# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1714153159 14400
# Node ID b295be7a77ca4e4c7c58aca8e3ab78c176874626
# Parent  583637c89c117eec2e108735b1c70044e3a2ce41# Parent  c51b07a7142129e7b8155af81adcb553cbf0c15b
maint: merge default to bytecode-interpreter

diff -r 583637c89c11 -r b295be7a77ca autogen.sh
--- a/autogen.sh	Thu Apr 25 11:55:05 2024 -0400
+++ b/autogen.sh	Fri Apr 26 13:39:19 2024 -0400
@@ -4,7 +4,7 @@
 # also regenerates all aclocal.m4, config.h.in, Makefile.in, configure files
 # with new versions of autoconf or automake.
 
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
+# Copyright (C) 2003-2024 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff -r 583637c89c11 -r b295be7a77ca autopull.sh
--- a/autopull.sh	Thu Apr 25 11:55:05 2024 -0400
+++ b/autopull.sh	Fri Apr 26 13:39:19 2024 -0400
@@ -2,7 +2,7 @@
 # Convenience script for fetching auxiliary files that are omitted from
 # the version control repository of this package.
 
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
+# Copyright (C) 2003-2024 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff -r 583637c89c11 -r b295be7a77ca bootstrap
--- a/bootstrap	Thu Apr 25 11:55:05 2024 -0400
+++ b/bootstrap	Fri Apr 26 13:39:19 2024 -0400
@@ -1,9 +1,9 @@
 #! /bin/sh
 # Bootstrap this package from checked-out sources.
 
-scriptversion=2023-08-29.21; # UTC
+scriptversion=2024-04-13.15; # UTC
 
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
+# Copyright (C) 2003-2024 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -43,44 +43,55 @@
   GNULIB_SRCDIR            Specifies the local directory where gnulib
                            sources reside.  Use this if you already
                            have gnulib sources on your machine, and
-                           do not want to waste your bandwidth downloading
-                           them again.
-  GNULIB_URL               URL of the gnulib repository.  The default is
-                           $default_gnulib_url,
-                           which is Gnulib's upstream repository.
-
-Options:
-
-  --pull                   Do phase 1: pull files from network
-  --gen                    Do phase 2: generate from local files.
-                           (The default is to do both phases.)
-
-  --gnulib-srcdir=DIRNAME  specify the local directory where gnulib
-                           sources reside.  Use this if you already
-                           have gnulib sources on your machine, and
-                           you want to use these sources.  Defaults
-                           to \$GNULIB_SRCDIR
-  --gnulib-refdir=DIRNAME  specify the local directory where a gnulib
+                           you want to use these sources.
+  GNULIB_REFDIR            Specifies the local directory where a gnulib
                            repository (with a .git subdirectory) resides.
                            Use this if you already have gnulib sources
                            and history on your machine, and do not want
                            to waste your bandwidth downloading them again.
-                           Defaults to \$GNULIB_REFDIR
+                           Only used for phase 1 (--pull).
+  GNULIB_URL               URL of the gnulib repository.  The default is
+                           $default_gnulib_url,
+                           which is Gnulib's upstream repository.
+                           Only used for phase 1 (--pull).
+
+Options:
+
+  --pull                   Do phase 1: Pull files from the network.
+  --gen                    Do phase 2: Generate files from local files
+                           (no network access).
+                           (The default is to do both phases.)
 
-  --bootstrap-sync         if this bootstrap script is not identical to
+  --gnulib-srcdir=DIRNAME  Specifies the local directory where gnulib
+                           sources reside.  Use this if you already
+                           have gnulib sources on your machine, and
+                           you want to use these sources.  Defaults
+                           to \$GNULIB_SRCDIR.
+  --gnulib-refdir=DIRNAME  Specifies the local directory where a gnulib
+                           repository (with a .git subdirectory) resides.
+                           Use this if you already have gnulib sources
+                           and history on your machine, and do not want
+                           to waste your bandwidth downloading them again.
+                           Defaults to \$GNULIB_REFDIR.
+                           Only used for phase 1 (--pull).
+
+  --bootstrap-sync         If this bootstrap script is not identical to
                            the version in the local gnulib sources,
                            update this script, and then restart it with
-                           /bin/sh or the shell \$CONFIG_SHELL
-  --no-bootstrap-sync      do not check whether bootstrap is out of sync
+                           /bin/sh or the shell \$CONFIG_SHELL.
+  --no-bootstrap-sync      Do not check whether bootstrap is out of sync.
 
