ncurses 6.4 - patch 20221231

[ncurses.git] / ANNOUNCE

diff --git a/ANNOUNCE b/ANNOUNCE
index 0684b3dc41d7e5df96990f73f9201f4b40b7d747..45b1a0ea025c0d9222aa3e39d66433549d8712e1 100644 (file)
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-                            Announcing ncurses 6.3
+                            Announcing ncurses 6.4

 
 Overview
 
 
 Overview
 


@@ -40,19 +40,19 @@ Overview
 
    The ncurses distribution is available at ncurses' homepage:
 
 
    The ncurses distribution is available at ncurses' homepage:
 

-     ftp://ftp.invisible-island.net/ncurses/ or
+     https://invisible-island.net/archives/ncurses/ or

      https://invisible-mirror.net/archives/ncurses/ .
 
      https://invisible-mirror.net/archives/ncurses/ .
 

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

 
 

-     ftp://ftp.gnu.org/gnu/ncurses/ .
+     https://ftp.gnu.org/gnu/ncurses/ .

 
 Release Notes
 
 
 Release Notes
 

-   These notes are for ncurses 6.3, released October 21, 2021.
+   These notes are for ncurses 6.4, released December 31, 2022.

 
    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  6.2; providing extensions to the application binary interface
+   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.
    (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.


@@ -60,240 +60,179 @@ Release Notes
    There  are,  of  course,  numerous  other improvements, listed in this
    announcement.
 
    There  are,  of  course,  numerous  other improvements, listed in this
    announcement.
 

-   The  most  important  bug-fixes/improvements  dealt  with  portability
+   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
    issues.  The  release notes also mention some other bug-fixes, but are
    focused  on  new  features and improvements to existing features since

-   ncurses 6.2 release.
+   ncurses 6.3 release.

 
   Library improvements
 
     New features
 
 
   Library improvements
 
     New features
 

-   There are a few new features:
-     * A   new   (experimental)   driver,   for   the   Windows  Terminal
-       configuration is provided.
-     * A  script is provided which enables OpenBSD users to upgrade their
-       system  to use ncurses 6.3 (OpenBSD developers are also invited to
-       do this).
-
-   Additionally,  to  improve  performance other changes (and extensions)
-   are provided in this release:
-     * modify  lib_mouse.c  to  check  for  out-of-range  button numbers,
-       convert those to position reports.
-     * add sp-funcs for erasewchar, killwchar.
+   There are no new features in this release.

 
     Other improvements
 
 
     Other improvements
 

-   These are revised features:
-     * modify  wgetnstr,  wgetn_wstr  to  improve compatibility with SVr4
-       curses in its treatment of interrupt and quit characters
-
-   These were done to limit or ultimately deprecate features:
-     * mark wgetch-events feature as deprecated.
-          + prevent  KEY_EVENT  from  appearing  in  curses.h  unless the
-            configure option --enable-wgetch-events is used.
-          + modify   MKkey_defs.sh   to   hide   ncurses'  definition  of
-            KEY_EVENTS to reduce Visual Studio C++ redefinition warnings.
-     * reduce   build-warnings   by   excluding   ncurses-internals  from
-       deprecation warnings.
-

    These are improvements to existing features:
    These are improvements to existing features:

-     * drop symbols GCC_PRINTF and GCC_SCANF from <curses.h>, to simplify
-       use.
-     * apply  gcc  format  attribute  to  prototypes  which use a va_list
-       parameter rather than a "..." variable-length parameter list.
-     * modify  <term.h> so that it is not necessary to include <curses.h>
-       before <term.h>.
-     * provide for wide-characters as background character in wbkgrnd
-     * improve parameter-checking for tparm, adding function _nc_tiparm()
-       to   handle   the  most-used  case,  which  accepts  only  numeric
-       parameters.
-     * use  return-value  from vsnprintf to reallocate as needed to allow
-       for buffers larger than the screen size.
-     * add  another  fflush(stdout) in _nc_flush to handle time-delays in
-       the  middle  of  strings  such  as flash when the application uses
-       low-level calls rather than curses.
+     * 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:
 
