Macro: ac_cxx_reinterpret_cast

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# ac_cxx_reinterpret_cast

## Synopsis

`AC_CXX_REINTERPRET_CAST`

## Version

1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.32

## 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
    ])