--- a/.dir-locals.el	Wed Jul 10 20:02:44 2019 -0700
+++ b/.dir-locals.el	Fri Jul 12 12:14:43 2019 -0400
@@ -1,11 +1,6 @@
 ((nil .
       ((c-file-style . "gnu")
        (indent-tabs-mode . nil)
-       (fill-column . 72)
-       (eval . (when (and (buffer-file-name)
-                          (string-match-p "\\.h\\'" (buffer-file-name))
-                          (not (string-match-p "/gnulib/" (buffer-file-name))))
-                 (c++-mode)
-                 (c-set-style "gnu")))))
+       (fill-column . 72)))
  (change-log-mode . ((indent-tabs-mode . t)))
  (makefile-mode . ((indent-tabs-mode . t))))

--- a/.hgignore	Wed Jul 10 20:02:44 2019 -0700
+++ b/.hgignore	Fri Jul 12 12:14:43 2019 -0400
@@ -28,6 +28,11 @@
 ^Makefile\.in$
 ^INSTALL$
 
+## CMake associated files
+# Octave doesn't use CMake, but some IDEs use this index file to indicate
+# what files are part of a project (e.g., CLion).  Ignore it (bug #55901).
+^CMakeLists.txt$
+
 ## Emacs associated files
 (^|/)TAGS$
 (^|/)semantic.cache$
@@ -60,7 +65,6 @@
 .*\.Plo$
 .*\.Po$
 
-
 ## DLDFCN associated files
 ^libinterp/dldfcn/module\.mk$
 (^|/)libinterp/dldfcn/PKG_ADD$

--- a/CITATION	Wed Jul 10 20:02:44 2019 -0700
+++ b/CITATION	Fri Jul 12 12:14:43 2019 -0400
@@ -15,5 +15,5 @@
   }
 
 We have invested a lot of time and effort in creating GNU Octave, please
-cite it when using it.  See also `citation pkgname' for citing Octave
+cite it when using it.  See also 'citation pkgname' for citing Octave
 packages.

--- a/NEWS	Wed Jul 10 20:02:44 2019 -0700
+++ b/NEWS	Fri Jul 12 12:14:43 2019 -0400
@@ -1,324 +1,151 @@
-Summary of important user-visible changes for version 5 (2019-02-23):
---------------------------------------------------------------------
+Summary of important user-visible changes for version 6 (yyyy-mm-dd):
+----------------------------------------------------------------------
 
 ### General improvements
 
-- The Octave plotting system now supports high resolution screens,
-  i.e., those with greater than 96 DPI which are referred to as
-  HiDPI/Retina monitors.
-
-- Unicode character support for files and folders in Windows.
+- The `edit` function option `"editinplace"` now defaults to `true` and
+  the option `"home"` now defaults to the empty matrix `[]`.  Files will
+  no longer be copied to the user's HOME directory for editing.  The old
+  behavior can be restored by setting `"editinplace"` to `false` and
+  `"home"` to `"~/octave"`.
 
-- A new core function `movfun` will apply a function to a sliding
-  window of arbitrary size on a dataset and accumulate the results.
-  Many common cases have been implemented using the naming
-  scheme `movXXX` where `XXX` is the function that will be applied.
-  For example, the moving average over a dataset is `movmean`.
-  New moving window functions:
-
-  `movfun`  `movslice`
-  `movmad`  `movmax`   `movmean`  `movmedian`  `movmin`  `movprod`
-  `movstd`  `movsum`   `movvar`
+#### Graphics backend
 
-- The `fsolve` function has been tweaked to use larger step sizes when
-  calculating the Jacobian of a function with finite differences.
-  This leads to faster convergence.
-
-- The `ranks` function has been recoded for performance and is now 25X
-  faster.  In addition, it now supports a third argument that specifies
-  how to resolve the ranking of tie values.
+- Graphic primitives now accept a color property value of `"none"`
+  which is useful when a particular primitive needs to be hidden
+  (for example, the Y-axis of an axes object with `"ycolor" = "none"`)
+  without hiding the entire primitive `"visibility" = "off"`.
 
-- The function `randi` has been recoded to produce an unbiased (all
-  results are equally likely) sample of integers.  This may produce
-  different results in existing code.  If it is necessary to reproduce
-  the exact random integer sequence as in previous versions use
-
-  `ri = imin + floor ((imax - imin + 1) * rand ());`
-
-- The function `isdefinite` now returns `true` or `false` rather than
-  `-1`, `0`, or `1`.  To test for a positive semi-definite matrix (old
-  output of `0`) check whether the following two conditions hold:
+- A new property `"FontSmoothing"` has been added to text and axes
+  objects that controls whether anti-aliasing is used during the
+  rendering of characters.  The default is "on" which produces smooth,
+  more visually appealing text.
 
-    `isdefinite (A) => 0`  and  `isdefinite (A + 5*TOL, TOL) => 1`
-
-- The `intmax`, `intmin`, and `flintmax` functions now accept a variable
-  as input.  Existing code to query the range of an existing variable can
-  be simplified by removing the call to `class` that was previously
-  required.  For example defining the variable `x = int8 (3)` in the
-  workspace, calls like
+- The figure property `"windowscrollwheelfcn"`is now implemented.
+  This makes it possible to provide a callback function to be executed when
+  users manipulate the mouse wheel on a given figure.
 
-    `range = [ intmin(class(x)), intmax(class(x)) ]`
-
-  can in Octave 5 be simplified to `range = [ intmin(x), intmax(x) ]`.
-
-- The path handling functions no longer perform variable or brace
-  expansion on path elements and Octave's load-path is no longer
-  subject to these expansions.
+- The figure properties `"pointer"`, `"pointershapecdata"`, and
+  `"pointershapehotspot"` are now implemented.  This makes it possible
+  to change the shape of the cursor (pointer in Matlab-speak) displayed
+  in a plot window.
 
-- A new printing device is available, `"-ddumb"`, which produces ASCII
-  art for plots.  This device is only available with the gnuplot toolkit.
-
-- The `msgbox` function has changed in two respects: the default WindowStyle
-  is now `"non-modal"`, and the default interpreter for the message is now
-  `"tex"`.  Both WindowStyle and Interpreter can be controlled by passing an
-  option struct argument.
-
-### Dependencies
+- The appearance of patterned lines `"LineStyle" = ":"|"--"|"-."` has
+  been improved for small widths (`"LineWidth"` less than 1.5 pixels)
+  which is a common scenario.
 
-- The GUI requires Qt libraries.  The minimum Qt4 version supported is
-  Qt4.8.  Qt5 of any version is preferred.
+- Printing to EPS files now uses a tight bounding box (`"-tight"`
+  argument to print) by default.  This makes more sense for EPS
+  files which are normally embedded within other documents, and is
+  Matlab compatible.  If necessary use the `"-loose"` option to
+  reproduce figures as they appeared in previous versions of Octave.
 
-- The OSMesa library is no longer used.  To print invisible figures
-  when using OpenGL graphics, the Qt `QOFFSCREENSURFACE` feature must be
-  available and you must use the qt graphics toolkit.
-
-- The FFTW library is now required to perform FFT calculations.
-  The FFTPACK sources have been removed from Octave.
-
+- The following print devices are no longer officially supported: cdr,
+  corel, aifm, ill, cgm, hpgl, mf and dxf.  A warning will be thrown
+  when using those devices, and the code for supporting those formats
+  will eventually be removed from a future version of Octave.
 
