ncurses 6.3 - patch 20211021
[ncurses.git] / doc / html / announce.html
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-  * Copyright 2018-2019,2020 Thomas E. Dickey                                *
+  * Copyright 2018-2020,2021 Thomas E. Dickey                                *
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-  <title>Announcing ncurses 6.2</title>
+  "HTML Tidy for HTML5 for Linux version 5.6.0">
+  <title>Announcing ncurses 6.3</title>
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-  <h1 class="no-header">Announcing ncurses 6.2</h1>
+  <h1 class="no-header">Announcing ncurses 6.3</h1>
 
   <h2><a name="h2-overview" id="h2-overview">Overview</a></h2>
 
   including</p>
 
   <ul>
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/captoinfo.1m.html"><span class="part-name">
-    captoinfo</span></a>, a termcap conversion tool</li>
+    <li><a href="https://invisible-island.net/ncurses/man/captoinfo.1m.html"><span class=
+    "part-name">captoinfo</span></a>, a termcap conversion
+    tool</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/clear.1.html"><span class="part-name">
-    clear</span></a>, utility for clearing the screen</li>
+    <li><a href="https://invisible-island.net/ncurses/man/clear.1.html"><span class=
+    "part-name">clear</span></a>, utility for clearing the
+    screen</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/infocmp.1m.html"><span class="part-name">
-    infocmp</span></a>, the terminfo decompiler</li>
+    <li><a href="https://invisible-island.net/ncurses/man/infocmp.1m.html"><span class=
+    "part-name">infocmp</span></a>, the terminfo decompiler</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/tabs.1.html"><span class="part-name">
-    tabs</span></a>, set tabs on a terminal</li>
+    <li><a href="https://invisible-island.net/ncurses/man/tabs.1.html"><span class=
+    "part-name">tabs</span></a>, set tabs on a terminal</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/tic.1m.html"><span class="part-name">
-    tic</span></a>, the terminfo compiler</li>
+    <li><a href="https://invisible-island.net/ncurses/man/tic.1m.html"><span class=
+    "part-name">tic</span></a>, the terminfo compiler</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/toe.1m.html"><span class="part-name">
-    toe</span></a>, list (table of) terminfo entries</li>
+    <li><a href="https://invisible-island.net/ncurses/man/toe.1m.html"><span class=
+    "part-name">toe</span></a>, list (table of) terminfo
+    entries</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/tput.1.html"><span class="part-name">
-    tput</span></a>, utility for retrieving terminal capabilities
-    in shell scripts</li>
+    <li><a href="https://invisible-island.net/ncurses/man/tput.1.html"><span class=
+    "part-name">tput</span></a>, utility for retrieving terminal
+    capabilities in shell scripts</li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/man/tset.1.html"><span class="part-name">
-    tset</span></a>, to initialize the terminal</li>
+    <li><a href="https://invisible-island.net/ncurses/man/tset.1.html"><span class=
+    "part-name">tset</span></a>, to initialize the terminal</li>
   </ul>
 
   <p>Full manual pages are provided for the library and tools.</p>
   Notes</a></h2>
 
   <p>These notes are for <span class="main-name">ncurses</span>
-  6.2, released <strong>February 12, 2020</strong>.</p>
+  6.3, released <strong>October 21, 2021</strong>.</p>
 
   <p>This release is designed to be source-compatible with
-  <span class="main-name">ncurses</span> 5.0 through 6.1; providing
+  <span class="main-name">ncurses</span> 5.0 through 6.2; providing
   extensions to the application binary interface (ABI). Although
   the source can still be configured to support the <span class=
   "main-name">ncurses</span> 5 ABI, the reason for the release is
   this announcement.</p>
 
   <p>The most <a href="#h3-bug-fixes">important
-  bug-fixes/improvements</a> 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 <span class="main-name">ncurses</span>
-  6.1 release.</p>
+  bug-fixes/improvements</a> dealt with portability issues. The
+  release notes also mention some other bug-fixes, but are focused
+  on new features and improvements to existing features since
+  <span class="main-name">ncurses</span> 6.2 release.</p>
 
   <h3><a name="h3-library" id="h3-library">Library improvements</a></h3>
 
   <h4><a name="h4-new-library" id="h4-new-library">New features</a></h4>
 
-  <p>There are several new features:</p>
+  <p>There are a few new features:</p>
 
   <ul>
     <li>
-      <p><a href=
-      "https://invisible-island.net/ncurses/man/form_field_opts.3x.html">
-      O_EDGE_INSERT_STAY</a> tells the form library to optionally
-      delay cursor movement on a field edge/boundary</p>
-    </li>
-
-    <li>
-      <p><a href=
-      "https://invisible-island.net/ncurses/man/form_field_opts.3x.html">
-      O_INPUT_FIELD</a> extension to form library allows a dynamic
-      field to shrink if the new limit is smaller than the current
-      field size.</p>
+      <p>A new (experimental) driver, for the Windows Terminal
+      configuration is provided.</p>
     </li>
 
     <li>
-      <p>added <a href=
-      "https://invisible-island.net/ncurses/man/curs_memleaks.3x.html">
-      exit_curses</a> and <a href=
-      "https://invisible-island.net/ncurses/man/curs_memleaks.3x.html">
-      exit_terminfo</a> to replace internal symbols for
-      leak-checking.</p>
-    </li>
-
-    <li>
-      <p>added <a href=
-      "https://invisible-island.net/ncurses/man/curs_trace.3x.html#h3-Functions">
-      curses_trace</a>, to replace trace().</p>
+      <p>A script is provided which enables <a href=
+      "https://invisible-island.net/ncurses/ncurses-openbsd.html">OpenBSD</a> users to
+      upgrade their system to use ncurses 6.3 (OpenBSD developers
+      are also invited to do this).</p>
     </li>
   </ul>
 
 
   <ul>
     <li>
-      <p>mouse decoding now handles shift/control/alt logic when
-      decoding xterm's 1006 mode</p>
-    </li>
-
-    <li>
-      <p>ncurses now defines a limit for <a href=
-      "https://invisible-island.net/ncurses/man/curs_getstr.3x.html">
-      wgetnstr</a>, <a href=
-      "https://invisible-island.net/ncurses/man/curs_get_wstr.3x.html">
-      wgetn_wstr</a> when length is negative or &ldquo;too
-      large&rdquo;.</p>
-    </li>
-
-    <li>reordered loop-limit checks in <a href=
-    "https://invisible-island.net/ncurses/man/curs_insstr.3x.html">winsnstr</a>
-    in case the string has no terminating null and only the number
-    of characters is used.</li>
-
-    <li>
-      <p>there is now no buffer-size limit when reading the
-      <a href="https://invisible-island.net/ncurses/man/ncurses.3x.html#h3-TERMCAP">
-      <tt>$TERMCAP</tt></a> variable.</p>
-    </li>
-
-    <li>
-      <p>the <a href=
-      "https://invisible-island.net/ncurses/man/ncurses.3x.html#h3-TERMCAP">
-      <tt>$TERMCAP</tt></a> variable may be interpreted as a
-      fallback to a terminfo entry</p>
+      <p>modify lib_mouse.c to check for out-of-range button
+      numbers, convert those to position reports.</p>
     </li>
 
     <li>
-      <p><a href=
-      "https://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Output-Functions">
-      <tt>mvcur</tt></a> now decides whether to use hard-tabs,
-      using <strong><tt>xt</tt></strong>,
-      <strong><tt>tbc</tt></strong> and
-      <strong><tt>hts</tt></strong> as clues.</p>
-    </li>
-
-    <li>
-      <p>extended colors are improved by modifying an internal call
-      to <a href=
-      "https://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Output-Functions">
-      <tt>vid_puts</tt></a> to pass extended color pairs e.g., from
-      <tt>tty_update.c</tt> and <tt>lib_mvcur.c</tt></p>
-    </li>
-
-    <li>
-      <p id="getenv-fixes">the initialization functions now avoid
-      relying upon persistent data for the result from <a href=
-      "#getenv-check"><tt>getenv</tt></a></p>
-    </li>
-
-    <li>
-      <p>scrolling is improved:</p>
-
-      <ul>
-        <li>a limit check in <tt>newline_forces_scroll</tt> handles
-        the case where the row is inside scroll-margins, but not at
-        the end.</li>
-
-        <li>
-          <p>improved loop limits in <tt>_nc_scroll_window</tt>
-          handle a case where the scrolled data is a pad which is
-          taller than the window.</p>
-        </li>
-      </ul>
+      <p>add sp-funcs for <a href=
+      "https://invisible-island.net/ncurses/man/curs_termattrs.3x.html#h3-erasechar_-erasewchar">
+      erasewchar</a>, <a href=
+      "https://invisible-island.net/ncurses/man/curs_termattrs.3x.html#h3-killchar_-killwchar">
+      killwchar</a>.</p>
     </li>
   </ul>
 
   <p>These are revised features:</p>
 
   <ul>
-    <li>
-      <p>used &ldquo;<tt>const</tt>&rdquo; in some prototypes
-      rather than <tt>NCURSES_CONST</tt> where X/Open Curses was
-      updated to do this, e.g., <tt>wscanw</tt>, <tt>newterm</tt>,
-      the terminfo interface. Also use &ldquo;<tt>const</tt>&rdquo;
-      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 &ldquo;<tt>const</tt>&rdquo; for certain
-      return values, e.g., <a href=
-      "https://invisible-island.net/ncurses/man/curs_util.3x.html#h3-keyname_key_name">
-      keyname</a>.</p>
-    </li>
-
-    <li>
-      <p>modified <a href=
-      "https://invisible-island.net/ncurses/man/curs_bkgd.3x.html#h3-bkgd">
-      <tt>wbkgd</tt></a> and <a href=
-      "https://invisible-island.net/ncurses/man/curs_bkgrnd.3x.html#h3-bkgrnd">
-      <tt>wbkgrnd</tt></a> to improve compatibility with SVr4
-      curses, changing the way the window rendition is updated when
-      the background character is modified</p>
-    </li>
-
-    <li>
-      <p>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 <a href=
-      "https://invisible-island.net/ncurses/man/term.5.html#h3-EXTENDED-STORAGE-FORMAT">
-      term(5)</a>).</p>
-    </li>
-
-    <li>
-      <p>modified the initialization checks for mouse so that the
-      <a href=
-      "/ncurses/terminfo.src.html#tic-xterm_sm_1006"><tt>xterm+sm+1006</tt></a>
-      block will work with terminal descriptions not mentioning
-      <em>xterm</em>.</p>
-    </li>
+    <li>modify wgetnstr, wgetn_wstr to improve compatibility with
+    SVr4 curses in its treatment of interrupt and quit
+    characters</li>
   </ul>
 
