/usr/share/aclocal/ax_cxx_have_complex_math2.m4 is in autoconf-archive 20140228-1.1.
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# http://www.gnu.org/software/autoconf-archive/ax_cxx_have_complex_math2.html
# =============================================================================
#
# SYNOPSIS
#
# AX_CXX_HAVE_COMPLEX_MATH2
#
# DESCRIPTION
#
# If the compiler has the complex math functions acos, asin, atan, atan2
# and log10, define HAVE_COMPLEX_MATH2.
#
# LICENSE
#
# Copyright (c) 2008 Todd Veldhuizen
# Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
#
# 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_HAVE_COMPLEX_MATH2], [AX_CXX_HAVE_COMPLEX_MATH2])
AC_DEFUN([AX_CXX_HAVE_COMPLEX_MATH2],
[AC_CACHE_CHECK(whether the compiler has more complex math functions,
ax_cv_cxx_have_complex_math2,
[AC_REQUIRE([AX_CXX_NAMESPACES])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([#include <complex>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif],[complex<double> x(1.0, 1.0), y(1.0, 1.0);
acos(x); asin(x); atan(x); atan2(x,y); atan2(x, double(3.0));
atan2(double(3.0), x); log10(x); return 0;],
ax_cv_cxx_have_complex_math2=yes, ax_cv_cxx_have_complex_math2=no)
LIBS="$ac_save_LIBS"
AC_LANG_RESTORE
])
if test "$ax_cv_cxx_have_complex_math2" = yes; then
AC_DEFINE(HAVE_COMPLEX_MATH2,,[define if the compiler has more complex math functions])
fi
])
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