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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_cxx_const_cast.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_CXX_CONST_CAST
- #
- # DESCRIPTION
- #
- # If the compiler supports const_cast<>, define HAVE_CONST_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 8
-
- AU_ALIAS([AC_CXX_CONST_CAST], [AX_CXX_CONST_CAST])
- AC_DEFUN([AX_CXX_CONST_CAST],
- [dnl
- AC_CACHE_CHECK([whether the compiler supports const_cast<>],
- ax_cv_cxx_const_cast,
- [dnl
- AC_LANG_PUSH([C++])
- AC_COMPILE_IFELSE([dnl
- AC_LANG_PROGRAM([],
- [int x = 0;
- const int& y = x;
- int& z = const_cast<int&>(y);
- return z;])],
- ax_cv_cxx_const_cast=yes,
- ax_cv_cxx_const_cast=no)
- AC_LANG_POP([C++])
- ])
- AS_IF([test "X$ax_cv_cxx_const_cast" = Xyes],
- [AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])])
- ])
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