Add build rule for build-octave (bug #49503). * src/build-octave.mk: Add new build rule for build-octave which can be used for cross-building binary packages that depend on Octave as a build tool. * dist-files.mk: Add new file to list. * index.html: Add new package to list. * src/of-communications.mk, src/of-image.mk, src/of-mapping.mk, src/of-optiminterp.mk, src/of-sparsersb.mk, src/of-statistics.mk, src/of-windows.mk: Add optional dependency on build-octave. * configure.ac: Add new configure switch "--disable-system-octave" that is needed to build the build-octave package. * Makefile.in: Add variable "USE_SYSTEM_OCTAVE". Exclude build-octave from the default build tools and build it only if a package explicitly depends on it. Display warning about missing native Octave version only if necessary.

diff -ur libxkbcommon-xkbcommon-0.8.3.orig/autogen.sh libxkbcommon-xkbcommon-0.8.3/autogen.sh
--- libxkbcommon-xkbcommon-0.8.3.orig/autogen.sh	2019-02-15 10:00:40.949112324 -0500
+++ libxkbcommon-xkbcommon-0.8.3/autogen.sh	2019-02-15 10:02:53.100233678 -0500
@@ -6,7 +6,7 @@
 ORIGDIR=`pwd`
 cd "$srcdir"
 
-autoreconf --verbose --install --force --warnings=all
+autoreconf -I m4 --verbose --install --force --warnings=all
 cd "$ORIGDIR"
 
 if test -z "$NOCONFIGURE"; then
Only in libxkbcommon-xkbcommon-0.8.3.orig: .autogen.sh.swp