 ### Matlab compatibility
 
-- The determination of an object's dimensions, size, and shape by the
-  functions `ndims`, `rows`, `columns`, `isscalar`, `isvector`,
-  `isrow`, `iscolumn`, `ismatrix`, and `issquare` now fully depends
-  on the function size.  Thus, any user-defined object can ensure correct
-  treatment by the aforementioned functions by properly overloading the
-  `size` function.
+- The function `unique` now returns column index vectors for the second
+  and third outputs.  When duplicate values are present, the default
+  index to return is now the `"first"` occurrence.  The previous Octave
+  behavior, or Matlab behavior from releases prior to R2012b, can be
+  obtained by using the `"legacy"` flag.
 
-- The functions `issymmetric` and `ishermitian` accept an option
-  `"nonskew"` or `"skew"` to calculate the symmetric or skew-symmetric
-  property of a matrix.  Performance has also been increased.
-
-- The `issorted` function now uses a direction option of `"ascend"`
-  or `"descend"`.  Change all uses of `"ascending"` and `"descending"`
-  in existing code to the new options.
+- The function `setdiff` with the `"rows"` argument now returns Matlab
+  compatible results.  The previous Octave behavior, or Matlab behavior
+  from releases prior to R2012b, can be obtained by using the `"legacy"`
+  flag.
 
-- The `strncmp` and `strncmpi` functions now return `true` if the two
-  input strings match, even though the number of characters specified
-  by `n` exceeds the string length.  For Example:
-
-    `strncmp ("abc", "abc", 100)`
-
-  returns `true` in Octave 5 and `false` in older versions of Octave.
+- The functions `intersect`, `setxor`, `union`, now accept a `"legacy"`
+  flag which changes the index values (second and third outputs) as well
+  as the orientation of all outputs to match Matlab releases prior to
+  R2012b.
 
-- The `str2func` function no longer accepts a second `"global"` argument.
-  This argument was typically used to allow functions that accept
-  function names as arguments to avoid conflicts with subfunctions or
-  nested functions.  Instead, it's best to avoid this situation
-  entirely and require users to pass function handles rather than
-  function names.
+- Complex RESTful web services can now be accessed by the `webread` and
+  `webwrite` functions alongside with the `weboptions` structure.  One
+  major feature is the support for cookies to enable RESTful
+  communication with the web service.
 
-- Using `clear` with no arguments now removes only local variables
-  from the current workspace.  Global variables will no longer be
-  visible, but they continue to exist in the global workspace and
-  possibly other workspaces such as the base workspace.
+  Additionally, the system web browser can be opened by the `web` function.
+
+- The interpreter now supports handles to nested functions.
+
+- The graphics properties `"LineWidth"` and `"MarkerSize"` are now
+  measured in points, *not* pixels.  Compared to previous versions
+  of Octave, some lines and markers will appear 4/3 larger.
 
 
-#### Nonlinear Equations
-
-Several default solver options have been changed to be Matlab compatible.
-This *may* result in existing code producing different results.
-
-- `fsolve`
-
-  Option         |   New Default    | Old Default
-  ---------------|------------------|-------------
-  `FinDiffType`  |    `"forward"`   |  `"central"`
-  `MaxFunEvals`  | `100*length(x0)` |    `Inf`
-  `TolFun`       |     `1e-6`       |    `1e-7`
-  `TolX`         |     `1e-6`       |    `1e-7`
-  `Updating`     |     `"off"`      |    `"on"`
-
-- `fminsearch`
-
-  Option   | New Default | Old Default
-  ---------|-------------|------------
-  `TolFun` |   `1e-7`    |   `1e-4`
-
-- `fminbnd`
-
-  Option         | New Default | Old Default
-  ---------------|-------------|------------
-  `MaxFunEvals`  |     `500`   |   `Inf`
-  `MaxIter`      |     `500`   |   `Inf`
-  `TolX`         |    `1e-4`   |   `1e-8`
-
-- `fminunc`
-
-  Option         |   New Default    | Old Default
-  ---------------|------------------|------------
-  `FinDiffType`  |   `"forward"`    | `"central"`
-  `MaxFunEvals`  | `100*length(x0)` |   `Inf`
-  `TolX`         |     `1e-6`       |   `1e-7`
-  `TolFun`       |     `1e-6`       |   `1e-7`
-
-
-#### Graphic objects
-
-- Figure graphic objects have a new property `"Number"` which is
-  read-only and will return the handle (number) of the figure.
-  However, if the property `"IntegerHandle"` has been set to `"off"`
-  then the property will return an empty matrix `[]`.
-
-- Patch and surface graphic objects now use the `"FaceNormals"` property
-  for flat lighting.
+### Alphabetical list of new functions added in Octave 6
 
-- `"FaceNormals"` and `"VertexNormals"` for patch and surface graphic
-  objects are now calculated only when necessary to improve graphics
-  performance.  In order for any normals to be calculated the
-  `"FaceLighting"` property must be set to `"flat"` (FaceNormals) or
-  `"gouraud"` (VertexNormals), **and** a light object must be present
-  in the axes.
-
-- The `"Margin"` property of `text`-objects has a new default of `3`
-  rather than `2`.
-
-- Printing to raster formats (bitmaps like PNG or JPEG) now uses an
-  OpenGL-based method by default.  The print options `"-opengl"`
-  (raster) and `"-painters"` (vector) have been added ("qt" toolkit
-  only).  The figure property `"renderer"` specifies which renderer to
-  use.  When the property `"renderermode"` is `"auto"` Octave will select
-  `"-opengl"` for a raster output format and `"-painters"` for a vector
-  output format.
-
-- A new print option `"-RGBImage"` has been added which captures the
-  pixels of a figure as an image.  This is similar to screen capture
-  tools, except that print formatting options can be used to, for
-  example, change the resolution or display the image in black and
-  white.
-
-- Two new print options for page-based formats (PDF, PostScript) have
-  been added.  The `"-fillpage"` option will stretch the plot to occupy
-  the entire page with 0.25 inch margins all around.  The `"-bestfit"`
-  option will expand the plot to take up as much room as possible on
-  the page without distorting the original aspect ratio of the plot.
-
-- Printing using the `"-dtiff"` output device will now create compressed
-  images using LZW compression.  To produce uncompressed images use the
-  `"-dtiffn"` device.
-
-
-### Legacy functions
-
-The following functions have been declared legacy functions which
-means they are obsolete and should not be used in any new code.
-Unlike deprecated functions, however, their removal from Octave has
-not yet been scheduled.
-
-  Function               | Replacement
-  -----------------------|------------------
-  `findstr`              | `strfind`
-  `flipdim`              | `flip`
-  `isdir`                | `isfolder` or `dir_in_loadpath`
-  `isequalwithequalnans` | `isequaln`
-  `isstr`                | `ischar`
-  `setstr`               | `char`
-  `strmatch`             | `strncmp` or `strcmp`
-  `strread`              | `textscan`
-  `textread`             | `textscan`
+- `lightangle`
+- `newline`
+- `verLessThan`
+- `web`
+- `weboptions`
+- `webread`
+- `webwrite`
 
