updated in ncurses.
+     * However,  it  had  an  error  from  the  change  in late 2016. The
+       terminal description made what tmux expected to be string actually
+       a boolean.
+       Over  the  years,  there  were  problems with each of simpleterm's
+       terminal  descriptions.  I  repaired those, and usually dealt with
+       the problem.
+     * The  difference  in this case was that when compiling the terminal
+       database, tic may have in memory the definitions for more than one
+       terminal  description  (so  that  it  can resolve "use=" clauses).
+       Seeing   two  different  types  for  the  same  name,  in  certain
+       situations  it  would  incorrectly merge the symbol tables for the
+       two terminal descriptions.
+     * On  simpleterm's  side,  their bug was finally fixed in late 2019,
+       three years after the bug was created.
+
+   For  ncurses,  the  elapsed  time  to fix this bug was less than three
+   years.  Someone reported a problem with the terminal description a few
+   weeks  after  releasing  ncurses 6.1 (in tmux #1264), and the terminal
+   description was updated that week (ncurses patch 20180224):
+
+20180224
+        + modify _nc_resolve_uses2() to detect incompatible types when merging
+          a "use=" clause of extended capabilities.  The problem was seen in a
+          defective terminfo integrated from simpleterm sources in 20171111,
+          compounded by repair in 20180121.
+        + correct Ss/Ms interchange in st-0.7 entry (tmux #1264) -TD
+
+   The larger part of that change added a check to prevent a simple merge
+   of  terminal  descriptions  where  the same user-defined name was used
+   with different types. But it raised some questions:
+     * Was  there  a  reliable  way to manage terminal descriptions which
+       used the same extended name in different ways?
+     * Should  ncurses  provide  a registry of well-known extended names,
+       with their types?
+
+   Since  the  correction to terminfo.src could have been readily adopted
+   by  packagers,  there  was  nothing  more  to  be  done  from ncurses'
+   standpoint  on that part. But improving ncurses to prevent issues like
+   that is the reason for making a release.
+
+   Nothing  more  (constructive) was mentioned with regard to simpleterm.
+   But  a  few  problems  were  found  in  the  handling  of user-defined
+   capabilities:
+     * Forward-references to user-defined capabilities in a "use=" clause
+       did  not  allocate  new  data  for  each  use.  In tic, successive
+       compilation   of   terminal   entries   could   add   user-defined
+       capabilities to the wrong terminal entry.
+       This  was  not noticed before, since xterm's terminal descriptions
+       were  the main users of the feature, and almost all of the uses of
+       the building-blocks which contained user-defined capabilities were
+       backward-references.
+     * There  is  one  (documented)  case  where  ncurses  6.1 supports a
+       user-defined  capability that could be any type (i.e., "RGB"). The
+       check  added  in February 2018 to guard against mismatches did not
+       handle all of the combinations needed.
+
+   Both  of  these  issues  dated  from  the  original  implementation of
+   user-defined  capabilities.  Fixing  them does not change the terminal
+   database, but a older tic without the fixes will not be able to handle
+   terminfo  sources  which rely upon those fixes. Starting in June 2019,
+   the  download  link  for  the  terminfo source file was capped at that
+   date. The development sources have an up-to-date copy of the file, for
+   people with a legitimate need for it.
+
+   The  "-c"  (check) option of tic is not very useful if it cannot offer
+   advice on parameters needed for user-defined capabilities. The various
+   Caps  files  were  reorganized to reduce redundancy, and in the common
+   portion  (Caps-ncurses),  a  registry  of user-defined capabilities is
+   provided for use by tic. While users can still define their own custom
+   capabilities,  tic  will not offer any advice when their parameters do
+   not match.
+
+   In  ncurses  6.2, tic makes a special check to allow any type for RGB,
+   but  its  being  able to do this relies upon fixes made in the ncurses
+   library in mid-2019.