-  --copy                   copy files instead of creating symbolic links
-  --force                  attempt to bootstrap even if the sources seem
-                           not to have been checked out
-  --no-git                 do not use git to update gnulib.  Requires that
+  --copy                   Copy files instead of creating symbolic links.
+                           Only used for phase 2 (--gen).
+  --force                  Attempt to bootstrap even if the sources seem
+                           not to have been checked out.
+  --no-git                 Do not use git to update gnulib.  Requires that
                            \$GNULIB_SRCDIR or the --gnulib-srcdir option
                            points to a gnulib repository with the correct
-                           revision
-  --skip-po                do not download po files
+                           revision.
+                           Only used for phase 1 (--pull).
+  --skip-po                Do not download *.po files.
+                           Only used for phase 1 (--pull).
 EOF
   bootstrap_print_option_usage_hook
   cat <<EOF
@@ -92,11 +103,11 @@
 
 Gnulib sources can be fetched in various ways:
 
- * If the environment variable GNULIB_SRCDIR is set (either as an
-   environment variable or via the --gnulib-srcdir option), then sources
-   are fetched from that local directory.  If it is a git repository and
-   the configuration variable GNULIB_REVISION is set in bootstrap.conf,
-   then that revision is checked out.
+ * If GNULIB_SRCDIR is set (either as an environment variable or via the
+   --gnulib-srcdir option), then sources are fetched from that local
+   directory.  If it is a git repository and the configuration variable
+   GNULIB_REVISION is set in bootstrap.conf, then that revision is
+   checked out.
 
  * Otherwise, if this package is in a git repository with a 'gnulib'
    submodule configured, then that submodule is initialized and updated
@@ -192,7 +203,7 @@
 
 if $bootstrap_sync; then
   prepare_GNULIB_SRCDIR
-  upgrade_bootstrap
+  upgrade_bootstrap "$@"
   # Since we have now upgraded if needed, no need to try it a second time below.
   bootstrap_sync=false
 fi
@@ -217,10 +228,10 @@
 fi
 
 if $gen; then
- autogen \
-    `if $copy; then echo ' --copy'; fi` \
-    `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
-  || die "could not generate auxiliary files"
+  autogen \
+      `if $copy; then echo ' --copy'; fi` \
+      `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
+    || die "could not generate auxiliary files"
 fi
 
 # ----------------------------------------------------------------------------
diff -r 583637c89c11 -r b295be7a77ca bootstrap-funclib.sh
--- a/bootstrap-funclib.sh	Thu Apr 25 11:55:05 2024 -0400
+++ b/bootstrap-funclib.sh	Fri Apr 26 13:39:19 2024 -0400
@@ -1,8 +1,8 @@
 # A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
 
-scriptlibversion=2023-08-29.21; # UTC
+scriptlibversion=2024-04-13.15; # UTC
 
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
+# Copyright (C) 2003-2024 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -441,10 +441,9 @@
 # --------------------- Preparing GNULIB_SRCDIR for use. ---------------------
 # This is part of autopull.sh, but bootstrap needs it too, for self-upgrading.
 
