1#
2#    Copyright 2014-2016 Nest Labs Inc. All Rights Reserved.
3#
4#    Licensed under the Apache License, Version 2.0 (the "License");
5#    you may not use this file except in compliance with the License.
6#    You may obtain a copy of the License at
7#
8#    http://www.apache.org/licenses/LICENSE-2.0
9#
10#    Unless required by applicable law or agreed to in writing, software
11#    distributed under the License is distributed on an "AS IS" BASIS,
12#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13#    See the License for the specific language governing permissions and
14#    limitations under the License.
15#
16
17#
18#    Description:
19#      This file implements a GNU M4 autoconf macro for checking for
20#      the existence of files.
21#
22#      The autoconf version of AC_CHECK_FILE is absolutely broken in
23#      that it cannot check for files when cross-compiling even though
24#      the only thing it relies upon is a shell file readability
25#      check.
26#
27
28# AX_CHECK_FILE(FILE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
29# -------------------------------------------------------------
30#
31# Check for the existence of FILE.
32AC_DEFUN([AX_CHECK_FILE],
33[AS_VAR_PUSHDEF([ac_File], [ac_cv_file_$1])dnl
34AC_CACHE_CHECK([for $1], [ac_File],
35[if test -r "$1"; then
36  AS_VAR_SET([ac_File], [yes])
37else
38  AS_VAR_SET([ac_File], [no])
39fi])
40AS_VAR_IF([ac_File], [yes], [$2], [$3])
41AS_VAR_POPDEF([ac_File])dnl
42])# AX_CHECK_FILE
43