 
   Configuration changes
 
     Major changes
 
 
   Configuration changes
 
     Major changes
 

-   The ncurses 6.0 configure script makes changes to the default value of
-   several  configure options, depending on the --with-abi-version option
-   (i.e., whether its value is "5" or "6"):
-
-   --enable-const
-          Feature  introduced  in  [68]970405  supports  the use of const
-          where  X/Open  Curses  should  have, but did not. NetBSD curses
-          does something similar with const.
-
-   --enable-ext-colors
-          Extends  the  cchar_t structure to allow more than 16 colors to
-          be   encoded.   This   applies   only   to  the  wide-character
-          (--enable-widec) configuration.
-
-   --enable-ext-mouse
-          Modifies  the  encoding  of  mouse state to make room for a 5th
-          mouse button. That allows one to use ncurses with a wheel mouse
-          with xterm or similar X terminal emulators.
-
-   --enable-ext-putwin
-          Modifies  the  file-format  written  by putwin to use printable
-          text  rather  than binary files, allowing getwin to read screen
-          dumps  written by differently-configured ncurses libraries. The
-          extended  getwin  can  still  read binary screen dumps from the
-          same  configuration  of  ncurses.  This does not change the ABI
-          (the binary interface seen by calling applications).
-
-   --enable-interop
-          Modifies  the  FIELDTYPE structure used for the form library to
-          make it more generic.
-
-   --enable-lp64
-          Allows  an  application  to  define _LP64 to declare chtype and
-          mmask_t  as  simply "unsigned" rather than the configured types
-          using the --with-chtype and --with-mmask_t options.
-
-   --enable-sp-funcs
-          Compile-in support for extended functions which accept a SCREEN
-          pointer,  reducing  the  need  for juggling the global SP value
-          with [69]set_term and [70]delscreen.
-
-   --with-chtype=uint32_t
-          Makes chtype explicitly a 32-bit unsigned value.
-
-   --with-mmask_t=uint32_t
-          Makes mmask_t explicitly a 32-bit unsigned value.
-
-   --with-tparm-arg=intptr_t
-          X/Open  Curses  declares  [71]tparm  using long for each of the
-          parameters  aside  from  the  formatting string, presuming that
-          long  and  char*  are the same size. This configure option uses
-          intptr_t which provides a better guarantee of the sizes.
-
-   The  configure  script  no longer checks for antique compilers; c89 is
-   assumed  as  a  minimum. There are a few features from later revisions
-   which  are  used  when available. The configure script makes checks to
-   turn on useful warnings from clang, gcc and icc. You should be able to
-   build  ncurses  6.0  with  any  of  the  current (or not so current) C
-   compilers available in 2015.
-
-   The configure script, by the way, makes changes which do not work with
-   systems  whose  /bin/sh is non-POSIX. This mainly affects Solaris (the
-   other  vendor  unix systems have followed the POSIX guidelines for the
-   past  twenty  years).  If  you  must  build  on  Solaris, its [72]xpg4
-   binaries suffice, e.g.,
-
-     #!/bin/sh
-     WHAT=`hostname|sed -e 's/\..*//'`
-     OUT=configure.out
-     cat >>$OUT <<EOF/
-     ** `date`
-     ** node: $WHAT
-     ** user: `id`
-     ** conf: $*
-     EOF/
-
-     SHELL=/bin/sh
-     if test -f /usr/xpg4/bin/sh
-     then
-             CONFIG_SHELL=/usr/xpg4/bin/sh
-             export CONFIG_SHELL
-             SHELL=$CONFIG_SHELL
-     fi
-
-     rm -f config.status config.cache
-     TOP=$HOME/$WHAT
-     $SHELL ./configure --verbose \
-             --disable-echo \
-             --disable-overwrite \
-             --enable-warnings \
-             --with-warnings \
-             --prefix=$TOP $* 2>&1 | tee -a $OUT
-
-   Other major changes to the configure script include:
-     * ABI 6 is now the default, intending that the existing ABI 5 should
-       build as before using the "--with-abi-version=5" option.
-     * added   --with-extra-suffix   option   to   help  with  installing
-       nonconflicting  ncurses6  packages,  e.g.,  avoiding  header-  and
-       library-conflicts.
-       NOTE: as a side-effect, this renames
-
-     adacurses-config to adacurses5-config and
-     adacursesw-config to adacursesw5-config
-     * the  configure  script  looks  for gnatgcc if the Ada95 binding is
-       built,  in  preference  to  the  default  gcc/cc.  The script also
-       ensures  that  the  Ada95  binding  is  built  with  the  level of
-       optimization as the C libraries.
-     * the  configure script captures define's related to -D_XOPEN_SOURCE
-       from  the  configure check and adds those to the *-config and *.pc
-       files, to simplify use for the wide-character libraries.
+   There  are  no  major  changes. Several new options were added to ease
+   integration  of packages with systems using different versions of GNAT
+   and ncurses. Also, improvements were made to configure checks.

 
     Configuration options
 
 
     Configuration options
 

-   There are several new (or extended) configure options:
+   There are a few new/modified configure options:

 
 

-   --disable-db-install
-          Do  not  install  the  terminal  database. This is used to omit
-          features for packages, as done with --without-progs. The option
-          simplifies building cross-compile support packages.
+   --with-config-suffix
+          helps  work  around  a  filename  conflict with Debian packages
+          versus test-packages.

 
 

-   --disable-gnat-projects
-          This option is used for regression testing
+   --with-ada-libname
+          allows  one  to  rename  the  "AdaCurses" library (at least one
+          packager prefers a lowercase name).

 
 

-   --disable-lib-suffixes
-          Suppress  the "w", "t" or "tw" suffixes which normally would be
-          added   to   the  library  names  for  the  --enable-widec  and
-          --with-pthread options.
+   --with-fallbacks
+          now ensures there is a value, and adds the fallback information
+          to top-level Makefile summary.

 
 

-   --with-cxx-shared
-          When  --with-shared  is  set,  build  libncurses++  as a shared
-          library.  This  implicitly  relies  upon building with gcc/g++,
-          since  other  compiler  suites  may have differences in the way
-          shared  libraries  are  built.  libtool  by the way has similar
-          limitations.
+   --with-pcre2
+          check for pcre-posix library to help with MinGW port.

