Updated: ncurses/-demo libncurses/-devel/++/w10 terminfo/-extra 6.4-3.20230114

Cygwin ncurses Maintainer Brian.Inglis@Shaw.ca
Sun Feb 12 00:20:21 GMT 2023


The following packages have been upgraded in the Cygwin distribution:

* ncurses			6.4-3.20230114
* ncurses-demo			6.4-3.20230114
* libncurses-devel		6.4-3.20230114
* libncurses++w10		6.4-3.20230114
* libncursesw10			6.4-3.20230114
* terminfo			6.4-3.20230114
* terminfo-extra		6.4-3.20230114

These packages have been available in test for a few weeks, 
no newer release is available and no issues have been reported, 
so this release is being promoted to current stable.

The ncurses (new curses) library is an emulation of Sys V R 4
curses, and more. It uses terminfo format, supports pads, color,
multiple highlights, forms characters, function key mapping,
and has all the other SVR4 curses enhancements over BSD curses.

For more information see the project home page:

	https://invisible-island.net/ncurses

As there are multiple components and many changes each release see below
or read /usr/share/doc/ncurses/ANNOUNCE and /usr/share/doc/ncurses/NEWS
after installation:

	https://invisible-island.net/ncurses/announce.html#h2-release-notes


20230114

* change RV to XR/xr, to avoid conflict with pre-existing usage in vim,
  to use RV/rv to denote DA2 and its response
* add XF flag to xterm+focus so that termcap applications can be aware
  of terminals which may support focus in/out
* use xterm+focus in xterm-p370 and tmux
* improve configure-script macros vs compiler warnings.

20230107

* add --with-abi-altered configure option.
* add BSD erase2 to characters handled by tset/reset.
* improve configure-script macros vs compiler warnings.
* regenerate configure scripts with autoconf 2.52.20221202
* add RV report+version.
* add comment to bracketed+paste explaining that vim patch 9.0.1117 is
  needed for use with the updated xterm descriptions.

20221231 6.4 release

* update release notes
* regenerate llib-* files.
* correct PS vs PE names in bracketed+paste

Release Notes

These notes are for ncurses 6.4, released January 14, 2023.

This  release  is  designed  to  be source-compatible with ncurses 5.0
through  6.3; 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  robustness
issues.  The  release notes also mention some other bug-fixes, but are
focused  on  new  features and improvements to existing features since
ncurses 6.3 release.

Library improvements

New features

There are no new features in this release.

Other improvements

These are improvements to existing features:
* modify  delscreen  to  more  effectively delete all windows on the
  given screen.
* modify  wnoutrefresh  to  call  pnoutrefresh if its parameter is a
  pad,  rather than treating it as an error, and modify new_panel to
  permit its window-parameter to be a pad
* modify  curses_trace()  to  show  the trace-mask as symbols, e.g.,
  TRACE_ORDINARY, DEBUG_LEVEL(3).
* improve  checks  for valid mouse events when an intermediate mouse
  state is not part of the mousemask specified by the caller
* allow extended-color number in opts parameter of wattr_on.
* improve _tracecchar_t2 formatting of base+combining character.
* trim  out some unwanted linker options from ncurses*config and .pc
  files seen in Fedora 36+.
* improve shell-scripts with shellcheck
* improve use of "trap" in shell scripts, using a script.
* modify make-tar.sh scripts to make timestamps more predictable.

These are corrections to existing features:
* modify  misc/gen-pkgconfig.in  to  allow  for  the  case where the
  library  directory  does  not  yet  exist, since this is processed
  before doing an install
* set trailing null on string passed from winsnstr to wins_nwstr.
* modify  waddch_literal  to  allow  for double-width base character
  when merging a combining character

Program improvements

Several improvements were made to the utility programs:

infocmp

* rewrite  canonical_name  function of infocmp to ensure buffer
  size
* improve  readability  of  long parameterized expressions with
  the  infocmp  "-f"  option  by  allowing  split before a "%p"
  marker.
* modify   verbose-option   of  infocmp,  tic,  toe  to  enable
  debug-tracing if that is configured.

