Back to the Main Page. | Download the M4 Source. |
AC_CXX_COMPLEX_MATH_IN_NAMESPACE_STD
1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.39
Luc Maisonobe
If the C math functions are in the cmath header file and std:: namespace, define HAVE_MATH_FN_IN_NAMESPACE_STD.
AC_DEFUN([AC_CXX_COMPLEX_MATH_IN_NAMESPACE_STD], [AC_CACHE_CHECK(whether complex math functions are in std::, ac_cv_cxx_complex_math_in_namespace_std, [AC_REQUIRE([AC_CXX_NAMESPACES]) AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([#include <complex> namespace S { using namespace std; complex<float> pow(complex<float> x, complex<float> y) { return std::pow(x,y); } }; ],[using namespace S; complex<float> x = 1.0, y = 1.0; S::pow(x,y); return 0;], ac_cv_cxx_complex_math_in_namespace_std=yes, ac_cv_cxx_complex_math_in_namespace_std=no) AC_LANG_RESTORE ]) if test "$ac_cv_cxx_complex_math_in_namespace_std" = yes; then AC_DEFINE(HAVE_COMPLEX_MATH_IN_NAMESPACE_STD,, [define if complex math functions are in std::]) fi ])