 
 ### Deprecated functions and properties
 
-The following functions and graphics properties have been deprecated
-in Octave 5 and will be removed from Octave 7 (or whatever version
-is the second major release after 5):
-
-- Functions
-
-  Function                 | Replacement
-  -------------------------|-------------------
-  `output_max_field_width` | `output_precision`
-  `is_keyword`             | `iskeyword`
-
-- Graphics properties
-
-  Object           | Property      | Value
-  -----------------|---------------|------------
-  `text`           | `fontangle`   | `"oblique"`
-  `uibuttongroup`  | `fontangle`   | `"oblique"`
-  `uicontrol`      | `fontangle`   | `"oblique"`
-  `uipanel`        | `fontangle`   | `"oblique"`
-  `uitable`        | `fontangle`   | `"oblique"`
-
-- Specifying `legend` position with a numeric argument is deprecated.
-  Use a string argument instead.
-
-- The environment variable used by `mkoctfile` for linker flags is now
-  `LDFLAGS` rather than `LFLAGS`.  `LFLAGS` is deprecated, and a warning
-  is emitted if is used, but it will continue to work.
-
-
-### Removed functions and properties
-
-The following functions and properties were deprecated in Octave 4.2
-and have been removed from Octave 5.
+The following functions and properties have been deprecated in Octave 6
+and will be removed from Octave 8 (or whatever version is the second
+major release after 6):
 
 - Functions
 
   Function               | Replacement
   -----------------------|------------------
-  `bitmax`               | `flintmax`
-  `mahalanobis`          | `mahal` in Octave Forge statistics pkg
-  `md5sum`               | `hash`
-  `octave_config_info`   | `__octave_config_info__`
-  `onenormest`           | `normest1`
-  `sleep`                | `pause`
-  `usleep`               | `pause`
-  `wavread`              | `audioread`
-  `wavwrite`             | `audiowrite`
+  `runtests`             | `oruntests`
 
 - Properties
 
-  Object      | Property          | Value
-  ------------|-------------------|---------
-  `axes`      | `xaxislocation`   | `"zero"`
-              | `yaxislocation`   | `"zero"`
-  `hggroup`   | `erasemode`       |
-  `image`     | `erasemode`       |
-  `line`      | `erasemode`       |
-  `patch`     | `erasemode`       |
-  `patch`     | `normalmode`      |
-  `surface`   | `erasemode`       |
-  `surface`   | `normalmode`      |
-  `text`      | `erasemode`       |
+  Object           | Property      | Value
+  -----------------|---------------|------------
+                   |               |
 
 
-### Alphabetical list of new functions added in 5
+### Removed functions and properties
+
+The following functions and properties were deprecated in Octave 4.4
+and have been removed from Octave 6.
+
+- Functions
+
+  Function             | Replacement
+  ---------------------|------------------
+  `chop`               | `sprintf` for visual results
+  `desktop`            | `isguirunning`
+  `tmpnam`             | `tempname`
+  `toascii`            | `double`
+  `java2mat`           | `__java2mat__`
+
+- Properties
 
-- `clearvars`
-- `isfile`
-- `isfolder`
-- `matlab.lang.makeUniqueStrings`
-- `matlab.lang.makeValidName`
-- `movegui`
-- `movfun`
-- `movie`
-- `movmad`
-- `movmax`
-- `movmean`
-- `movmedian`
-- `movmin`
-- `movprod`
-- `movslice`
-- `movstd`
-- `movsum`
-- `movvar`
-- `openfig`
-- `ordeig`
-- `savefig`
-- `uitable`
+  Object               | Property                  | Value
+  ---------------------|---------------------------|-----------------------
+  `figure`             | `doublebuffer`            |
+                       | `mincolormap`             |
+                       | `wvisual`                 |
+                       | `wvisualmode`             |
+                       | `xdisplay`                |
+                       | `xvisual`                 |
+                       | `xvisualmode`             |
+  `axes`               | `drawmode`                |
+  `annotation`         | `edgecolor ("rectangle")` |
+  `text`               | `fontweight`              | `"demi"` and `"light"`
+  `uicontrol`          | `fontweight`              | `"demi"` and `"light"`
+  `uipanel`            | `fontweight`              | `"demi"` and `"light"`
+  `uibuttongroup`      | `fontweight`              | `"demi"` and `"light"`
+  `uitable`            | `fontweight`              | `"demi"` and `"light"`
 
 
 ### Old release news
 
-- [Octave 4.4.x](etc/NEWS.4)
-- [Octave 4.2.x](etc/NEWS.4)
-- [Octave 4.0.x](etc/NEWS.4)
-- [Octave 3.8.x](etc/NEWS.3)
-- [Octave 3.6.x](etc/NEWS.3)
-- [Octave 3.4.x](etc/NEWS.3)
-- [Octave 3.2.x](etc/NEWS.3)
-- [Octave 3.0.x](etc/NEWS.3)
+- [Octave 5.x](etc/NEWS.5)
+- [Octave 4.x](etc/NEWS.4)
+- [Octave 3.x](etc/NEWS.3)
 - [Octave 2.x](etc/NEWS.2)
 - [Octave 1.x](etc/NEWS.1)

--- a/build-aux/subst-config-vals.in.sh	Wed Jul 10 20:02:44 2019 -0700
+++ b/build-aux/subst-config-vals.in.sh	Fri Jul 12 12:14:43 2019 -0400
@@ -211,6 +211,9 @@
 SUNDIALS_NVECSERIAL_CPPFLAGS="@SUNDIALS_NVECSERIAL_CPPFLAGS@"
 SUNDIALS_NVECSERIAL_LDFLAGS="@SUNDIALS_NVECSERIAL_LDFLAGS@"
 SUNDIALS_NVECSERIAL_LIBS="@SUNDIALS_NVECSERIAL_LIBS@"
+SUNDIALS_SUNLINSOLKLU_CPPFLAGS="@SUNDIALS_SUNLINSOLKLU_CPPFLAGS@"
+SUNDIALS_SUNLINSOLKLU_LDFLAGS="@SUNDIALS_SUNLINSOLKLU_LDFLAGS@"
+SUNDIALS_SUNLINSOLKLU_LIBS="@SUNDIALS_SUNLINSOLKLU_LIBS@"
 TERM_LIBS="@TERM_LIBS@"
 UMFPACK_CPPFLAGS="@UMFPACK_CPPFLAGS@"
 UMFPACK_LDFLAGS="@UMFPACK_LDFLAGS@"
@@ -380,6 +383,9 @@
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_CPPFLAGS%|\"${SUNDIALS_NVECSERIAL_CPPFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_LDFLAGS%|\"${SUNDIALS_NVECSERIAL_LDFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_LIBS%|\"${SUNDIALS_NVECSERIAL_LIBS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_CPPFLAGS%|\"${SUNDIALS_SUNLINSOLKLU_CPPFLAGS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_LDFLAGS%|\"${SUNDIALS_SUNLINSOLKLU_LDFLAGS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_LIBS%|\"${SUNDIALS_SUNLINSOLKLU_LIBS}\"|" \
   -e "s|%OCTAVE_CONF_TERM_LIBS%|\"${TERM_LIBS}\"|" \
   -e "s|%OCTAVE_CONF_UMFPACK_CPPFLAGS%|\"${UMFPACK_CPPFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_UMFPACK_LDFLAGS%|\"${UMFPACK_LDFLAGS}\"|" \

