Move readline to the readline/readline subdirectory

readline turns out to be a bit of a stumbling block for the project to
move gdbsupport (and then gdbserver) to the top-level.

The issue is that readline headers are intended to be included with
names like "readline/readline.h".  To support this, gdb effectively
adds a -I option pointing to the top-level source directory -- but,
importantly, this option is not used when the system readline is used.

For gdbsupport, a -I option like this would always be needed, but that
in turn would break the system readline case.  This was PR build/17077,
fixed in commit a8a5dbcab8df0b3a9e04745d4fe8d64740acb323.

Previously, we had discussed this on the gdb-patches list in terms of
removing readline from the tree

    https://sourceware.org/ml/gdb-patches/2019-09/msg00317.html

However, Eli expressed some concerns, and Joel did as well (off-list).

Given those concerns, and the fact that a patch-free local readline is
relatively new in gdb (it was locally patched for years), I changed my
mind and decided to handle this situation by moving the readline
sources down a level.

That is, upstream readline is now in readline/readline, and the
top-level readline directory just contains the minimal configury
needed to build that.

This fixes the problem because, when gdb unconditionally adds a
-I$(top_srcdir), this will not find readline headers.  A separate -I
will be needed instead, which is exactly what's needed for
--with-system-readline.

gdb/ChangeLog
2019-10-23  Tom Tromey  <tom@tromey.com>

	* Makefile.in (READLINE_DIR): Update.

gdb/doc/ChangeLog
2019-10-23  Tom Tromey  <tom@tromey.com>

	* Makefile.in (READLINE_DIR): Update.

readline/ChangeLog
2019-10-23  Tom Tromey  <tom@tromey.com>

	Move old contents to readline/ subdirectory.
	* aclocal.m4, configure, configure.ac, .gitignore, Makefile.am,
	Makefile.in, README: New files.

