A C library for asynchronous DNS requests (grpc依赖)
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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_ac_append_to_file.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_AC_APPEND_TO_FILE([FILE],[DATA])
#
# DESCRIPTION
#
# Appends the specified data to the specified Autoconf is run. If you want
# to append to a file when configure is run use AX_APPEND_TO_FILE instead.
#
# LICENSE
#
# Copyright (c) 2009 Allan Caffee <allan.caffee@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 10
AC_DEFUN([AX_AC_APPEND_TO_FILE],[
AC_REQUIRE([AX_FILE_ESCAPES])
m4_esyscmd(
AX_FILE_ESCAPES
[
printf "%s" "$2" >> "$1"
])
])