    These are corrections to existing features:

-     * add  a  check  to  guard against repeat_char emitting digits which
-       could  be interpreted as BSD-style padding when --enable-bsdpad is
-       configured.
-     * check  for screen size-change in scr_init and scr_restore, in case
-       a screen dump does not match the current screen dimensions
+     * 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:
 
 
   Program improvements
 
    Several improvements were made to the utility programs:
 

-   tabs
+   infocmp

 
 

-          + implement "+m" option
+          + 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.

 
 

-   tic
+   tabs
+          limit tab-stop values to max-columns

 
 

-          + add check for duplicate "use=" clauses.
-          + add  check  to  report  instances where tparm would detect an
-            error in an expression.
-          + add  user-defined  capabilities  from mintty to Caps-ncurses,
-            for checking consistency.
-          + improve warning when oc/op do not mention SGR 39/49 for xterm
-            compatible XT flag.
-          + improve  checks  for  number  of  parameters of smglp, smgrp,
-            smgtp, and smgbp.
-          + improve  "-c"  option  to  validate  the  number  and type of
-            parameters  and  compare  against expected number/type before
-            deciding which set of parameter-lists to use in tparm calls.
-          + improve check for errors detected in tparm.
-          + improve format of output, to ensure that the messages contain
-            only printable text.
-          + modify to eliminate unnecessary "\" to escape ":" in terminfo
-            format.
-          + remove check that assumes that none or both parameterized and
-            non-parameterized margin-setting capabilities are present.
-
-   toe
-
-          + modify  output  of  "toe -as" to show first description found
-            rather than the last.
-          + add  a  check  to ensure that a "termcap file" is text rather
-            than binary.
+   tic
+          add   consistency   check   in   tic  for  u6/u7/u8/u9  and  NQ
+          capabilities.

 
    tput
 
    tput

-
-          + modify to allow multiple commands per line.
-          + improve  parameter-checking  by analyzing all extended string
-            capabilities,  e.g., as used in the Cs and Ms capabilities of
-            the tmux description.
-          + make  warning  messages  consistently  using alias names when
-            those are used, rather than the underlying program's name.
-          + improve   usage   message  for  aliases  such  as  clear,  by
-            eliminating tput-specific portions.
-          + modify  initialization  to  avoid  opening /dev/tty for cases
-            other than reset/init, e.g., for clear.
+          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
 
     Examples
 
    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:
-     * add  "-r" option to the dots test-programs, to help with scripting
-       a performance comparison.
-     * build-fix  for  test_opaque,  for  configurations  without  opaque
-       curses structs, e.g., ncurses 5.7.
-     * improve tracemunch logic for "RUN" compaction.
-     * improve tracemunch's coverage of form/menu/panel libraries.
-     * improve  tracemunch's  checking/reporting  the  type for the first
-       parameter, e.g., "WINDOW*" rather than "#1".
-     * modify  tracemunch  and  the panel library to show readable traces
-       for panel- and user-pointers.
+   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:
 
 
    There are other new demo/test programs and reusable examples:
 

-   back_ground
-          to exercise the wide-character background functions.
+   test/combine
+          demonstrate combining characters
+
+   test/test_delwin
+          demonstrate deleting a window

 
 

-   move_field
-          to  demonstrate move_field, and a stub for a corresponding demo
-          of dup_field.
+   test/test_mouse
+          observe  mouse  events  in  the  raw terminal or parsed ncurses
+          modes

 
 

-   test_tparm
-          for checking tparm changes.
+   test/test_unget_wch
+          demonstrate the unget_wch and unget functions

 
   Terminal database
 
    There are several new terminal descriptions:
 
   Terminal database
 
    There are several new terminal descriptions:

-
-     absolute,    att610+cvis,    foot,    foot-direct,   hp98550-color,
-     hpterm-color2,   hterm,   hterm-256color,   linux-s,  putty+keypad,
-     putty+screen,    putty-screen,    screen.linux-s,   scrt/securecrt,
-     tmux-direct,  vt220+cvis,  vt220+cvis8, vt220+pcedit, vt220+vtedit,
-     vt220-base,     vt52+keypad,    xterm+256color2,    xterm+88color2,
-     xterm-direct16,       xterm-direct256,      xterm+nofkeys,      and
-     xterm+nopcfkeys.
+     * mosh
+     * mosh-256color
+     * teken-16color
+     * teken-sc
+     * teken-vt
+     * xgterm

 
    There  are  many  changes to existing terminal descriptions. Some were
    updates to several descriptions:
 
    There  are  many  changes to existing terminal descriptions. Some were
    updates to several descriptions:

-     * correct use-ordering in some xterm-direct flavors
-     * fix   some   sgr   inconsistencies  in  d230c,  ibm6153,  ibm6154,
-       ncrvt100an
-     * improve vt50h and vt52 based on DECScope manual
-     * use hp+arrows in a few places
-     * use hp+pfk-cr in a few places
-     * use  vt220+cvis  in  st,  terminology,  termite  since they ignore
-       blinking-cursor detail in att610+cvis
+     * 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:
 
    while  others  affected specific descriptions. These were retested, to
    take into account changes by their developers:

-
-     kitty+common, mlterm3, ms-terminal
+     * kitty
+     * teken

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

-   aaa+dec, aaa+rv
-          correct rmacs/smacs
+   att610+cvis0
+          amended note as per documentation for att610, att620, att730

 
 

-   aaa+rv
-          correct sgr
+   kon, kon2, jfbterm
+          revise to undo "linux2.6" change to smacs/rmacs/enacs

 
 

-   icl6404
-          correct csr
+   st-0.6
+          add dim, ecma+strikeout

 
 

-   kitty
-          use att610+cvis, xterm+tmux and ansi+enq
+   foot+base
+          add xterm+sl-alt

 
 

-   konsole-base
-          re-enable "bel"
+   dec+sl
+          correct dsl in dec+sl

 
 

-   linux2.6
-          fix pound-sign mapping in acsc
+   mintty and tmux
+          correct setal in mintty/tmux entries, add to vte-2018

 
 

-   linux3.0
-          modify to reflect default mapping of shift-tab by kbd 1.14
-
-   pccons
-          fill in some missing pieces, to make it comparable to the vt220
-          entry
+   nsterm
+          modify nsterm to use xterm+alt1049

 
    putty
 
    putty

-          use vt100+fnkeys, add rep
-
-   screen
-          use vt100+enq
+          modify putty to use xterm+alt1049

 
 

-   terminator
-          corrected tsl capability
-
-   ti916
-          correct cup
-
-   tmux
-          change kbs to ^?
-
-   vt220
-          use vt220+cvis
-
-   vt420+lrmm
-          add smglp and smgrp
-
-   vt420
-          use vt420+lrmm
-
-   xterm-new
-          add nel
-
-   xterm-vt52
-          use vt52+keypad
+   vte-2018
+          add blink and setal

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

-     * add   shifted   Linux  console  keys  in  linux+sfkeys  entry  for
-       screen.linux
-     * add Smulx to alacritty
-     * add kbeg to xterm+keypad to accommodate termcap applications
-     * add  extensions  in  xterm+tmux and ecma+strikeout to ms-terminal,
-       but cancel the non-working Cr and Ms 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
 
 
   Documentation
 


@@ -308,164 +247,123 @@ Release Notes
    features   and   show   how   they  evolved,  there  are  corrections,
    clarifications, etc.:
      * Corrections:
    features   and   show   how   they  evolved,  there  are  corrections,
    clarifications, etc.:
      * Corrections:

-          + make  opts  extension  for  getcchar  work  as documented for
-            ncurses 6.1, adding "-g" flag to demo_new_pair to illustrate.
-          + modify  tset  "-q"  option to refrain from modifying terminal
-            modes, to match the documentation.
+          + 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:
      * New/improved history and portability sections:

-          + improve documentation for tparm and static/dynamic variables.
-          + add   history   note  to  curs_scanw.3x  for  <stdarg.h>  and
-            <varargs.h>
-          + add   history  note  to  curs_printw.3x  for  <stdarg.h>  and
-            <varargs.h>
-          + add portability note to ncurses.3x regarding <stdarg.h>
-          + add   historical   notes   to   tput,   curses-terminfo   and
-            curses-color manpages based on source-code for SVr2, SVr3 and
-            SVr4.
-          + improve  history  section  for tset manpage based on the 1BSD
-            tarball,  which  preceded  BSD's  SCCS  checkins by more than
-            three years.
+          + add portability notes for delscreen and delwin in manual.
+          + improve curs_slk.3x discussion of extensions and portability

      * Other improvements:
      * Other improvements:

-          + explain  in ncurses.3x that functions in the tinfo library do
-            not rely upon wide-characters.
-          + improve   manual   page  for  panel  library,  extending  the
-            portability section as well as documenting error-returns.
-          + add  section  on  margins  to terminfo.5, adapted from X/Open
-            Curses.
-          + improve man/term.5 section on legacy storage format.
-          + add a note in terminfo.5 explaining that no-parameter strings
-            such as sgr0 or cnorm should not be used with tparm.
-          + improve description of BSD-style padding in curs_termcap.3x
-          + improve  discussion  of  padding  versus  tparm  and tputs in
-            man/curs_terminfo.3x
-          + add a note in manual page to explain ungetch vs unget_wch.
-          + improve  description  of error-returns in waddch and waddnstr
-            manual pages.
+          + 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).
 
 
    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, hyphenation is suppressed in
-   the HTML files generated from manual pages because an upgrade to groff
-   gave  noticeably  poorer  results,  interfering  with  the  process of
-   creating links between the resulting webpages.
-

   Interesting bug-fixes
 
   Interesting bug-fixes
 

-   While  there  were  many bugs fixed during development of ncurses 6.3,
+   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.
 
    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:
-     * modify wbkgd and wbkgrnd to avoid storing a null in the background
-       character, because it may be used in cases where the corresponding
-       0x80 is not treated as a null.
-       This  was  a regression introduced in ncurses 6.2 (reported on the
-       mailing list), for which the workaround was to specify a blank for
-       the background character.
-     * remove  output-related  checks  for  nl/nonl (also reported on the
-       mailing list).
-     * improve  tparm  implementation of %P and %g, more closely matching
-       SVr4  terminfo.  Those  denote  static  and  dynamic  variables in
-       terminfo expressions.
-       Exactly  what those terms meant was never documented before in any
-       implementation of curses, aside from source code. Unlike the other
-       two  fixes,  the  problem  was discovered while studying OpenBSD's
-       version of tset.
+   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
 
 
   Configuration changes
 
     Major changes
 

-   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.
+   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:
 
 
     Configuration options
 
    There are a few new/modified configure options:
 

-   --enable-fvisibility
-          new  configure  option  and  check  for gcc -fvisibility=hidden
-          feature
-
-   --enable-leaks
-          corrected  to allow turning leak-checking off later in a set of
-          options.
-
-   --enable-stdnoreturn
-          new  configure  option  makes the _Noreturn keyword optional to
-          ease transition.
-
-   --disable-pkg-ldflags
-          revised option also controls whether $LDFLAGS from the build is
-          provided in "-config" and ".pc" files.
-
-   --disable-root-access
-          add  configure  option  which  tells  ncurses  to disallow most
-          file-opens by setuid processes.
+   --with-abi-version
+          add ABI 7 defaults to configure script.

