mirror of
https://github.com/ceph/ceph
synced 2024-12-13 15:08:33 +00:00
44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
# ===========================================================================
|
|
# http://www.gnu.org/software/autoconf-archive/ax_cxx_static_cast.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_CXX_STATIC_CAST
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# If the compiler supports static_cast<>, define HAVE_STATIC_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 6
|
|
|
|
AU_ALIAS([AC_CXX_STATIC_CAST], [AX_CXX_STATIC_CAST])
|
|
AC_DEFUN([AX_CXX_STATIC_CAST],
|
|
[AC_CACHE_CHECK(whether the compiler supports static_cast<>,
|
|
ax_cv_cxx_static_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 () {} };
|
|
int g (Derived&) { return 0; }],[
|
|
Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
|
|
ax_cv_cxx_static_cast=yes, ax_cv_cxx_static_cast=no)
|
|
AC_LANG_RESTORE
|
|
])
|
|
if test "$ax_cv_cxx_static_cast" = yes; then
|
|
AC_DEFINE(HAVE_STATIC_CAST,,
|
|
[define if the compiler supports static_cast<>])
|
|
fi
|
|
])
|