+# cleanup_gnulib fails, removing the directory $gnulib_path first.
 cleanup_gnulib() {
   status=$?
-  # XXX It's a bad idea to erase the submodule directory if it contains local
-  #     modifications.
   rm -fr "$gnulib_path"
   exit $status
 }
@@ -462,48 +461,44 @@
     test -f "$GNULIB_SRCDIR/gnulib-tool" \
       || die "Error: --gnulib-srcdir or \$GNULIB_SRCDIR is specified," \
              "but does not contain gnulib-tool"
-  elif $use_git; then
+    if test -n "$GNULIB_REVISION" && $use_git; then
+      (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || exit $?
+    fi
+  else
+    if ! $use_git; then
+      die "Error: --no-git is specified," \
+          "but neither --gnulib-srcdir nor \$GNULIB_SRCDIR is specified"
+    fi
+    if git submodule -h | grep -- --reference > /dev/null; then
+      :
+    else
+      die "git version is too old, git >= 1.6.4 is required"
+    fi
     gnulib_path=$(git_modules_config submodule.gnulib.path)
-    test -z "$gnulib_path" && gnulib_path=gnulib
-
-    # Get gnulib files.  Populate $gnulib_path, possibly updating a
-    # submodule, for use in the rest of the script.
-
-    if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git \
-       && git_modules_config submodule.gnulib.url >/dev/null; then
-      # Use GNULIB_REFDIR as a reference.
-      echo "$0: getting gnulib files..."
-      if git submodule -h|grep -- --reference > /dev/null; then
-        # Prefer the one-liner available in git 1.6.4 or newer.
-        git submodule update --init --reference "$GNULIB_REFDIR" \
-          "$gnulib_path" || exit $?
+    if test -n "$gnulib_path"; then
+      # A submodule 'gnulib' is configured.
+      # Get gnulib files.  Populate $gnulib_path, updating the submodule.
+      if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git; then
+        # Use GNULIB_REFDIR as a reference.
+        echo "$0: getting gnulib files..."
+        git submodule update --init --reference "$GNULIB_REFDIR" "$gnulib_path" \
+          || exit $?
       else
-        # This fallback allows at least git 1.5.5.
-        if test -f "$gnulib_path"/gnulib-tool; then
-          # Since file already exists, assume submodule init already complete.
+        # GNULIB_REFDIR is not set or not usable. Ignore it.
+        if git_modules_config submodule.gnulib.url >/dev/null; then
+          echo "$0: getting gnulib files..."
+          git submodule init -- "$gnulib_path" || exit $?
           git submodule update -- "$gnulib_path" || exit $?
         else
-          # Older git can't clone into an empty directory.
-          rmdir "$gnulib_path" 2>/dev/null
-          git clone --reference "$GNULIB_REFDIR" \
-            "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
-            && git submodule init -- "$gnulib_path" \
-            && git submodule update -- "$gnulib_path" \
-            || exit $?
+          die "Error: submodule 'gnulib' has no configured url"
         fi
       fi
     else
-      # GNULIB_REFDIR is not set or not usable. Ignore it.
-      if git_modules_config submodule.gnulib.url >/dev/null; then
+      gnulib_path='gnulib'
+      if test ! -d "$gnulib_path"; then
+        # The subdirectory 'gnulib' does not yet exist. Clone into it.
         echo "$0: getting gnulib files..."
-        git submodule init -- "$gnulib_path" || exit $?
-        git submodule update -- "$gnulib_path" || exit $?
-
-      elif [ ! -d "$gnulib_path" ]; then
-        echo "$0: getting gnulib files..."
-
         trap cleanup_gnulib HUP INT PIPE TERM
-
         shallow=
         if test -z "$GNULIB_REVISION"; then
           if git clone -h 2>&1 | grep -- --depth > /dev/null; then
@@ -525,39 +520,32 @@
           # is without fetching all commits. So fall back to fetching all
           # commits.
           git -C "$gnulib_path" init
-          git -C "$gnulib_path" remote add origin \
-              ${GNULIB_URL:-$default_gnulib_url}
+          git -C "$gnulib_path" remote add origin ${GNULIB_URL:-$default_gnulib_url}
           git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION" \
             || git -C "$gnulib_path" fetch origin \
             || cleanup_gnulib
           git -C "$gnulib_path" reset --hard FETCH_HEAD
+          (cd "$gnulib_path" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
         fi
-
         trap - HUP INT PIPE TERM
-
-      elif test -n "$GNULIB_REVISION" \
-           && ! git --git-dir="$gnulib_path"/.git cat-file \
-                commit "$GNULIB_REVISION"; then
-        git --git-dir="$gnulib_path"/.git fetch
+      else
+        # The subdirectory 'gnulib' already exists.
+        if test -n "$GNULIB_REVISION"; then
+          if test -d "$gnulib_path/.git"; then
+            (cd "$gnulib_path" && git checkout "$GNULIB_REVISION") || exit 1
+          else
+            die "Error: GNULIB_REVISION is specified in bootstrap.conf," \
+                "but '$gnulib_path' contains no git history"
+          fi
+        fi
       fi
     fi
-    GNULIB_SRCDIR=$gnulib_path
-    # Verify that the submodule contains a gnulib checkout.
+    # Verify that $gnulib_path contains a gnulib checkout.
     test -f "$gnulib_path/gnulib-tool" \
-      || die "Error: $gnulib_path is supposed to contain a gnulib checkout," \
+      || die "Error: '$gnulib_path' is supposed to contain a gnulib checkout," \
              "but does not contain gnulib-tool"
+    GNULIB_SRCDIR=$gnulib_path
   fi
-
-  # XXX Should this be done if $use_git is false?
-  if test -d "$GNULIB_SRCDIR"/.git && test -n "$GNULIB_REVISION" \
-     && ! git_modules_config submodule.gnulib.url >/dev/null; then
-    if ! git --git-dir="$GNULIB_SRCDIR"/.git cat-file \
-         commit "$GNULIB_REVISION"; then
-      git --git-dir="$GNULIB_SRCDIR"/.git fetch
-    fi
-    (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
-  fi
-
   # $GNULIB_SRCDIR now points to the version of gnulib to use, and
   # we no longer need to use git or $gnulib_path below here.
 }
@@ -619,7 +607,8 @@
 autopull_usage() {
   cat <<EOF
 Usage: $me [OPTION]...
-Bootstrap this package from the checked-out sources.
+Bootstrap this package from the checked-out sources, phase 1:
+Pull files from the network.
 