Change-Id: Ice156a2ee09ea68722b48f64d97146d7428ea9e4

1 files changed, 0 insertions, 271 deletions

diff --git a/readline/doc/Makefile.in b/readline/doc/Makefile.in
deleted file mode 100644
index a38bc9e..0000000
--- a/readline/doc/Makefile.in
+++ /dev/null
@@ -1,271 +0,0 @@
-# This makefile for Readline library documentation is in -*- text -*- mode.
-# Emacs likes it that way.
-
-# Copyright (C) 1996-2009 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/>.
-
-PACKAGE_TARNAME = @PACKAGE_TARNAME@
-
-topdir = @top_srcdir@
-srcdir = @srcdir@
-VPATH = @srcdir@
-
-prefix = @prefix@
-
-datarootdir = @datarootdir@
-
-docdir = @docdir@
-infodir = @infodir@
-
-mandir = @mandir@
-manpfx = man
-
-man1ext = .1
-man1dir = $(mandir)/$(manpfx)1
-man3ext = .3
-man3dir = $(mandir)/$(manpfx)3
-
-# set this to a value to have the HTML documentation installed
-htmldir =
-
-# Support an alternate destination root directory for package building
-DESTDIR =
-
-SHELL = @MAKE_SHELL@
-RM = rm -f
-
-INSTALL = @INSTALL@
-INSTALL_DATA = @INSTALL_DATA@
-
-BUILD_DIR = @BUILD_DIR@
-TEXINPUTDIR = $(srcdir)
-
-MAKEINFO    = LANGUAGE= makeinfo
-TEXI2DVI    = $(srcdir)/texi2dvi
-TEXI2HTML   = $(srcdir)/texi2html
-QUIETPS     = #set this to -q to shut up dvips
-PAPERSIZE   = letter
-PSDPI       = 600
-DVIPS       = dvips -D ${PSDPI} $(QUIETPS) -t ${PAPERSIZE} -o $@     # tricky
-# experimental; uses external texi2dvi for now; this needs pdftex to be present
-TEXI2PDF    = texi2dvi --pdf
-
-# These tools might not be available; they're not required
-DVIPDF      = dvipdfm -o $@ -p ${PAPERSIZE}
-PSPDF       = gs -sPAPERSIZE=${PAPERSIZE} -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -sOutputFile=$@
-
-RLSRC = $(srcdir)/rlman.texi $(srcdir)/rluser.texi \
-	$(srcdir)/rltech.texi $(srcdir)/version.texi \
-	$(srcdir)/rluserman.texi $(srcdir)/fdl.texi
-HISTSRC = $(srcdir)/history.texi $(srcdir)/hsuser.texi \
-	  $(srcdir)/hstech.texi $(srcdir)/version.texi $(srcdir)/fdl.texi
-
-# This should be a program that converts troff to an ascii-readable format
-NROFF       = groff -Tascii
-
-# This should be a program that converts troff to postscript
-GROFF       = groff
-
-DVIOBJ = readline.dvi history.dvi rluserman.dvi
-INFOOBJ = readline.info history.info rluserman.info
-PSOBJ = readline.ps history.ps rluserman.ps readline_3.ps history_3.ps
-HTMLOBJ = readline.html history.html rluserman.html
-TEXTOBJ = readline.0 history.0
-PDFOBJ = readline.pdf history.pdf rluserman.pdf
-
-INTERMEDIATE_OBJ = rlman.dvi
-
-DIST_DOCS = $(DVIOBJ) $(PSOBJ) $(HTMLOBJ) $(INFOOBJ) $(TEXTOBJ) $(PDFOBJ)
-
-.SUFFIXES:      .0 .3 .ps .txt .dvi .html .pdf
-
-.3.0:
-	$(RM) $@
-	-${NROFF} -man $< > $@
-
-.ps.pdf:
-	$(RM) $@
-	-${PSPDF} $<
-
-.dvi.pdf:
-	$(RM) $@
-	-${DVIPDF} $<
-
-#.texi.pdf:
-#	$(RM) $@
-#	-${TEXI2PDF} $<
-
-all: info dvi html ps text pdf
-nodvi: info html text
-
-xdist: $(DIST_DOCS)
-
-info:	$(INFOOBJ)
-dvi:	$(DVIOBJ)
-ps:	$(PSOBJ)
-html:	$(HTMLOBJ)
-text:	$(TEXTOBJ)
-pdf:	$(PDFOBJ)
-
-readline.dvi: $(RLSRC)
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2DVI) $(srcdir)/rlman.texi
-	mv rlman.dvi readline.dvi
-
-readline.info: $(RLSRC)
-	$(MAKEINFO) --no-split -I $(TEXINPUTDIR) -o $@ $(srcdir)/rlman.texi
-
-rluserman.dvi: $(RLSRC)
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2DVI) $(srcdir)/rluserman.texi
-
-rluserman.info: $(RLSRC)
-	$(MAKEINFO) --no-split -I $(TEXINPUTDIR) -o $@ $(srcdir)/rluserman.texi
-
-history.dvi: ${HISTSRC}
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2DVI) $(srcdir)/history.texi
-
-history.info: ${HISTSRC}
-	$(MAKEINFO) --no-split -I $(TEXINPUTDIR) -o $@ $(srcdir)/history.texi
-
-readline.ps:	readline.dvi
-	$(RM) $@
-	$(DVIPS) readline.dvi
-
-rluserman.ps:	rluserman.dvi
-	$(RM) $@
-	$(DVIPS) rluserman.dvi
-
-history.ps:	history.dvi
-	$(RM) $@
-	$(DVIPS) history.dvi
-
-#
-# This leaves readline.html and rlman.html -- rlman.html is for www.gnu.org
-#