   <p>These were done to limit or ultimately deprecate features:</p>
 
   <ul>
     <li>
-      <p>deprecated <a href=
-      "https://invisible-island.net/ncurses/NEWS.html#t970831">safe-sprintf</a>,
-      since the <tt>vsnprintf</tt> function, which does what was
-      needed, was standardized long ago.</p>
-    </li>
+      <p>mark wgetch-events feature as deprecated.</p>
 
-    <li>
-      <p>marked <a href=
-      "https://invisible-island.net/ncurses/man/curs_printw.3x.html#h2-PORTABILITY">
-      <tt>vwprintw</tt></a> and <tt>vwscanw</tt> as deprecated;
-      recommend using <a href=
-      "https://invisible-island.net/ncurses/man/curs_printw.3x.html">
-      <tt>vw_printw</tt></a> and <tt>vw_scanw</tt>,
-      respectively.</p>
-    </li>
+      <ul>
+        <li>
+          <p>prevent <tt>KEY_EVENT</tt> from appearing in
+          <tt>curses.h</tt> unless the configure option
+          <code>--enable-wgetch-events</code> is used.</p>
+        </li>
 
-    <li>
-      <p>added deprecation warnings for internal functions called
-      by older versions of <a href=
-      "https://invisible-island.net/ncurses/tack.html">tack</a>.</p>
+        <li>
+          <p>modify <tt>MKkey_defs.sh</tt> to hide ncurses'
+          definition of <tt>KEY_EVENTS</tt> to reduce <em>Visual
+          Studio C++</em> redefinition warnings.</p>
+        </li>
+      </ul>
     </li>
 
     <li>
-      <p>removed unused <tt>_nc_import_termtype2</tt> function.</p>
+      <p>reduce build-warnings by excluding ncurses-internals from
+      deprecation warnings.</p>
     </li>
   </ul>
 
 
   <ul>
     <li>
-      <p>check parameter of <a href=
-      "https://invisible-island.net/ncurses/man/curs_threads.3x.html">
-      set_escdelay</a>, return ERR if negative.</p>
-    </li>
-
-    <li>
-      <p>check parameter of <a href=
-      "https://invisible-island.net/ncurses/man/curs_threads.3x.html">
-      set_tabsize</a>, return ERR if not greater than zero</p>
-    </li>
-
-    <li>
-      <p>correct a status-check in _nc_read_tic_entry() so that if
-      reading a hex/b64 <a href=
-      "https://invisible-island.net/ncurses/man/ncurses.3x.html#h3-TERMINFO">
-      <tt>$TERMINFO</tt></a>, and the <a href=
-      "https://invisible-island.net/ncurses/man/ncurses.3x.html#h3-TERM">
-      <tt>$TERM</tt></a> does not match, fall-through to the
-      compiled-in search list.</p>
-    </li>
-
-    <li>
-      <p>amend check for <a href=
-      "https://invisible-island.net/ncurses/man/terminfo.5.html#h3-Predefined-Capabilities">
-      <tt>repeat_char</tt></a> to handle a case where setlocale()
-      was called after <a href=
-      "https://invisible-island.net/ncurses/man/curs_initscr.3x.html">
-      <tt>initscr</tt></a></p>
-    </li>
-
-    <li>
-      <p>move macro for <a href=
-      "https://invisible-island.net/ncurses/man/curs_touch.3x.html">
-      <tt>is_linetouched</tt></a> inside
-      <strong><tt>NCURSES_NOMACROS</tt></strong>
-      <em><tt>ifndef</tt></em>.</p>
-    </li>
-
-    <li>
-      <p>use <tt>_nc_copy_termtype2</tt> rather than direct
-      assignment in <a href=
-      "https://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Initialization">
-      setupterm</a>, in case it is called repeatedly using fallback
-      terminfo descriptions</p>
-    </li>
-
-    <li>
-      <p>improve workaround for Solaris wcwidth versus line-drawing
-      characters</p>
+      <p>drop symbols <em>GCC_PRINTF</em> and <em>GCC_SCANF</em>
+      from &lt;curses.h&gt;, to simplify use.</p>
     </li>
 
     <li>
-      <p>add checks in <a href=
-      "https://invisible-island.net/ncurses/man/resizeterm.3x.html">
-      <tt>repair_subwindows</tt></a> to keep the current position
-      and scroll-margins inside the resized subwindow.</p>
+      <p>apply gcc format attribute to prototypes which use a
+      va_list parameter rather than a &ldquo;<tt>...</tt>&rdquo;
+      variable-length parameter list.</p>
     </li>
 
     <li>
-      <p>correct a buffer-limit in <tt>write_entry.c</tt> for
-      systems that use caseless filenames.</p>
+      <p>modify &lt;term.h&gt; so that it is not necessary to
+      include &lt;curses.h&gt; before &lt;term.h&gt;.</p>
     </li>
 
     <li>
-      <p>improved build-time utility <em>report_offsets</em>:</p>
-
-      <ul>
-        <li>
-          <p>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.</p>
-        </li>
-
-        <li>
-          <p>add <tt>NCURSES_GLOBALS</tt> and
-          <tt>NCURSES_PRESCREEN</tt> to report to show how similar
-          the different <em>libtinfo</em> configurations are.</p>
-        </li>
-      </ul>
+      <p>provide for wide-characters as background character in
+      wbkgrnd</p>
     </li>
 
     <li>
-      <p>modified some header files to ensure that those include
-      necessary files except for the previously-documented
-      cases</p>
+      <p>improve parameter-checking for tparm, adding function
+      _nc_tiparm() to handle the most-used case, which accepts only
+      numeric parameters.</p>
     </li>
 
     <li>
-      <p>added some traces in initialization to show whether a
-      fallback entry is used.</p>
+      <p>use return-value from <em>vsnprintf</em> to reallocate as
+      needed to allow for buffers larger than the screen size.</p>
     </li>
 
     <li>
-      <p>made minor optimization to reduce calls to
-      _nc_reserve_pairs</p>
+      <p>add another <em>fflush(stdout)</em> in <em>_nc_flush</em>
+      to handle time-delays in the middle of strings such as flash
+      when the application uses low-level calls rather than
+      curses.</p>
     </li>
   </ul>
 
 
   <ul>
     <li>
-      <p>fix a special case in <tt>PutAttrChar</tt> 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 <em>vt52</em>, which
-      lacks most line-drawing capability.</p>
+      <p>add a check to guard against <em>repeat_char</em> emitting
+      digits which could be interpreted as BSD-style padding when
+      <tt>--enable-bsdpad</tt> is configured.</p>
     </li>
 
     <li>
-      <p>corrected flag for "seq" method of db 1.8.5 interface,
-      needed by toe on some of the BSDs.</p>
-    </li>
-
-    <li>
-      <p>modify comparison in make_hash.c to correct a special case
-      in collision handling for Caps-hpux11</p>
-    </li>
-
-    <li>
-      <p>add extended_slk_color{,_sp} symbols to the appropriate
-      package/*.{map,sym} files</p>
-    </li>
-
-    <li>
-      <p>modify lib_setup to avoid calling pthread_self() without
-      first verifying that the address is valid, i.e., for weak
-      symbols</p>
-    </li>
-
-    <li>
-      <p>add a couple of broken-linker symbols to the list of
-      versioned symbols to help with link-time optimization versus
-      weak symbols.</p>
+      <p>check for screen size-change in <a href=
+      "https://invisible-island.net/ncurses/man/curs_scr_dump.3x.html">scr_init</a> and
+      <a href=
+      "https://invisible-island.net/ncurses/man/curs_scr_dump.3x.html">scr_restore</a>, in
+      case a screen dump does not match the current screen
+      dimensions</p>
     </li>
   </ul>
 
   utility programs:</p>
 
   <dl>
-    <dt><span class="part-name">clear</span>
+    <dt><span class="part-name"><a href=
+    "https://invisible-island.net/ncurses/man/tabs.1.html">tabs</a></span>
     </dt>
 
     <dd>
       <ul>
-        <li>improved logic for clearing with the <em>E3</em>
-        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</li>
+        <li>
+          <p>implement &ldquo;<tt>+m</tt>&rdquo; option</p>
+        </li>
       </ul>
     </dd>
 
-    <dt><span class="part-name">infocmp</span>
+    <dt><span class="part-name"><a href=
+    "https://invisible-island.net/ncurses/man/tic.1m.html">tic</a></span>
     </dt>
 
     <dd>
       <ul>
-        <li>omit filtering of &ldquo;<tt>OTxx</tt>&rdquo; 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.</li>
-      </ul>
-    </dd>
+        <li>
+          <p>add check for duplicate &ldquo;<tt>use=</tt>&rdquo;
+          clauses.</p>
+        </li>
 
-    <dt><span class="part-name">tic</span>
-    </dt>
+        <li>
+          <p>add check to report instances where <tt>tparm</tt>
+          would detect an error in an expression.</p>
+        </li>
 
-    <dd>
-      <ul>
-        <li>added check for consistent alternate character set
-        capabilities.</li>
+        <li>
+          <p>add user-defined capabilities from <em>mintty</em> to
+          <tt>Caps-ncurses</tt>, for checking consistency.</p>
+        </li>
 
-        <li>added check for paired <tt>indn</tt>/<tt>rin</tt>.</li>
+        <li>
+          <p>improve warning when oc/op do not mention SGR 39/49
+          for <em>xterm</em> compatible <code>XT</code> flag.</p>
+        </li>
 
