/usr/share/aclocal/ax_cxx_header_unordered_set.m4 is in autoconf-archive 20140228-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | # ===============================================================================
# http://www.gnu.org/software/autoconf-archive/ax_cxx_header_unordered_set.html
# ===============================================================================
#
# SYNOPSIS
#
# AX_CXX_HEADER_UNORDERED_SET
#
# DESCRIPTION
#
# Check whether the C++ include <unordered_set> exists and define
# HAVE_UNORDERED_SET if it does.
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.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 6
AU_ALIAS([AC_CXX_HEADER_UNORDERED_SET], [AX_CXX_HEADER_UNORDERED_SET])
AC_DEFUN([AX_CXX_HEADER_UNORDERED_SET], [
AC_CACHE_CHECK(for unordered_set,
ax_cv_cxx_unordered_set,
[AC_REQUIRE([AC_COMPILE_STDCXX_0X])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=gnu++0x"
AC_TRY_COMPILE([#include <unordered_set>], [using std::unordered_set;],
ax_cv_cxx_unordered_set=yes, ax_cv_cxx_unordered_set=no)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
if test "$ax_cv_cxx_unordered_set" = yes; then
AC_DEFINE(HAVE_UNORDERED_SET,,[Define if unordered_set is present. ])
fi
])
|