dnl $Id: ac_cxx_have_complex_math1.m4,v 1.2 2004/04/23 23:41:52 opetzold Exp $
dnl
dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_complex_math1.html
dnl

AC_DEFUN([AC_CXX_HAVE_COMPLEX_MATH1],
[AC_CACHE_CHECK(whether the compiler has complex math functions,
ac_cv_cxx_have_complex_math1,
[AC_REQUIRE([AC_CXX_NAMESPACES])
 AC_LANG_PUSH([C++])
 ac_save_LIBS="$LIBS"
 LIBS="$LIBS -lm"
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <complex>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif]], [[complex<double> x(1.0, 1.0), y(1.0, 1.0);
cos(x); cosh(x); exp(x); log(x); pow(x,1); pow(x,double(2.0));
pow(x, y); pow(double(2.0), x); sin(x); sinh(x); sqrt(x); tan(x); tanh(x);
return 0;]])],[ac_cv_cxx_have_complex_math1=yes],[ac_cv_cxx_have_complex_math1=no])
 LIBS="$ac_save_LIBS"
 AC_LANG_POP([C++])
])
if test "$ac_cv_cxx_have_complex_math1" = yes; then
  AC_DEFINE(HAVE_COMPLEX_MATH1,,[define if the compiler has complex math functions])
fi
])