-        <li>added check for terminals with <tt>parm_dch</tt> vs
-        <tt>parm_ich</tt>.</li>
+        <li>
+          <p>improve checks for number of parameters of
+          <code>smglp</code>, <code>smgrp</code>,
+          <code>smgtp</code>, and <code>smgbp</code>.</p>
+        </li>
 
-        <li>added check for the case where
-        <tt>setf</tt>/<tt>setb</tt> are given using different
-        strings, but provide identical results to
-        <tt>setaf</tt>/<tt>setab</tt>.</li>
+        <li>
+          <p>improve &ldquo;<tt>-c</tt>&rdquo; 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.</p>
+        </li>
 
-        <li>corrected check for <tt>ich1</tt>.</li>
+        <li>
+          <p>improve check for errors detected in
+          <code>tparm</code>.</p>
+        </li>
 
-        <li>changed a too-large terminal entry from a fatal error
-        to a warning.</li>
-      </ul>
-    </dd>
+        <li>
+          <p>improve format of output, to ensure that the messages
+          contain only printable text.</p>
+        </li>
 
-    <dt><span class="part-name">toe</span>
-    </dt>
+        <li>
+          <p>modify to eliminate unnecessary
+          &ldquo;<code>\</code>&rdquo; to escape
+          &ldquo;<code>:</code>&rdquo; in terminfo format.</p>
+        </li>
 
-    <dd>
-      <ul>
-        <li>ignores any hex/b64 <tt>$TERMINFO</tt> value in the
-        list of terminfo databases.</li>
+        <li>
+          <p>remove check that assumes that none or both
+          parameterized and non-parameterized margin-setting
+          capabilities are present.</p>
+        </li>
       </ul>
     </dd>
 
-    <dt><span class="part-name">tset</span>
+    <dt><span class="part-name"><a href=
+    "https://invisible-island.net/ncurses/man/toe.1m.html">toe</a></span>
     </dt>
 
     <dd>
       <ul>
-        <li>replace check in <span class="part-name">reset</span>
-        command for obsolete &ldquo;<tt>pt</tt>&rdquo; capability
-        using <tt>tbc</tt> and <tt>hts</tt> capabilities as
-        clues</li>
-
-        <li>modify <span class="part-name">reset</span> to allow
-        for tabstops at intervals other than 8.</li>
-
-        <li>change <span class="part-name">reset</span>'s behavior
-        for margins to simply clear soft-margins if possible,
-        rather than clearing and then setting them according to the
-        terminal's width.</li>
+        <li>
+          <p>modify output of &ldquo;<tt>toe -as</tt>&rdquo; to
+          show first description found rather than the last.</p>
+        </li>
+
+        <li>
+          <p>add a check to ensure that a &ldquo;termcap
+          file&rdquo; is text rather than binary.</p>
+        </li>
       </ul>
     </dd>
 
-    <dt><span class="part-name">tput</span>
+    <dt><span class="part-name"><a href=
+    "https://invisible-island.net/ncurses/man/tput.1.html">tput</a></span>
     </dt>
 
     <dd>
       <ul>
-        <li>add &ldquo;<tt>x</tt>&rdquo; to <tt>getopt</tt> string
-        so that &ldquo;<tt>tput&nbsp;-x&nbsp;clear</tt>&rdquo;
-        works.</li>
-      </ul>
-    </dd>
-  </dl>
-
-  <p>Several changes were made to the generated ncurses*config
-  scripts and the analogous &ldquo;<tt>.pc</tt>&rdquo; files to
-  reduce differences between the configurations they report:</p>
+        <li>
+          <p>modify to allow multiple commands per line.</p>
+        </li>
 
-  <ul>
-    <li>
-      <p>modified the ncurse*-config and pc-files to more closely
-      match for the <tt>-I</tt> and <tt>-l</tt> options.</p>
-    </li>
+        <li>
+          <p>improve parameter-checking by analyzing all extended
+          string capabilities, e.g., as used in the <code>Cs</code>
+          and <code>Ms</code> capabilities of the <em>tmux</em>
+          description.</p>
+        </li>
 
-    <li>
-      <p>filtered out linker-specs from the <tt>--libs</tt>
-      report.</p>
-    </li>
+        <li>
+          <p>make warning messages consistently using alias names
+          when those are used, rather than the underlying program's
+          name.</p>
+        </li>
 
-    <li>
-      <p>amended the ncurses*-config and pc-files to take into
-      account the rpath hack which differed between those
-      files.</p>
-    </li>
+        <li>
+          <p>improve usage message for aliases such as
+          <em>clear</em>, by eliminating <em>tput</em>-specific
+          portions.</p>
+        </li>
 
-    <li>
-      <p>modified generated ncurses*config and ncurses.pc,
-      ncursesw.pc, etc., to list helper libraries such as gpm for
-      static linking.</p>
-    </li>
-  </ul>
+        <li>
+          <p>modify initialization to avoid opening
+          <tt>/dev/tty</tt> for cases other than
+          <em>reset/init</em>, e.g., for <em>clear</em>.</p>
+        </li>
+      </ul>
+    </dd>
+  </dl>
 
   <h4><a name="h4-examples" id="h4-examples">Examples</a></h4>
 
   <p>Along with the library and utilities, improvements were made
   to the <a href=
-  "https://invisible-island.net/ncurses/ncurses-examples.html">ncurses-examples</a>.
-  Most of this activity aimed at improving the test-packages. A few
-  changes are more generally useful, e.g., for the main ncurses
+  "https://invisible-island.net/ncurses/ncurses-examples.html">ncurses-examples</a>. 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
   <em>tracemunch</em> script:</p>
 
   <ul>
     <li>
-      <p>improve recovery from error when reading command-character
-      in <tt>test/ncurses.c</tt>, showing the relevant error
-      message and not exiting on EINTR.</p>
+      <p>add &ldquo;<tt>-r</tt>&rdquo; option to the <em>dots</em>
+      test-programs, to help with scripting a performance
+      comparison.</p>
     </li>
 
     <li>
-      <p>improve <em>tracemunch</em>, by keeping track of
-      <tt>TERMINAL*</tt> values, and if tracing was first turned on
-      after initialization, attempt to show distinct screen, window
-      and terminal names anyway.</p>
+      <p>build-fix for <em>test_opaque</em>, for configurations
+      without opaque curses structs, e.g., ncurses 5.7.</p>
     </li>
 
     <li>
-      <p>modify <em>tracemunch</em> to accept filename parameters
-      in addition to use as a pipe/filter.</p>
+      <p>improve <em>tracemunch</em> logic for "RUN"
+      compaction.</p>
     </li>
 
     <li>
-      <p>update <em>tracemunch</em> to work with <em>perl
-      5.26.2</em>, which changed the rules for escaping regular
-      expressions.</p>
+      <p>improve <em>tracemunch</em>'s coverage of form/menu/panel
+      libraries.</p>
     </li>
 
     <li>
-      <p>add some checks in <em>tracemunch</em> for undefined
-      variables.</p>
+      <p>improve <em>tracemunch</em>'s checking/reporting the type
+      for the first parameter, e.g., "WINDOW*" rather than
+      "#1".</p>
     </li>
 
     <li>
-      <p>modify <tt>TurnOn</tt>/<tt>TurnOff</tt> macros (in
-      lib_vidattr.c and lib_vid_attr.c) to avoid expansion of
-      &ldquo;<tt>CUR</tt>&rdquo; in trace.</p>
+      <p>modify <em>tracemunch</em> and the panel library to show
+      readable traces for panel- and user-pointers.</p>
     </li>
   </ul>
 
   examples:</p>
 
   <dl>
-    <dt><span class="part-name">color_content</span>
-    </dt>
-
-    <dd>Demonstrate the <tt>color_content</tt> and
-    <tt>extended_color_content</tt> functions.</dd>
-
-    <dt><span class="part-name">demo_tabs</span>
-    </dt>
-
-    <dd>A simple demo of tabs in curses.</dd>
-
-    <dt><span class="part-name">dump_window</span>
-    </dt>
-
-    <dd>A portable curses screen-dump, used to compare ncurses
-    screen contents with Solaris.</dd>
-
-    <dt><span class="part-name">pair_content</span>
+    <dt><span class="part-name"><em>back_ground</em></span>
     </dt>
 
-    <dd>Demonstrate the <tt>pair_content</tt> and
-    <tt>extended_pair_content</tt> functions.</dd>
+    <dd>to exercise the wide-character background functions.</dd>
 
-    <dt><span class="part-name">report_hashing</span>
+    <dt><span class="part-name"><em>move_field</em></span>
     </dt>
 
-    <dd>Check hash-tables used for terminfo and termcap names.</dd>
+    <dd>to demonstrate <a href=
+    "https://invisible-island.net/ncurses/man/form_field.3x.html">move_field</a>, and a stub
+    for a corresponding demo of <a href=
+    "https://invisible-island.net/ncurses/man/form_field_new.3x.html">dup_field</a>.</dd>
 
-    <dt><span class="part-name">parse_rgb</span>
+    <dt><span class="part-name"><em>test_tparm</em></span>
     </dt>
 
-    <dd>Sample implementation of the ncurses RGB extension from
-    <a href=
-    "https://invisible-island.net/ncurses/man/user_caps.5.html">user_caps.5</a>,
-    used in <em>picsmap</em> and <em>savescreen</em> programs.</dd>
+    <dd>for checking <em>tparm</em> changes.</dd>
   </dl>
 
-  <p>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.</p>
-
-  <ul>
-    <li>
-      <p>add &ldquo;<tt>-l</tt>&rdquo; option to test/background,
-      to dump screen contents in a form that lets different curses
-      implementations be compared.</p>
-    </li>
-
-    <li>
-      <p>add &ldquo;<tt>@</tt>&rdquo; command to test/ncurses
-      F-test, to allow rapid jump to different character pages.</p>
-    </li>
-
-    <li>
-      <p>added enum, regex examples to test/demo_forms</p>
-    </li>
-
-    <li>
-      <p>amend Scaled256() macro in test/picsmap.c to cover the
-      full range 0..1000</p>
-    </li>
-
-    <li>
-      <p>corrected pathname used in Ada95 sample programs for
-      <tt>explain.txt</tt>, 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.</p>
-    </li>
-
-    <li>
-      <p>ignore interrupted system-call in test/ncurses's
-      command-line, e.g., if the terminal were resized.</p>
-    </li>
-
-    <li>
-      <p>improved ifdef's for <tt>TABSIZE</tt> variable, to help
-      with AIX/HPUX ports.</p>
-    </li>
-  </ul>
-
   <h3><a name="h3-database" id="h3-database">Terminal database</a></h3>
 
