--- embedaddon/readline/configure.ac	2014/07/30 08:16:45	1.1.1.1
+++ embedaddon/readline/configure.ac	2021/03/17 01:01:01	1.1.1.2
@@ -5,7 +5,7 @@ dnl report bugs to chet@po.cwru.edu
 dnl
 dnl Process this file with autoconf to produce a configure script.
 
-# Copyright (C) 1987-2014 Free Software Foundation, Inc.
+# Copyright (C) 1987-2020 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
@@ -20,9 +20,9 @@ dnl Process this file with autoconf to produce a confi
 #   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 6.3, version 2.73])
+AC_REVISION([for Readline 8.1, version 2.90])
 
-AC_INIT(readline, 6.3, bug-readline@gnu.org)
+AC_INIT(readline, 8.1, bug-readline@gnu.org)
 
 dnl make sure we are using a recent autoconf version
 AC_PREREQ(2.50)
@@ -32,42 +32,46 @@ 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=6.3
+LIBVERSION=8.1
 
 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
+opt_install_examples=yes
+opt_bracketed_paste_default=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=$enableval)
+AC_ARG_ENABLE(install-examples, AC_HELP_STRING([--disable-install-examples], [don't install examples [[default=install]]]), opt_install_examples=$enableval)
 
+AC_ARG_ENABLE(bracketed-paste-default, AC_HELP_STRING([--disable-bracketed-paste-default], [disable bracketed paste by default [[default=enable]]]), opt_bracketed_paste_default=$enableval)
+
 if test $opt_multibyte = no; then
 AC_DEFINE(NO_MULTIBYTE_SUPPORT)
 fi
 
+if test $opt_bracketed_paste_default = yes; then
+	BRACKETED_PASTE='-DBRACKETED_PASTE_DEFAULT=1'
+else
+	BRACKETED_PASTE='-DBRACKETED_PASTE_DEFAULT=0'
+fi
+AC_SUBST(BRACKETED_PASTE)
+
 dnl load up the cross-building cache file -- add more cases and cache
 dnl files as necessary
 
@@ -103,15 +107,18 @@ echo "Beginning configuration for readline-$LIBVERSION
 echo ""
 
 # We want these before the checks, so the checks can modify their values.
-test -z "$CFLAGS" && CFLAGS=-g auto_cflags=1
+test -z "$CFLAGS" && want_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="$CFLAGS -O"
+# If we're using gcc and the user hasn't specified CFLAGS, add -O2 to CFLAGS
+if test -n "$want_auto_cflags" ; then
+	AUTO_CFLAGS="-g ${GCC+-O2}"
+	STYLE_CFLAGS="${GCC+-Wno-parentheses} ${GCC+-Wno-format-security}"
+fi
 
 AC_PROG_GCC_TRADITIONAL
 AC_PROG_INSTALL
@@ -139,18 +146,19 @@ AC_HEADER_STDC
 AC_HEADER_STAT
 AC_HEADER_DIRENT
 
-AC_CHECK_FUNCS(fcntl kill lstat)
-AC_CHECK_FUNCS(memmove putenv select setenv setlocale \
+AC_CHECK_FUNCS(fcntl kill lstat readlink)
+AC_CHECK_FUNCS(fnmatch 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/pte.h sys/stream.h sys/select.h sys/file.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,,,
 [[
@@ -183,6 +191,7 @@ BASH_STRUCT_WINSIZE
 BASH_STRUCT_DIRENT_D_INO
 BASH_STRUCT_DIRENT_D_FILENO
 
+AC_CHECK_HEADERS(libaudit.h)
 AC_CHECK_DECLS([AUDIT_USER_TTY],,, [[#include <linux/audit.h>]])
 
 dnl yuck
@@ -197,7 +206,19 @@ if test "$TERMCAP_LIB" = "./lib/termcap/libtermcap.a";
 		TERMCAP_LIB=-ltermcap	#default
 	fi
 fi
+# Windows ncurses installation
+if test "$TERMCAP_LIB" = "-lncurses"; then
+	AC_CHECK_HEADERS(ncurses/termcap.h)
+fi
 
+case "$TERMCAP_LIB" in
+-ltinfo)  TERMCAP_PKG_CONFIG_LIB=tinfo ;;
+-lcurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
+-lncurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
+-ltermcap) TERMCAP_PKG_CONFIG_LIB=termcap ;;
+*) TERMCAP_PKG_CONFIG_LIB=termcap ;;
+esac
+
 BASH_CHECK_MULTIBYTE
 
 case "$host_cpu" in
@@ -207,6 +228,7 @@ esac
 
 case "$host_os" in
 isc*)	LOCAL_CFLAGS=-Disc386 ;;
+hpux*)	LOCAL_CFLAGS="-DTGETENT_BROKEN -DTGETFLAG_BROKEN" ;;
 esac
 
 # shared library configuration section
@@ -268,6 +290,11 @@ AC_SUBST(SHARED_TARGET)
 AC_SUBST(STATIC_INSTALL_TARGET)
 AC_SUBST(SHARED_INSTALL_TARGET)
 
+if test "$opt_install_examples" = "yes"; then
+	EXAMPLES_INSTALL_TARGET=install-examples
+fi
+AC_SUBST(EXAMPLES_INSTALL_TARGET)
+
 case "$build_os" in
 msdosdjgpp*)	BUILD_DIR=`pwd.exe` ;;	# to prevent //d/path/file
 *)		BUILD_DIR=`pwd` ;;
@@ -278,9 +305,13 @@ case "$BUILD_DIR" in
 *)	;;
 esac
 
-AC_SUBST(PURIFY)
 AC_SUBST(BUILD_DIR)
 
+if test -n "$want_auto_cflags"; then
+	CFLAGS="$AUTO_CFLAGS"
+fi
+CFLAGS="$CFLAGS $STYLE_CFLAGS"
+
 AC_SUBST(CFLAGS)
 AC_SUBST(LOCAL_CFLAGS)
 AC_SUBST(LOCAL_LDFLAGS)
@@ -295,8 +326,9 @@ AC_SUBST(host_os)
 AC_SUBST(LIBVERSION)
 
 AC_SUBST(TERMCAP_LIB)
+AC_SUBST(TERMCAP_PKG_CONFIG_LIB)
 
-AC_OUTPUT([Makefile doc/Makefile examples/Makefile shlib/Makefile],
+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