tabs
      limit tab-stop values to max-columns

tic
      add   consistency   check   in   tic  for  u6/u7/u8/u9  and  NQ
      capabilities.

tput
      corrected use of original tty-modes in init/reset subcommands

Examples

Along  with  the  library and utilities, improvements were made to the
ncurses-examples.  Most  of  this  activity  aimed  at  improving  the
test-packages:
* add  minimal  -h  (usage)  and  -V  (version)  getopt logic to all
  ncurses-examples programs.
* fix an error in "@" command in test/ncurses.c F-menu
* add curses_trace to ifdef's for START_TRACE in test/test.priv.h
* improve pthread-configuration for test/worm.c
* add setlocale call to several test-programs.
* workaround  in  test/picsmap.c  for  use of floating point for rgb
  values by ImageMagick 6.9.11, which appears to use the wrong upper
  limit.
* use  static libraries for AdaCurses test-package for Mageia, since
  no gprbuild package is available.
* install  Ada95  sample  programs  in  libexecdir, adding a wrapper
  script to invoke those.
* install  ncurses-examples programs in libexecdir, adding a wrapper
  script to invoke those.

There are other new demo/test programs and reusable examples:

test/combine
      demonstrate combining characters

test/test_delwin
      demonstrate deleting a window

test/test_mouse
      observe  mouse  events  in  the  raw terminal or parsed ncurses
      modes

test/test_unget_wch
      demonstrate the unget_wch and unget functions

Terminal database

There are several new terminal descriptions:
* mosh
* mosh-256color
* teken-16color
* teken-sc
* teken-vt
* xgterm

There  are  many  changes to existing terminal descriptions. Some were
updates to several descriptions:
* make description-fields distinct
* fix errata in description fields
* add/use several building-blocks:
  - aixterm+sl
  - ansi+cpr
  - apollo+vt132
  - decid+cpr
  - ncr260vp+sl
  - wyse+sl
  - x10term+sl
  - xterm+acs
  - xterm+alt47

while  others  affected specific descriptions. These were retested, to
take into account changes by their developers:
* kitty
* teken

while  these are specific fixes based on reviewing documentation, user
reports, or warnings from tic:

att610+cvis0
      amended note as per documentation for att610, att620, att730

kon, kon2, jfbterm
      revise to undo "linux2.6" change to smacs/rmacs/enacs

st-0.6
      add dim, ecma+strikeout

foot+base
      add xterm+sl-alt

dec+sl
      correct dsl in dec+sl

mintty and tmux
      correct setal in mintty/tmux entries, add to vte-2018

nsterm
      modify nsterm to use xterm+alt1049

putty
      modify putty to use xterm+alt1049

vte-2018
      add blink and setal

A few entries use extensions (user-defined terminal capabilities):
* use  ansi+enq  and  decid+cpr in cases where the terminal probably
  supported the u6-u9 extension
* remove u6-u9 from teken-2018
* use  NQ  to flag entries where the terminal does not support query
  and response
* add/use bracketed+paste to help identify terminals supporting this
  xterm feature
* modify  samples  for xterm mouse 1002/1003 modes to use 1006 mode,
  and also provide for focus in/out responses
* xterm  patch  #371 supports DEC-compatible status-line. add dec+sl
  to  xterm-new, per xterm #371, add xterm-p371, add xterm-p370, for
  use  in  older  terminals, and set "xterm-new" to "xterm-p370" (to
  ease adoption).

Documentation

As usual, this release
* improves documentation by describing new features,
* attempts  to  improve the description of features which users have
  found confusing
* fills  in overlooked descriptions of features which were described
  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:
  - remove a stray '/' from description of %g in terminfo(5).
  - correct/improve  font-formatting in curs_getch.3x, as well as
    other manual pages.
* New/improved history and portability sections:
  - add portability notes for delscreen and delwin in manual.
  - improve curs_slk.3x discussion of extensions and portability
* Other improvements:
  - improve  curs_bkgd.3x,  explaining  that  bkgdset  can affect
    results for bkgd
  - add note on portable memory-leak checking in curs_memleaks.3x
  - expanded description in resizeterm.3x
  - add  section  on  releasing  memory  to  curs_termcap.3x  and
    curs_terminfo.3x manpages.
  - add  clarification  of  the  scope  of  dynamic  variables in
    terminfo(5).
  - improve formatting of ncurses-intro.html and hackguide.html
  - improve curs_clear.3x links to other pages
  - update  ncurses-howto,  making documentation fixes along with
    corrections to example programs.
  - use  newer  version  1.36 of gnathtml for generating Ada html
    files.
  - update external links in Ada95.html

There  are  no new manual pages (all of the manual page updates are to
existing pages).