   <p>There are several new terminal descriptions:</p>
 
   <blockquote style="word-break:keep-all">
-    <p><tt>alacritty</tt>, <tt>domterm</tt>, <tt>kitty</tt>,
-    <tt>mintty</tt>, <tt>mintty-direct</tt>, <tt>ms-terminal</tt>,
-    <tt>n7900</tt>, <tt>nsterm-build309</tt>,
-    <tt>nsterm-direct</tt>, <tt>screen5</tt>, <tt>ti703</tt>,
-    <tt>ti707</tt>, <tt>ti703-w</tt>, <tt>ti707-w</tt>
-    <tt>vscode</tt>, <tt>vscode-direct</tt>, <tt>xterm-mono</tt>,
-    <tt>xterm.js</tt></p>
+    <p><tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-absolute">absolute</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-att610_cvis">att610+cvis</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-foot">foot</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-foot-direct">foot-direct</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hp98550-color">hp98550-color</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hpterm-color2">hpterm-color2</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hterm">hterm</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hterm-256color">hterm-256color</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-linux-s">linux-s</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-putty_keypad">putty+keypad</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-putty_screen">putty+screen</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-putty-screen">putty-screen</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-screen.linux-s">screen.linux-s</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-scrt/securecrt">scrt/securecrt</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-tmux-direct">tmux-direct</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220_cvis">vt220+cvis</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220_cvis8">vt220+cvis8</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220_pcedit">vt220+pcedit</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220_vtedit">vt220+vtedit</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220-base">vt220-base</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt52_keypad">vt52+keypad</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_256color2">xterm+256color2</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_88color2">xterm+88color2</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-direct16">xterm-direct16</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-direct256">xterm-direct256</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_nofkeys">xterm+nofkeys</a></tt>,
+    and <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_nopcfkeys">xterm+nopcfkeys</a></tt>.</p>
   </blockquote>
 
   <p>There are many changes to existing terminal descriptions. Some
   were updates to several descriptions:</p>
 
   <ul>
-    <li>use <a href=
-    "/ncurses/terminfo.src.html#tic-ansi_rep"><tt>ansi+rep</tt></a>
-    in a dozen places</li>
-
-    <li>add rs1 to konsole, mlterm</li>
-
-    <li>improve several flash capabilities with trailing mandatory
-    delays</li>
+    <li>correct use-ordering in some <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-direct">xterm-direct</a>
+    flavors</li>
+
+    <li>fix some sgr inconsistencies in <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-d230c">d230c</a>, <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-ibm6153">ibm6153</a>,
+    <a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-ibm6154">ibm6154</a>,
+    <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-ncrvt100an">ncrvt100an</a></li>
 
-    <li>drop <tt>ich1</tt> from <tt>rxvt-basic</tt>, <tt>Eterm</tt>
-    and <tt>mlterm</tt> to improve compatibility with old
-    non-curses programs</li>
+    <li>improve <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt50h">vt50h</a> and <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt52">vt52</a> based on
+    DECScope manual</li>
 
-    <li>add/use <a href=
-    "/ncurses/terminfo.src.html#tic-xterm_keypad"><tt>xterm+keypad</tt></a>
-    in <tt>xterm-new</tt></li>
+    <li>use <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hp_arrows">hp+arrows</a> in a
+    few places</li>
 
     <li>use <a href=
-    "/ncurses/terminfo.src.html#tic-xterm_sl-twm"><tt>xterm+sl-twm</tt></a>
-    for consistency, nine places</li>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-hp_pfk-cr">hp+pfk-cr</a> in a
+    few places</li>
 
-    <li>improve <em>xm</em> example in <a href=
-    "/ncurses/terminfo.src.html#tic-xterm_x11mouse">xterm+x11mouse</a>
-    and <a href=
-    "/ncurses/terminfo.src.html#tic-xterm_sm_1006">xterm+sm_1006</a>.</li>
+    <li>use <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220_cvis">vt220+cvis</a> in
+    <tt>st</tt>, <tt>terminology</tt>, <tt>termite</tt> since they
+    ignore blinking-cursor detail in <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-att610_cvis">att610+cvis</a></li>
   </ul>
 
   <p>while others affected specific descriptions. These were
   retested, to take into account changes by their developers:</p>
 
   <blockquote>
-    <p><tt>terminator</tt>, <tt>st</tt></p>
+    <p><tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-kitty_common">kitty+common</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-mlterm3">mlterm3</a></tt>,
+    <tt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-ms-terminal">ms-terminal</a></tt></p>
   </blockquote>
 
   <p>while these are specific fixes based on reviewing
 
   <dl>
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-adds200">adds200</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-aaa_dec">aaa+dec</a>,
+    aaa+rv</dt>
 
-    <dd>
-      <ul>
-        <li>fix typo</li>
-      </ul>
-    </dd>
+    <dd>correct rmacs/smacs</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-gnome-256color">gnome-256color</a>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-aaa_rv">aaa+rv</a>
     </dt>
 
-    <dd>
-      <ul>
-        <li>base entry on "gnome", not "vte", for consistency</li>
-      </ul>
-    </dd>
+    <dd>correct sgr</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-interix">interix</a>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-icl6404">icl6404</a>
     </dt>
 
-    <dd>
-      <ul>
-        <li>trim unnecessary setf/setb</li>
-      </ul>
-    </dd>
+    <dd>correct csr</dd>
+
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-kitty">kitty</a>
+    </dt>
+
+    <dd>use att610+cvis, xterm+tmux and ansi+enq</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-linux-16color">linux-16color</a>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-konsole-base">konsole-base</a>
     </dt>
 
-    <dd>
-      <ul>
-        <li>accommodate <a href=
-        "https://lists.gnu.org/archive/html/bug-ncurses/2019-10/msg00061.html">
-        Linux console driver</a> incompatibility introduced in
-        early 2018</li>
-      </ul>
-    </dd>
+    <dd>re-enable "bel"</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-nsterm-256color">nsterm-256color</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-linux2.6">linux2.6</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>add nsterm-build309 to replace nsterm-256color,
-        assigning the latter as an alias of nsterm, to make mouse
-        work with nsterm-256color</li>
-      </ul>
-    </dd>
+    <dd>fix pound-sign mapping in acsc</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-regent40">regent40</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-linux3.0">linux3.0</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>renumber function-keys to match manual</li>
-      </ul>
-    </dd>
+    <dd>modify to reflect default mapping of shift-tab by kbd
+    1.14</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-regent60">regent60</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-pccons">pccons</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>add cd (clr_eos)</li>
+    <dd>fill in some missing pieces, to make it comparable to the
+    vt220 entry</dd>
 
-        <li>corrected acsc</li>
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-putty">putty</a>
+    </dt>
 
-        <li>add shifted function-keys</li>
-      </ul>
-    </dd>
+    <dd>use vt100+fnkeys, add rep</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-tvi950">tvi950</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-screen">screen</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>added function-key definitions to agree with Televideo
-        950 manual</li>
+    <dd>use vt100+enq</dd>
 
-        <li>corrected acsc</li>
+    <dt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-terminator">terminator</a>
+    </dt>
 
-        <li>remove bogus kf0</li>
+    <dd>corrected tsl capability</dd>
 
-        <li>add bel</li>
-      </ul>
-    </dd>
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-ti916">ti916</a>
+    </dt>
 
-    <dt><a href=
-    "/ncurses/terminfo.src.html#tic-tvi955">tvi955</a>:</dt>
+    <dd>correct cup</dd>
 
-    <dd>
-      <ul>
-        <li>fix typo</li>
-      </ul>
-    </dd>
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-tmux">tmux</a>
+    </dt>
 
-    <dt><a href=
-    "/ncurses/terminfo.src.html#tic-vi200">vi200</a>:</dt>
+    <dd>change kbs to ^?</dd>
 
-    <dd>
-      <ul>
-        <li>add acsc string, including right/down-arrow</li>
-      </ul>
-    </dd>
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-vt220">vt220</a>
+    </dt>
+
+    <dd>use vt220+cvis</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-wy50">wy50</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-vt420_lrmm">vt420+lrmm</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>corrected acsc</li>
-      </ul>
-    </dd>
+    <dd>add smglp and smgrp</dd>
+
+    <dt><a href="https://invisible-island.net/ncurses/terminfo.src.html#tic-vt420">vt420</a>
+    </dt>
 
-    <dt><a href="/ncurses/terminfo.src.html#tic-wy50">wy50</a> and
-    <a href="/ncurses/terminfo.src.html#tic-wy60">wy60</a>:</dt>
+    <dd>use vt420+lrmm</dd>
 
-    <dd>
-      <ul>
-        <li>add shifted function-keys as kF1 to kF16</li>
-      </ul>
-    </dd>
+    <dt><a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-new">xterm-new</a>
+    </dt>
+
+    <dd>add nel</dd>
 
     <dt><a href=
-    "/ncurses/terminfo.src.html#tic-xterm_x11hilite">xterm+x11hilite</a>:</dt>
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm-vt52">xterm-vt52</a>
+    </dt>
 
-    <dd>
-      <ul>
-        <li>eliminate unused <em>p5</em> parameter.</li>
-      </ul>
-    </dd>
+    <dd>use vt52+keypad</dd>
   </dl>
 
   <p>A few entries use extensions (user-defined terminal
   capabilities):</p>
 
   <ul>
-    <li>use <a href=
-    "/ncurses/terminfo.src.html#tic-xterm_sm_1006"><tt>xterm+sm+1006</tt></a>
-    (aka &ldquo;SGR 1006 mouse&rdquo;) for konsole-base and
-    putty</li>
+    <li>add shifted Linux console keys in <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-linux_sfkeys">linux+sfkeys</a>
+    entry for <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-screen.linux">screen.linux</a></li>
 