 
 

-   --with-hashed-db
-          Extended  this  configure  option  to  simplify  building  with
-          different versions of Berkeley database using FreeBSD ports.
+   --with-tic-path and

 
 

-   --with-pc-suffix
-          If  ".pc"  files  are installed, optionally add a suffix to the
-          files  and  corresponding  package  names  to  separate unusual
-          configurations.  If  no  option  value  is  given  (or if it is
-          "none"),  no  suffix  is added. This option is used in the test
-          package for ncurses6.
+   --with-infocmp-path
+          help  work  around  problems  building  fallback  source  using
+          pre-6.0 tic/infocmp.

 
 

-   --with-xterm-kbs
-          Configure  xterm's terminfo entries to use either BS (^H, i.e.,
-          ASCII backspace) or DEL (^?, or 127).
+   --with-versioned-syms
+          option value can now be a relative pathname.

 
   Portability
 
 
   Portability
 

-    MinGW
-
-   Most  of  the  portability-related work since [73]ncurses 5.9 extended
-   and improved the MinGW port introduced in [74]ncurses 5.8.
-
-   The MinGW port can be readily cross-compiled:
-     * modified  configure  script to allow creating dll's for MinGW when
-       cross-compiling.
-     * enforced Windows-style path-separator if cross-compiling,
-     * added  scripts  for  test-builds  of  cross-compiled  packages for
-       ncurses6 to MinGW.
-     * added pc-files to the MinGW cross-compiling test-packages.
-     * added script for building test-packages of binaries cross-compiled
-       to MinGW using NSIS.
-     * added  nc_mingw.h  to  installed  headers  for MinGW port; this is
-       needed for cross-compiling [75]ncurses-examples.
-     * added test-packages for cross-compiling ncurses-examples using the
-       MinGW test-packages.
-
-   The MinGW-specific Windows driver accounts for several changes:
-     * wide-character   display  is  made  usable  by  replacing  MinGW's
-       non-working wcrtomb and wctomb functions.
-     * implemented    some   display   features:   [76]beep,   [77]flash,
-       [78]curs_set.
-     * the driver handles repainting on endwin/refresh combination.
-     * modified  treatment  of  TERM  variable  for  MinGW  port to allow
-       explicit use of the Windows console driver by checking if $TERM is
-       set to "#win32console" or an abbreviation of that.
-     * the Windows driver also matches the special TERM value "unknown"
-     * the driver now returns characters for special keys, (like ansi.sys
-       does),  when  keypad mode is off, rather than returning nothing at
-       all.
-     * the  driver checks a new environment variable [79]NCURSES_CONSOLE2
-       to  optionally  work  around  a  deficiency  in  Console2 (and its
-       descendent  ConsoleZ)  which  hang  when  an application creates a
-       console buffer.
-
-   Finally, there are other improvements:
-     * MinGW  is  one  of  the  configurations  where ncurses installs by
-       default into /usr
-     * configuration   for   cross-compiling   uses   AC_CHECK_TOOLS   in
-       preference  to  AC_PATH_PROGS  when searching for ncurses*-config,
-       e.g., in Ada95/configure and test/configure.
-     * extend Windows support to work with MSYS2;
-          + this  works  with  a  scenario  where there is an ANSI-escape
-            handler such as ansicon running in the console window.
-          + wrap  isatty  calls with a macro, provide a corresponding set
-            of  support routines to address differences between MinGW and
-            MSYS2.
-     * ensure WINVER is defined in makefiles rather than using headers.
-     * add check for the gnatprep "-T" option.
-     * work  around  a  bug  introduced  by  [80]gcc 4.8.1 in MinGW which
-       breaks "trace" feature.
-     * add a driver-name method to each of the drivers.
-
-    Other ports
-
-   These changes affect certain platforms (ports):
-     * the  configure  script  knows  how  to build shared libraries with
-       DragonFlyBSD and Interix.
-     * support for AIX shared libraries is improved, tested with AIX 5.3,
-       6.1 and 7.1 with both gcc 4.2.4 and cc:
-          + the shared-library suffix for AIX 5 and 6 is now ".so"
-          + the  -brtl  option is used with AIX 5-7; it is needed to link
-            with the shared libraries.
-     * the  configure  --enable-pc-files  option  takes  into account the
-       [81]PKG_CONFIG_PATH variable.
-     * the  configure  option  --with-pkg-config-libdir  provides control
-       over the actual directory into which pc-files are installed.
-     * the  build  scripts  add  explicit -ltinfo, etc., to the generated
-       ".pc"  file  when ld option "--as-needed" is used, or when ncurses
-       and tinfo are installed without using rpath.
-     * the     configure    script    disallows    conflicting    options
-       "--with-termlib" and "--enable-term-driver".
-     * the  check  for  missing  c++  compiler  to  work when no error is
-       reported,   and  no  variables  set  is  improved  (see  note  for
-       [82]20021206).
-     * the  misc/gen_edit.sh  script  selects a "linux" entry which works
-       with  the  current  kernel  rather  than  assuming  it  is  always
-       "linux3.0"
-     * the  test/configure  script  makes it simpler to override names of
-       curses-related  libraries,  to  help with linking with pdcurses in
-       MinGW environment.
-     * the  configure-script/ifdef's  allow the BSD OLD_TTY feature to be
-       suppressed  if  the  type of ospeed is configured using the option
-       --with-ospeed  to  not  be  a short. By default, it is a short for
-       termcap-compatibility.
-     * the  MKlib_gen.sh  script  works  around  a recent change in gcc 5
-       (released  [83]mid-2015)  which  essentially  emits multiple #line
-       statements for the same position in a file.
-     * the   configure  script  works  with  Minix3.2  (see  [84]note  on
-       portability)
-     * OS/2 redux:
-          + the configure script supports OS/2 kLIBC.
-          + the  --with-lib-prefix  option allows configuring for old/new
-            flavors of OS/2 EMX.
-     * improved configure-script checks for _XOPEN_SOURCE:
-          + the definition works starting with Solaris 10.
-          + the  definition  is  suppressed  for IRIX64, since its header
-            files have a conflict versus _SGI_SOURCE.
+   Many  of  the  portability  changes  are implemented via the configure
+   script:
+     * ignore $TERMINFO as a default value in configure script if it came
+       from the infocmp -Q option.
+     * distinguish  gcc  from  icc  and  clang when the --enable-warnings
+       option   is   not   used,  to  avoid  unnecessary  warnings  about
+       unrecognized inline options
+     * consistently  prepend  new  libraries  as  they  are  found during
+       configuration,  rather  than  relying  upon  the linker to resolve
+       order dependencies of libraries.
+     * modified  configure  scripts  to  reduce  relinking/ranlib  during
+       library install :
+          + use  "install -p" when available, to avoid need for ranlib of
+            static libraries.
+          + scripts which use "--disable-relink;" add a 1-second sleep to
+            work around tools which use whole-second timestamps, e.g., in
+            utime rather than the actual file system resolution.
+     * add configure check for getenv to work around implementation shown
+       in  Emscripten  which overwrites the previous return value on each
+       call.
+       Use  that  to optionally suppress START_TRACE macro, whose call to
+       getenv may not work properly
+     * change  target configure level for _XOPEN_SOURCE to 600 to address
+       use of vsscanf and setenv.
+     * reduce  use of _GNU_SOURCE for current glibc where _DEFAULT_SOURCE
+       combines with _XOPEN_SOURCE
+       Allow  for  Cygwin's  newlib when checking for the _DEFAULT_SOURCE
+       symbol.
+       MidnightBSD   is   now   checked   for  the  _XOPEN_SOURCE-related
+       definitions.
+     * If the check for va_copy or __va_copy fails,
+          + configure  now  tries copying the pointers for va_list, or as
+            an array.
+          + alternatively, it checks for __builtin_va_copy(), which could
+            be used with AIX xlc in c89 mode.
+     * several changes to support a port to Ultrix 3.1:
+          + check if "b" binary feature of fopen works
+          + check for missing feature of locale.h
+          + add fallback for strstr() in test-programs
+          + add fallback for STDOUT_FILENO in test-programs
+     * The test/configure script (used for ncurses-examples) is improved:
+          + work around non-ncurses termcap.h file, e.g., in Slackware.
+          + check for TABSIZE variable.
+          + checks  for  the  X11/Intrinsic.h  header, accommodate recent
+            MacOS changes which largely emptied /usr/include.
+
+   Here are some of the other portability fixes:
+     * added  dummy  "check"  rule  in  top-level  and  test-Makefile  to
+       simplify building test-packages for ArchLinux.
+     * dropped   library-dependency   on  psapi  for  MinGW  port,  since
+       win_driver.c   defines   PSAPI_VERSION   to   2,   making  it  use
+       GetProcessImageFileName from kernel32.dll
+     * made  build-fixes  for  configuration  using --program-suffix with
+       Ada95,  noticed  with  MacOS  but  applicable  to  other platforms
+       without libpanelw, etc.
+     * modified  ncurses/Makefile.in  to  fix a case where Debian/testing
+       changes to the ld --as-needed configuration broke ncurses-examples
+       test packages.
+     * used   _WIN32/_WIN64   in  preference  to  __MINGW32__/__MINGW64__
+       symbols  to simplify building with Microsoft Visual C++, since the
+       former are defined in both compiler configurations.