 Optional environment variables:
   GNULIB_SRCDIR            Specifies the local directory where gnulib
@@ -636,18 +625,19 @@
                            which is Gnulib's upstream repository.
 
 Options:
-  --bootstrap-sync         if this bootstrap script is not identical to
+
+  --bootstrap-sync         If this bootstrap script is not identical to
                            the version in the local gnulib sources,
                            update this script, and then restart it with
-                           /bin/sh or the shell \$CONFIG_SHELL
-  --no-bootstrap-sync      do not check whether bootstrap is out of sync
-  --force                  attempt to bootstrap even if the sources seem
-                           not to have been checked out
-  --no-git                 do not use git to update gnulib.  Requires that
-                           \$GNULIB_SRCDIR or the --gnulib-srcdir option
-                           points to a gnulib repository with the correct
-                           revision
-  --skip-po                do not download po files
+                           /bin/sh or the shell \$CONFIG_SHELL.
+  --no-bootstrap-sync      Do not check whether bootstrap is out of sync.
+
+  --force                  Attempt to bootstrap even if the sources seem
+                           not to have been checked out.
+  --no-git                 Do not use git to update gnulib.  Requires that
+                           \$GNULIB_SRCDIR points to a gnulib repository
+                           with the correct revision.
+  --skip-po                Do not download *.po files.
 EOF
   bootstrap_print_option_usage_hook
   cat <<EOF
@@ -659,17 +649,16 @@
 
 Gnulib sources can be fetched in various ways:
 
- * If the environment variable GNULIB_SRCDIR is set (either as an
-   environment variable or via the --gnulib-srcdir option), then sources
-   are fetched from that local directory.  If it is a git repository and
-   the configuration variable GNULIB_REVISION is set in bootstrap.conf,
-   then that revision is checked out.
+ * If the environment variable GNULIB_SRCDIR is set, then sources are
+   fetched from that local directory.  If it is a git repository and the
+   configuration variable GNULIB_REVISION is set in bootstrap.conf, then
+   that revision is checked out.
 
  * Otherwise, if this package is in a git repository with a 'gnulib'
    submodule configured, then that submodule is initialized and updated
-   and sources are fetched from there.  If GNULIB_REFDIR is set (either
-   as an environment variable or via the --gnulib-refdir option) and is
-   a git repository, then it is used as a reference.
+   and sources are fetched from there.  If the environment variable
+   GNULIB_REFDIR is set and is a git repository, then it is used as a
+   reference.
 
  * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources
    are cloned into that directory using git from \$GNULIB_URL, defaulting
@@ -749,7 +738,7 @@
   if $use_gnulib || $bootstrap_sync; then
     prepare_GNULIB_SRCDIR
     if $bootstrap_sync; then
-      upgrade_bootstrap
+      upgrade_bootstrap "$@"
     fi
   fi
 
@@ -862,7 +851,8 @@
 autogen_usage() {
   cat <<EOF
 Usage: $me [OPTION]...
-Bootstrap this package from the checked-out sources.
+Bootstrap this package from the checked-out sources, phase 2:
+Generate files from local files (no network access).
 
 Optional environment variables:
   GNULIB_SRCDIR            Specifies the local directory where gnulib
@@ -871,9 +861,9 @@
                            you want to use these sources.
 
