Add qt6 usage to mxe-octave * src/qt6-qtbase-1-fixes.patch, src/qt6-qtbase.mk, src/qt6-qtimageformats-1-fixes.patch, src/qt6-qtimageformats.mk, src/qt6-qtsvg.mk, src/qt6-qttools.mk, src/qt6-qttranslations.mk, src/qt6.mk, src/qt6-qt5compat.mk: new files * Makefile.in: add use of ENABLE_QT and add qt6 values * configure.ac: add --enable-qt=xxx option, remove--enable-qt5 * dist-files.mk, index.html: add refs to new files * src/blas_switch.mk, src/gnuplot.mk, src/opengl_switch.mk, src/default-octave.mk, src/qscintilla.mk, src/release-octave.mk, src/stable-octave.mk: add prrocessing of ENABLE_QT value * src/qt5.mk: dont include qt6* files in dependancies * src/gnuplot-2-qt6.patch: new patch file * binary-dist-rules.mk: include qtversion in build of octave-launch * installer-files/octave-firsttime.vbs, installer-files/octave-launch.c installer-files/octave.bat, installer-files/octave.vbs : include qt6 file paths

# This file is part of MXE.
# See index.html for further information.

PKG             := qt5
$(PKG)_VERSION   = $(qtbase_VERSION)
$(PKG)_DEPS     := $(patsubst $(TOP_DIR)/src/%.mk,%,\
                        $(shell grep -l 'qtbase_VERSION' \
                                $(TOP_DIR)/src/qt[^6]*.mk \
                                --exclude '$(TOP_DIR)/src/qt5.mk'))
$(PKG)_FILE      =
$(PKG)_URL       =
$(PKG)_CHECKSUM := #No checksum

define $(PKG)_UPDATE
    echo 'Warning: Updates are temporarily disabled for package $(PKG).' >&2;
    echo $($(PKG)_VERSION)
endef