      _________________________________________________________________
 
 Features of ncurses
      _________________________________________________________________
 
 Features of ncurses


@@ -863,10 +751,10 @@ Features of ncurses
        types  even  when  no  terminfo tree or termcap file is accessible
        (this  may  be useful for support of screen-oriented programs that
        must run in single-user mode).
        types  even  when  no  terminfo tree or termcap file is accessible
        (this  may  be useful for support of screen-oriented programs that
        must run in single-user mode).

-     * The  [85]tic/[86]captoinfo  utility  provided with ncurses has the
-       ability  to  translate  many termcaps from the XENIX, IBM and AT&T
-       extension sets.
-     * A BSD-like [87]tset utility is provided.
+     * The tic/captoinfo utility provided with ncurses has the ability to
+       translate  many  termcaps  from  the XENIX, IBM and AT&T extension
+       sets.
+     * A BSD-like tset utility is provided.

      * The ncurses library and utilities will automatically read terminfo
        entries  from  $HOME/.terminfo  if  it exists, and compile to that
        directory  if  it  exists  and the user has no write access to the
      * The ncurses library and utilities will automatically read terminfo
        entries  from  $HOME/.terminfo  if  it exists, and compile to that
        directory  if  it  exists  and the user has no write access to the


@@ -881,132 +769,152 @@ Features of ncurses
        other entries in the same source file (as in System V) but also to
        compiled  entries  in  either the system terminfo directory or the
        user's $HOME/.terminfo directory.
        other entries in the same source file (as in System V) but also to
        compiled  entries  in  either the system terminfo directory or the
        user's $HOME/.terminfo directory.