--- a/build-aux/subst-cross-config-vals.in.sh	Wed Jul 10 20:02:44 2019 -0700
+++ b/build-aux/subst-cross-config-vals.in.sh	Fri Jul 12 12:14:43 2019 -0400
@@ -215,6 +215,9 @@
 SUNDIALS_NVECSERIAL_CPPFLAGS="@SUNDIALS_NVECSERIAL_CPPFLAGS@"
 SUNDIALS_NVECSERIAL_LDFLAGS="@SUNDIALS_NVECSERIAL_LDFLAGS@"
 SUNDIALS_NVECSERIAL_LIBS="@SUNDIALS_NVECSERIAL_LIBS@"
+SUNDIALS_SUNLINSOLKLU_CPPFLAGS="@SUNDIALS_SUNLINSOLKLU_CPPFLAGS@"
+SUNDIALS_SUNLINSOLKLU_LDFLAGS="@SUNDIALS_SUNLINSOLKLU_LDFLAGS@"
+SUNDIALS_SUNLINSOLKLU_LIBS="@SUNDIALS_SUNLINSOLKLU_LIBS@"
 TERM_LIBS="@TERM_LIBS@"
 UMFPACK_CPPFLAGS="@UMFPACK_CPPFLAGS@"
 UMFPACK_LDFLAGS="@UMFPACK_LDFLAGS@"
@@ -384,6 +387,9 @@
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_CPPFLAGS%|\"${SUNDIALS_NVECSERIAL_CPPFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_LDFLAGS%|\"${SUNDIALS_NVECSERIAL_LDFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_SUNDIALS_NVECSERIAL_LIBS%|\"${SUNDIALS_NVECSERIAL_LIBS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_CPPFLAGS%|\"${SUNDIALS_SUNLINSOLKLU_CPPFLAGS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_LDFLAGS%|\"${SUNDIALS_SUNLINSOLKLU_LDFLAGS}\"|" \
+  -e "s|%OCTAVE_CONF_SUNDIALS_SUNLINSOLKLU_LIBS%|\"${SUNDIALS_SUNLINSOLKLU_LIBS}\"|" \
   -e "s|%OCTAVE_CONF_TERM_LIBS%|\"${TERM_LIBS}\"|" \
   -e "s|%OCTAVE_CONF_UMFPACK_CPPFLAGS%|\"${UMFPACK_CPPFLAGS}\"|" \
   -e "s|%OCTAVE_CONF_UMFPACK_LDFLAGS%|\"${UMFPACK_LDFLAGS}\"|" \

--- a/build-aux/update-bug-status.sh	Wed Jul 10 20:02:44 2019 -0700
+++ b/build-aux/update-bug-status.sh	Fri Jul 12 12:14:43 2019 -0400
@@ -23,7 +23,7 @@
 done | sort -u)
 
 fixed_bug_numbers=$(for num in $bug_numbers; do
-  status=$(wget -q -O - https://octave.org/testfailure/?$num | sed -n 's/.*>Status:<\/span><\/span>&nbsp;<\/td><td valign="middle" width="35%">\([^<]*\)<.*/\1/p');
+  status=$(wget -q -O - https://octave.org/testfailure/?$num | tr -d '\n' | sed -n 's/.*>Status:<\/span><\/span>&nbsp;<\/td> *<td valign="middle" width="35%">\([^<]*\)<.*/\1/p');
   if [ "$status" = "Fixed" ]; then echo "$num"; fi
 done)
 

--- a/configure.ac	Wed Jul 10 20:02:44 2019 -0700
+++ b/configure.ac	Fri Jul 12 12:14:43 2019 -0400
@@ -20,7 +20,7 @@
 
 ### Initialize Autoconf
 AC_PREREQ([2.65])
-AC_INIT([GNU Octave], [5.1.1], [https://octave.org/bugs.html], [octave],
+AC_INIT([GNU Octave], [6.0.0], [https://octave.org/bugs.html], [octave],
         [https://www.gnu.org/software/octave/])
 
 ### Declare version numbers
@@ -32,9 +32,9 @@
 ## explains how to update these numbers for release and development
 ## versions.
 
-OCTAVE_MAJOR_VERSION=5
-OCTAVE_MINOR_VERSION=1
-OCTAVE_PATCH_VERSION=1
+OCTAVE_MAJOR_VERSION=6
+OCTAVE_MINOR_VERSION=0
+OCTAVE_PATCH_VERSION=0
 
 dnl PACKAGE_VERSION is set by the AC_INIT VERSION argument.
 OCTAVE_VERSION="$PACKAGE_VERSION"
@@ -56,7 +56,7 @@
 dnl FIXME: Since we also set libtool versions for liboctave and libinterp,
 dnl perhaps we should be computing the "api version" from those versions numbers
 dnl in some way instead of setting it independently here.
-OCTAVE_API_VERSION="api-v53"
+OCTAVE_API_VERSION="api-v53+"
 
 AC_SUBST(OCTAVE_MAJOR_VERSION)
 AC_SUBST(OCTAVE_MINOR_VERSION)
@@ -850,9 +850,7 @@
 RDYNAMIC_FLAG=
 DL_API_MSG=""
 dlopen_api=no
-shl_load_api=no
 loadlibrary_api=no
-dyld_api=no
 
 case $lt_cv_dlopen in
   dlopen)
@@ -862,24 +860,12 @@
       [Define to 1 if system has dlopen, dlsym, dlerror, and dlclose for dynamic linking.])
     OCTAVE_CXX_FLAG([-rdynamic], [RDYNAMIC_FLAG=-rdynamic])
   ;;
-  shl_load)
-    shl_load_api=yes
-    DL_API_MSG="shl_load"
-    AC_DEFINE(HAVE_SHL_LOAD_API, 1,
-      [Define to 1 if system has shl_load and shl_findsym for dynamic linking.])
-  ;;
   LoadLibrary)
     loadlibrary_api=yes
     DL_API_MSG="LoadLibrary"
     AC_DEFINE(HAVE_LOADLIBRARY_API, 1,
       [Define to 1 if system has LoadLibrary for dynamic linking.])
   ;;
-  dyld)
-    dyld_api=yes
-    DL_API_MSG="dyld"
-    AC_DEFINE(HAVE_DYLD_API, 1,
-      [Define to 1 if system has dyld for dynamic linking.])
-  ;;
   *)
     AC_MSG_ERROR([Octave requires some way to perform dynamic linking.])
   ;;
@@ -2206,46 +2192,85 @@
 ### Check for SUNDIALS NVECTOR serial library and header.
 
 OCTAVE_CHECK_LIB(sundials_nvecserial, [SUNDIALS NVECTOR],
-  [SUNDIALS NVECTOR serial library not found.  Solvers ode15i and ode15s will be disabled.],
+  [SUNDIALS NVECTOR serial library not found.  The solvers ode15i and ode15s will be disabled.],
   [nvector/nvector_serial.h nvector_serial.h ], [N_VNew_Serial],
-  [], [don't use SUNDIALS NVECTOR library, solvers ode15i and ode15s will be disabled])
+  [], [don't use SUNDIALS NVECTOR library, disable solvers ode15i and ode15s])
 
