Sync readline/ to version 7.0 alpha

This patch syncs our upstream copy of readline from version 6.2 to the
latest version, 7.0 alpha (released July 10 2015).

I essentially copied what was done the last time readline was synced,
when Jan updated to readline 6.2 in 2011:
http://sourceware.org/ml/gdb-patches/2011-05/msg00003.html

Procedure:

1. I extracted the readline-7.0-alpha tarball on top of readline/.
2. I deleted all the new files under doc/ that were deliberately omitted
   before.
3. I regenerated readline/configure and readline/examples/rlfe/configure
   using autoconf 2.64.  No other configure files need regenerating.
4. I updated the function gdb_printable_part in completer.c with a
   trivial change made to the readline function it is based off of,
   printable_part in readline/complete.c.  There is more work to be done in
   completer.c to sync it with readline/complete.c, but it is non-trivial
   and should probably be done separately anyway.

Local patches that had to be reapplied:

    None.  readline 7.0 alpha contains all of our local readline
    patches.

New files in readline/:

    colors.{c,h}
    examples/{hist_erasedups,hist_purgecmd,rl-callbacktest,rlbasic}.c
    parse-colors.{c,h}
    readline.pc.in
    configure.ac

Deleted files in readline/:

    configure.in

Regressions:

After the sync there is one testsuite regression, the test
"signal SIGINT" in gdb.gdb/selftest.exp which now FAILs.  Previously,
the readline 6.2 SIGINT handler would temporarily reinstall the
underlying application's SIGINT handler and immediately re-raise SIGINT
so that the orginal handler gets invoked.  But now (since readline 6.3)
its SIGINT handler does not re-raise SIGINT or directly invoke the
original handler; it now sets a flag marking that SIGINT was raised, and
waits until readline explicitly has control to call the application's
SIGINT handler.  Anyway, because SIGINT is no longer re-raised from
within readline's SIGINT handler, doing "signal SIGINT" with a stopped
inferior gdb process will no longer resume and then immediately stop the
process (since there is no 2nd SIGINT to immediately catch).  Instead,
the inferior gdb process will now just print "Quit" and continue to run.
So with this commit, this particular test case is adjusted to reflect
this change in behavior (we now have to send a 2nd SIGINT manually to
stop it).

Aside from this one testsuite regression, I personally noticed no
regression in user-visible behavior.  Though I only tested on x86_64
and on i686 Debian Stretch.

Getting this kind of change in at the start of the GDB 7.11 development
cycle will allow us to get a lot of passive testing from developers and
from bleeding-edge users.

readline/ChangeLog.gdb:

	Import readline 7.0 alpha
	* configure: Regenerate.
	* examples/rlfe/configure: Regenerate.

gdb/ChangeLog:

	* completer.c (gdb_printable_part): Sync with readline function
	it is based off of.

gdb/testsuite/ChangeLog:

	* gdb.gdb/selftest.exp (test_with_self): Update test to now
	expect the GDB inferior to no longer immediately stop after
	being resumed with "signal SIGINT".