-     * The  table-of-entries  utility  [88]toe makes it easy for users to
-       see exactly what terminal types are available on the system.
+     * The  table-of-entries  utility  toe makes it easy for users to see
+       exactly what terminal types are available on the system.

      * The library meets the XSI requirement that every macro entry point
        have  a  corresponding  function  which may be linked (and will be
        prototype-checked)  if  the  macro  definition  is  disabled  with
        #undef.
      * The library meets the XSI requirement that every macro entry point
        have  a  corresponding  function  which may be linked (and will be
        prototype-checked)  if  the  macro  definition  is  disabled  with
        #undef.

-     * Extensive   documentation  is  provided  (see  the  [89]Additional
-       Reading section of the [90]ncurses FAQ for online documentation).
+     * Extensive  documentation  is  provided (see the Additional Reading
+       section of the ncurses FAQ for online documentation).

 
 Applications using ncurses
 
    The  ncurses  distribution  includes  a  selection  of  test  programs
    (including   a   few   games).   These  are  available  separately  as
 
 Applications using ncurses
 
    The  ncurses  distribution  includes  a  selection  of  test  programs
    (including   a   few   games).   These  are  available  separately  as

-   [91]ncurses-examples
+   ncurses-examples

 
    The   ncurses   library  has  been  tested  with  a  wide  variety  of
    applications including:
 
 
    The   ncurses   library  has  been  tested  with  a  wide  variety  of
    applications including:
 

+   aptitude
+          FrontEnd to Apt, the debian package manager
+
+          https://wiki.debian.org/Aptitude
+

    cdk
           Curses Development Kit
 
    cdk
           Curses Development Kit
 

-          [92]http://invisible-island.net/cdk/
+          https://invisible-island.net/cdk/

 
    ded
           directory-editor
 
 
    ded
           directory-editor
 

-          [93]http://invisible-island.net/ded/
+          https://invisible-island.net/ded/

 
    dialog
           the  underlying  application used in Slackware's setup, and the
           basis   for  similar  install/configure  applications  on  many
           systems.
 
 
    dialog
           the  underlying  application used in Slackware's setup, and the
           basis   for  similar  install/configure  applications  on  many
           systems.
 

-          [94]http://invisible-island.net/dialog/
+          https://invisible-island.net/dialog/

 
    lynx
           the text WWW browser
 
 
    lynx
           the text WWW browser
 

-          [95]http://lynx.isc.org/
-
-   Midnight Commander
-          file manager
-
-          [96]http://www.midnight-commander.org/
+          https://lynx.invisible-island.net/

 
    mutt
           mail utility
 
 
    mutt
           mail utility
 

-          [97]http://www.mutt.org/
+          http://www.mutt.org/

 
    ncftp
           file-transfer utility
 
 
    ncftp
           file-transfer utility
 

-          [98]http://www.ncftp.com/
+          https://www.ncftp.com/

 
    nvi
           New vi uses ncurses.
 
 
    nvi
           New vi uses ncurses.
 

-          [99]https://sites.google.com/a/bostic.com/keithbostic/nvi
+          https://sites.google.com/a/bostic.com/keithbostic/vi
+
+   ranger
+          A console file manager with VI key bindings in Python.
+
+          https://ranger.github.io/

 
    tin
           newsreader, supporting color, MIME
 
 
    tin
           newsreader, supporting color, MIME
 

-          [100]http://www.tin.org/
+          http://www.tin.org/
+
+   vifm
+          File manager with vi like keybindings
+
+          https://vifm.info/

 
    as well as some that use ncurses for the terminfo support alone:
 
    minicom
           terminal emulator for serial modem connections
 
 
    as well as some that use ncurses for the terminfo support alone:
 
    minicom
           terminal emulator for serial modem connections
 

-          [101]http://alioth.debian.org/projects/minicom/
+          https://alioth.debian.org/projects/minicom/

 
    mosh
           a replacement for ssh.
 
 
    mosh
           a replacement for ssh.
 

-          [102]https://mosh.mit.edu/
+          https://mosh.mit.edu/

 
    tack
           terminfo action checker
 
 
    tack
           terminfo action checker
 

-          [103]http://invisible-island.net/ncurses/tack.html
+          https://invisible-island.net/ncurses/tack.html

 
    tmux
           terminal multiplexor
 
 
    tmux
           terminal multiplexor
 

-          [104]http://tmux.github.io/
+          https://github.com/tmux/tmux/wiki

 
    vile
           vi-like-emacs  may  be  built  to  use the terminfo, termcap or
           curses interfaces.
 
 
    vile
           vi-like-emacs  may  be  built  to  use the terminfo, termcap or
           curses interfaces.
 

