Macro: ac_cxx_reinterpret_cast

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Synopsis

  `AC_CXX_REINTERPRET_CAST`

Version

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

Author

  Luc Maisonobe

Description

  If the compiler supports reinterpret_cast<>, define HAVE_REINTERPRET_CAST.

M4 Source Code

      AC_DEFUN([AC_CXX_REINTERPRET_CAST],
      [AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
      ac_cv_cxx_reinterpret_cast,
      [AC_LANG_SAVE
       AC_LANG_CPLUSPLUS
       AC_TRY_COMPILE([#include <typeinfo>
      class Base { public : Base () {} virtual void f () = 0;};
      class Derived : public Base { public : Derived () {} virtual void f () {} };
      class Unrelated { public : Unrelated () {} };
      int g (Unrelated&) { return 0; }],[
      Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
       ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
       AC_LANG_RESTORE
      ])
      if test "$ac_cv_cxx_reinterpret_cast" = yes; then
        AC_DEFINE(HAVE_REINTERPRET_CAST,,
                  [define if the compiler supports reinterpret_cast<>])
      fi
      ])