Interesting bug-fixes

While  there  were  many bugs fixed during development of ncurses 6.4,
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 those dealing with memory leaks and buffer
overflows.  Although  the utilities are designed for text files (which
they do properly), some choose to test them with non-text files.
* Text  files  contain  no  embedded  nulls.  Also,  they end with a
  newline.  Feeding tic non-text files exposed a few cases where the
  program  did  not  check  for  those  issues. As a result, further
  processing  of the input found limit-checks whose assumptions were
  invalid.
* Fixing  the limit-checks (first) found a problem with tic managing
  the  list  of  strings  in  a terminal description. In merging two
  terminal  descriptions  (i.e.,  the  "use="  feature), tic was not
  allocating  a  complete copy. A quick repair for that introduced a
  memory leak.
* The  checks  for non-text files are improved (i.e., embedded nulls
  in  the  input  file  will  cause  tic  to  reject  it rather than
  attempting to process it).
* The string allocations in tic are likewise improved.

Configuration changes

Major changes

There  are  no  major  changes.  No  new  options  were added. Several
improvements were made to configure checks.

Configuration options

There are a few new/modified configure options:

--with-abi-version
      add ABI 7 defaults to configure script.

--with-caps
      add   warning   in  configure  script  if  file  specified  for
      "--with-caps" does not exist.

--with-manpage-format
      bzip2 and xz compression are now supported

--with-xterm-kbs
      add    check/warning    in    configure    script   if   option
      "--with-xterm-kbs" is missing or inconsistent

Portability

Many  of  the  portability  changes  are implemented via the configure
script:
* amend  configure option's auto-search to account for systems where
  none of the directories known to pkg-config exist
* corrected regex needed for older pkg-config used in Solaris 10
* improve  handling of --with-pkg-config-libdir option, allowing for
  the case where either $PKG_CONFIG_LIBDIR or the option value has a
  colon-separated list of directories
* if   the   --with-pkg-config-libdir   option  is  not  given,  use
  ${libdir}/pkgconfig as a default
* improve search-path check for pkg-config, e.g., for Debian testing
  which installs pkg-config with architecture-prefixes.
* build-fix for cross-compiling to MingW, conditionally add -lssp
* improve configure check for getttynam
* fixes to build with dietlibc:
     + add configure check for fpathconf
     + add   configure   check   for  math  sine/cosine,  needed  in
       test/tclock, and eliminate pow() from test/hanoi
     + use wcsnlen as an alternative to wmemchr if it is not found
* modify  configure macro CF_BUILD_CC to check if the build-compiler
  works,  rather  than that it is different from the cross-compiler,
  e.g.,  to  accommodate  a  compiler  which  can be used for either
  purpose with different flags
* modify  configure/scripts  to work around interference by GNU grep
  3.8

Here are some of the other portability fixes:
* change  man_db.renames  to  template,  to  handle  ncurses*-config
  script with the --extra-suffix configure option.
* update   CF_XOPEN_SOURCE  macro,  adding  variants  "gnueabi"  and
  "gnueabihf" to get _DEFAULT_SOURCE special case, as well as adding
  GNU  libc  suffixes for "abi64", "abin32", "x32" to distinguish it
  from other libc flavors.
* work  around  musl's  nonstandard  use  of  feature test macros by
  adding  a  definition  for NCURSES_WIDECHAR to the generated ".pc"
  and *-config files.
* use  "command  -v"  rather than "type" in Ada95/gen/Makefile.in to
  fix a portability issue.



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