-          [105]http://invisible-island.net/vile/
+          https://invisible-island.net/vile/

 
    and finally, those which use only the termcap interface:
 
    emacs
           text editor
 
 
    and finally, those which use only the termcap interface:
 
    emacs
           text editor
 

-          [106]http://www.gnu.org/software/emacs/
+          https://www.gnu.org/software/emacs/
+
+   less
+          The  most  commonly  used  pager  (a program that displays text
+          files).
+
+          http://www.greenwoodsoftware.com/less/

 
    screen
           terminal multiplexor
 
 
    screen
           terminal multiplexor
 

-          [107]http://www.gnu.org/software/screen/
+          https://www.gnu.org/software/screen/

 
    vim
           text editor
 
 
    vim
           text editor
 

-          [108]http://www.vim.org/
+          https://www.vim.org/

 
 Development activities
 
    Zeyd  Ben-Halim  started  ncurses  from  a  previous  package pcurses,
    written  by  Pavel  Curtis.  Eric  S.  Raymond  continued development.
 
 Development activities
 
    Zeyd  Ben-Halim  started  ncurses  from  a  previous  package pcurses,
    written  by  Pavel  Curtis.  Eric  S.  Raymond  continued development.

-   Juergen  Pfeifer  wrote  most  of the form and menu libraries. Ongoing
-   development  work  is  done  by [109]Thomas Dickey. Thomas Dickey also
-   acts  as  the maintainer for the Free Software Foundation, which holds
-   the [110]copyright on ncurses.
+   Juergen Pfeifer wrote most of the form and menu libraries.
+
+   Ongoing development work is done by Thomas E. Dickey. Thomas E. Dickey
+   has  acted  as  the maintainer for the Free Software Foundation, which
+   holds  a  copyright on ncurses for releases 4.2 through 6.1. Following
+   the release of ncurses 6.1, effective as of release 6.2, copyright for
+   ncurses  reverted  to  Thomas  E.  Dickey  (see  the  ncurses  FAQ for
+   additional information).

 
    Contact the current maintainers at
 
 
    Contact the current maintainers at
 

-     [111]bug-ncurses@gnu.org
+     bug-ncurses@gnu.org

 
    To join the ncurses mailing list, please write email to
 
 
    To join the ncurses mailing list, please write email to
 

-     [112]bug-ncurses-request@gnu.org
+     bug-ncurses-request@gnu.org

 
    containing the line:
 
 
    containing the line:
 


@@ -1015,211 +923,60 @@ Development activities
    This list is open to anyone interested in helping with the development
    and testing of this package.
 
    This list is open to anyone interested in helping with the development
    and testing of this package.
 

-   Beta  versions  of ncurses and patches to the current release are made
-   available at
+   Beta versions of ncurses are made available at
+
+     ftp://ftp.invisible-island.net/ncurses/current/ and
+     https://invisible-mirror.net/archives/ncurses/current/ .
+
+   Patches to the current release are made available at

 
 

-     [113]ftp://invisible-island.net/ncurses/ .
+     ftp://ftp.invisible-island.net/ncurses/6.1/ and
+     https://invisible-mirror.net/archives/ncurses/6.1/ .

 
    There is an archive of the mailing list here:
 
 
    There is an archive of the mailing list here:
 

-     [114]http://lists.gnu.org/archive/html/bug-ncurses            (also
-     [115]https)
+     http://lists.gnu.org/archive/html/bug-ncurses (also https)

 
 Related resources
 
    The  release notes make scattered references to these pages, which may
    be interesting by themselves:
 
 Related resources
 
    The  release notes make scattered references to these pages, which may
    be interesting by themselves:

-     * [116]man2html
-     * [117]ncurses licensing
-     * [118]Symbol versioning in ncurses
-     * [119]The MinGW port of ncurses
-     * [120]tack - terminfo action checker
-     * [121]tar versus portability
-     * [122]tctest - termcap library checker
-     * [123]Terminal Database
+     * ncurses licensing
+     * Symbol versioning in ncurses
+     * Comments on ncurses versus slang (S-Lang)
+     * tack - terminfo action checker
+     * tctest - termcap library checker
+     * Terminal Database

 
 Other resources
 
    The  distribution  provides  a  newer  version  of the terminfo-format
 
 Other resources
 
    The  distribution  provides  a  newer  version  of the terminfo-format

-   terminal  description  file  once  maintained  by  [124]Eric Raymond .
-   Unlike  the  older version, the termcap and terminfo data are provided
-   in  the  same  file,  and  provides  several user-definable extensions
-   beyond the X/Open specification.
+   terminal description file once maintained by Eric Raymond . Unlike the
+   older  version, the termcap and terminfo data are provided in the same
+   file, which also provides several user-definable extensions beyond the
+   X/Open specification.

