1# ====================================================================================
2#  https://www.gnu.org/software/autoconf-archive/ax_cxx_header_tr1_unordered_map.html
3# ====================================================================================
4#
5# SYNOPSIS
6#
7#   AX_CXX_HEADER_TR1_UNORDERED_MAP
8#
9# DESCRIPTION
10#
11#   Check whether the TR1 include <unordered_map> exists and define
12#   HAVE_TR1_UNORDERED_MAP if it does.
13#
14# LICENSE
15#
16#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
17#
18#   Copying and distribution of this file, with or without modification, are
19#   permitted in any medium without royalty provided the copyright notice
20#   and this notice are preserved. This file is offered as-is, without any
21#   warranty.
22
23#serial 8
24
25AU_ALIAS([AC_CXX_HEADER_TR1_UNORDERED_MAP], [AX_CXX_HEADER_TR1_UNORDERED_MAP])
26AC_DEFUN([AX_CXX_HEADER_TR1_UNORDERED_MAP], [
27  AC_CACHE_CHECK(for tr1/unordered_map,
28  ax_cv_cxx_tr1_unordered_map,
29  [AC_LANG_PUSH([C++])
30  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <tr1/unordered_map>]],
31  [[using std::tr1::unordered_map;]])],
32  [ax_cv_cxx_tr1_unordered_map=yes], [ax_cv_cxx_tr1_unordered_map=no])
33  AC_LANG_POP([C++])
34  ])
35  if test "$ax_cv_cxx_tr1_unordered_map" = yes; then
36    AC_DEFINE(HAVE_TR1_UNORDERED_MAP,,[Define if tr1/unordered_map is present. ])
37  fi
38])
39