-    <li>add <em><tt>Smol/Rmol</tt></em> user-defined capability to
-    <tt>tmux</tt> and <tt>vte-2018</tt></li>
+    <li>add Smulx to <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-alacritty">alacritty</a></li>
 
-    <li>add <em><tt>Smulx</tt></em> user-defined capability to
-    <tt>tmux</tt>, <tt>vte-2018</tt></li>
+    <li>add kbeg to <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_keypad">xterm+keypad</a>
+    to accommodate termcap applications</li>
+
+    <li>add extensions in <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-xterm_tmux">xterm+tmux</a>
+    and <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-ecma_strikeout">ecma+strikeout</a>
+    to <a href=
+    "https://invisible-island.net/ncurses/terminfo.src.html#tic-ms-terminal">ms-terminal</a>,
+    but cancel the non-working Cr and Ms capabilities</li>
   </ul>
 
   <h3><a name="h3-documentation" id=
 
     <li>
       <p>fills in overlooked descriptions of features which were
-      described in the <a href=
-      "https://invisible-island.net/ncurses/NEWS.html">NEWS</a>
-      file but treated sketchily in manual pages.</p>
+      described in the <a href="https://invisible-island.net/ncurses/NEWS.html">NEWS</a> file
+      but treated sketchily in manual pages.</p>
     </li>
   </ul>
 
       <p>Corrections:</p>
 
       <ul>
-        <li>correct error-returns listed in manual pages for a few
-        form functions</li>
-
-        <li>corrected prototypes in several manpages using script
-        to extract those in compilable form.</li>
+        <li>
+          <p>make <em>opts</em> extension for <a href=
+          "https://invisible-island.net/ncurses/man/curs_getcchar.3x.html#h3-getcchar"><tt>getcchar</tt></a>
+          work as documented for <a href=
+          "https://invisible-island.net/ncurses/announce-6.1.htmll#h4-new-library">ncurses
+          6.1</a>, adding &ldquo;<tt>-g</tt>&rdquo; flag to
+          <em>demo_new_pair</em> to illustrate.</p>
+        </li>
 
-        <li>fix typo in <a href=
-        "https://invisible-island.net/ncurses/man/term.5.html#h3-EXTENDED-NUMBER-FORMAT">
-        term.5</a>, improve explanation of format</li>
+        <li>
+          <p>modify <a href="https://invisible-island.net/ncurses/man/tset.1.html">tset</a>
+          &ldquo;-q&rdquo; option to refrain from modifying
+          terminal modes, to match the documentation.</p>
+        </li>
       </ul>
     </li>
 
-    <li>
-      <p>Clarify in manual pages that <a href=
-      "https://invisible-island.net/ncurses/man/curs_printw.3x.html#h2-PORTABILITY">
-      vwprintw</a> and <a href=
-      "https://invisible-island.net/ncurses/man/curs_scanw.3x.html#h2-PORTABILITY">
-      vwscanw</a> are obsolete.<br>
-      They have not been part of X/Open Curses since 2007.</p>
-    </li>
-
     <li>
       <p>New/improved history and portability sections:</p>
 
       <ul>
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_addch.3x.html#h3-ACS-Symbols">
-        curs_addch.3x</a> gives some background for ACS
-        symbols.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_getcchar.3x.html#h2-PORTABILITY">
-        curs_getcchar.3x</a> explains a difference between ncurses
-        and X/Open Curses.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_getstr.3x.html#h2-PORTABILITY">
-        curs_getstr.3x</a> gives historical/portability background
-        for the length parameter of <tt>wgetnstr</tt>.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_slk.3x.html">
-        curs_slk.3x</a> lists a few differences between SVr4 curses
-        and X/Open Curses for soft-keys.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_terminfo.3x.html">
-        curs_terminfo.3x</a> explains that the initial
-        implementation of terminfo in SVr2 was mostly replaced by
-        other developers in SVr3.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/infocmp.1m.html">infocmp.1</a>
-        explains that the initial version of terminfo had no tool
-        for decompiling descriptions. That came later, with SVr3,
-        with a different developer.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/tabs.1.html">tabs.1</a>
-        tells more than you wanted to know about the tool.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/tic.1m.html">tic.1</a>
-        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.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/toe.1m.html">toe.1</a>
-        explains the origin of this tool.</li>
-      </ul>
-    </li>
+        <li>
+          <p>improve documentation for <a href=
+          "https://invisible-island.net/ncurses/man/terminfo.5.html#h3-Parameterized-Strings">
+          tparm</a> and static/dynamic variables.</p>
+        </li>
 
-    <li>
-      <p>Improvements for <a href=
-      "https://invisible-island.net/ncurses/man/user_caps.5.html">user_caps.5</a>:</p>
+        <li>
+          <p>add history note to <a href=
+          "https://invisible-island.net/ncurses/man/curs_scanw.3x.html#h2-HISTORY">curs_scanw.3x</a>
+          for &lt;stdarg.h&gt; and &lt;varargs.h&gt;</p>
+        </li>
 
-      <ul>
-        <li>mention <tt>meml</tt>, <tt>memu</tt> and
-        <tt>box1</tt></li>
+        <li>
+          <p>add history note to <a href=
+          "https://invisible-island.net/ncurses/man/curs_printw.3x.html#h2-HISTORY">curs_printw.3x</a>
+          for &lt;stdarg.h&gt; and &lt;varargs.h&gt;</p>
+        </li>
 
-        <li>expanded description of <tt>XM</tt></li>
+        <li>
+          <p>add portability note to <a href=
+          "https://invisible-island.net/ncurses/man/ncurses.3x.html#h3-Header-files">ncurses.3x</a>
+          regarding &lt;stdarg.h&gt;</p>
+        </li>
 
-        <li>add a clarification regarding the <tt>RGB</tt>
-        capability.</li>
+        <li>
+          <p>add historical notes to <a href=
+          "https://invisible-island.net/ncurses/man/tput.1.html#h2-HISTORY">tput</a>,
+          <a href="https://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h2-HISTORY">
+          curses-terminfo</a> and <a href=
+          "https://invisible-island.net/ncurses/man/curs_color.3x.html#h2-HISTORY">curses-color</a>
+          manpages based on source-code for SVr2, SVr3 and
+          SVr4.</p>
+        </li>
 
-        <li>mention user_caps.5 in the tic and infocmp manual
-        pages.</li>
+        <li>
+          <p>improve history section for <a href=
+          "https://invisible-island.net/ncurses/man/tset.1.html#h2-HISTORY">tset</a> manpage
+          based on the 1BSD tarball, which preceded BSD's SCCS
+          checkins by more than three years.</p>
+        </li>
       </ul>
     </li>
 
       <p>Other improvements:</p>
 
       <ul>
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_add_wch.3x.html#h3-Line-Graphics">
-        curs_add_wch.3x</a> adds note about Unicode terminology for
-        the line-drawing characters.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_color.3x.html#h2-RETURN-VALUE">
-        curs_color.3x</a> improves discussion of error returns and
-        extensions.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_mouse.3x.html">
-        curs_mouse.3x</a> explains how the <tt>kmous</tt> and
-        <tt>XM</tt> capabilities are used for xterm-mouse
-        input.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_refresh.3x.html#h3-wnoutrefresh_doupdate">
-        curs_refresh.3x</a> improves documentation regarding the
-        virtual and physical screens.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_util.3x.html">
-        curs_util.3x</a> mentions a difference between SVr4 and
-        X/Open Curses for <tt>unctrl.h</tt></li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/curs_variables.3x.html#h2-PORTABILITY">
-        curs_variables.3x</a> improves description of the
-        <em>init_tabs</em> capability and <tt>TABSIZE</tt>
-        variable.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/ncurses.3x.html#h2-ALTERNATE-CONFIGURATIONS">
-        ncurses.3x</a> improves documentation regarding
-        feature-test macros in curses.h</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/resizeterm.3x.html#h3-resize_term">
-        resizeterm.3x</a> about top-level windows which touch the
-        screen's borders.</li>
-
-        <li><a href=
-        "https://invisible-island.net/ncurses/man/tput.1.html#h3-Terminal-Size">
-        tput.1</a> clarifies how <em>tput</em> determines the
-        terminal size.</li>
+        <li>
+          <p>explain in <a href=
+          "https://invisible-island.net/ncurses/man/ncurses.3x.html#h2-ALTERNATE-CONFIGURATIONS">
+          ncurses.3x</a> that functions in the tinfo library do not
+          rely upon wide-characters.</p>
+        </li>
+
+        <li>
+          <p>improve manual page for <a href=
+          "https://invisible-island.net/ncurses/man/panel.3x.html#h2-PORTABILITY">panel</a>
+          library, extending the portability section as well as
+          documenting error-returns.</p>
+        </li>
+
+        <li>
+          <p>add section on margins to <a href=
+          "https://invisible-island.net/ncurses/man/terminfo.5.html#h3-Margins">terminfo.5</a>,
+          adapted from X/Open Curses.</p>
+        </li>
+
+        <li>
+          <p>improve <a href=
+          "https://invisible-island.net/ncurses/man/term.5.html#h3-LEGACY-STORAGE-FORMAT">man/term.5</a>
+          section on legacy storage format.</p>
+        </li>
+
+        <li>
+          <p>add a note in <a href=
+          "https://invisible-island.net/ncurses/man/terminfo.5.html#h3-Predefined-Capabilities">
+          terminfo.5</a> explaining that no-parameter strings such
+          as <em><tt>sgr0</tt></em> or <em><tt>cnorm</tt></em>
+          should not be used with tparm.</p>
+        </li>
+
+        <li>
+          <p>improve description of BSD-style padding in <a href=
+          "https://invisible-island.net/ncurses/man/curs_termcap.3x.html#h2-BUGS">curs_termcap.3x</a></p>
+        </li>
+
+        <li>
+          <p>improve discussion of padding versus <tt>tparm</tt>
+          and <tt>tputs</tt> in <a href=
+          "https://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Formatting-Output">
+          man/curs_terminfo.3x</a></p>
+        </li>
+
+        <li>
+          <p>add a note in manual page to explain <a href=
+          "https://invisible-island.net/ncurses/man/curs_getch.3x.html#h3-Ungetting-characters">
+          ungetch</a> vs <a href=
+          "https://invisible-island.net/ncurses/man/curs_get_wch.3x.html#h3-unget_wch">unget_wch</a>.</p>
+        </li>
+
+        <li>
+          <p>improve description of error-returns in <a href=
+          "https://invisible-island.net/ncurses/man/curs_addch.3x.html#h2-RETURN-VALUE">waddch</a>
+          and <a href=
+          "https://invisible-island.net/ncurses/man/curs_addstr.3x.html#h2-RETURN-VALUE">waddnstr</a>
+          manual pages.</p>
+        </li>
       </ul>
     </li>
   </ul>
   are to existing pages).</p>
 
