--- a/doc/interpreter/macros.texi	Sat Dec 29 22:36:48 2018 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,112 +0,0 @@
-@c Copyright (C) 2012-2018 John W. Eaton
-@c
-@c This file is part of Octave.
-@c
-@c Octave is free software: you can redistribute it and/or modify it
-@c under the terms of the GNU General Public License as published by
-@c the Free Software Foundation, either version 3 of the License, or
-@c (at your option) any later version.
-@c
-@c Octave is distributed in the hope that it will be useful, but
-@c WITHOUT ANY WARRANTY; without even the implied warranty of
-@c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-@c GNU General Public License for more details.
-@c
-@c You should have received a copy of the GNU General Public License
-@c along with Octave; see the file COPYING.  If not, see
-@c <https://www.gnu.org/licenses/>.
-
-@c The following macro marks words that aspell should ignore during
-@c spellchecking.  Within Texinfo it has no effect as it merely replaces
-@c the macro call with the argument itself.
-
-@macro nospell {arg}
-\arg\
-@end macro
-
-@c The following macro works around the Info/plain text expansion of @code{XXX}
-@c which is `XXX'.  This looks particularly bad when the macro body is
-@c single or double-quoted text, such as a property value `"position"'
-@ifinfo
-@macro qcode{arg}
-\arg\
-@end macro
-@end ifinfo
-@ifnotinfo
-@macro qcode{arg}
-@code{\arg\}
-@end macro
-@end ifnotinfo
-
-@c The following macro is used for the on-line help system, but we don't
-@c want lots of `See also: foo, bar, and baz' strings cluttering the
-@c printed manual (that information should be in the supporting text for
-@c each group of functions and variables).
-@c
-@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.
-
-@macro seealso {args}
-@iftex
-@vskip 2pt
-@end iftex
-@ifnottex
-
-@end ifnottex
-@ifnotinfo
-@noindent
-@strong{See also:} \args\.
-@end ifnotinfo
-@ifinfo
-@noindent
-See also: \args\.
-@end ifinfo
-@end macro
-
-@c The following macro works around a situation where the Info/plain text
-@c expansion of the @code{XXX} macro is `XXX'.  The use of the apostrophe
-@c can be confusing if the code segment itself ends with a transpose operator.
-@ifinfo
-@macro tcode{arg}
-\arg\
-@end macro
-@end ifinfo
-@ifnotinfo
-@macro tcode{arg}
-@code{\arg\}
-@end macro
-@end ifnotinfo
-
-@c FIXME: someday, when Texinfo 5.X is standard, we might replace this with
-@c @backslashchar, which is a new addition to Texinfo.
-
-@macro xbackslashchar
-\\
-@end macro
-
-@c These may be useful for all, not just for octave.texi.
-@tex
-  \ifx\rgbDarkRed\thisisundefined
-    \def\rgbDarkRed{0.50 0.09 0.12}
-  \fi
-  \ifx\linkcolor\thisisundefined
-    \relax
-  \else
-    \global\def\linkcolor{\rgbDarkRed}
-  \fi
-  \ifx\urlcolor\thisisundefined
-    \relax
-  \else
-    \global\def\urlcolor{\rgbDarkRed}
-  \fi
-  \ifx\urefurlonlylinktrue\thisisundefined
-    \relax
-  \else
-    \global\urefurlonlylinktrue
-  \fi
-@end tex
-
-@c Make the apostrophe in code examples cut-and-paste friendly.
-@codequoteundirected on

