D7: editor multi-cursor support

Add secondary_cursors field to Editor with insert_char_multi,
delete_back_multi, delete_forward_multi methods. Right-to-left
processing ensures position shifts don't corrupt earlier insertions.

7 new tests: add/clear, all_positions, insert, delete_back,
delete_forward, unicode, duplicate-add.

local/recipes/tools/diffutils/source/src/Makefile.am

@@ -0,0 +1,80 @@
+# Automakefile for GNU diffutils programs.
+
+# Copyright (C) 2001-2002, 2006, 2009-2013, 2015-2017 Free Software Foundation,
+# Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+bin_PROGRAMS = cmp diff diff3 sdiff
+
+localedir = $(datadir)/locale
+
+AM_CPPFLAGS = -I../lib -I$(top_srcdir)/lib
+AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS)
+
+LDADD = \
+  libver.a \
+  ../lib/libdiffutils.a \
+  $(LIBCSTACK) \
+  $(LIBINTL) \
+  $(LIBICONV) \
+  $(LIBSIGSEGV) \
+  $(LIB_CLOCK_GETTIME)
+
+diff_LDADD = $(LDADD)
+cmp_LDADD = $(LDADD)
+sdiff_LDADD = $(LDADD)
+diff3_LDADD = $(LDADD)
+
+cmp_SOURCES = cmp.c
+diff3_SOURCES = diff3.c
+sdiff_SOURCES = sdiff.c
+diff_SOURCES = \
+  analyze.c context.c diff.c dir.c ed.c ifdef.c io.c \
+  normal.c side.c util.c
+noinst_HEADERS =	\
+  die.h			\
+  diff.h		\
+  system.h
+
+MOSTLYCLEANFILES = paths.h paths.ht
+
+cmp.$(OBJEXT) diff3.$(OBJEXT) diff.$(OBJEXT) sdiff.$(OBJEXT): paths.h
+
+gdiff = `echo diff|sed '$(transform)'`
+BUILT_SOURCES = paths.h
+paths.h: Makefile.am
+	$(AM_V_GEN)(echo '#define DEFAULT_DIFF_PROGRAM "'$(gdiff)'"' && \
+	  echo '#define LOCALEDIR "$(localedir)"') >$@t && mv $@t $@
+
+noinst_LIBRARIES = libver.a
+nodist_libver_a_SOURCES = version.c version.h
+
+BUILT_SOURCES += version.c
+version.c: Makefile
+	$(AM_V_GEN)rm -f $@
+	$(AM_V_at)printf '#include <config.h>\n' > $@t
+	$(AM_V_at)printf 'char const *Version = "$(PACKAGE_VERSION)";\n' >> $@t
+	$(AM_V_at)chmod a-w $@t
+	$(AM_V_at)mv $@t $@
+
+BUILT_SOURCES += version.h
+version.h: Makefile
+	$(AM_V_GEN)rm -f $@
+	$(AM_V_at)printf 'extern char const *Version;\n' > $@t
+	$(AM_V_at)chmod a-w $@t
+	$(AM_V_at)mv $@t $@
+
+DISTCLEANFILES = version.c version.h
+MAINTAINERCLEANFILES = $(BUILT_SOURCES)