   <p>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.</p>
+  the information is presented. For instance, hyphenation is
+  suppressed in the HTML files generated from manual pages because
+  an upgrade to <em>groff</em> gave noticeably poorer results,
+  interfering with the process of creating links between the
+  resulting webpages.</p>
 
   <h3><a name="h3-bug-fixes" id="h3-bug-fixes">Interesting
   bug-fixes</a></h3>
 
   <p>While there were many bugs fixed during development of ncurses
-  6.2, only a few (the reason for this release) were both important
+  6.3, 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.</p>
+  are detailed in the <a href=
+  "https://invisible-island.net/ncurses/NEWS.html#t20211018">NEWS</a> file no elaboration is
+  needed here.</p>
 
-  <p>The interesting bugs were in tic/infocmp's handling of
-  user-defined capabilities. These were not recent bugs. Initially
-  it was a simple problem:</p>
+  <p>The interesting bugs were:</p>
 
   <ul>
-    <li>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&mdash;unless some special support for
-    a particular multi-typed name is built into ncurses.</li>
-
     <li>
-      <p>One of simpleterm's contributors copied some definitions
-      for using <em>tmux</em>'s user-defined capabilities in
+      <p>modify <a href=
+      "https://invisible-island.net/ncurses/man/curs_bkgd.3x.html#h3-bkgd">wbkgd</a> and
       <a href=
-      "https://git.suckless.org/st/commit/06f8cf8ca87a81db15816658c40b2afcd1ad5332.html">
-      late in 2016</a>.</p>
+      "https://invisible-island.net/ncurses/man/curs_bkgrnd.3x.html#h3-bkgrnd">wbkgrnd</a> 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.</p>
 
-      <blockquote>
-        <pre class="demo-name">
-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,
-</pre>
-      </blockquote>
-    </li>
-
-    <li>
-      <p>Later, in (referring to a version from <a href=
-      "https://git.suckless.org/st/commit/c0882f2ed1d7a2dd0fa2efa52157e6fc6fde3652.html">
-      mid-2017</a>), a user asked to have it updated in
-      ncurses.</p>
+      <p>This was a regression introduced in ncurses 6.2 (<a href=
+      "https://lists.gnu.org/archive/html/bug-ncurses/2020-03/msg00000.html">reported</a>
+      on the mailing list), for which the workaround was to specify
+      a blank for the background character.</p>
     </li>
 
     <li>
-      <p>However, it had an error from the change in late 2016. The
-      terminal description made what <em>tmux</em> expected to be
-      <strong>string</strong> actually a
-      <strong>boolean</strong>.</p>
-
-      <p>Over the years, there were problems with each of
-      simpleterm's terminal descriptions. I repaired those, and
-      usually dealt with the problem.</p>
-    </li>
-
-    <li>
-      <p>The difference in this case was that when compiling the
-      terminal database, <em>tic</em> may have in memory the
-      definitions for more than one terminal description (so that
-      it can resolve &ldquo;<tt>use=</tt>&rdquo; clauses). Seeing
-      two different types for the same name, in certain situations
-      it would incorrectly merge the symbol tables for the two
-      terminal descriptions.</p>
-    </li>
-
-    <li>
-      <p>On simpleterm's side, their bug was finally fixed in
+      <p>remove output-related checks for <a href=
+      "https://invisible-island.net/ncurses/man/curs_outopts.3x.html">nl/nonl</a> (also
       <a href=
-      "https://git.suckless.org/st/commit/83866428de031300eab03fbb116bcf7d2b1d4f60.html">
-      late 2019</a>, three years after the bug was created.</p>
-    </li>
-  </ul>
-
-  <p>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 <a href=
-  "https://github.com/tmux/tmux/issues/1264">tmux #1264</a>), and
-  the terminal description was updated that week (ncurses patch
-  <a href=
-  "https://invisible-island.net/ncurses/NEWS.html#t20180224">20180224</a>):</p>
-
-  <blockquote>
-    <pre class="demo-name">
-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
-</pre>
-  </blockquote>
-
-  <p>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:</p>
-
-  <ul>
-    <li>
-      <p>Was there a reliable way to manage terminal descriptions
-      which used the same extended name in different ways?</p>
+      "https://lists.gnu.org/archive/html/bug-ncurses/2020-09/msg00018.html">
+      reported</a> on the mailing list).</p>
     </li>
 
     <li>
-      <p>Should ncurses provide a registry of well-known extended
-      names, with their types?</p>
-    </li>
-  </ul>
-
-  <p>Since the correction to <a href=
-  "https://invisible-island.net/ncurses/ncurses.html#download_database">
-  <tt>terminfo.src</tt></a> 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.</p>
+      <p>improve tparm implementation of <tt>%P</tt> and
+      <tt>%g</tt>, more closely matching SVr4 terminfo. Those
+      denote <em>static</em> and <em>dynamic</em> variables in
+      terminfo expressions.</p>
 
-  <p>Nothing more (constructive) was mentioned with regard to
-  simpleterm. But a few problems were found in the handling of
-  user-defined capabilities:</p>
-
-  <ul>
-    <li>
-      <p>Forward-references to user-defined capabilities in a
-      &ldquo;<tt>use=</tt>&rdquo; clause did not allocate new data
-      for each use. In <em>tic</em>, successive compilation of
-      terminal entries could add user-defined capabilities to the
-      wrong terminal entry.</p>
-
-      <p>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.</p>
-    </li>
-
-    <li>
-      <p>There is one (documented) case where ncurses 6.1 supports
-      a user-defined capability that could be any type (i.e.,
-      &ldquo;RGB&rdquo;). The check added in February 2018 to guard
-      against mismatches did not handle all of the combinations
-      needed.</p>
+      <p>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 <a href=
+      "https://invisible-island.net/ncurses/ncurses-openbsd.html#issue_tput">tset</a>.</p>
     </li>
   </ul>
 
-  <p>Both of these issues dated from the original implementation of
-  user-defined capabilities. Fixing them does not change the
-  terminal database, but a older <em>tic</em> 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.</p>
-
-  <p>The &ldquo;<tt>-c</tt>&rdquo; (check) option of <em>tic</em>
-  is not very useful if it cannot offer advice on parameters needed
-  for user-defined capabilities. The various <em>Caps</em> files
-  were reorganized to reduce redundancy, and in the common portion
-  (<a href=
-  "https://github.com/ThomasDickey/ncurses-snapshots/blob/master/include/Caps-ncurses">Caps-ncurses</a>),
-  a registry of user-defined capabilities is provided for use by
-  <em>tic</em>. While users can still define their own custom
-  capabilities, <em>tic</em> will not offer any advice when their
-  parameters do not match.</p>
-
-  <p>In ncurses 6.2, <em>tic</em> makes a special check to allow
-  any type for <em>RGB</em>, but its being able to do this relies
-  upon fixes made in the ncurses library in mid-2019.</p>
-
   <h3><a name="h3-config-config" id=
   "h3-config-config">Configuration changes</a></h3>
 
@@ -1362,52 +1002,73 @@ diff --git a/st.info b/st.info
   <p>There are a few new/modified configure options:</p>
 
   <dl>
-    <dt><tt>--with-config-suffix</tt>
+    <dt><tt>--enable-fvisibility</tt>
     </dt>
 
     <dd>
-      <p>helps work around a filename conflict with Debian packages
-      versus test-packages.</p>
+      <p>new configure option and check for <em>gcc</em>
+      <tt>-fvisibility=hidden</tt> feature</p>
     </dd>
 
-    <dt><tt>--with-ada-libname</tt>
+    <dt><tt>--enable-leaks</tt>
     </dt>
 
     <dd>
-      <p>allows one to rename the &ldquo;AdaCurses&rdquo; library
-      (at least one packager prefers a lowercase name).</p>
+      <p>corrected to allow turning leak-checking off later in a
+      set of options.</p>
     </dd>
 
-    <dt><tt>--with-fallbacks</tt>
+    <dt><tt>--enable-stdnoreturn</tt>
     </dt>
 
     <dd>
-      <p>now ensures there is a value, and adds the fallback
-      information to top-level Makefile summary.</p>
+      <p>new configure option makes the <code>_Noreturn</code>
+      keyword optional to ease transition.</p>
     </dd>
 
-    <dt><tt>--with-pcre2</tt>
+    <dt><tt>--disable-pkg-ldflags</tt>
     </dt>
 
     <dd>
-      <p>check for pcre-posix library to help with MinGW port.</p>
+      <p>revised option also controls whether <code>$LDFLAGS</code>
+      from the build is provided in &ldquo;<tt>-config</tt>&rdquo;
+      and &ldquo;<tt>.pc</tt>&rdquo; files.</p>
     </dd>
 
-    <dt><tt>--with-tic-path</tt> and<br></dt>
+    <dt><tt>--disable-root-access</tt>
+    </dt>
+
+    <dd>
+      <p>add configure option which tells ncurses to disallow most
+      file-opens by setuid processes.</p>
+    </dd>
+
+    <dt><tt>--disable-wattr-macros</tt>
+    </dt>
+
+    <dd>
+      <p>changed default to help packagers who reuse wide ncursesw
+      header file with non-wide ncurses library.</p>
+    </dd>
 
-    <dt><tt>--with-infocmp-path</tt>
+    <dt><tt>--with-pkg-config-libdir</tt>
     </dt>
 
     <dd>
-      <p>help work around problems building fallback source using
-      pre-6.0 tic/infocmp.</p>
+      <p>revised option uses the actual search path from
+      <em>pkg-config</em> or <em>pkgconf</em> using the output from
+      <tt>--debug</tt>.</p>
     </dd>
 