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/interpreter/macros.txi	Sun Dec 30 20:02:38 2018 -0800
@@ -0,0 +1,112 @@
+@c Copyright (C) 2012-2018 John W. Eaton
+@c
+@c This file is part of Octave.
+@c
+@c Octave is free software: you can redistribute it and/or modify it
+@c under the terms of the GNU General Public License as published by
+@c the Free Software Foundation, either version 3 of the License, or
+@c (at your option) any later version.
+@c
+@c Octave is distributed in the hope that it will be useful, but
+@c WITHOUT ANY WARRANTY; without even the implied warranty of
+@c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+@c GNU General Public License for more details.
+@c
+@c You should have received a copy of the GNU General Public License
+@c along with Octave; see the file COPYING.  If not, see
+@c <https://www.gnu.org/licenses/>.
+
+@c The following macro marks words that aspell should ignore during
+@c spellchecking.  Within Texinfo it has no effect as it merely replaces
+@c the macro call with the argument itself.
+
+@macro nospell {arg}
+\arg\
+@end macro
+
+@c The following macro works around the Info/plain text expansion of @code{XXX}
+@c which is `XXX'.  This looks particularly bad when the macro body is
+@c single or double-quoted text, such as a property value `"position"'
+@ifinfo
+@macro qcode{arg}
+\arg\
+@end macro
+@end ifinfo
+@ifnotinfo
+@macro qcode{arg}
+@code{\arg\}
+@end macro
+@end ifnotinfo
+
+@c The following macro is used for the on-line help system, but we don't
+@c want lots of `See also: foo, bar, and baz' strings cluttering the
+@c printed manual (that information should be in the supporting text for
+@c each group of functions and variables).
+@c
+@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.
+
+@macro seealso {args}
+@iftex
+@vskip 2pt
+@end iftex
+@ifnottex
+
+@end ifnottex
+@ifnotinfo
+@noindent
+@strong{See also:} \args\.
+@end ifnotinfo
+@ifinfo
+@noindent
+See also: \args\.
+@end ifinfo
+@end macro
+
+@c The following macro works around a situation where the Info/plain text
+@c expansion of the @code{XXX} macro is `XXX'.  The use of the apostrophe
+@c can be confusing if the code segment itself ends with a transpose operator.
+@ifinfo
+@macro tcode{arg}
+\arg\
+@end macro
+@end ifinfo
+@ifnotinfo
+@macro tcode{arg}
+@code{\arg\}
+@end macro
+@end ifnotinfo
+
+@c FIXME: someday, when Texinfo 5.X is standard, we might replace this with
+@c @backslashchar, which is a new addition to Texinfo.
+
+@macro xbackslashchar
+\\
+@end macro
+
+@c These may be useful for all, not just for octave.texi.
+@tex
+  \ifx\rgbDarkRed\thisisundefined
+    \def\rgbDarkRed{0.50 0.09 0.12}
+  \fi
+  \ifx\linkcolor\thisisundefined
+    \relax
+  \else
+    \global\def\linkcolor{\rgbDarkRed}
+  \fi
+  \ifx\urlcolor\thisisundefined
+    \relax
+  \else
+    \global\def\urlcolor{\rgbDarkRed}
+  \fi
+  \ifx\urefurlonlylinktrue\thisisundefined
+    \relax
+  \else
+    \global\urefurlonlylinktrue
+  \fi
+@end tex
+
+@c Make the apostrophe in code examples cut-and-paste friendly.
+@codequoteundirected on

--- a/doc/interpreter/module.mk	Sat Dec 29 22:36:48 2018 -0800
+++ b/doc/interpreter/module.mk	Sun Dec 30 20:02:38 2018 -0800
@@ -142,6 +142,7 @@
   %reldir%/intro.texi \
   %reldir%/io.texi \
   %reldir%/linalg.texi \
+  %reldir%/macros.texi \
   %reldir%/matrix.texi \
   %reldir%/nonlin.texi \
   %reldir%/numbers.texi \
@@ -360,6 +361,11 @@
 
 $(MUNGED_TEXI_SRC): $(DOCSTRING_FILES)
 
+## Additional dependency through @include
+%reldir%/octave.texi: %reldir%/macros.texi
+%reldir%/install.texi: %reldir%/macros.texi
+%reldir%/bugs.texi: %reldir%/macros.texi
+
 ## These two texi files have an additional dependency through the
 ## @EXAMPLEFILE macro.
 %reldir%/oop.texi: $(examples_code_SRC)
@@ -406,7 +412,6 @@
   %reldir%/images \
   %reldir%/images.awk \
   %reldir%/images.mk \
-  %reldir%/macros.texi \
   %reldir%/mk-doc-cache.pl \
   %reldir%/mk-qthelp.pl \
   %reldir%/mkcontrib.awk \
@@ -452,7 +457,7 @@
 
 %reldir%/doc-cache: $(DOCSTRING_FILES) %reldir%/mk-doc-cache.pl | $(OCTAVE_INTERPRETER_TARGETS) %reldir%/$(octave_dirstamp)
 	$(AM_V_GEN)rm -f $@-t $@ && \
-	$(PERL) $(srcdir)/%reldir%/mk-doc-cache.pl $(srcdir) $(srcdir)/%reldir%/macros.texi $(DOCSTRING_FILES) > $@-t && \
+	$(PERL) $(srcdir)/%reldir%/mk-doc-cache.pl $(srcdir) %reldir%/macros.texi $(DOCSTRING_FILES) > $@-t && \
 	mv $@-t $@
 
 %reldir%/undocumented_list:

--- a/etc/NEWS.5	Sat Dec 29 22:36:48 2018 -0800
+++ b/etc/NEWS.5	Sun Dec 30 20:02:38 2018 -0800
@@ -167,6 +167,9 @@
  ** It is now possible to use files and folders containing Unicode
     characters in Windows.
 