1 files changed, 308 insertions, 0 deletions

diff --git a/readline/configure.ac b/readline/configure.ac
new file mode 100644
index 0000000..42e21fa
--- /dev/null
+++ b/readline/configure.ac
@@ -0,0 +1,308 @@
+dnl
+dnl Configure script for readline library
+dnl
+dnl report bugs to chet@po.cwru.edu
+dnl
+dnl Process this file with autoconf to produce a configure script.
+
+# Copyright (C) 1987-2015 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/>.
+
+AC_REVISION([for Readline 7.0, version 2.80])
+
+AC_INIT(readline, 7.0, bug-readline@gnu.org)
+
+dnl make sure we are using a recent autoconf version
+AC_PREREQ(2.50)
+
+AC_CONFIG_SRCDIR(readline.h)
+AC_CONFIG_AUX_DIR(./support)
+AC_CONFIG_HEADERS(config.h)
+
+dnl update the value of RL_READLINE_VERSION in readline.h when this changes
+LIBVERSION=7.0
+
+AC_CANONICAL_HOST
+AC_CANONICAL_BUILD
+
+dnl configure defaults
+opt_curses=no
+opt_purify=no
+
+dnl arguments to configure
+AC_ARG_WITH(curses, AC_HELP_STRING([--with-curses], [use the curses library instead of the termcap library]), opt_curses=$withval)
+AC_ARG_WITH(purify, AC_HELP_STRING([--with-purify], [configure to postprocess with purify]), opt_purify=$withval)
+
+if test "$opt_curses" = "yes"; then
+	prefer_curses=yes
+fi
+
+if test "$opt_purify" = yes; then
+	PURIFY="purify"
+else
+	PURIFY=
+fi
+
+dnl option parsing for optional features
+opt_multibyte=yes
+opt_static_libs=yes
+opt_shared_libs=yes
+
+AC_ARG_ENABLE(multibyte, AC_HELP_STRING([--enable-multibyte], [enable multibyte characters if OS supports them]), opt_multibyte=$enableval)
+AC_ARG_ENABLE(shared, AC_HELP_STRING([--enable-shared], [build shared libraries [[default=YES]]]), opt_shared_libs=$enableval)
+AC_ARG_ENABLE(static, AC_HELP_STRING([--enable-static], [build static libraries [[default=YES]]]), opt_static_libs=$enableval)
+
+if test $opt_multibyte = no; then
+AC_DEFINE(NO_MULTIBYTE_SUPPORT)
+fi
+
+dnl load up the cross-building cache file -- add more cases and cache
+dnl files as necessary
+
+dnl Note that host and target machine are the same, and different than the
+dnl build machine.
+
+CROSS_COMPILE=
+if test "x$cross_compiling" = "xyes"; then
+    case "${host}" in
+    *-cygwin*)
+        cross_cache=${srcdir}/cross-build/cygwin.cache
+        ;;
+    *-mingw*)
+        cross_cache=${srcdir}/cross-build/mingw.cache
+        ;;
+    i[[3456]]86-*-beos*)
+        cross_cache=${srcdir}/cross-build/x86-beos.cache
+        ;;
+    *)  echo "configure: cross-compiling for $host is not supported" >&2
+        ;;
+    esac
+    if test -n "${cross_cache}" && test -r "${cross_cache}"; then
+        echo "loading cross-build cache file ${cross_cache}"
+        . ${cross_cache}
+    fi
+    unset cross_cache
+    CROSS_COMPILE='-DCROSS_COMPILING'
+    AC_SUBST(CROSS_COMPILE)
+fi
+
+echo ""
+echo "Beginning configuration for readline-$LIBVERSION for ${host_cpu}-${host_vendor}-${host_os}"
+echo ""
+
+# We want these before the checks, so the checks can modify their values.
+test -z "$CFLAGS" && CFLAGS=-g auto_cflags=1
+
+AC_PROG_MAKE_SET
+AC_PROG_CC
+dnl AC_AIX
+AC_MINIX
+
+# If we're using gcc and the user hasn't specified CFLAGS, add -O to CFLAGS.
+test -n "$GCC" && test -n "$auto_cflags" && CFLAGS="$CFLAGS -O"
+
+AC_PROG_GCC_TRADITIONAL
+AC_PROG_INSTALL
+AC_CHECK_TOOL(AR, ar)
+dnl Set default for ARFLAGS, since autoconf does not have a macro for it.
+dnl This allows people to set it when running configure or make
+test -n "$ARFLAGS" || ARFLAGS="cr"
+AC_PROG_RANLIB
+
+MAKE_SHELL=/bin/sh
+AC_SUBST(MAKE_SHELL)
+
+AC_C_CONST
+AC_C_PROTOTYPES
+AC_C_CHAR_UNSIGNED
+AC_C_VOLATILE
+
+AC_TYPE_SIGNAL
+
+AC_TYPE_SIZE_T
+AC_CHECK_TYPE(ssize_t, int)
+
+AC_HEADER_STDC
+
+AC_HEADER_STAT
+AC_HEADER_DIRENT
+
+AC_CHECK_FUNCS(fcntl kill lstat readlink)
+AC_CHECK_FUNCS(memmove pselect putenv select setenv setlocale \
+		strcasecmp strpbrk tcgetattr vsnprintf)
+AC_CHECK_FUNCS(isascii isxdigit)
