Macro: ac_cxx_have_complex

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Synopsis

  `AC_CXX_HAVE_COMPLEX`

Version

  1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.39

Author

  Luc Maisonobe

Description

  If the compiler has complex<T>, define HAVE_COMPLEX.

M4 Source Code

      AC_DEFUN([AC_CXX_HAVE_COMPLEX],
      [AC_CACHE_CHECK(whether the compiler has complex<T>,
      ac_cv_cxx_have_complex,
      [AC_REQUIRE([AC_CXX_NAMESPACES])
       AC_LANG_SAVE
       AC_LANG_CPLUSPLUS
       AC_TRY_COMPILE([#include <complex>
      #ifdef HAVE_NAMESPACES
      using namespace std;
      #endif],[complex<float> a; complex<double> b; return 0;],
       ac_cv_cxx_have_complex=yes, ac_cv_cxx_have_complex=no)
       AC_LANG_RESTORE
      ])
      if test "$ac_cv_cxx_have_complex" = yes; then
        AC_DEFINE(HAVE_COMPLEX,,[define if the compiler has complex<T>])
      fi
      ])