-    <dt><tt>--with-versioned-syms</tt>
+    <dt><tt>--with-ada-libname</tt><br>
+    <tt>--with-form-libname</tt><br>
+    <tt>--with-menu-libname</tt><br>
+    <tt>--with-panel-libname</tt>
     </dt>
 
     <dd>
-      <p>option value can now be a relative pathname.</p>
+      <p>new several <tt>--with-<em>xxx</em>-libname</tt> options,
+      to help with pkgsrc</p>
     </dd>
   </dl>
 
@@ -1418,148 +1079,107 @@ diff --git a/st.info b/st.info
 
   <ul>
     <li>
-      <p>ignore <a href=
-      "/ncurses/man/ncurses.3x.html#h3-TERMINFO"><tt>$TERMINFO</tt></a>
-      as a default value in configure script if it came from the
-      <tt>infocmp</tt> <strong><tt>-Q</tt></strong> option.</p>
+      <p>add a special case in the configure script to work around
+      one of the build-time breakages reported for <a href=
+      "https://invisible-island.net/ncurses/ncurses-openbsd.html">OpenBSD 6</a> here:</p>
+
+      <blockquote>
+        <p><a href=
+        "https://www.mail-archive.com/bugs@openbsd.org/msg13200.html">
+        https://www.mail-archive.com/bugs@openbsd.org/msg13200.html</a></p>
+      </blockquote>
     </li>
 
     <li>
-      <p>distinguish gcc from icc and clang when the
-      <tt>--enable-warnings</tt> option is not used, to avoid
-      unnecessary warnings about unrecognized inline options</p>
+      <p>modify configure check for <em>libtool</em> to prevent
+      accidental use of an OpenBSD program which uses the same
+      name.</p>
     </li>
 
     <li>
-      <p>consistently prepend new libraries as they are found
-      during configuration, rather than relying upon the linker to
-      resolve order dependencies of libraries.</p>
+      <p>modify configuration checks for build-time tic/infocmp to
+      use <em>AC_CHECK_TOOL</em>. That can still be overridden by
+      <tt>--with-tic-path</tt> and <tt>--with-infocmp-path</tt>
+      when fallbacks are used, but even if not using fallbacks, the
+      improved check may help with cross-compiling.</p>
     </li>
 
     <li>
-      <p>modified configure scripts to reduce relinking/ranlib
-      during library install :</p>
-
-      <ul>
-        <li>use &ldquo;<tt>install -p</tt>&rdquo; when available,
-        to avoid need for ranlib of static libraries.</li>
-
-        <li>scripts which use
-        &ldquo;<tt>--disable-relink</tt>;&rdquo; add a 1-second
-        sleep to work around tools which use whole-second
-        timestamps, e.g., in <tt>utime</tt> rather than the actual
-        file system resolution.</li>
-      </ul>
+      <p>relax modification-time comparison in
+      <em>CF_LINK_FUNCS</em> to allow it to accept link() function
+      with NFS filesystems which change the mtime on the link
+      target, e.g., several BSD systems.</p>
     </li>
 
     <li>
-      <p id="getenv-check">add configure check for <a href=
-      "#getenv-fixes"><tt>getenv</tt></a> to work around
-      implementation shown in Emscripten which overwrites the
-      previous return value on each call.</p>
-
-      <p>Use that to optionally suppress <tt>START_TRACE</tt>
-      macro, whose call to <tt>getenv</tt> may not work
-      properly</p>
+      <p>modify configure check for c89/c99 aliases of
+      <em>clang</em> to use its <tt>-std</tt> option instead,
+      because some platforms, in particular macOS, do not provide
+      workable c89/c99 aliases.</p>
     </li>
 
     <li>
-      <p>change target configure level for <tt>_XOPEN_SOURCE</tt>
-      to 600 to address use of <tt>vsscanf</tt> and
-      <tt>setenv</tt>.</p>
+      <p>modify <em>CF_NCURSES_CONFIG</em> to work around
+      <em>Xcode</em>'s c99 "-W" option, which conflicts with
+      conventional use for passing linker options.</p>
     </li>
 
     <li>
-      <p>reduce use of <tt>_GNU_SOURCE</tt> for current glibc where
-      <tt>_DEFAULT_SOURCE</tt> combines with
-      <tt>_XOPEN_SOURCE</tt></p>
+      <p>modify configure scripts to filter out redefinitions of
+      _XOPEN_SOURCE, e.g., for NetBSD which generally supports 500,
+      but 600 is needed for ncursesw.</p>
+    </li>
+  </ul>
 
-      <p>Allow for Cygwin's newlib when checking for the
-      _DEFAULT_SOURCE symbol.</p>
+  <p>Here are some of the other portability fixes:</p>
 
-      <p>MidnightBSD is now checked for the
-      <tt>_XOPEN_SOURCE</tt>-related definitions.</p>
+  <ul>
+    <li>
+      <p>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.</p>
     </li>
 
     <li>
-      <p>If the check for <tt>va_copy</tt> or <tt>__va_copy</tt>
-      fails,</p>
-
-      <ul>
-        <li>configure now tries copying the pointers for
-        <tt>va_list</tt>, or as an array.</li>
-
-        <li>alternatively, it checks for
-        <tt>__builtin_va_copy</tt>(), which could be used with AIX
-        <tt>xlc</tt> in <em>c89</em> mode.</li>
-      </ul>
+      <p>modify mk-1st.awk to account for extra-suffix configure
+      option.</p>
     </li>
 
     <li>
-      <p>several changes to support a port to Ultrix 3.1:</p>
-
-      <ul>
-        <li>check if "b" binary feature of fopen works</li>
-
-        <li>check for missing feature of locale.h</li>
-
-        <li>add fallback for strstr() in test-programs</li>
-
-        <li>add fallback for STDOUT_FILENO in test-programs</li>
-      </ul>
+      <p>build-fix for termsort module when configured with
+      termcap.</p>
     </li>
 
     <li>
-      <p>The <em>test/configure</em> script (used for <a href=
-      "/ncurses/ncurses-examples.html"><em>ncurses-examples</em></a>)
-      is improved:</p>
-
-      <ul>
-        <li>work around non-ncurses termcap.h file, e.g., in
-        Slackware.</li>
-
-        <li>check for <a href=
-        "/ncurses/man/curs_variables.3x.html#h3-TABSIZE"><tt>TABSIZE</tt></a>
-        variable.</li>
-
-        <li>checks for the X11/Intrinsic.h header, accommodate
-        recent MacOS changes which largely emptied
-        <tt>/usr/include</tt>.</li>
-      </ul>
+      <p>modify configure script and makefiles to support ".PHONY"
+      make program feature.</p>
     </li>
-  </ul>
 
-  <p>Here are some of the other portability fixes:</p>
-
-  <ul>
     <li>
-      <p>added dummy "check" rule in top-level and test-Makefile to
-      simplify building test-packages for ArchLinux.</p>
+      <p>amend <em>libtool</em> configuration to add dependency for
+      install.tic, etc., in ncurses/Makefile on the lower-level
+      libraries.</p>
     </li>
 
     <li>
-      <p>dropped library-dependency on psapi for MinGW port, since
-      win_driver.c defines <tt>PSAPI_VERSION</tt> to 2, making it
-      use <tt>GetProcessImageFileName</tt> from kernel32.dll</p>
+      <p>modify Ada95 source-generation utility to write to a file
+      given as parameter rather than to the standard output,
+      allowing builds with MinGW.</p>
     </li>
 
     <li>
-      <p>made build-fixes for configuration using --program-suffix
-      with Ada95, noticed with MacOS but applicable to other
-      platforms without libpanelw, etc.</p>
+      <p>amend tic/infocmp check to allow for the respective tool's
+      absence.</p>
     </li>
 
     <li>
-      <p>modified ncurses/Makefile.in to fix a case where
-      Debian/testing changes to the ld --as-needed configuration
-      broke ncurses-examples test packages.</p>
+      <p>build-fixes for gnat 10.1.1, whose gnatmake drops
+      integration with gprbuild.</p>
     </li>
 
     <li>
-      <p>used <tt>_WIN32</tt>/<tt>_WIN64</tt> in preference to
-      <tt>__MINGW32__</tt>/<tt>__MINGW64__</tt> symbols to simplify
-      building with Microsoft Visual C++, since the former are
-      defined in both compiler configurations.</p>
+      <p>correct configure version-check/warning for g++ to allow
+      for 10.x</p>
     </li>
   </ul>
 
@@ -1635,7 +1255,7 @@ diff --git a/st.info b/st.info
       <p>The <span class="main-name">ncurses</span> utilities have
       options to allow you to filter terminfo entries for use with
       less capable <em>curses</em>/<em>terminfo</em> versions such
-      as the HP/UX and AIX ports.</p>
+      as the HP-UX and AIX ports.</p>
     </li>
   </ul>
 
@@ -1646,10 +1266,10 @@ diff --git a/st.info b/st.info
     <li>
       <p>The API is 8-bit clean and base-level conformant with the
       X/OPEN curses specification, XSI curses (that is, it
-      implements all BASE level features, and most EXTENDED
-      features). It includes many function calls not supported
-      under SVr4 curses (but portability of all calls is documented
-      so you can use the SVr4 subset only).</p>
+      implements all <em>BASE</em> level features, and most
+      <em>EXTENDED</em> features). It includes many function calls
+      not supported under SVr4 curses (but portability of all calls
+      is documented so you can use the SVr4 subset only).</p>
     </li>
 
     <li>
@@ -1691,6 +1311,11 @@ diff --git a/st.info b/st.info
       than one control sequence to map to a given key code.</p>
     </li>
 
+    <li>
+      <p>Support for direct-color terminals, such as modern
+      xterm.</p>
+    </li>
+
     <li>
       <p>Support for 256-color terminals, such as modern xterm.</p>
     </li>
@@ -1735,19 +1360,18 @@ diff --git a/st.info b/st.info
     </li>
 