 ### Check for SUNDIALS IDA library and header.
 
 save_LIBS="$LIBS"
 LIBS="$SUNDIALS_NVECSERIAL_LIBS $KLU_LIBS $BLAS_LIBS $FLIBS $LIBS"
 OCTAVE_CHECK_LIB(sundials_ida, [SUNDIALS IDA],
-  [SUNDIALS IDA library not found.  Solvers ode15i and ode15s will be disabled.],
+  [SUNDIALS IDA library not found.  The solvers ode15i and ode15s will be disabled.],
   [ida/ida.h ida.h], [IDAInit],
-  [], [don't use SUNDIALS IDA library, solvers ode15i and ode15s will be disabled],
-  [warn_sundials_ida=
-   OCTAVE_CHECK_SUNDIALS_SIZEOF_REALTYPE
-   OCTAVE_CHECK_SUNDIALS_IDA_DENSE
-   OCTAVE_CHECK_SUNDIALS_IDAKLU])
+  [], [don't use SUNDIALS IDA library, disable solvers ode15i and ode15s])
+LIBS="$save_LIBS"
+
+### Check for SUNDIALS library features, some required, some optional.
+
+LIBS="$SUNDIALS_IDA_LIBS $SUNDIALS_NVECSERIAL_LIBS $KLU_LIBS $BLAS_LIBS $FLIBS $LIBS"
+if test -z "$warn_sundials_nvecserial" && test -z "$warn_sundials_ida"; then
+  dnl Any of the following tests could determine that SUNDIALS is incompatible
+  dnl and should be disabled. In that event, they all populate the same
+  dnl variable with appropriate warning messages, and further tests should be
+  dnl skipped if a warning message has already been generated that SUNDIALS is
+  dnl disabled.
+  warn_sundials_disabled=
+  if test -z "$warn_sundials_disabled"; then
+    OCTAVE_CHECK_SUNDIALS_COMPATIBLE_API
+  fi
+  if test -z "$warn_sundials_disabled"; then
+    OCTAVE_CHECK_SUNDIALS_SIZEOF_REALTYPE
+  fi
+  if test -z "$warn_sundials_disabled"; then
+    OCTAVE_CHECK_SUNDIALS_SUNLINSOL_DENSE
+  fi
+  dnl The following tests determine whether certain optional features are
+  dnl present in the SUNDIALS libraries, but will not disable using SUNDIALS.
+  if test -z "$warn_sundials_disabled"; then
+    OCTAVE_CHECK_SUNDIALS_SUNLINSOL_KLU
+  fi
+fi
 LIBS="$save_LIBS"
 
 dnl Define this way instead of with an #if in oct-conf-post.h so that
 dnl the build features script will get the correct value.
+dnl
+dnl The test on the sunlinsol_klu.h header is a bit of a kluge.
+dnl How can we do a better job here?  Do we need to disable sundials
+dnl any tests fail, or can we fix __ode15__.cc so that it still partially
+dnl works when some things are missing (for example, KLU)?
 if test -n "$SUNDIALS_IDA_LIBS" \
     && test -n "$SUNDIALS_NVECSERIAL_LIBS" \
-    && test $octave_cv_sundials_ida_dense = yes \
-    && test $octave_cv_sundials_realtype_is_double = yes; then
+    && test "x$octave_cv_sundials_sunlinsol_dense" = xyes \
+    && test "x$octave_cv_sundials_realtype_is_double" = xyes \
+    && test "x$octave_have_sundials_compatible_api" = xyes; then
   AC_DEFINE(HAVE_SUNDIALS, 1, [Define to 1 if SUNDIALS is available.])
 
   ## Collections of options needed to build with SUNDIALS and its dependencies.
-  SUNDIALS_XCPPFLAGS="$SUNDIALS_IDA_CPPFLAGS $SUNDIALS_NVECSERIAL_CPPFLAGS $KLU_CPPFLAGS"
-  SUNDIALS_XLDFLAGS="$SUNDIALS_IDA_LDFLAGS $SUNDIALS_NVECSERIAL_LDFLAGS $KLU_LDFLAGS"
-  SUNDIALS_XLIBS="$SUNDIALS_IDA_LIBS $SUNDIALS_NVECSERIAL_LIBS $KLU_LIBS"
+  SUNDIALS_XCPPFLAGS="$SUNDIALS_IDA_CPPFLAGS $SUNDIALS_SUNLINSOLKLU_CPPFLAGS $SUNDIALS_NVECSERIAL_CPPFLAGS $KLU_CPPFLAGS"
+  SUNDIALS_XLDFLAGS="$SUNDIALS_IDA_LDFLAGS $SUNDIALS_SUNLINSOLKLU_LDFLAGS $SUNDIALS_NVECSERIAL_LDFLAGS $KLU_LDFLAGS"
+  SUNDIALS_XLIBS="$SUNDIALS_IDA_LIBS $SUNDIALS_SUNLINSOLKLU_LIBS $SUNDIALS_NVECSERIAL_LIBS $KLU_LIBS"
 else
   SUNDIALS_IDA_CPPFLAGS=
   SUNDIALS_IDA_LDFLAGS=
   SUNDIALS_IDA_LIBS=
+  SUNDIALS_SUNLINSOLKLU_CPPFLAGS=
+  SUNDIALS_SUNLINSOLKLU_LDFLAGS=
+  SUNDIALS_SUNLINSOLKLU_LIBS=
   SUNDIALS_NVECSERIAL_CPPFLAGS=
   SUNDIALS_NVECSERIAL_LDFLAGS=
   SUNDIALS_NVECSERIAL_LIBS=
   SUNDIALS_XCPPFLAGS=
   SUNDIALS_XLDFLAGS=
   SUNDIALS_XLIBS=
+  dnl Emit a fallback warning message in case SUNDIALS has been disabled for
+  dnl some reason that hasn't already generated one of these known warnings.
+  if test -z "$warn_sundials_nvecserial" && test -z "$warn_sundials_ida" \
+      && test -z "$warn_sundials_disabled"; then
+    warn_sundials_disabled="SUNDIALS libraries are missing some feature.  The solvers ode15i and ode15s will be disabled."
+    OCTAVE_CONFIGURE_WARNING([warn_sundials_disabled])
+  fi
 fi
 
 AC_SUBST(SUNDIALS_XCPPFLAGS)
@@ -2594,7 +2619,7 @@
 esac
 
 GCC_EXTRA_FLAGS="-Wall -W $GCC_WSHADOW_OPTION -Wformat -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wwrite-strings -Wcast-align -Wcast-qual"
-GXX_EXTRA_FLAGS="-Wall -W $GCC_WSHADOW_OPTION -Wold-style-cast -Wformat -Wpointer-arith -Wwrite-strings -Wcast-align -Wcast-qual"
+GXX_EXTRA_FLAGS="-Wall -W $GCC_WSHADOW_OPTION -Woverloaded-virtual -Wold-style-cast -Wformat -Wpointer-arith -Wwrite-strings -Wcast-align -Wcast-qual"
 
 try_extra_warning_flags=yes
 AC_ARG_ENABLE([extra-warning-flags],
@@ -3066,6 +3091,9 @@
   SUNDIALS NVECTOR CPPFLAGS:     $SUNDIALS_NVECSERIAL_CPPFLAGS
   SUNDIALS NVECTOR LDFLAGS:      $SUNDIALS_NVECSERIAL_LDFLAGS
   SUNDIALS NVECTOR libraries:    $SUNDIALS_NVECSERIAL_LIBS
+  SUNLINSOL KLU CPPFLAGS:        $SUNDIALS_SUNLINSOLKLU_CPPFLAGS
+  SUNLINSOL KLU LDFLAGS:         $SUNDIALS_SUNLINSOLKLU_LDFLAGS
+  SUNLINSOL KLU libraries:       $SUNDIALS_SUNLINSOLKLU_LIBS
   TERM libraries:                $TERM_LIBS
   UMFPACK CPPFLAGS:              $UMFPACK_CPPFLAGS
   UMFPACK LDFLAGS:               $UMFPACK_LDFLAGS

--- a/doc/interpreter/TODO	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/TODO	Fri Jul 12 12:14:43 2019 -0400
@@ -29,7 +29,7 @@
     (???)
 
