Add definition of AS_ECHO for compatibility with Autoconf before 2.62.

Requested and tested by partner.

diff --git a/m4/as_echo.m4 b/m4/as_echo.m4
new file mode 100644 (file)
index 0000000..c80c6c2
--- /dev/null
+++ b/m4/as_echo.m4
@@ -0,0 +1,96 @@
+# This file is part of Autoconf.                          -*- Autoconf -*-
+# M4 sugar for common shell constructs.
+# Requires GNU M4 and M4sugar.
+#
+# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+# 2009, 2010 Free Software Foundation, Inc.
+
+# This file is part of Autoconf.  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.
+#
+# Under Section 7 of GPL version 3, you are granted additional
+# permissions described in the Autoconf Configure Script Exception,
+# version 3.0, as published by the Free Software Foundation.
+#
+# You should have received a copy of the GNU General Public License
+# and a copy of the Autoconf Configure Script Exception along with
+# this program; see the files COPYINGv3 and COPYING.EXCEPTION
+# respectively.  If not, see <http://www.gnu.org/licenses/>.
+
+# Written by Akim Demaille, Pavel Roskin, Alexandre Oliva, Lars J. Aas
+# and many other people.
+
+# Define AS_ECHO for compatibility with Autoconf before version 2.62.
+m4_ifndef([AS_ECHO], [
+
+# AS_ECHO(WORD)
+# -------------
+# Output WORD followed by a newline.  WORD must be a single shell word
+# (typically a quoted string).  The bytes of WORD are output as-is, even
+# if it starts with "-" or contains "\".
+m4_defun_init([AS_ECHO],
+[AS_REQUIRE([_$0_PREPARE])],
+[$as_echo $1])
+
+
+# AS_ECHO_N(WORD)
+# ---------------
+# Like AS_ECHO(WORD), except do not output the trailing newline.
+m4_defun_init([AS_ECHO_N],
+[AS_REQUIRE([_AS_ECHO_PREPARE])],
+[$as_echo_n $1])
+
+
+# _AS_ECHO_PREPARE
+# ----------------
+# Arrange for $as_echo 'FOO' to echo FOO without escape-interpretation;
+# and similarly for $as_echo_n, which omits the trailing newline.
+# 'FOO' is an optional single argument; a missing FOO is treated as empty.
+m4_defun([_AS_ECHO_PREPARE],
+[[as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='printf %s\n'
+  as_echo_n='printf %s'
+else
+  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+    as_echo_body='eval /usr/ucb/echo -n "$][1$as_nl"'
+    as_echo_n='/usr/ucb/echo -n'
+  else
+    as_echo_body='eval expr "X$][1" : "X\\(.*\\)"'
+    as_echo_n_body='eval
+      arg=$][1;
+      case $arg in @%:@(
+      *"$as_nl"*)
+       expr "X$arg" : "X\\(.*\\)$as_nl";
+       arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+      esac;
+      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+    '
+    export as_echo_n_body
+    as_echo_n='sh -c $as_echo_n_body as_echo'
+  fi
+  export as_echo_body
+  as_echo='sh -c $as_echo_body as_echo'
+fi
+]])# _AS_ECHO_PREPARE
+])