+ ** The GUI requires Qt libraries.  The minimum Qt4 version supported is
+    Qt4.8.  Qt5 of any version is preferred.
+
  ** The FFTW library is now required to perform FFT calculations.
     The FFTPACK sources have been removed from Octave.
 

--- a/libgui/src/main-window.cc	Sat Dec 29 22:36:48 2018 -0800
+++ b/libgui/src/main-window.cc	Sun Dec 30 20:02:38 2018 -0800
@@ -1661,7 +1661,7 @@
   void main_window::closeEvent (QCloseEvent *e)
   {
     e->ignore ();
-    octave_cmd_exec *cmd = new octave_cmd_exec ("exit");
+    octave_cmd_builtin *cmd = new octave_cmd_builtin (&Fquit, ovl ());
     queue_cmd (cmd);
   }
 

--- a/libinterp/corefcn/load-save.h	Sat Dec 29 22:36:48 2018 -0800
+++ b/libinterp/corefcn/load-save.h	Sun Dec 30 20:02:38 2018 -0800
@@ -30,8 +30,7 @@
 
 #include "mach-info.h"
 
-class string_vector;
-class octave_value;
+#include "ovl.h"
 
 namespace octave
 {

--- a/libinterp/corefcn/oct-hist.h	Sat Dec 29 22:36:48 2018 -0800
+++ b/libinterp/corefcn/oct-hist.h	Sun Dec 30 20:02:38 2018 -0800
@@ -29,8 +29,12 @@
 
 #include "cmd-hist.h"
 
+#include "ovl.h"
+
 namespace octave
 {
+  class interpreter;
+
   class history_system
   {
   public:

--- a/libinterp/corefcn/pager.h	Sat Dec 29 22:36:48 2018 -0800
+++ b/libinterp/corefcn/pager.h	Sun Dec 30 20:02:38 2018 -0800
@@ -31,6 +31,7 @@
 #include <string>
 
 class octave_value;
+class octave_value_list;
 class oprocstream;
 
 namespace octave

--- a/libinterp/corefcn/settings.h	Sat Dec 29 22:36:48 2018 -0800
+++ b/libinterp/corefcn/settings.h	Sun Dec 30 20:02:38 2018 -0800
@@ -25,6 +25,9 @@
 
 #include "octave-config.h"
 
+#include <cstddef>
+
+class octave_value;
 class octave_value_list;
 
 namespace octave

--- a/libinterp/parse-tree/pt-tm-const.h	Sat Dec 29 22:36:48 2018 -0800
+++ b/libinterp/parse-tree/pt-tm-const.h	Sun Dec 30 20:02:38 2018 -0800
@@ -38,11 +38,11 @@
 #include "ov.h"
 #include "ovl.h"
 #include "pt-arg-list.h"
+#include "pt-mat.h"
 
 namespace octave
 {
   class tree_evaluator;
-  class tree_matrix;
 
   // Evaluate tree_matrix objects and convert them to octave_value
   // arrays (full and sparse numeric, char, cell, struct, class and

--- a/scripts/plot/draw/polar.m	Sat Dec 29 22:36:48 2018 -0800
+++ b/scripts/plot/draw/polar.m	Sun Dec 30 20:02:38 2018 -0800
@@ -334,7 +334,8 @@
   endif
 
   lprops = {"linestyle", get(hax, "gridlinestyle"), ...
-            "linewidth", get(hax, "linewidth")};
+            "linewidth", get(hax, "linewidth"), ...
+            "color", get(hax, "xcolor")};
   ## "fontunits" should be first because it affects "fontsize" property.
   tprops(1:2:12) = {"fontunits", "fontangle", "fontname", "fontsize", ...
                     "fontweight", "ticklabelinterpreter"};