   * If Octave crashes, it now attempts to save all user-defined
-    variables in a file named `octave-core' in the current directory
+    variables in a file named 'octave-core' in the current directory
     before exiting.
     (???)
 
@@ -39,7 +39,7 @@
     that are not yet available in the public release of Info.
     (install)
 
-  * If it is present, Octave will now use an `ls-R' database file to
+  * If it is present, Octave will now use an 'ls-R' database file to
     speed up recursive path searching.  Octave looks for a file called
     ls-R in the directory specified by the environment variable
     OCTAVE_DB_DIR.  If that is not set but the environment variable

--- a/doc/interpreter/contributors.in	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/contributors.in	Fri Jul 12 12:14:43 2019 -0400
@@ -43,6 +43,7 @@
 Remy Bruno
 Clemens Buchacher
 Ansgar Burchard
+Antonius Burgers
 Marco Caliari
 Daniel Calvelo
 John C. Campbell
@@ -430,6 +431,7 @@
 Alexander Wilms
 Joe Winegarden
 Georg Wiora
+Eddy Xiao
 Sahil Yadav
 Fook Fah Yap
 Sean Young

--- a/doc/interpreter/genpropdoc.m	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/genpropdoc.m	Fri Jul 12 12:14:43 2019 -0400
@@ -503,11 +503,24 @@
 @code{screenpixelsperinch} property of the root object.";
 
       case "pointer"
-        s.doc = doc_unused;
+        s.doc = "Name of the mouse pointer shape associated with the canvas \
+of the figure.  When __prop__ is \"custom\", the shape is determined by \
+the @code{pointershapecdata} property.\n\n\
+__prop__ has no effect when the figure is in zoom, pan, or rotate mode. \
+In this case, Octave automatically uses a pointer shape appropriate \
+to the mode.";
+
       case "pointershapecdata"
-        s.doc = doc_unused;
+        s.doc ="m-by-m matrix defining a custom pointer.  Each \
+element defines a pixel with the element (1,1) representing the \
+top-left pixel.  A value of 1 is colored black, a value of 2 is colored white, \
+and all other values are rendered as transparent.";
+        s.valid = "16-by-16 or 32-by-32 Matrix";
+
       case "pointershapehotspot"
-        s.doc = doc_unused;
+        s.doc ="For custom pointers only __prop__ defines the row and column \
+of the pixel in @code{pointershapecdata} that is used as the pointer location.";
+        s.valid = valid_2elvec;
 
       case "position"
         s.doc = "Specify the position and size of the figure canvas.  \
@@ -536,7 +549,19 @@
         s.valid = valid_fcn;
 
       case "selectiontype"
-        ## FIXME: docstring explaining what "{normal}|open|alt|extend" mean.
+        s.doc = "Selection type of the latest mouse click.\n\n\
+__prop__ may take different values depending on the combination of mouse \
+button and keyboard modifier that were used:\n\
+@table @code\n\
+@item normal:\n\
+Left-click.\n\
+@item alt:\n\
+Right-click or Ctrl+Left-click.\n\
+@item extend:\n\
+Shitf+Left-click, Middle click, or combined Left-click and Right-click.\n\
+@item open:\n\
+Double Left-click.\n\
+@end table";
 
       case "sizechangedfcn"
         s.doc = "Callback triggered when the figure window size is changed.\
@@ -581,7 +606,21 @@
         s.valid = valid_fcn;
 
       case "windowscrollwheelfcn"
-        s.doc = doc_unused;
+        s.doc = "Function that is executed when a user manipulates \
+the mouse wheel over this figure.  \
+The function is called with two input arguments.  The first \
+argument holds the handle of the calling figure.  The second argument holds \
+an event structure which has the following members:\n\
+@table @code\n\
+@item VerticalScrollCount:\n\
+The number of wheel steps, typically 1 when scrolling down and -1 when \
+scrolling up.\n\
+@item VerticalScrollAmount:\n\
+The number of lines a wheel step should scroll.  This value is always 3.\n\
+@item EventName:\n\
+The event name which is \"WindowScrollWheel\".\n\
+@end table\
+\n\n__fcnmsg__";
         s.valid = valid_fcn;
 
       case "windowstyle"
@@ -696,12 +735,12 @@
         s.doc = doc_fontsize;
         s.valid = "scalar";
 
+      case "fontsmoothing"
+        s.doc = "Control whether any text associated with __objname__ is anti-aliased.";
+
       case "fontunits"
         s.doc = doc_fontunits;
 
-      case "fontsmoothing"
-        s.doc = doc_unused;
-
       case "fontweight"
         s.doc = doc_fontweight;
 
@@ -1082,6 +1121,9 @@
         s.doc = doc_fontname;
         s.valid = valid_string;
 
+      case "fontsmoothing"
+        s.doc = "Control whether anti-aliasing is used when rendering text.";
+
       case "fontsize"
         s.doc = doc_fontsize;
         s.valid = "scalar";

--- a/doc/interpreter/macros.texi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/macros.texi	Fri Jul 12 12:14:43 2019 -0400
@@ -46,9 +46,14 @@
 @c Implementation Note:
 @c For TeX, @vskip produces a nice separation.
 @c For Texinfo, '@sp 1' should work, but in practice produces ugly results
-@c for HTML.  We use a simple blank line to produce the correct behavior.
+@c for HTML.  We use a simple blank line to produce the correct
+@c behavior.
+@c
+@c We use @xseealso now because Texinfo introduced its own @seealso
+@c command.  But instead of modifying all source files, we'll have the
+@c munge-texi script convert @seealso to @xseealso.
 
-@macro seealso {args}
+@macro xseealso {args}
 @iftex
 @vskip 2pt
 @end iftex

--- a/doc/interpreter/mk-doc-cache.pl	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/mk-doc-cache.pl	Fri Jul 12 12:14:43 2019 -0400
@@ -71,6 +71,8 @@
           next if $in_header;
           next if $line =~ /$tex_delim_pat/;
 
+          $line =~ s/\@seealso/\@xseealso/g;
+
           ## escape {}@ characters for texinfo
           $line =~ s/([{}\@])/\@$1/g
             if $line =~ m/^$doc_delim/;

--- a/doc/interpreter/munge-texi.pl	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/munge-texi.pl	Fri Jul 12 12:14:43 2019 -0400
@@ -73,6 +73,8 @@
 
 TXI_LINE: while (<STDIN>)
 {
+  s/\@seealso/\@xseealso/g;
+
   if (/^\s*\@DOCSTRING\((\S+)\)/)
   {
     $func = $1;
@@ -139,7 +141,9 @@
         $repl .= "\@ref{XREF$node,,$func}, ";
       }
       substr($repl,-2) = "";   # Remove last ', '
-      $_ = "\@seealso{$repl}$rest_of_line";
+      # write out @xseealso because we have our own macro that conflicts
+      # with the one introduced in Texinfo 6.
+      $_ = "\@xseealso{$repl}$rest_of_line";
     }
 
     $docstring .= $_;

--- a/doc/interpreter/oop.txi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/oop.txi	Fri Jul 12 12:14:43 2019 -0400
@@ -900,6 +900,8 @@
 By default, in the example @var{prop4}, properties are not constant and have
 public read and write access.
 