 Options:
-  --copy                   copy files instead of creating symbolic links
-  --force                  attempt to bootstrap even if the sources seem
-                           not to have been checked out
+  --copy                   Copy files instead of creating symbolic links.
+  --force                  Attempt to bootstrap even if the sources seem
+                           not to have been checked out.
 EOF
   bootstrap_print_option_usage_hook
   cat <<EOF
diff -r 583637c89c11 -r b295be7a77ca bootstrap.conf
--- a/bootstrap.conf	Thu Apr 25 11:55:05 2024 -0400
+++ b/bootstrap.conf	Fri Apr 26 13:39:19 2024 -0400
@@ -200,14 +200,9 @@
 #
 #   ./bootstrap --bootstrap-sync
 #
-# to update the ./bootstrap file from the selected gnulib revision,
-# followed by
-#
-#   patch -p1 -u < ./build-aux/gnulib-bootstrap-git-fetch.diff
-#
-# to apply local changes from build-aux/gnulib-bootstrap-git-fetch.diff
+# to update the ./bootstrap file from the selected gnulib revision.
 
-: ${GNULIB_REVISION=7a38f30f925db7d486460c18df41413f3c7ef74b}
+: ${GNULIB_REVISION=d4ec02b3cc70cddaaa5183cc5a45814e0afb2292}
 
 # Don't check for translations since we don't have any in Octave yet.
 # This avoids the need for sha1sum or compatible utility in bootstrap.
diff -r 583637c89c11 -r b295be7a77ca build-aux/gnulib-bootstrap-git-fetch.diff
--- a/build-aux/gnulib-bootstrap-git-fetch.diff	Thu Apr 25 11:55:05 2024 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,29 +0,0 @@
-Update bootstrap script from upstream gnulib to automatically fetch from repository if needed
-
-See also: https://lists.gnu.org/archive/html/bug-gnulib/2020-08/msg00150.html
-
---- ./bootstrap-funclib.sh.orig	2023-11-20 18:29:45.640064746 +0100
-+++ ./bootstrap-funclib.sh	2023-11-20 18:35:57.451241555 +0100
-@@ -534,6 +534,11 @@
-         fi
- 
-         trap - HUP INT PIPE TERM
-+
-+      elif test -n "$GNULIB_REVISION" \
-+           && ! git --git-dir="$gnulib_path"/.git cat-file \
-+                commit "$GNULIB_REVISION"; then
-+        git --git-dir="$gnulib_path"/.git fetch
-       fi
-     fi
-     GNULIB_SRCDIR=$gnulib_path
-@@ -546,6 +551,10 @@
-   # XXX Should this be done if $use_git is false?
-   if test -d "$GNULIB_SRCDIR"/.git && test -n "$GNULIB_REVISION" \
-      && ! git_modules_config submodule.gnulib.url >/dev/null; then
-+    if ! git --git-dir="$GNULIB_SRCDIR"/.git cat-file \
-+         commit "$GNULIB_REVISION"; then
-+      git --git-dir="$GNULIB_SRCDIR"/.git fetch
-+    fi
-     (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
-   fi
- 
diff -r 583637c89c11 -r b295be7a77ca etc/NEWS.10.md
--- a/etc/NEWS.10.md	Thu Apr 25 11:55:05 2024 -0400
+++ b/etc/NEWS.10.md	Fri Apr 26 13:39:19 2024 -0400
@@ -23,29 +23,28 @@
 inputs.
 
 - `jsonencode` now outputs integers and floating point integers without ".0"
-  suffix.
-  
+suffix.
+
 - `hist` now accepts N-dimensional array inputs for input `Y` which is
-  processed in columns as if the array was flattened to a 2-dimensional
-  array.
+processed in columns as if the array was flattened to a 2-dimensional array.
 
 ### Graphical User Interface
 
 ### Graphics backend
 
 - `polar` plots now include the center tick mark value, typically 0, in
-the 'rtick' parameter when the plot is created.  Subsequent modifications
-to 'rtick' by the function `rticks` will only include the center tick mark
+the `'rtick'` parameter when the plot is created.  Subsequent modifications
+to `'rtick'` by the function `rticks` will only include the center tick mark
 value if it is specified.
 
-- `view` correctly interprets cartesion viewpoints on main axes. (bug #65641)
+- `view` correctly interprets cartesian viewpoints on main axes (bug #65641).
 
 ### Matlab compatibility
 
 - `height` and `width` are now aliases for the `rows` and `columns` functions.
 
 - All colormaps now default to a size of 256 colors. (The previous default
-size was 64.
+size was 64.)
 