+AC_CHECK_FUNCS(getpwent getpwnam getpwuid)
+
+AC_FUNC_CHOWN
+AC_FUNC_STRCOLL
+
+AC_CHECK_HEADERS(fcntl.h unistd.h stdlib.h varargs.h stdarg.h stdbool.h \
+		string.h strings.h \
+		limits.h locale.h pwd.h memory.h termcap.h termios.h termio.h)
+AC_CHECK_HEADERS(sys/ioctl.h sys/pte.h sys/stream.h sys/select.h sys/file.h)
+
+AC_CHECK_HEADERS(sys/ptem.h,,,
+[[
+#if HAVE_SYS_STREAM_H
+#  include <sys/stream.h>
+#endif
+]])
+
+AC_SYS_LARGEFILE
+
+BASH_SYS_SIGNAL_VINTAGE
+BASH_SYS_REINSTALL_SIGHANDLERS
+
+BASH_FUNC_POSIX_SETJMP
+BASH_FUNC_LSTAT
+BASH_FUNC_STRCOLL
+BASH_FUNC_CTYPE_NONASCII
+
+BASH_CHECK_GETPW_FUNCS
+
+AC_HEADER_TIOCGWINSZ
+
+BASH_TYPE_SIG_ATOMIC_T
+BASH_TYPE_SIGHANDLER
+
+BASH_HAVE_TIOCSTAT
+BASH_HAVE_FIONREAD
+BASH_CHECK_SPEED_T
+BASH_STRUCT_WINSIZE
+BASH_STRUCT_DIRENT_D_INO
+BASH_STRUCT_DIRENT_D_FILENO
+
+AC_CHECK_DECLS([AUDIT_USER_TTY],,, [[#include <linux/audit.h>]])
+
+dnl yuck
+case "$host_os" in
+aix*)   prefer_curses=yes ;;
+esac
+BASH_CHECK_LIB_TERMCAP
+if test "$TERMCAP_LIB" = "./lib/termcap/libtermcap.a"; then
+	if test "$prefer_curses" = yes; then
+		TERMCAP_LIB=-lcurses
+	else
+		TERMCAP_LIB=-ltermcap	#default
+	fi
+fi
+# Windows ncurses installation
+if test "$TERMCAP_LIB" = "-lncurses"; then
+	AC_CHECK_HEADERS(ncurses/termcap.h)
+fi
+
+BASH_CHECK_MULTIBYTE
+
+case "$host_cpu" in
+*cray*)	LOCAL_CFLAGS=-DCRAY ;;
+*s390*) LOCAL_CFLAGS=-fsigned-char ;;
+esac
+
+case "$host_os" in
+isc*)	LOCAL_CFLAGS=-Disc386 ;;
+esac
+
+# shared library configuration section
+#
+# Shared object configuration section.  These values are generated by
+# ${srcdir}/support/shobj-conf
+#
+if test -f ${srcdir}/support/shobj-conf; then
+        AC_MSG_CHECKING(configuration for building shared libraries)
+        eval `TERMCAP_LIB=$TERMCAP_LIB ${CONFIG_SHELL-/bin/sh} ${srcdir}/support/shobj-conf -C "${CC}" -c ${host_cpu} -o ${host_os} -v ${host_vendor}`
+
+#	case "$SHLIB_LIBS" in
+#	*curses*|*termcap*|*termlib*)	;;
+#	*)			SHLIB_LIBS="$SHLIB_LIBS $TERMCAP_LIB" ;;
+#	esac
+	
+        AC_SUBST(SHOBJ_CC)
+        AC_SUBST(SHOBJ_CFLAGS)
+        AC_SUBST(SHOBJ_LD)
+        AC_SUBST(SHOBJ_LDFLAGS)
+	AC_SUBST(SHOBJ_XLDFLAGS)
+        AC_SUBST(SHOBJ_LIBS)
+        AC_SUBST(SHOBJ_STATUS)
+	AC_SUBST(SHLIB_STATUS)
+	AC_SUBST(SHLIB_XLDFLAGS)
+	AC_SUBST(SHLIB_DOT)
+	AC_SUBST(SHLIB_LIBPREF)
+	AC_SUBST(SHLIB_LIBSUFF)
+	AC_SUBST(SHLIB_LIBVERSION)
+	AC_SUBST(SHLIB_DLLVERSION)
+	AC_SUBST(SHLIB_LIBS)
+        AC_MSG_RESULT($SHLIB_STATUS)
+
+	# SHLIB_STATUS is either `supported' or `unsupported'.  If it's
+	# `unsupported', turn off any default shared library building
+	if test "$SHLIB_STATUS" = 'unsupported'; then
+		opt_shared_libs=no
+	fi
+
+	# shared library versioning
+	# quoted for m4 so I can use character classes
+	SHLIB_MAJOR=[`expr "$LIBVERSION" : '\([0-9]\)\..*'`]
+	SHLIB_MINOR=[`expr "$LIBVERSION" : '[0-9]\.\([0-9]\).*'`]
+	AC_SUBST(SHLIB_MAJOR)
+	AC_SUBST(SHLIB_MINOR)
+fi
+
+if test "$opt_static_libs" = "yes"; then
+	STATIC_TARGET=static
+	STATIC_INSTALL_TARGET=install-static
+fi
+if test "$opt_shared_libs" = "yes"; then
+	SHARED_TARGET=shared
+	SHARED_INSTALL_TARGET=install-shared
+fi
+
+AC_SUBST(STATIC_TARGET)
+AC_SUBST(SHARED_TARGET)
+AC_SUBST(STATIC_INSTALL_TARGET)
+AC_SUBST(SHARED_INSTALL_TARGET)
+
+case "$build_os" in
+msdosdjgpp*)	BUILD_DIR=`pwd.exe` ;;	# to prevent //d/path/file
+*)		BUILD_DIR=`pwd` ;;
+esac
+
+case "$BUILD_DIR" in
+*\ *)	BUILD_DIR=`echo "$BUILD_DIR" | sed 's: :\\\\ :g'` ;;
+*)	;;
+esac
+
+AC_SUBST(PURIFY)
+AC_SUBST(BUILD_DIR)
+
+AC_SUBST(CFLAGS)
+AC_SUBST(LOCAL_CFLAGS)
+AC_SUBST(LOCAL_LDFLAGS)
+AC_SUBST(LOCAL_DEFS)
+
+AC_SUBST(AR)
+AC_SUBST(ARFLAGS)
+
+AC_SUBST(host_cpu)
+AC_SUBST(host_os)
+
+AC_SUBST(LIBVERSION)
+
+AC_SUBST(TERMCAP_LIB)
+
+AC_OUTPUT([Makefile doc/Makefile examples/Makefile shlib/Makefile readline.pc],
+[
+# Makefile uses this timestamp file to record whether config.h is up to date.
+echo > stamp-h
+])