+@DOCSTRING(properties)
+
 @node Methods
 @subsection Methods
 

--- a/doc/interpreter/plot.txi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/plot.txi	Fri Jul 12 12:14:43 2019 -0400
@@ -459,6 +459,8 @@
 
 @DOCSTRING(camlight)
 
+@DOCSTRING(lightangle)
+
 @DOCSTRING(meshgrid)
 
 @DOCSTRING(ndgrid)

--- a/doc/interpreter/strings.txi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/strings.txi	Fri Jul 12 12:14:43 2019 -0400
@@ -248,7 +248,12 @@
 the overhead of a function call and the input validation of the associated
 function.
 
-Nevertheless, there are several other functions for concatenating string
+The @code{newline} function can be used to join strings such that they appear
+as multiple lines of text when displayed.
+
+@DOCSTRING(newline)
+
+In addition, there are several other functions for concatenating string
 objects which can be useful in specific circumstances: @code{char},
 @code{strvcat}, @code{strcat}, and @code{cstrcat}.  Finally, the general
 purpose concatenation functions can be used: see @ref{XREFcat,,cat},

--- a/doc/interpreter/system.txi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/system.txi	Fri Jul 12 12:14:43 2019 -0400
@@ -533,6 +533,8 @@
 
 @DOCSTRING(compare_versions)
 
+@DOCSTRING(verLessThan)
+
 @DOCSTRING(license)
 
 @DOCSTRING(getrusage)

--- a/doc/interpreter/testfun.txi	Wed Jul 10 20:02:44 2019 -0700
+++ b/doc/interpreter/testfun.txi	Fri Jul 12 12:14:43 2019 -0400
@@ -470,8 +470,8 @@
 
 @DOCSTRING(example)
 
+@DOCSTRING(oruntests)
+
 @DOCSTRING(rundemos)
 
-@DOCSTRING(runtests)
-
 @DOCSTRING(speed)

--- a/etc/HACKING.md	Wed Jul 10 20:02:44 2019 -0700
+++ b/etc/HACKING.md	Fri Jul 12 12:14:43 2019 -0400
@@ -343,7 +343,7 @@
 
 The rules for updating these version numbers are:
 
-  * Start with version information of ‘0:0:0’ for each libtool library.
+  * Start with version information of `0:0:0` for each libtool library.
 
   * Update the version information only immediately before a public
     release of your software.  More frequent updates are unnecessary,
@@ -351,7 +351,7 @@
     faster.
 
   * If the library source code has changed at all since the last update,
-    then increment revision (‘c:r:a’ becomes ‘c:r+1:a’).
+    then increment revision (`c:r:a` becomes `c:r+1:a`).
 