 - `griddata` output size more consistently matches the input interpolation
 points when they are input as vectors.  When they are same-orientation vectors,
@@ -58,7 +57,7 @@
 - `iqr` now provides compatible output for empty inputs.
 
 - `cross` now produces row vector outputs when the inputs are a mix of row
-and column vectors. (bug #61295)
+and column vectors (bug #61295).
 
 - `rat` now accepts complex inputs.
 
@@ -116,17 +115,16 @@
         sparse_auto_mutate     | none (see below)
 
 - `fminsearch` parameter passing:  A legacy, undocumented, and only partially
-  supported syntax for passing parameters to the minimized function `fcn`
-  called by `fminsearch` by appending them to the input argument list has
-  functioned intermittently since Octave 4.4.0.  Due to conflicts with other
-  compatibility-required input methods the documentation of this syntax was
-  removed in Octave 5.1.0, and the remaining functionality has been completely
-  removed in Octave 10, and attempts to call `fminsearch` with that syntax
-  will result in an error. The preferred, cross-platform compatible method of
-  passing parameters to any of the minimization functions (including
-  `fminsearch`, `fminbnd`, and `fminunc`) is through the use of Anonymous
-  Functions.  Specific examples of this can be found in the @ref{Minimizers}
-  section of the GNU Octave manual.
+supported syntax for passing parameters to the minimized function `fcn` called
+by `fminsearch` by appending them to the input argument list was partly
+implemented since Octave 4.4.0.  Due to conflicts with other input methods,
+the documentation of this syntax was removed in Octave 5.1.0.  The remaining
+functionality has been completely removed in Octave 10.  Attempts to call
+`fminsearch` with that syntax will result in an error.  The preferred method of
+passing parameters to any of the minimization functions (including
+`fminsearch`, `fminbnd`, and `fminunc`) is through the use of anonymous
+functions.  Specific examples of this can be found in the "Minimizers" section
+of the Octave manual.
 
 ### Build system
 
diff -r 583637c89c11 -r b295be7a77ca libgui/graphics/GLCanvas.cc
--- a/libgui/graphics/GLCanvas.cc	Thu Apr 25 11:55:05 2024 -0400
+++ b/libgui/graphics/GLCanvas.cc	Fri Apr 26 13:39:19 2024 -0400
@@ -43,6 +43,7 @@
 {
   setFocusPolicy (Qt::ClickFocus);
   setFocus ();
+  setUpdateBehavior (QOpenGLWidget::PartialUpdate);
 }
 
 GLWidget::~GLWidget () { }
diff -r 583637c89c11 -r b295be7a77ca libinterp/corefcn/perms.cc
--- a/libinterp/corefcn/perms.cc	Thu Apr 25 11:55:05 2024 -0400
+++ b/libinterp/corefcn/perms.cc	Fri Apr 26 13:39:19 2024 -0400
@@ -50,30 +50,6 @@
 // Use C++ template to cater for the different octave array classes.
 //
 
-// FIXME: To allow comparison between all supported template types, we need
-// to use either "if constexpr" (supported in C++17) or template specialisation
-// (supported in C++11).  Currently (2024), Octave stipulates the usage of
-// C++11, so the (slightly more complex) template specialization is used.
-// Once Octave moves to C++17 or beyond, the following code snippet is
-// preferrable and the comparison templates can be removed:
-// bool isequal;
-// if constexpr (std::is_same<T, octave_value>::value)
-//   isequal = Ar[i].is_equal (Ar[j]);
-// else
-//   isequal = (Ar[i] == Ar[j]);
-
-template <typename T>
-bool is_equal_T (T a, T b)
-{
-  return a == b;
-}
-
-template <>
-bool is_equal_T<octave_value> (octave_value a, octave_value b)
-{
-  return a.is_equal (b);
-}
-
 template <typename T>
 static inline Array<T>
 GetPerms (const Array<T>& ar_in, bool uniq_v = false)
@@ -105,7 +81,13 @@
         {
           for (octave_idx_type j = i + 1; j < m; j++)
             {
-              bool isequal = is_equal_T<T> (Ar[i], Ar[j]);
+              bool isequal;
+              if constexpr (std::is_same<T, octave_value>::value)
+                // operator '==' is not supported for octave_value objects
+                isequal = Ar[i].is_equal (Ar[j]);
+              else
+                isequal = (Ar[i] == Ar[j]);
+
               if (myvidx[j] > myvidx[i] && isequal)
                 {
                   myvidx[j] = myvidx[i];  // not yet processed...