octave: add missing dependencies

+ move to qt5
+ enable octave's editor via qscintilla-qt5 (it was missing!)
+ provide support for solving linear programs via glpk
+ provide support for audio file handling
+ provide support for openGL->ghostscript printing via gl2ps
+ provide option for large arrays (but needs 64bit BLAS)

+ add gui launcher script, see: https://savannah.gnu.org/bugs/?53034

https://www.gnu.org/software/octave/doc/interpreter/External-Packages.html#External-Packages

common/shlibs

@@ -3118,3 +3118,6 @@ libdazzle-1.0.so.0 libdazzle-3.28.0_1
 libjsonrpc-glib-1.0.so.1 jsonrpc-glib-3.28.0_1
 libtemplate_glib-1.0.so.0 template-glib-3.28.0_1
 libeog.so eog-3.28.0_4
+liboctave.so.4 octave-4.2.1_8
+liboctinterp.so.4 octave-4.2.1_8
+liboctgui.so.2 octave-4.2.1_8

srcpkgs/octave/patches/01-qscintilla.patch

@@ -0,0 +1,14 @@
+# reason: configure looks for the wrong filename
+# note: should be fixed in the next release
+
+--- configure
++++ configure
+@@ -34701,7 +34701,7 @@
+     ;;
+     5)
+       QT_MODULES="Qt5Core Qt5Gui Qt5Network Qt5OpenGL Qt5PrintSupport"
+-      octave_qscintilla_libnames="qscintilla2-qt5 qt5scintilla2"
++      octave_qscintilla_libnames="qscintilla2-qt5 qt5scintilla2 qscintilla2_qt5"
+     ;;
+     *)
+       as_fn_error $? "Unrecognized Qt version $qt_version" "$LINENO" 5

srcpkgs/octave/template

@@ -1,12 +1,13 @@
 # Template file for 'octave'
 pkgname=octave
 version=4.2.1
-revision=7
+revision=8
 build_style=gnu-configure
-configure_args=" --with-blas=openblas --with-lapack=openblas "
+configure_args=" --with-blas=openblas --with-lapack=openblas
+ $(vopt_if largearrays --enable-64)"
 hostmakedepends="perl gcc-fortran pkg-config gnuplot"
 makedepends="pcre-devel openblas-devel readline-devel libSM-devel libltdl-devel
- lcms2-devel"
+ lcms2-devel glpk-devel"
 short_desc="A high-level language, primarily intended for numerical computations"
 maintainer="Diogo Leal <diogo@diogoleal.com>"
 license="GPL-3"
@@ -15,15 +16,18 @@ distfiles="${GNU_SITE}/octave/octave-${version}.tar.gz"
 checksum=80c28f6398576b50faca0e602defb9598d6f7308b0903724442c2a35a605333b
 
 # Package build options
-# TODO: some options are still missing, such as java
+# TODO: some options are still missing, such as
+# java, qrupdate, suitesparse
 build_options="
 	arpack
+	audio
 	curl
 	fftw3
 	graphicsmagick
 	gui
 	hdf5
 	imagemagick
+	largearrays
 	opengl
 	openmp
 	qhull
@@ -33,18 +37,21 @@ build_options="
 vopt_conflict graphicsmagick imagemagick
 
 desc_option_arpack="Provides 'eigs' and 'svds' functions."
+desc_option_audio="Provides audiofile related functionality."
 desc_option_curl="Provides 'urlread' and 'urlwrite' functions and the 'ftp' class."
 desc_option_fftw3="Improves performance on discrete Fourier transforms."
 desc_option_gui="Graphical User Interface."
 desc_option_graphicsmagick="Provides 'imread' and 'imwrite' functions."
 desc_option_hdf5="Support for HDF data files."
 desc_option_imagemagick="Provides 'imread' and 'imwrite' functions."
+desc_option_largearrays="Enable large array (64bit pointers)." #req. 64bit BLAS
 desc_option_qhull="Provides 'convhull{,n}', 'delaunay{,n}' and 'voronoi{,n}' functions."
 desc_option_openmp="Enable support for OpenMP SMP multi-threading"
 desc_option_zlib="Support for compressed data."
 
 build_options_default="
 	arpack
+	audio
 	curl
 	fftw3
 	graphicsmagick
@@ -58,13 +65,14 @@ build_options_default="
 
 makedepends+="
 	$(vopt_if arpack arpack-ng-devel)
+	$(vopt_if audio 'libsndfile-devel portaudio-devel')
 	$(vopt_if curl libcurl-devel)
 	$(vopt_if fftw3 fftw-devel)
 	$(vopt_if graphicsmagick libgraphicsmagick-devel)
-	$(vopt_if gui qt-devel)
+	$(vopt_if gui 'qt5-devel qscintilla-qt5-devel')
 	$(vopt_if hdf5 hdf5-devel)
 	$(vopt_if imagemagick libmagick-devel)
-	$(vopt_if opengl "glu-devel fltk-devel fontconfig-devel freetype-devel")
+	$(vopt_if opengl "glu-devel fltk-devel fontconfig-devel freetype-devel gl2ps-devel")
 	$(vopt_if openmp libgomp-devel)
 	$(vopt_if qhull libqhull-devel)
 	$(vopt_if zlib zlib-devel)
@@ -73,8 +81,15 @@ makedepends+="
 pre_build() {
 	chmod +x build-aux/mk-opts.pl
 }
+
 post_build() {
 	# Remove references to hardening -specs.
 	sed -e "s|\(-specs=.*hardened-ld\)||g" -e "s|\(-specs=.*hardened-cc1\)||g" \
 		-i src/mkoctfile.cc libinterp/build-env.cc
 }
+
+post_install() {
+	# add helper to launch octave from dmenu etc.
+	printf "#!/bin/sh\noctave --force-gui" > octave-gui
+	vbin octave-gui
+}