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added AC_CXX_REINTERPRET_CAST

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29511 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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Vadim Zeitlin 2004-09-28 21:44:59 +00:00
parent 8c8d66c5f0
commit 4eeb39ab7c
1 changed files with 21 additions and 0 deletions
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21
acinclude.m4
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@ -595,6 +595,27 @@ if test "$ac_cv_cxx_const_cast" = yes; then
fi
])
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html
AC_DEFUN([AC_CXX_REINTERPRET_CAST],
[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
ac_cv_cxx_reinterpret_cast,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <typeinfo>
class Base { public : Base () {} virtual void f () = 0;};
class Derived : public Base { public : Derived () {} virtual void f () {} };
class Unrelated { public : Unrelated () {} };
int g (Unrelated&) { return 0; }],[
Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_reinterpret_cast" = yes; then
AC_DEFINE(HAVE_REINTERPRET_CAST,,
[define if the compiler supports reinterpret_cast<>])
fi
])
dnl and http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_static_cast.html
AC_DEFUN([AC_CXX_STATIC_CAST],
[AC_CACHE_CHECK(whether the compiler supports static_cast<>,