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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
])