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