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- # ============================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_cxx_reinterpret_cast.html
- # ============================================================================
- #
- # SYNOPSIS
- #
- # AX_CXX_REINTERPRET_CAST
- #
- # DESCRIPTION
- #
- # If the compiler supports reinterpret_cast<>, define
- # HAVE_REINTERPRET_CAST.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Todd Veldhuizen
- # Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 7
-
- AU_ALIAS([AC_CXX_REINTERPRET_CAST], [AX_CXX_REINTERPRET_CAST])
- AC_DEFUN([AX_CXX_REINTERPRET_CAST],
- [AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
- ax_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);],
- ax_cv_cxx_reinterpret_cast=yes, ax_cv_cxx_reinterpret_cast=no)
- AC_LANG_RESTORE
- ])
- if test "$ax_cv_cxx_reinterpret_cast" = yes; then
- AC_DEFINE(HAVE_REINTERPRET_CAST,,
- [define if the compiler supports reinterpret_cast<>])
- fi
- ])
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