 
    You  can  find  lots  of  information  on  terminal-related topics not
 
    You  can  find  lots  of  information  on  terminal-related topics not

-   covered in the terminfo file at [125]Richard Shuford's archive .
-
-     * [126]Overview
-     * [127]Release Notes
-          + [128]Library improvements
-               o [129]Output buffering
-               o [130]Symbol versioning
-               o [131]Miscellaneous
-          + [132]Program improvements
-               o [133]Utilities
-               o [134]Examples
-          + [135]Terminal database
-          + [136]Documentation
-          + [137]Interesting bug-fixes
-          + [138]Configuration changes
-               o [139]Major changes
-               o [140]Configuration options
-          + [141]Portability
-               o [142]MinGW
-               o [143]Other ports
-     * [144]Features of ncurses
-     * [145]Applications using ncurses
-     * [146]Development activities
-     * [147]Related resources
-     * [148]Other resources
-
-References
-
-   1. http://invisible-island.net/ncurses/man/captoinfo.1m.html
-   2. http://invisible-island.net/ncurses/man/clear.1.html
-   3. http://invisible-island.net/ncurses/man/infocmp.1m.html
-   4. http://invisible-island.net/ncurses/man/tabs.1.html
-   5. http://invisible-island.net/ncurses/man/tic.1m.html
-   6. http://invisible-island.net/ncurses/man/toe.1m.html
-   7. http://invisible-island.net/ncurses/man/tput.1.html
-   8. http://invisible-island.net/ncurses/man/tset.1.html
-   9. ftp://ftp.gnu.org/gnu/ncurses/
-  10. ftp://invisible-island.net/ncurses/
-  11. http://invisible-island.net/ncurses/tctest.html
-  12. http://invisible-island.net/ncurses/ncurses-examples.html
-  13. http://lists.gnu.org/archive/html/bug-ncurses/2012-07/msg00029.html
-  14. http://invisible-island.net/ncurses/NEWS.html#t20050101
-  15. http://invisible-island.net/ncurses/announce-5.5.html
-  16. http://invisible-island.net/ncurses/ncurses-mapsyms.html
-  17. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-initscr
-  18. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-newterm
-  19. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Initialization
-  20. http://invisible-island.net/ncurses/man/ncurses.3x.html#h3-NCURSES_NO_SETBUF
-  21. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html
-  22. http://invisible-island.net/ncurses/man/curs_kernel.3x.html#h3-reset_prog_mode_-reset_shell_mode
-  23. http://invisible-island.net/ncurses/man/curs_kernel.3x.html#h3-reset_prog_mode_-reset_shell_mode
-  24. http://invisible-island.net/ncurses/man/curs_printw.3x.html
-  25. http://invisible-island.net/ncurses/ncurses-mapsyms.html
-  26. http://invisible-island.net/ncurses/tack.html
-  27. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-use_tioctl
-  28. http://invisible-island.net/ncurses/man/curs_opaque.3x.html
-  29. http://invisible-island.net/ncurses/man/curs_attr.3x.html#h2-PORTABILITY
-  30. http://invisible-island.net/ncurses/man/form_field_opts.3x.html
-  31. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-putwin_getwin
-  32. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-putwin_getwin
-  33. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Formatting-Output
-  34. http://invisible-island.net/ncurses/tctest.html
-  35. http://invisible-island.net/ncurses/tctest.html#my-better-translation
-  36. http://invisible-island.net/ncurses/NEWS.html#t980103
-  37. https://svnweb.freebsd.org/base/head/lib/libc/gen/getcap.c?revision=244092&view=markup#l784
-  38. http://invisible-island.net/ncurses/ncurses-examples.html
-  39. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-use_env
-  40. http://invisible-island.net/ncurses/man/curs_window.3x.html#h3-derwin
-  41. http://invisible-island.net/ncurses/man/curs_window.3x.html#h3-mvwin
-  42. http://invisible-island.net/ncurses/man/form_driver.3x.html#h3-form_driver_w
-  43. http://invisible-island.net/ncurses/terminfo.src.html#toc-_M_L_T_E_R_M
-  44. http://invisible-island.net/ncurses/terminfo.src.html#tic-nsterm
-  45. http://invisible-island.net/ncurses/terminfo.src.html#tic-putty-sco
-  46. http://invisible-island.net/ncurses/terminfo.src.html#tic-teken
-  47. http://invisible-island.net/ncurses/terminfo.src.html#toc-_T_E_R_M_I_N_A_T_O_R
-  48. http://invisible-island.net/ncurses/terminfo.src.html#toc-_T_E_R_M_I_N_O_L_O_G_Y
-  49. http://invisible-island.net/ncurses/terminfo.src.html#tic-tmux
-  50. http://invisible-island.net/ncurses/terminfo.src.html#toc-_S_I_M_P_L_E_T_E_R_M
-  51. http://invisible-island.net/ncurses/terminfo.src.html#tic-vte
-  52. http://invisible-island.net/ncurses/terminfo.src.html#tic-vt520ansi
-  53. http://aerie.jexium-island.net/ncurses/man/clear.1.html
-  54. http://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_sl
-  55. http://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-1005
-  56. http://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-1006
-  57. http://invisible-island.net/ncurses/NEWS.html
-  58. http://invisible-island.net/scripts/man2html.html
-  59. http://invisible-island.net/ncurses/NCURSES-Programming-HOWTO.html
-  60. http://invisible-island.net/ncurses/NEWS.html#t20110319
-  61. http://invisible-island.net/ncurses/NEWS.html#t20021221
-  62. http://invisible-island.net/ncurses/man/curs_color.3x.html#h3-Routine-Descriptions
-  63. http://invisible-island.net/ncurses/man/default_colors.3x.html
-  64. http://invisible-island.net/ncurses/man/curs_color.3x.html#h3-Routine-Descriptions
-  65. http://invisible-island.net/ncurses/man/resizeterm.3x.html
-  66. http://invisible-island.net/ncurses/NEWS.html#t980725
