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https://github.com/ceph/ceph
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44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
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# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_cxx_static_cast.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CXX_STATIC_CAST
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#
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# DESCRIPTION
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#
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# If the compiler supports static_cast<>, define HAVE_STATIC_CAST.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Todd Veldhuizen
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# Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 6
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AU_ALIAS([AC_CXX_STATIC_CAST], [AX_CXX_STATIC_CAST])
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AC_DEFUN([AX_CXX_STATIC_CAST],
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[AC_CACHE_CHECK(whether the compiler supports static_cast<>,
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ax_cv_cxx_static_cast,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <typeinfo>
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class Base { public : Base () {} virtual void f () = 0; };
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class Derived : public Base { public : Derived () {} virtual void f () {} };
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int g (Derived&) { return 0; }],[
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Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
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ax_cv_cxx_static_cast=yes, ax_cv_cxx_static_cast=no)
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AC_LANG_RESTORE
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])
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if test "$ax_cv_cxx_static_cast" = yes; then
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AC_DEFINE(HAVE_STATIC_CAST,,
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[define if the compiler supports static_cast<>])
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fi
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])
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