   * If any interfaces have been added, removed, or changed since the
     last update, increment current, and set revision to 0.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/etc/NEWS.5	Fri Jul 12 12:14:43 2019 -0400
@@ -0,0 +1,324 @@
+Summary of important user-visible changes for version 5 (2019-02-23):
+--------------------------------------------------------------------
+
+### General improvements
+
+- The Octave plotting system now supports high resolution screens,
+  i.e., those with greater than 96 DPI which are referred to as
+  HiDPI/Retina monitors.
+
+- Unicode character support for files and folders in Windows.
+
+- A new core function `movfun` will apply a function to a sliding
+  window of arbitrary size on a dataset and accumulate the results.
+  Many common cases have been implemented using the naming
+  scheme `movXXX` where `XXX` is the function that will be applied.
+  For example, the moving average over a dataset is `movmean`.
+  New moving window functions:
+
+  `movfun`  `movslice`
+  `movmad`  `movmax`   `movmean`  `movmedian`  `movmin`  `movprod`
+  `movstd`  `movsum`   `movvar`
+
+- The `fsolve` function has been tweaked to use larger step sizes when
+  calculating the Jacobian of a function with finite differences.
+  This leads to faster convergence.
+
+- The `ranks` function has been recoded for performance and is now 25X
+  faster.  In addition, it now supports a third argument that specifies
+  how to resolve the ranking of tie values.
+
+- The function `randi` has been recoded to produce an unbiased (all
+  results are equally likely) sample of integers.  This may produce
+  different results in existing code.  If it is necessary to reproduce
+  the exact random integer sequence as in previous versions use
+
+  `ri = imin + floor ((imax - imin + 1) * rand ());`
+
+- The function `isdefinite` now returns `true` or `false` rather than
+  `-1`, `0`, or `1`.  To test for a positive semi-definite matrix (old
+  output of `0`) check whether the following two conditions hold:
+
+    `isdefinite (A) => 0`  and  `isdefinite (A + 5*TOL, TOL) => 1`
+
+- The `intmax`, `intmin`, and `flintmax` functions now accept a variable
+  as input.  Existing code to query the range of an existing variable can
+  be simplified by removing the call to `class` that was previously
+  required.  For example defining the variable `x = int8 (3)` in the
+  workspace, calls like
+
+    `range = [ intmin(class(x)), intmax(class(x)) ]`
+
+  can in Octave 5 be simplified to `range = [ intmin(x), intmax(x) ]`.
+
+- The path handling functions no longer perform variable or brace
+  expansion on path elements and Octave's load-path is no longer
+  subject to these expansions.
+
+- A new printing device is available, `"-ddumb"`, which produces ASCII
+  art for plots.  This device is only available with the gnuplot toolkit.
+
+- The `msgbox` function has changed in two respects: the default WindowStyle
+  is now `"non-modal"`, and the default interpreter for the message is now
+  `"tex"`.  Both WindowStyle and Interpreter can be controlled by passing an
+  option struct argument.
+
+### Dependencies
+
+- The GUI requires Qt libraries.  The minimum Qt4 version supported is
+  Qt4.8.  Qt5 of any version is preferred.
+
+- The OSMesa library is no longer used.  To print invisible figures
+  when using OpenGL graphics, the Qt `QOFFSCREENSURFACE` feature must be
+  available and you must use the qt graphics toolkit.
+
+- The FFTW library is now required to perform FFT calculations.
+  The FFTPACK sources have been removed from Octave.
+
+
+### Matlab compatibility
+
+- The determination of an object's dimensions, size, and shape by the
+  functions `ndims`, `rows`, `columns`, `isscalar`, `isvector`,
+  `isrow`, `iscolumn`, `ismatrix`, and `issquare` now fully depends
+  on the function size.  Thus, any user-defined object can ensure correct
+  treatment by the aforementioned functions by properly overloading the
+  `size` function.
+
+- The functions `issymmetric` and `ishermitian` accept an option
+  `"nonskew"` or `"skew"` to calculate the symmetric or skew-symmetric
+  property of a matrix.  Performance has also been increased.
+
+- The `issorted` function now uses a direction option of `"ascend"`
+  or `"descend"`.  Change all uses of `"ascending"` and `"descending"`
+  in existing code to the new options.
+
+- The `strncmp` and `strncmpi` functions now return `true` if the two
+  input strings match, even though the number of characters specified
+  by `n` exceeds the string length.  For Example:
+
+    `strncmp ("abc", "abc", 100)`
+
+  returns `true` in Octave 5 and `false` in older versions of Octave.
+
+- The `str2func` function no longer accepts a second `"global"` argument.
+  This argument was typically used to allow functions that accept
+  function names as arguments to avoid conflicts with subfunctions or
+  nested functions.  Instead, it's best to avoid this situation
+  entirely and require users to pass function handles rather than
+  function names.
+
+- Using `clear` with no arguments now removes only local variables
+  from the current workspace.  Global variables will no longer be
+  visible, but they continue to exist in the global workspace and
+  possibly other workspaces such as the base workspace.
+
+
+#### Nonlinear Equations
+
+Several default solver options have been changed to be Matlab compatible.
+This *may* result in existing code producing different results.
+
+- `fsolve`
+
+  Option         |   New Default    | Old Default
+  ---------------|------------------|-------------
+  `FinDiffType`  |    `"forward"`   |  `"central"`
+  `MaxFunEvals`  | `100*length(x0)` |    `Inf`
+  `TolFun`       |     `1e-6`       |    `1e-7`
+  `TolX`         |     `1e-6`       |    `1e-7`
+  `Updating`     |     `"off"`      |    `"on"`
+
+- `fminsearch`
+
+  Option   | New Default | Old Default
+  ---------|-------------|------------
+  `TolFun` |   `1e-7`    |   `1e-4`
+
+- `fminbnd`
+
+  Option         | New Default | Old Default
+  ---------------|-------------|------------
+  `MaxFunEvals`  |     `500`   |   `Inf`
+  `MaxIter`      |     `500`   |   `Inf`
+  `TolX`         |    `1e-4`   |   `1e-8`
+
+- `fminunc`
+
+  Option         |   New Default    | Old Default
+  ---------------|------------------|------------
+  `FinDiffType`  |   `"forward"`    | `"central"`
+  `MaxFunEvals`  | `100*length(x0)` |   `Inf`
+  `TolX`         |     `1e-6`       |   `1e-7`
+  `TolFun`       |     `1e-6`       |   `1e-7`
+
+
+#### Graphic objects
+
+- Figure graphic objects have a new property `"Number"` which is
+  read-only and will return the handle (number) of the figure.
+  However, if the property `"IntegerHandle"` has been set to `"off"`
+  then the property will return an empty matrix `[]`.
+
+- Patch and surface graphic objects now use the `"FaceNormals"` property
+  for flat lighting.
+
+- `"FaceNormals"` and `"VertexNormals"` for patch and surface graphic
+  objects are now calculated only when necessary to improve graphics
+  performance.  In order for any normals to be calculated the
+  `"FaceLighting"` property must be set to `"flat"` (FaceNormals) or
+  `"gouraud"` (VertexNormals), **and** a light object must be present
+  in the axes.
+
+- The `"Margin"` property of `text`-objects has a new default of `3`
+  rather than `2`.
+
+- Printing to raster formats (bitmaps like PNG or JPEG) now uses an
+  OpenGL-based method by default.  The print options `"-opengl"`
+  (raster) and `"-painters"` (vector) have been added ("qt" toolkit
+  only).  The figure property `"renderer"` specifies which renderer to
+  use.  When the property `"renderermode"` is `"auto"` Octave will select
+  `"-opengl"` for a raster output format and `"-painters"` for a vector
+  output format.
+
+- A new print option `"-RGBImage"` has been added which captures the
+  pixels of a figure as an image.  This is similar to screen capture
+  tools, except that print formatting options can be used to, for
+  example, change the resolution or display the image in black and
+  white.
+
+- Two new print options for page-based formats (PDF, PostScript) have
+  been added.  The `"-fillpage"` option will stretch the plot to occupy
+  the entire page with 0.25 inch margins all around.  The `"-bestfit"`
+  option will expand the plot to take up as much room as possible on
+  the page without distorting the original aspect ratio of the plot.
+
+- Printing using the `"-dtiff"` output device will now create compressed
+  images using LZW compression.  To produce uncompressed images use the
+  `"-dtiffn"` device.
+
+
+### Legacy functions
+
+The following functions have been declared legacy functions which
+means they are obsolete and should not be used in any new code.
+Unlike deprecated functions, however, their removal from Octave has
+not yet been scheduled.
+
+  Function               | Replacement
+  -----------------------|------------------
+  `findstr`              | `strfind`
+  `flipdim`              | `flip`
+  `isdir`                | `isfolder` or `dir_in_loadpath`
+  `isequalwithequalnans` | `isequaln`
+  `isstr`                | `ischar`
+  `setstr`               | `char`
+  `strmatch`             | `strncmp` or `strcmp`
+  `strread`              | `textscan`
+  `textread`             | `textscan`
+
+
+### Deprecated functions and properties
+
+The following functions and graphics properties have been deprecated
+in Octave 5 and will be removed from Octave 7 (or whatever version
+is the second major release after 5):
+
+- Functions
+
+  Function                 | Replacement
+  -------------------------|-------------------
+  `output_max_field_width` | `output_precision`
+  `is_keyword`             | `iskeyword`
+
+- Graphics properties
+
+  Object           | Property      | Value
+  -----------------|---------------|------------
+  `text`           | `fontangle`   | `"oblique"`
+  `uibuttongroup`  | `fontangle`   | `"oblique"`
+  `uicontrol`      | `fontangle`   | `"oblique"`
+  `uipanel`        | `fontangle`   | `"oblique"`
+  `uitable`        | `fontangle`   | `"oblique"`
+
+- Specifying `legend` position with a numeric argument is deprecated.
+  Use a string argument instead.
+
+- The environment variable used by `mkoctfile` for linker flags is now
+  `LDFLAGS` rather than `LFLAGS`.  `LFLAGS` is deprecated, and a warning
+  is emitted if is used, but it will continue to work.
+
+
+### Removed functions and properties
+
+The following functions and properties were deprecated in Octave 4.2
+and have been removed from Octave 5.
+
+- Functions
+
+  Function               | Replacement
+  -----------------------|------------------
+  `bitmax`               | `flintmax`
+  `mahalanobis`          | `mahal` in Octave Forge statistics pkg
+  `md5sum`               | `hash`
+  `octave_config_info`   | `__octave_config_info__`
+  `onenormest`           | `normest1`
+  `sleep`                | `pause`
+  `usleep`               | `pause`
+  `wavread`              | `audioread`
+  `wavwrite`             | `audiowrite`
+
+- Properties
+
+  Object      | Property          | Value
+  ------------|-------------------|---------
+  `axes`      | `xaxislocation`   | `"zero"`
+              | `yaxislocation`   | `"zero"`
+  `hggroup`   | `erasemode`       |
+  `image`     | `erasemode`       |
+  `line`      | `erasemode`       |
+  `patch`     | `erasemode`       |
+  `patch`     | `normalmode`      |
+  `surface`   | `erasemode`       |
+  `surface`   | `normalmode`      |
+  `text`      | `erasemode`       |
+
+
+### Alphabetical list of new functions added in 5
+
+- `clearvars`
+- `isfile`
+- `isfolder`
+- `matlab.lang.makeUniqueStrings`
+- `matlab.lang.makeValidName`
+- `movegui`
+- `movfun`
+- `movie`
+- `movmad`
+- `movmax`
+- `movmean`
+- `movmedian`
+- `movmin`
+- `movprod`
+- `movslice`
+- `movstd`
+- `movsum`
+- `movvar`
+- `openfig`
+- `ordeig`
+- `savefig`
+- `uitable`
+
+
+### Old release news
+
+- [Octave 4.4.x](etc/NEWS.4)
+- [Octave 4.2.x](etc/NEWS.4)
+- [Octave 4.0.x](etc/NEWS.4)
+- [Octave 3.8.x](etc/NEWS.3)
+- [Octave 3.6.x](etc/NEWS.3)
+- [Octave 3.4.x](etc/NEWS.3)
+- [Octave 3.2.x](etc/NEWS.3)
+- [Octave 3.0.x](etc/NEWS.3)
+- [Octave 2.x](etc/NEWS.2)
+- [Octave 1.x](etc/NEWS.1)