-  67. http://invisible-island.net/ncurses/NEWS.html#t960418
-  68. http://invisible-island.net/ncurses/NEWS.html#t970405
-  69. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-set_term
-  70. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-delscreen
-  71. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Formatting-Output
-  72. http://docs.oracle.com/cd/E19253-01/html/817-0552/fhkpy.html
-  73. http://invisible-island.net/ncurses/announce-5.9.html
-  74. http://invisible-island.net/ncurses/announce-5.8.html
-  75. http://invisible-island.net/ncurses/ncurses-examples.html
-  76. http://invisible-island.net/ncurses/man/curs_beep.3x.html
-  77. http://invisible-island.net/ncurses/man/curs_beep.3x.html
-  78. http://invisible-island.net/ncurses/man/curs_kernel.3x.html#h3-curs_set
-  79. http://invisible-island.net/ncurses/man/ncurses.3x.html#h3-NCURSES_CONSOLE2
-  80. http://stackoverflow.com/questions/20877689/gcc-4-8-1-minggw-d-option-does-not-work-as-usual
-  81. http://linux.die.net/man/1/pkg-config
-  82. http://invisible-island.net/ncurses/NEWS.html#t20021206
-  83. https://gcc.gnu.org/gcc-5/
-  84. http://invisible-island.net/autoconf/portability-test.html
-  85. http://invisible-island.net/ncurses/man/tic.1m.html
-  86. http://invisible-island.net/ncurses/man/captoinfo.1m.html
-  87. http://invisible-island.net/ncurses/man/tset.1.html
-  88. http://invisible-island.net/ncurses/man/toe.1m.html
-  89. http://invisible-island.net/ncurses/ncurses.faq.html#additional_reading
-  90. http://invisible-island.net/ncurses/ncurses.faq.html
-  91. http://invisible-island.net/ncurses/ncurses-examples.html
-  92. http://invisible-island.net/cdk/
-  93. http://invisible-island.net/ded/
-  94. http://invisible-island.net/dialog/
-  95. http://lynx.isc.org/
-  96. http://www.midnight-commander.org/
-  97. http://www.mutt.org/
-  98. http://www.ncftp.com/
-  99. https://sites.google.com/a/bostic.com/keithbostic/nvi
- 100. http://www.tin.org/
- 101. http://alioth.debian.org/projects/minicom/
- 102. https://mosh.mit.edu/
- 103. http://invisible-island.net/ncurses/tack.html
- 104. http://tmux.github.io/
- 105. http://invisible-island.net/vile/
- 106. http://www.gnu.org/software/emacs/
- 107. http://www.gnu.org/software/screen/
- 108. http://www.vim.org/
- 109. mailto:dickey@invisible-island.net
- 110. http://invisible-island.net/ncurses/ncurses-license.html
- 111. mailto:bug-ncurses@gnu.org
- 112. mailto:bug-ncurses-request@gnu.org
- 113. ftp://invisible-island.net/ncurses/
- 114. http://lists.gnu.org/archive/html/bug-ncurses
- 115. https://lists.gnu.org/archive/html/bug-ncurses
- 116. http://invisible-island.net/scripts/man2html.html
- 117. http://invisible-island.nethttp://invisible-island.net/ncurses/ncurses-license.html
- 118. http://invisible-island.net/ncurses/ncurses-mapsyms.html
- 119. http://invisible-island.net/ncurses/ncurses-mingw.html
- 120. http://invisible-island.net/ncurses/tack.html
- 121. http://invisible-island.net/autoconf/portability-tar.html
- 122. http://invisible-island.net/ncurses/tctest.html
- 123. http://invisible-island.net/ncurses/ncurses.html#download_database
- 124. http://www.catb.org/~esr/terminfo/
- 125. http://web.archive.org/web/*/http://www.cs.utk.edu/~shuford/terminal
- 126. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-overview
- 127. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-release-notes
- 128. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-library
- 129. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-lib-setbuf
- 130. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-lib-versioning
- 131. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-lib-other
- 132. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-programs
- 133. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-utilities
- 134. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-examples
- 135. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-database
- 136. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-documentation
- 137. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-bug-fixes
- 138. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-config-config
- 139. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-config-major
- 140. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-config-options
- 141. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h3-portability
- 142. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-port-mingw
- 143. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h4-port-systems
- 144. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-features
- 145. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-who-uses
- 146. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-development
- 147. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-this-stuff
- 148. file:///usr/build/ncurses/ncurses-6.0-20150808/doc/html/announce.html#h2-other-stuff
+   covered  in  the  terminfo  file  at  Richard  Shuford's archive . The
+   collection of computer manuals at bitsavers.org has also been useful.
+
+     * Overview
+     * Release Notes
+          + Library improvements
+               o New features
+               o Other improvements
+          + Program improvements
+               o Utilities
+               o Examples
+          + Terminal database
+          + Documentation
+          + Interesting bug-fixes
+          + Configuration changes
+               o Major changes
+               o Configuration options
+          + Portability
+     * Features of ncurses
+     * Applications using ncurses
+     * Development activities
+     * Related resources
+     * Other resources