 
 

-   --disable-wattr-macros
-          changed  default  to  help  packagers  who  reuse wide ncursesw
-          header file with non-wide ncurses library.
+   --with-caps
+          add   warning   in  configure  script  if  file  specified  for
+          "--with-caps" does not exist.

 
 

-   --with-pkg-config-libdir
-          revised  option  uses the actual search path from pkg-config or
-          pkgconf using the output from --debug.
+   --with-manpage-format
+          bzip2 and xz compression are now supported

 
 

-   --with-ada-libname
-          --with-form-libname
-          --with-menu-libname
-          --with-panel-libname
-          new several --with-xxx-libname options, to help with pkgsrc
+   --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:
 
   Portability
 
    Many  of  the  portability  changes  are implemented via the configure
    script:

-     * add  a  special case in the configure script to work around one of
-       the build-time breakages reported for OpenBSD 6 here:
-
-     https://www.mail-archive.com/bugs@openbsd.org/msg13200.html
-     * modify configure check for libtool to prevent accidental use of an
-       OpenBSD program which uses the same name.
-     * modify  configuration  checks  for  build-time  tic/infocmp to use
-       AC_CHECK_TOOL. That can still be overridden by --with-tic-path and
-       --with-infocmp-path when fallbacks are used, but even if not using
-       fallbacks, the improved check may help with cross-compiling.
-     * relax modification-time comparison in CF_LINK_FUNCS to allow it to
-       accept link() function with NFS filesystems which change the mtime
-       on the link target, e.g., several BSD systems.
-     * modify  configure  check  for  c89/c99 aliases of clang to use its
-       -std  option instead, because some platforms, in particular macOS,
-       do not provide workable c89/c99 aliases.
-     * modify  CF_NCURSES_CONFIG  to work around Xcode's c99 "-W" option,
-       which conflicts with conventional use for passing linker options.
-     * modify   configure   scripts   to   filter  out  redefinitions  of
-       _XOPEN_SOURCE,  e.g., for NetBSD which generally supports 500, but
-       600 is needed for ncursesw.
+     * 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:
 
    Here are some of the other portability fixes:

-     * change   configure-check   and   source-code  for  gcc's  noreturn
-       attribute  to  assume  it is a prefix rather than suffix, matching
-       c11's _Noreturn convention.
-     * modify mk-1st.awk to account for extra-suffix configure option.
-     * build-fix for termsort module when configured with termcap.
-     * modify  configure  script  and  makefiles to support ".PHONY" make
-       program feature.
-     * amend  libtool  configuration  to  add dependency for install.tic,
-       etc., in ncurses/Makefile on the lower-level libraries.
-     * modify Ada95 source-generation utility to write to a file given as
-       parameter rather than to the standard output, allowing builds with
-       MinGW.
-     * amend  tic/infocmp  check  to  allow  for  the  respective  tool's
-       absence.
-     * build-fixes for gnat 10.1.1, whose gnatmake drops integration with
-       gprbuild.
-     * correct configure version-check/warning for g++ to allow for 10.x
+     * 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.

      _________________________________________________________________
 
 Features of ncurses
      _________________________________________________________________
 
 Features of ncurses


@@ -717,13 +615,13 @@ Development activities
 
    Beta versions of ncurses are made available at
 
 
    Beta versions of ncurses are made available at
 

-     ftp://ftp.invisible-island.net/ncurses/current/ and
+     https://invisible-island.net/archives/ncurses/current/ and

      https://invisible-mirror.net/archives/ncurses/current/ .
 
    Patches to the current release are made available at
 
      https://invisible-mirror.net/archives/ncurses/current/ .
 
    Patches to the current release are made available at
 

-     ftp://ftp.invisible-island.net/ncurses/6.2/ and
-     https://invisible-mirror.net/archives/ncurses/6.2/ .
+     https://invisible-island.net/archives/ncurses/6.3/ and
+     https://invisible-mirror.net/archives/ncurses/6.3/ .

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