     <li>
-      <p>The <a href=
-      "https://invisible-island.net/ncurses/man/tic.1m.html"><span class="part-name">
-      tic</span></a>/<a href=
-      "https://invisible-island.net/ncurses/man/captoinfo.1m.html">captoinfo</a>
-      utility provided with <span class="main-name">ncurses</span>
-      has the ability to translate many termcaps from the XENIX,
-      IBM and AT&amp;T extension sets.</p>
+      <p>The <a href="https://invisible-island.net/ncurses/man/tic.1m.html"><span class=
+      "part-name">tic</span></a>/<a href=
+      "https://invisible-island.net/ncurses/man/captoinfo.1m.html">captoinfo</a> utility
+      provided with <span class="main-name">ncurses</span> has the
+      ability to translate many termcaps from the XENIX, IBM and
+      AT&amp;T extension sets.</p>
     </li>
 
     <li>
       <p>A BSD-like <a href=
-      "https://invisible-island.net/ncurses/man/tset.1.html"><span class="part-name">
-      tset</span></a> utility is provided.</p>
+      "https://invisible-island.net/ncurses/man/tset.1.html"><span class=
+      "part-name">tset</span></a> utility is provided.</p>
     </li>
 
     <li>
@@ -1776,24 +1400,25 @@ diff --git a/st.info b/st.info
 
     <li>
       <p>The table-of-entries utility <a href=
-      "https://invisible-island.net/ncurses/man/toe.1m.html"><span class="part-name">
-      toe</span></a> makes it easy for users to see exactly what
-      terminal types are available on the system.</p>
+      "https://invisible-island.net/ncurses/man/toe.1m.html"><span class=
+      "part-name">toe</span></a> makes it easy for users to see
+      exactly what terminal types are available on the system.</p>
     </li>
 
     <li>
       <p>The library meets the XSI requirement that every macro
-      entry point have a corresponding function which may be linked
+      entry point has a corresponding function which may be linked
       (and will be prototype-checked) if the macro definition is
       disabled with <code>#undef</code>.</p>
     </li>
 
     <li>
       <p>Extensive documentation is provided (see the <em><a href=
-      "https://invisible-island.net/ncurses/ncurses.faq.html#additional_reading">
-      Additional Reading</a></em> section of the <em><a href=
-      "https://invisible-island.net/ncurses/ncurses.faq.html"><span class="main-name">
-      ncurses</span> FAQ</a></em> for online documentation).</p>
+      "https://invisible-island.net/ncurses/ncurses.faq.html#additional_reading">Additional
+      Reading</a></em> section of the <em><a href=
+      "https://invisible-island.net/ncurses/ncurses.faq.html"><span class=
+      "main-name">ncurses</span> FAQ</a></em> for online
+      documentation).</p>
     </li>
   </ul>
 
@@ -1826,9 +1451,7 @@ diff --git a/st.info b/st.info
       <dd>
         <p>Curses Development Kit</p>
 
-        <p><a href=
-        "https://invisible-island.net/cdk/">https://invisible-island.net/cdk/</a><br>
-
+        <p><a href="https://invisible-island.net/cdk/">https://invisible-island.net/cdk/</a><br>
         </p>
       </dd>
 
@@ -1838,8 +1461,7 @@ diff --git a/st.info b/st.info
       <dd>
         <p>directory-editor</p>
 
-        <p><a href=
-        "https://invisible-island.net/ded/">https://invisible-island.net/ded/</a></p>
+        <p><a href="https://invisible-island.net/ded/">https://invisible-island.net/ded/</a></p>
       </dd>
 
       <dt><span class="part-name">dialog</span>
@@ -1850,8 +1472,7 @@ diff --git a/st.info b/st.info
         and the basis for similar install/configure applications on
         many systems.</p>
 
-        <p><a href=
-        "https://invisible-island.net/dialog/">https://invisible-island.net/dialog/</a></p>
+        <p><a href="https://invisible-island.net/dialog/">https://invisible-island.net/dialog/</a></p>
       </dd>
 
       <dt><span class="part-name">lynx</span>
@@ -1947,8 +1568,7 @@ diff --git a/st.info b/st.info
       <dd>
         <p>a replacement for <code>ssh</code>.</p>
 
-        <p><a href=
-        "https://mosh.mit.edu/">https://mosh.mit.edu/</a></p>
+        <p><a href="https://mosh.org/">https://mosh.org/</a></p>
       </dd>
 
       <dt><span class="part-name">tack</span>
@@ -1957,8 +1577,7 @@ diff --git a/st.info b/st.info
       <dd>
         <p>terminfo action checker</p>
 
-        <p><a href=
-        "https://invisible-island.net/ncurses/tack.html">https://invisible-island.net/ncurses/tack.html</a></p>
+        <p><a href="https://invisible-island.net/ncurses/tack.html">https://invisible-island.net/ncurses/tack.html</a></p>
       </dd>
 
       <dt><span class="part-name">tmux</span>
@@ -1978,8 +1597,7 @@ diff --git a/st.info b/st.info
         <p><em>vi-like-emacs</em> may be built to use the terminfo,
         termcap or curses interfaces.</p>
 
-        <p><a href=
-        "https://invisible-island.net/vile/">https://invisible-island.net/vile/</a></p>
+        <p><a href="https://invisible-island.net/vile/">https://invisible-island.net/vile/</a></p>
       </dd>
     </dl>
   </blockquote>
@@ -2041,13 +1659,13 @@ diff --git a/st.info b/st.info
   <p>Ongoing development work is done by <a href=
   "mailto:dickey@invisible-island.net">Thomas E. Dickey</a>. Thomas
   E. Dickey has acted as the maintainer for the Free Software
-  Foundation, which holds a <a href=
-  "https://invisible-island.net/ncurses/ncurses-license.html">copyright
-  on ncurses</a> 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 <a href=
-  "https://invisible-island.net/ncurses/ncurses.faq.html#relicensed">
-  ncurses FAQ</a> for additional information).</p>
+  Foundation, which held a <a href=
+  "https://invisible-island.net/ncurses/ncurses-license.html">copyright on ncurses</a> 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 <a href=
+  "https://invisible-island.net/ncurses/ncurses.faq.html#relicensed">ncurses FAQ</a> for
+  additional information).</p>
 
   <p>Contact the current maintainers at</p>
 
@@ -2062,7 +1680,6 @@ diff --git a/st.info b/st.info
     "mailto:bug-ncurses-request@gnu.org">bug-ncurses-request@gnu.org</a>
   </blockquote>
   containing the line:
-
   <blockquote>
     <p><code>subscribe</code>
     <em>&lt;name&gt;@&lt;host.domain&gt;</em></p>
@@ -2086,10 +1703,10 @@ diff --git a/st.info b/st.info
 
   <blockquote>
     <p><a href=
-    "ftp://ftp.invisible-island.net/ncurses/6.1/">ftp://ftp.invisible-island.net/ncurses/6.1/</a>
+    "ftp://ftp.invisible-island.net/ncurses/6.2/">ftp://ftp.invisible-island.net/ncurses/6.2/</a>
     and<br>
     <a href=
-    "https://invisible-mirror.net/archives/ncurses/6.1/">https://invisible-mirror.net/archives/ncurses/6.1/</a>&nbsp;.</p>
+    "https://invisible-mirror.net/archives/ncurses/6.2/">https://invisible-mirror.net/archives/ncurses/6.2/</a>&nbsp;.</p>
   </blockquote>
 
   <p>There is an archive of the mailing list here:</p>
@@ -2108,30 +1725,28 @@ diff --git a/st.info b/st.info
   which may be interesting by themselves:</p>
 
   <ul>
-    <li><a href=
-    "https://invisible-island.net/ncurses/ncurses-license.html"><span class="main-name">
-    ncurses</span> licensing</a></li>
+    <li><a href="https://invisible-island.net/ncurses/ncurses-license.html"><span class=
+    "main-name">ncurses</span> licensing</a></li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/ncurses-mapsyms.html">Symbol
-    versioning in <span class="main-name">ncurses</span></a></li>
+    <li><a href="https://invisible-island.net/ncurses/ncurses-mapsyms.html">Symbol versioning
+    in <span class="main-name">ncurses</span></a></li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/ncurses-slang.html">Comments
-    on <span class="main-name">ncurses</span> versus <span class=
+    <li><a href="https://invisible-island.net/ncurses/ncurses-slang.html">Comments on
+    <span class="main-name">ncurses</span> versus <span class=
     "main-name">slang</span> (S-Lang)</a></li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/tack.html">tack &ndash;
-    terminfo action checker</a></li>
+    <li><a href="https://invisible-island.net/ncurses/ncurses-openbsd.html">Comments on
+    <span class="main-name">OpenBSD</span></a></li>
 
-    <li><a href=
-    "https://invisible-island.net/ncurses/tctest.html">tctest
-    &ndash; termcap library checker</a></li>
+    <li><a href="https://invisible-island.net/ncurses/tack.html">tack &ndash; terminfo action
+    checker</a></li>
+
+    <li><a href="https://invisible-island.net/ncurses/tctest.html">tctest &ndash; termcap
+    library checker</a></li>
 
     <li><a href=
-    "https://invisible-island.net/ncurses/ncurses.html#download_database">
-    Terminal Database</a></li>
+    "https://invisible-island.net/ncurses/ncurses.html#download_database">Terminal
+    Database</a></li>
   </ul>
 
   <h2><a name="h2-other-stuff" id="h2-other-stuff">Other
@@ -2159,11 +1774,9 @@ diff --git a/st.info b/st.info
 
       <li>
         <a href="#h2-release-notes">Release Notes</a>
-
         <ul>
           <li>
             <a href="#h3-library">Library improvements</a>
-
             <ul>
               <li><a href="#h4-new-library">New features</a></li>
 
@@ -2174,7 +1787,6 @@ diff --git a/st.info b/st.info
 
           <li>
             <a href="#h3-programs">Program improvements</a>
-
             <ul>
               <li><a href="#h4-utilities">Utilities</a></li>
 
@@ -2190,7 +1802,6 @@ diff --git a/st.info b/st.info
 
           <li>
             <a href="#h3-config-config">Configuration changes</a>
-
             <ul>
               <li><a href="#h4-config-major">Major changes</a></li>