-readline.html:	${RLSRC}
-	$(TEXI2HTML) -menu -monolithic -I $(TEXINPUTDIR) $(srcdir)/rlman.texi
-	sed -e 's:rlman.html:readline.html:g' rlman.html > readline.html
-	$(RM) rlman.html
-
-rluserman.html:	${RLSRC}
-	$(TEXI2HTML) -menu -monolithic -I $(TEXINPUTDIR) $(srcdir)/rluserman.texi
-
-history.html:	${HISTSRC}
-	$(TEXI2HTML) -menu -monolithic -I $(TEXINPUTDIR) $(srcdir)/history.texi
-
-readline.0: readline.3
-
-readline_3.ps: $(srcdir)/readline.3
-	${RM} $@
-	${GROFF} -man < $(srcdir)/readline.3 > $@ 
-
-history.0: history.3
-
-history_3.ps: $(srcdir)/history.3
-	${RM} $@
-	${GROFF} -man < $(srcdir)/history.3 > $@ 
-
-readline.pdf:	$(RLSRC)
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2PDF) $(srcdir)/rlman.texi
-	mv rlman.pdf $@
-
-history.pdf:	$(HISTSRC)
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2PDF) $(srcdir)/history.texi
-
-rluserman.pdf:	$(RLSRC)
-	TEXINPUTS=.:$(TEXINPUTDIR):$$TEXINPUTS $(TEXI2PDF) $(srcdir)/rluserman.texi
-
-clean:
-	$(RM) *.aux *.bak *.cp *.fn *.ky *.log *.pg *.toc *.tp *.vr *.cps \
-	      *.pgs *.bt *.bts *.rw *.rws *.fns *.kys *.tps *.vrs *.o \
-	      core *.core
-
-mostlyclean: clean
-
-distclean: clean maybe-clean
-	$(RM) $(INTERMEDIATE_OBJ)
-	$(RM) Makefile
-
-maybe-clean:
-	-if test "X$(topdir)" != "X.." && test "X$(topdir)" != "X$(BUILD_DIR)"; then \
-		$(RM) $(DIST_DOCS); \
-	fi
-
-maintainer-clean: clean
-	$(RM) $(DIST_DOCS)
-	$(RM) $(INTERMEDIATE_OBJ)
-	$(RM) $(PDFOBJ)
-	$(RM) Makefile
-
-installdirs:	$(topdir)/support/mkdirs
-	-$(SHELL) $(topdir)/support/mkdirs $(DESTDIR)$(infodir) $(DESTDIR)$(man3dir)
-	-if test -n "${htmldir}" ; then \
-		$(SHELL) $(topdir)/support/mkdirs $(DESTDIR)$(htmldir) ; \
-	fi
-
-install:	installdirs
-	if test -f readline.info; then \
-		${INSTALL_DATA} readline.info $(DESTDIR)$(infodir)/readline.info; \
-	else \
-		${INSTALL_DATA} $(srcdir)/readline.info $(DESTDIR)$(infodir)/readline.info; \
-	fi
-	if test -f rluserman.info; then \
-		${INSTALL_DATA} rluserman.info $(DESTDIR)$(infodir)/rluserman.info; \
-	else \
-		${INSTALL_DATA} $(srcdir)/rluserman.info $(DESTDIR)$(infodir)/rluserman.info; \
-	fi
-	if test -f history.info; then \
-		${INSTALL_DATA} history.info $(DESTDIR)$(infodir)/history.info; \
-	else \
-		${INSTALL_DATA} $(srcdir)/history.info $(DESTDIR)$(infodir)/history.info; \
-	fi
-	-if $(SHELL) -c 'install-info --version' >/dev/null 2>&1; then \
-		install-info --dir-file=$(DESTDIR)$(infodir)/dir \
-			$(DESTDIR)$(infodir)/readline.info ; \
-		install-info --dir-file=$(DESTDIR)$(infodir)/dir \
-			$(DESTDIR)$(infodir)/history.info ; \
-		install-info --dir-file=$(DESTDIR)$(infodir)/dir \
-			$(DESTDIR)$(infodir)/rluserman.info ; \
-	else true; fi
-	-${INSTALL_DATA} $(srcdir)/readline.3 $(DESTDIR)$(man3dir)/readline$(man3ext)
-	-${INSTALL_DATA} $(srcdir)/history.3 $(DESTDIR)$(man3dir)/history$(man3ext)
-	-if test -n "${htmldir}" ; then \
-		if test -f readline.html; then \
-			${INSTALL_DATA} readline.html $(DESTDIR)$(htmldir)/readline.html; \
-		else \
-			${INSTALL_DATA} $(srcdir)/readline.html $(DESTDIR)$(htmldir)/readline.html; \
-		fi ; \
-		if test -f history.html; then \
-			${INSTALL_DATA} history.html $(DESTDIR)$(htmldir)/history.html; \
-		else \
-			${INSTALL_DATA} $(srcdir)/history.html $(DESTDIR)$(htmldir)/history.html; \
-		fi ; \
-		if test -f rluserman.html; then \
-			${INSTALL_DATA} rluserman.html $(DESTDIR)$(htmldir)/rluserman.html; \
-		else \
-			${INSTALL_DATA} $(srcdir)/rluserman.html $(DESTDIR)$(htmldir)/rluserman.html; \
-		fi ; \
-	fi
-
-uninstall:
-	$(RM) $(DESTDIR)$(infodir)/readline.info
-	$(RM) $(DESTDIR)$(infodir)/rluserman.info
-	$(RM) $(DESTDIR)$(infodir)/history.info
-	$(RM) $(DESTDIR)$(man3dir)/readline$(man3ext)
-	$(RM) $(DESTDIR)$(man3dir)/history$(man3ext)
-	-if test -n "${htmldir}" ; then \
-		$(RM) $(DESTDIR)$(htmldir)/readline.html ; \
-		$(RM) $(DESTDIR)$(htmldir)/rluserman.html ; \
-		$(RM) $(DESTDIR)$(htmldir)/history.html ; \
-	fi